source/blender/blenkernel/intern/dynamicpaint.c

   1 /**
   2 ***** BEGIN GPL LICENSE BLOCK *****
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * Contributor(s): Miika Hämäläinen
  10  *
  11  * ***** END GPL LICENSE BLOCK *****
  12  */
  13
  14
  15 #include "MEM_guardedalloc.h"
  16
  17 #include <math.h>
  18 #include <stdio.h>
  19
  20 #include "BLI_blenlib.h"
  21 #include "BLI_math.h"
  22 #include "BLI_kdtree.h"
  23 #include "BLI_threads.h"
  24 #include "BLI_utildefines.h"
  25
  26 #include "DNA_anim_types.h"
  27 #include "DNA_dynamicpaint_types.h"
  28 #include "DNA_group_types.h" /*GroupObject*/
  29 #include "DNA_material_types.h"
  30 #include "DNA_mesh_types.h"
  31 #include "DNA_meshdata_types.h"
  32 #include "DNA_modifier_types.h"
  33 #include "DNA_object_types.h"
  34 #include "DNA_scene_types.h"
  35 #include "DNA_space_types.h"
  36 #include "DNA_texture_types.h"
  37
  38 #include "BKE_animsys.h"
  39 #include "BKE_bvhutils.h"       /* bvh tree     */
  40 #include "BKE_blender.h"
  41 #include "BKE_cdderivedmesh.h"
  42 #include "BKE_context.h"
  43 #include "BKE_customdata.h"
  44 #include "BKE_colortools.h"
  45 #include "BKE_deform.h"
  46 #include "BKE_depsgraph.h"
  47 #include "BKE_DerivedMesh.h"
  48 #include "BKE_dynamicpaint.h"
  49 #include "BKE_effect.h"
  50 #include "BKE_global.h"
  51 #include "BKE_image.h"
  52 #include "BKE_main.h"
  53 #include "BKE_material.h"
  54 #include "BKE_modifier.h"
  55 #include "BKE_object.h"
  56 #include "BKE_particle.h"
  57 #include "BKE_pointcache.h"
  58 #include "BKE_scene.h"
  59 #include "BKE_texture.h"
  60
  61 #include "RNA_access.h"
  62 #include "RNA_define.h"
  63 #include "RNA_enum_types.h"
  64
  65 /* for image output     */
  66 #include "IMB_imbuf_types.h"
  67 #include "IMB_imbuf.h"
  68
  69 /* to read material/texture color       */
  70 #include "RE_render_ext.h"
  71 #include "RE_shader_ext.h"
  72
  73 #ifdef _OPENMP
  74 #include <omp.h>
  75 #endif
  76
  77 /* precalculated gaussian factors for 5x super sampling */
  78 static float gaussianFactors[5] = {     0.996849f,
  79                                                                 0.596145f,
  80                                                                 0.596145f,
  81                                                                 0.596145f,
  82                                                                 0.524141f};
  83 static float gaussianTotal = 3.309425f;
  84
  85 /* UV Image neighbouring pixel table x and y list */
  86 static int neighX[8] = {1,1,0,-1,-1,-1, 0, 1};
  87 static int neighY[8] = {0,1,1, 1, 0,-1,-1,-1};
  88
  89 /* subframe_updateObject() flags */
  90 #define UPDATE_PARENTS (1<<0)
  91 #define UPDATE_MESH (1<<1)
  92 #define UPDATE_EVERYTHING (UPDATE_PARENTS|UPDATE_MESH)
  93 /* surface_getBrushFlags() return vals */
  94 #define BRUSH_USES_VELOCITY (1<<0)
  95 /* brush mesh raycast status */
  96 #define HIT_VOLUME 1
  97 #define HIT_PROXIMITY 2
  98 /* paint effect default movement per frame in global units */
  99 #define EFF_MOVEMENT_PER_FRAME 0.05f
 100 /* initial wave time factor */
 101 #define WAVE_TIME_FAC 0.1
 102 /* drying limits */
 103 #define MIN_WETNESS 0.001f
 104 /* dissolve macro */
 105 #define VALUE_DISSOLVE(VALUE, TIME, SCALE, LOG) (VALUE) = (LOG) ? (VALUE) * (pow(MIN_WETNESS,1.0f/(1.2f*((float)(TIME))/(SCALE)))) : (VALUE) - 1.0f/(TIME)*(SCALE)
 106
 107 /***************************** Internal Structs ***************************/
 108
 109 typedef struct Bounds2D {
 110         float min[2], max[2];
 111 } Bounds2D;
 112
 113 typedef struct Bounds3D {
 114         int valid;
 115         float min[3], max[3];
 116 } Bounds3D;
 117
 118 typedef struct VolumeGrid {
 119         int dim[3];
 120         Bounds3D grid_bounds; /* whole grid bounds */
 121
 122         Bounds3D *bounds;       /* (x*y*z) precalculated grid cell bounds */
 123         int *s_pos; /* (x*y*z) t_index begin id */
 124         int *s_num; /* (x*y*z) number of t_index points */
 125         int *t_index; /* actual surface point index,
 126                                                    access: (s_pos+s_num) */
 127 } VolumeGrid;
 128
 129 typedef struct Vec3f {
 130         float v[3];
 131 } Vec3f;
 132
 133 typedef struct BakeNeighPoint {
 134         float dir[3];   /* vector pointing towards this neighbour */
 135         float dist;             /* distance to */
 136 } BakeNeighPoint;
 137
 138 /* Surface data used while processing a frame   */
 139 typedef struct PaintBakeNormal {
 140         float invNorm[3];  /* current pixel world-space inverted normal */
 141         float normal_scale; /* normal directional scale for displace mapping */
 142 } PaintBakeNormal;
 143
 144 /* Temp surface data used to process a frame */
 145 typedef struct PaintBakeData {
 146         /* point space data */
 147         PaintBakeNormal *bNormal;
 148         int *s_pos;     /* index to start reading point sample realCoord */
 149         int *s_num;     /* num of realCoord samples */
 150         Vec3f *realCoord;  /* current pixel center world-space coordinates for each sample
 151                                            *  ordered as (s_pos+s_num)*/
 152
 153         /* adjacency info */
 154         BakeNeighPoint *bNeighs; /* current global neighbour distances and directions, if required */
 155         double average_dist;
 156         /* space partitioning */
 157         VolumeGrid *grid;               /* space partitioning grid to optimize brush checks */
 158
 159         /* velocity and movement */
 160         Vec3f *velocity;                /* speed vector in global space movement per frame, if required */
 161         Vec3f *prev_velocity;
 162         float *brush_velocity;  /* special temp data for post-p velocity based brushes like smudge
 163                                                         *  3 float dir vec + 1 float str */
 164         MVert *prev_verts;              /* copy of previous frame vertices. used to observe surface movement */
 165         float prev_obmat[4][4]; /* previous frame object matrix */
 166         int clear;                              /* flag to check if surface was cleared/reset -> have to redo velocity etc. */
 167
 168 } PaintBakeData;
 169
 170 /* UV Image sequence format point       */
 171 typedef struct PaintUVPoint {
 172         /* Pixel / mesh data */
 173         unsigned int face_index, pixel_index;   /* face index on domain derived mesh */
 174         unsigned int v1, v2, v3;                                /* vertex indexes */
 175
 176         unsigned int neighbour_pixel;   /* If this pixel isn't uv mapped to any face,
 177                                                                            but it's neighbouring pixel is */
 178         short quad;
 179 } PaintUVPoint;
 180
 181 typedef struct ImgSeqFormatData {
 182         PaintUVPoint *uv_p;
 183         Vec3f *barycentricWeights;              /* b-weights for all pixel samples */
 184 } ImgSeqFormatData;
 185
 186 typedef struct EffVelPoint {
 187         float previous_pos[3];
 188         float previous_vel[3];
 189 } EffVelPoint;
 190
 191
 192 /* adjacency data flags */
 193 #define ADJ_ON_MESH_EDGE (1<<0)
 194
 195 typedef struct PaintAdjData {
 196         int *n_target;          /* array of neighbouring point indexes,
 197                                                                for single sample use (n_index+neigh_num) */
 198         int *n_index;           /* index to start reading n_target for each point */
 199         int *n_num;             /* num of neighs for each point */
 200         int *flags;             /* vertex adjacency flags */
 201         int total_targets; /* size of n_target */
 202 } PaintAdjData;
 203
 204 /***************************** General Utils ******************************/
 205
 206 /* Set canvas error string to display at the bake report */
 207 static int setError(DynamicPaintCanvasSettings *canvas, const char *string)
 208 {
 209         /* Add error to canvas ui info label */
 210         BLI_strncpy(canvas->error, string, sizeof(canvas->error));
 211         return 0;
 212 }
 213
 214 /* Get number of surface points for cached types */
 215 static int dynamicPaint_surfaceNumOfPoints(DynamicPaintSurface *surface)
 216 {
 217         if (surface->format == MOD_DPAINT_SURFACE_F_PTEX) {
 218                 return 0; /* not supported atm */
 219         }
 220         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
 221                 if (!surface->canvas->dm) return 0; /* invalid derived mesh */
 222                 return surface->canvas->dm->getNumVerts(surface->canvas->dm);
 223         }
 224         else
 225                 return 0;
 226 }
 227
 228 /* checks whether surface's format/type has realtime preview */
 229 int dynamicPaint_surfaceHasColorPreview(DynamicPaintSurface *surface)
 230 {
 231         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 0;
 232         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
 233                 if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE ||
 234                         surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 0;
 235                 else return 1;
 236         }
 237         else return 1;
 238 }
 239
 240 /* get currently active surface (in user interface) */
 241 struct DynamicPaintSurface *get_activeSurface(DynamicPaintCanvasSettings *canvas)
 242 {
 243         DynamicPaintSurface *surface = canvas->surfaces.first;
 244         int i;
 245
 246         for(i=0; surface; surface=surface->next) {
 247                 if(i == canvas->active_sur)
 248                         return surface;
 249                 i++;
 250         }
 251         return NULL;
 252 }
 253
 254 /* set preview to first previewable surface */
 255 void dynamicPaint_resetPreview(DynamicPaintCanvasSettings *canvas)
 256 {
 257         DynamicPaintSurface *surface = canvas->surfaces.first;
 258         int done=0;
 259
 260         for(; surface; surface=surface->next) {
 261                 if (!done && dynamicPaint_surfaceHasColorPreview(surface)) {
 262                         surface->flags |= MOD_DPAINT_PREVIEW;
 263                         done=1;
 264                 }
 265                 else
 266                         surface->flags &= ~MOD_DPAINT_PREVIEW;
 267         }
 268 }
 269
 270 /* set preview to defined surface */
 271 static void dynamicPaint_setPreview(DynamicPaintSurface *t_surface)
 272 {
 273         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
 274         for(; surface; surface=surface->next) {
 275                 if (surface == t_surface)
 276                         surface->flags |= MOD_DPAINT_PREVIEW;
 277                 else
 278                         surface->flags &= ~MOD_DPAINT_PREVIEW;
 279         }
 280 }
 281
 282 int dynamicPaint_outputLayerExists(struct DynamicPaintSurface *surface, Object *ob, int output)
 283 {
 284         char *name;
 285
 286         if (output == 0)
 287                 name = surface->output_name;
 288         else if (output == 1)
 289                 name = surface->output_name2;
 290         else
 291                 return 0;
 292
 293         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
 294                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
 295                         Mesh *me = ob->data;
 296                         return (CustomData_get_named_layer_index(&me->fdata, CD_MCOL, name) != -1);
 297                 }
 298                 else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT)
 299                         return (defgroup_name_index(ob, surface->output_name) != -1);
 300         }
 301
 302         return 0;
 303 }
 304
 305 static int surface_duplicateOutputExists(void *arg, const char *name)
 306 {
 307         DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg;
 308         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
 309
 310         for(; surface; surface=surface->next) {
 311                 if (surface!=t_surface && surface->type==t_surface->type &&
 312                         surface->format==t_surface->format) {
 313                         if (surface->output_name[0]!='\0' && !strcmp(name, surface->output_name)) return 1;
 314                         if (surface->output_name2[0]!='\0' && !strcmp(name, surface->output_name2)) return 1;
 315                 }
 316         }
 317         return 0;
 318 }
 319
 320 static void surface_setUniqueOutputName(DynamicPaintSurface *surface, char *basename, int output)
 321 {
 322         char name[64];
 323         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
 324         if (!output)
 325                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name, sizeof(surface->output_name));
 326         if (output)
 327                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name2, sizeof(surface->output_name2));
 328 }
 329
 330
 331 static int surface_duplicateNameExists(void *arg, const char *name)
 332 {
 333         DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg;
 334         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
 335
 336         for(; surface; surface=surface->next) {
 337                 if (surface!=t_surface && !strcmp(name, surface->name)) return 1;
 338         }
 339         return 0;
 340 }
 341
 342 void dynamicPaintSurface_setUniqueName(DynamicPaintSurface *surface, const char *basename)
 343 {
 344         char name[64];
 345         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
 346         BLI_uniquename_cb(surface_duplicateNameExists, surface, name, '.', surface->name, sizeof(surface->name));
 347 }
 348
 349
 350 /* change surface data to defaults on new type */
 351 void dynamicPaintSurface_updateType(struct DynamicPaintSurface *surface)
 352 {
 353         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
 354                 surface->output_name[0]='\0';
 355                 surface->output_name2[0]='\0';
 356                 surface->flags |= MOD_DPAINT_ANTIALIAS;
 357                 surface->depth_clamp = 1.0f;
 358         }
 359         else {
 360                 sprintf(surface->output_name, "dp_");
 361                 strcpy(surface->output_name2,surface->output_name);
 362                 surface->flags &= ~MOD_DPAINT_ANTIALIAS;
 363                 surface->depth_clamp = 0.0f;
 364         }
 365
 366         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
 367                 strcat(surface->output_name,"paintmap");
 368                 strcat(surface->output_name2,"wetmap");
 369                 surface_setUniqueOutputName(surface, surface->output_name2, 1);
 370         }
 371         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
 372                 strcat(surface->output_name,"displace");
 373         }
 374         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
 375                 strcat(surface->output_name,"weight");
 376         }
 377         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
 378                 strcat(surface->output_name,"wave");
 379         }
 380
 381         surface_setUniqueOutputName(surface, surface->output_name, 0);
 382
 383         /* update preview */
 384         if (dynamicPaint_surfaceHasColorPreview(surface))
 385                 dynamicPaint_setPreview(surface);
 386         else
 387                 dynamicPaint_resetPreview(surface->canvas);
 388 }
 389
 390 static int surface_totalSamples(DynamicPaintSurface *surface)
 391 {
 392         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ &&
 393                 surface->flags & MOD_DPAINT_ANTIALIAS)
 394                 return (surface->data->total_points*5);
 395         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
 396                 surface->flags & MOD_DPAINT_ANTIALIAS && surface->data->adj_data)
 397                 return (surface->data->total_points+surface->data->adj_data->total_targets);
 398
 399         return surface->data->total_points;
 400 }
 401
 402 static void blendColors(float t_color[3], float t_alpha, float s_color[3], float s_alpha, float result[4])
 403 {
 404         int i;
 405         float i_alpha = 1.0f - s_alpha;
 406         float f_alpha = t_alpha*i_alpha + s_alpha;
 407
 408         /* blend colors */
 409         if (f_alpha) {
 410                 for (i=0; i<3; i++) {
 411                         result[i] = (t_color[i]*t_alpha*i_alpha + s_color[i]*s_alpha)/f_alpha;
 412                 }
 413         }
 414         else {
 415                 copy_v3_v3(result, t_color);
 416         }
 417         /* return final alpha */
 418         result[3] = f_alpha;
 419 }
 420
 421 /* assumes source alpha > 0.0f or results NaN colors */
 422 static void mixColors(float *t_color, float t_alpha, float *s_color, float s_alpha)
 423 {
 424         float factor = (s_alpha<t_alpha) ? 1.0f : t_alpha/s_alpha;
 425
 426         /* set initial color depending on existing alpha */
 427         interp_v3_v3v3(t_color, s_color, t_color, factor);
 428         /* mix final color */
 429         interp_v3_v3v3(t_color, t_color, s_color, s_alpha);
 430 }
 431
 432 /* set "ignore cache" flag for all caches on this object */
 433 static void object_cacheIgnoreClear(Object *ob, int state)
 434 {
 435         ListBase pidlist;
 436         PTCacheID *pid;
 437         BKE_ptcache_ids_from_object(&pidlist, ob, NULL, 0);
 438
 439         for(pid=pidlist.first; pid; pid=pid->next) {
 440                 if(pid->cache) {
 441                         if (state)
 442                                 pid->cache->flag |= PTCACHE_IGNORE_CLEAR;
 443                         else
 444                                 pid->cache->flag &= ~PTCACHE_IGNORE_CLEAR;
 445                 }
 446         }
 447
 448         BLI_freelistN(&pidlist);
 449 }
 450
 451 static void subframe_updateObject(Scene *scene, Object *ob, int flags, float frame)
 452 {
 453         DynamicPaintModifierData *pmd = (DynamicPaintModifierData *)modifiers_findByType(ob, eModifierType_DynamicPaint);
 454
 455         /* if other is dynamic paint canvas, dont update */
 456         if (pmd && pmd->canvas)
 457                 return;
 458
 459         /* if object has parent, update it too */
 460         if ((flags & UPDATE_PARENTS) && ob->parent) subframe_updateObject(scene, ob->parent, 0, frame);
 461         if ((flags & UPDATE_PARENTS) && ob->track) subframe_updateObject(scene, ob->track, 0, frame);
 462
 463         /* for curve following objects, parented curve has to be updated too */
 464         if(ob->type==OB_CURVE) {
 465                 Curve *cu= ob->data;
 466                 BKE_animsys_evaluate_animdata(scene, &cu->id, cu->adt, frame, ADT_RECALC_ANIM);
 467         }
 468
 469         ob->recalc |= OB_RECALC_ALL;
 470         BKE_animsys_evaluate_animdata(scene, &ob->id, ob->adt, frame, ADT_RECALC_ANIM);
 471         if (flags & UPDATE_MESH) {
 472                 /* ignore cache clear during subframe updates
 473                 *  to not mess up cache validity */
 474                 object_cacheIgnoreClear(ob, 1);
 475                 object_handle_update(scene, ob);
 476                 object_cacheIgnoreClear(ob, 0);
 477         }
 478         else
 479                 where_is_object_time(scene, ob, frame);
 480 }
 481
 482 static void scene_setSubframe(Scene *scene, float subframe)
 483 {
 484         /* dynamic paint subframes must be done on previous frame */
 485         scene->r.cfra -= 1;
 486         scene->r.subframe = subframe;
 487 }
 488
 489 #define BRUSH_USES_VELOCITY (1<<0)
 490
 491 static int surface_getBrushFlags(DynamicPaintSurface *surface, Scene *scene)
 492 {
 493         Base *base = NULL;
 494         GroupObject *go = NULL;
 495         Object *brushObj = NULL;
 496         ModifierData *md = NULL;
 497
 498         int flags = 0;
 499
 500         if(surface->brush_group)
 501                 go = surface->brush_group->gobject.first;
 502         else
 503                 base = scene->base.first;
 504
 505         while (base || go)
 506         {
 507                 brushObj = NULL;
 508
 509                 /* select object */
 510                 if(surface->brush_group) {
 511                         if(go->ob)      brushObj = go->ob;
 512                 }
 513                 else
 514                         brushObj = base->object;
 515
 516                 if(!brushObj)
 517                 {
 518                         if(surface->brush_group) go = go->next;
 519                         else base= base->next;
 520                         continue;
 521                 }
 522
 523                 if(surface->brush_group)
 524                         go = go->next;
 525                 else
 526                         base= base->next;
 527
 528                 md = modifiers_findByType(brushObj, eModifierType_DynamicPaint);
 529                 if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render))
 530                 {
 531                         DynamicPaintModifierData *pmd2 = (DynamicPaintModifierData *)md;
 532
 533                         if (pmd2->brush)
 534                         {
 535                                 DynamicPaintBrushSettings *brush = pmd2->brush;
 536
 537                                 if (brush->flags & MOD_DPAINT_USES_VELOCITY)
 538                                         flags |= BRUSH_USES_VELOCITY;
 539                         }
 540                 }
 541         }
 542
 543         return flags;
 544 }
 545
 546 static int brush_usesMaterial(DynamicPaintBrushSettings *brush, Scene *scene)
 547 {
 548         return ((brush->flags & MOD_DPAINT_USE_MATERIAL) && (!strcmp(scene->r.engine, "BLENDER_RENDER")));
 549 }
 550
 551 /* check whether two bounds intersect */
 552 static int boundsIntersect(Bounds3D *b1, Bounds3D *b2)
 553 {
 554         int i=2;
 555         if (!b1->valid || !b2->valid) return 0;
 556         for (; i>=0; i-=1)
 557                 if (!(b1->min[i] <= b2->max[i] && b1->max[i] >= b2->min[i])) return 0;
 558         return 1;
 559 }
 560
 561 /* check whether two bounds intersect inside defined proximity */
 562 static int boundsIntersectDist(Bounds3D *b1, Bounds3D *b2, float dist)
 563 {
 564         int i=2;
 565         if (!b1->valid || !b2->valid) return 0;
 566         for (; i>=0; i-=1)
 567                 if (!(b1->min[i] <= (b2->max[i]+dist) && b1->max[i] >= (b2->min[i]-dist))) return 0;
 568         return 1;
 569 }
 570
 571 /* check whether bounds intersects a point with given radius */
 572 static int boundIntersectPoint(Bounds3D *b, float point[3], float radius)
 573 {
 574         int i=2;
 575         if (!b->valid) return 0;
 576         for (; i>=0; i-=1)
 577                 if (!(b->min[i] <= (point[i]+radius) && b->max[i] >= (point[i]-radius))) return 0;
 578         return 1;
 579 }
 580
 581 /* expand bounds by a new point */
 582 static void boundInsert(Bounds3D *b, float point[3])
 583 {
 584         int i=2;
 585         if (!b->valid) {
 586                 copy_v3_v3(b->min, point);
 587                 copy_v3_v3(b->max, point);
 588                 b->valid = 1;
 589         }
 590         else {
 591                 for (; i>=0; i-=1) {
 592                         if (point[i] < b->min[i]) b->min[i]=point[i];
 593                         if (point[i] > b->max[i]) b->max[i]=point[i];
 594                 }
 595         }
 596 }
 597
 598 static void freeGrid(PaintSurfaceData *data)
 599 {
 600         PaintBakeData *bData = data->bData;
 601         VolumeGrid *grid = bData->grid;
 602
 603         if (grid->bounds) MEM_freeN(grid->bounds);
 604         if (grid->s_pos) MEM_freeN(grid->s_pos);
 605         if (grid->s_num) MEM_freeN(grid->s_num);
 606         if (grid->t_index) MEM_freeN(grid->t_index);
 607
 608         MEM_freeN(bData->grid);
 609         bData->grid = NULL;
 610 }
 611
 612 static void surfaceGenerateGrid(struct DynamicPaintSurface *surface)
 613 {
 614         PaintSurfaceData *sData = surface->data;
 615         PaintBakeData *bData = sData->bData;
 616         Bounds3D *grid_bounds;
 617         VolumeGrid *grid;
 618         int grid_cells, axis = 3;
 619         int *temp_t_index = NULL;
 620         int *temp_s_num = NULL;
 621
 622 #ifdef _OPENMP
 623         int num_of_threads = omp_get_max_threads();
 624 #else
 625         int num_of_threads = 1;
 626 #endif
 627
 628         if (bData->grid)
 629                 freeGrid(sData);
 630
 631         /* allocate separate bounds for each thread */
 632         grid_bounds = MEM_callocN(sizeof(Bounds3D)*num_of_threads, "Grid Bounds");
 633         bData->grid = MEM_callocN(sizeof(VolumeGrid), "Surface Grid");
 634         grid = bData->grid;
 635
 636         if (grid && grid_bounds) {
 637                 int i, error = 0;
 638                 float dim_factor, volume, dim[3];
 639                 float td[3];
 640                 float min_dim;
 641
 642                 /* calculate canvas dimensions */
 643                 #pragma omp parallel for schedule(static)
 644                 for (i=0; i<sData->total_points; i++) {
 645                         #ifdef _OPENMP
 646                         int id = omp_get_thread_num();
 647                         boundInsert(&grid_bounds[id], (bData->realCoord[bData->s_pos[i]].v));
 648                         #else
 649                         boundInsert(&grid_bounds[0], (bData->realCoord[bData->s_pos[i]].v));
 650                         #endif
 651                 }
 652
 653                 /* get final dimensions */
 654                 for (i=0; i<num_of_threads; i++) {
 655                         boundInsert(&grid->grid_bounds, grid_bounds[i].min);
 656                         boundInsert(&grid->grid_bounds, grid_bounds[i].max);
 657                 }
 658
 659                 /* get dimensions */
 660                 sub_v3_v3v3(dim, grid->grid_bounds.max, grid->grid_bounds.min);
 661                 copy_v3_v3(td, dim);
 662                 min_dim = MAX3(td[0],td[1],td[2]) / 1000.f;
 663
 664                 /* deactivate zero axises */
 665                 for (i=0; i<3; i++) {
 666                         if (td[i]<min_dim) {td[i]=1.0f; axis-=1;}
 667                 }
 668
 669                 if (axis == 0 || MAX3(td[0],td[1],td[2]) < 0.0001f) {
 670                         MEM_freeN(grid_bounds);
 671                         MEM_freeN(bData->grid);
 672                         bData->grid = NULL;
 673                         return;
 674                 }
 675
 676                 /* now calculate grid volume/area/width depending on num of active axis */
 677                 volume = td[0]*td[1]*td[2];
 678
 679                 /* determine final grid size by trying to fit average 10.000 points per grid cell */
 680                 dim_factor = (float)pow(volume / ((double)sData->total_points / 10000.0), 1.0/(double)axis);
 681
 682                 /* define final grid size using dim_factor, use min 3 for active axises */
 683                 for (i=0; i<3; i++) {
 684                         grid->dim[i] = (int)floor(td[i] / dim_factor);
 685                         CLAMP(grid->dim[i], (dim[i]>=min_dim) ? 3 : 1, 100);
 686                 }
 687                 grid_cells = grid->dim[0]*grid->dim[1]*grid->dim[2];
 688
 689                 /* allocate memory for grids */
 690                 grid->bounds = MEM_callocN(sizeof(Bounds3D) * grid_cells, "Surface Grid Bounds");
 691                 grid->s_pos = MEM_callocN(sizeof(int) * grid_cells, "Surface Grid Position");
 692                 grid->s_num = MEM_callocN(sizeof(int) * grid_cells*num_of_threads, "Surface Grid Points");
 693                 temp_s_num = MEM_callocN(sizeof(int) * grid_cells, "Temp Surface Grid Points");
 694                 grid->t_index = MEM_callocN(sizeof(int) * sData->total_points, "Surface Grid Target Ids");
 695                 temp_t_index = MEM_callocN(sizeof(int) * sData->total_points, "Temp Surface Grid Target Ids");
 696
 697                 /* in case of an allocation failture abort here */
 698                 if (!grid->bounds || !grid->s_pos || !grid->s_num || !grid->t_index || !temp_s_num || !temp_t_index)
 699                         error = 1;
 700
 701                 if (!error) {
 702                         /* calculate number of points withing each cell */
 703                         #pragma omp parallel for schedule(static)
 704                         for (i=0; i<sData->total_points; i++) {
 705                                 int co[3], j;
 706                                 for (j=0; j<3; j++) {
 707                                         co[j] = (int)floor((bData->realCoord[bData->s_pos[i]].v[j] - grid->grid_bounds.min[j])/dim[j]*grid->dim[j]);
 708                                         CLAMP(co[j], 0, grid->dim[j]-1);
 709                                 }
 710
 711                                 temp_t_index[i] = co[0] + co[1] * grid->dim[0] + co[2] * grid->dim[0]*grid->dim[1];
 712                                 #ifdef _OPENMP
 713                                 grid->s_num[temp_t_index[i]+omp_get_thread_num()*grid_cells]++;
 714                                 #else
 715                                 grid->s_num[temp_t_index[i]]++;
 716                                 #endif
 717                         }
 718
 719                         /* for first cell only calc s_num */
 720                         for (i=1; i<num_of_threads; i++) {
 721                                 grid->s_num[0] += grid->s_num[i*grid_cells];
 722                         }
 723
 724                         /* calculate grid indexes */
 725                         for (i=1; i<grid_cells; i++) {
 726                                 int id;
 727                                 for (id=1; id<num_of_threads; id++) {
 728                                         grid->s_num[i] += grid->s_num[i+id*grid_cells];
 729                                 }
 730                                 grid->s_pos[i] = grid->s_pos[i-1] + grid->s_num[i-1];
 731                         }
 732
 733                         /* save point indexes to final array */
 734                         for (i=0; i<sData->total_points; i++) {
 735                                 int pos = grid->s_pos[temp_t_index[i]] + temp_s_num[temp_t_index[i]];
 736                                 grid->t_index[pos] = i;
 737
 738                                 temp_s_num[temp_t_index[i]]++;
 739                         }
 740
 741                         /* calculate cell bounds */
 742                         {
 743                                 int x;
 744                                 #pragma omp parallel for schedule(static)
 745                                 for (x=0; x<grid->dim[0]; x++) {
 746                                         int y;
 747                                         for (y=0; y<grid->dim[1]; y++) {
 748                                                 int z;
 749                                                 for (z=0; z<grid->dim[2]; z++) {
 750                                                         int j, b_index = x + y * grid->dim[0] + z * grid->dim[0]*grid->dim[1];
 751                                                         /* set bounds */
 752                                                         for (j=0; j<3; j++) {
 753                                                                 int s = (j==0) ? x : ((j==1) ? y : z);
 754                                                                 grid->bounds[b_index].min[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*s;
 755                                                                 grid->bounds[b_index].max[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*(s+1);
 756                                                         }
 757                                                         grid->bounds[b_index].valid = 1;
 758                                                 }
 759                                         }
 760                                 }
 761                         }
 762                 }
 763
 764                 if (temp_s_num) MEM_freeN(temp_s_num);
 765                 if (temp_t_index) MEM_freeN(temp_t_index);
 766
 767                 /* free per thread s_num values */
 768                 grid->s_num = MEM_reallocN(grid->s_num, sizeof(int) * grid_cells);
 769
 770                 if (error || !grid->s_num) {
 771                         setError(surface->canvas, "Not enough free memory.");
 772                         freeGrid(sData);
 773                 }
 774         }
 775
 776         if (grid_bounds) MEM_freeN(grid_bounds);
 777 }
 778
 779 /***************************** Freeing data ******************************/
 780
 781 /* Free brush data */
 782 void dynamicPaint_freeBrush(struct DynamicPaintModifierData *pmd)
 783 {
 784         if(pmd->brush) {
 785                 if(pmd->brush->dm)
 786                         pmd->brush->dm->release(pmd->brush->dm);
 787                 pmd->brush->dm = NULL;
 788
 789                 if(pmd->brush->paint_ramp)
 790                          MEM_freeN(pmd->brush->paint_ramp);
 791                 pmd->brush->paint_ramp = NULL;
 792                 if(pmd->brush->vel_ramp)
 793                          MEM_freeN(pmd->brush->vel_ramp);
 794                 pmd->brush->vel_ramp = NULL;
 795
 796                 MEM_freeN(pmd->brush);
 797                 pmd->brush = NULL;
 798         }
 799 }
 800
 801 static void dynamicPaint_freeAdjData(PaintSurfaceData *data)
 802 {
 803         if (data->adj_data) {
 804                 if (data->adj_data->n_index) MEM_freeN(data->adj_data->n_index);
 805                 if (data->adj_data->n_num) MEM_freeN(data->adj_data->n_num);
 806                 if (data->adj_data->n_target) MEM_freeN(data->adj_data->n_target);
 807                 if (data->adj_data->flags) MEM_freeN(data->adj_data->flags);
 808                 MEM_freeN(data->adj_data);
 809                 data->adj_data = NULL;
 810         }
 811 }
 812
 813 static void free_bakeData(PaintSurfaceData *data)
 814 {
 815         PaintBakeData *bData = data->bData;
 816         if (bData) {
 817                 if (bData->bNormal) MEM_freeN(bData->bNormal);
 818                 if (bData->s_pos) MEM_freeN(bData->s_pos);
 819                 if (bData->s_num) MEM_freeN(bData->s_num);
 820                 if (bData->realCoord) MEM_freeN(bData->realCoord);
 821                 if (bData->bNeighs) MEM_freeN(bData->bNeighs);
 822                 if (bData->grid) freeGrid(data);
 823                 if (bData->prev_verts) MEM_freeN(bData->prev_verts);
 824                 if (bData->velocity) MEM_freeN(bData->velocity);
 825                 if (bData->prev_velocity) MEM_freeN(bData->prev_velocity);
 826
 827                 MEM_freeN(data->bData);
 828                 data->bData = NULL;
 829         }
 830 }
 831
 832 /* free surface data if it's not used anymore */
 833 void surface_freeUnusedData(DynamicPaintSurface *surface)
 834 {
 835         if (!surface->data) return;
 836
 837         /* free bakedata if not active or surface is baked */
 838         if (!(surface->flags & MOD_DPAINT_ACTIVE) ||
 839                 (surface->pointcache && surface->pointcache->flag & PTCACHE_BAKED))
 840                 free_bakeData(surface->data);
 841 }
 842
 843 void dynamicPaint_freeSurfaceData(DynamicPaintSurface *surface)
 844 {
 845         PaintSurfaceData *data = surface->data;
 846         if (!data) return;
 847         if (data->format_data) {
 848                 /* format specific free */
 849                 if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
 850                         ImgSeqFormatData *format_data = (ImgSeqFormatData*)data->format_data;
 851                         if (format_data->uv_p)
 852                                 MEM_freeN(format_data->uv_p);
 853                         if (format_data->barycentricWeights)
 854                                 MEM_freeN(format_data->barycentricWeights);
 855                 }
 856                 MEM_freeN(data->format_data);
 857         }
 858         /* type data */
 859         if (data->type_data) MEM_freeN(data->type_data);
 860         dynamicPaint_freeAdjData(data);
 861         /* bake data */
 862         free_bakeData(data);
 863
 864         MEM_freeN(surface->data);
 865         surface->data = NULL;
 866 }
 867
 868 void dynamicPaint_freeSurface(DynamicPaintSurface *surface)
 869 {
 870         /* point cache */
 871         BKE_ptcache_free_list(&(surface->ptcaches));
 872         surface->pointcache = NULL;
 873
 874         if(surface->effector_weights)
 875                 MEM_freeN(surface->effector_weights);
 876         surface->effector_weights = NULL;
 877
 878         BLI_remlink(&(surface->canvas->surfaces), surface);
 879         dynamicPaint_freeSurfaceData(surface);
 880         MEM_freeN(surface);
 881 }
 882
 883 /* Free canvas data */
 884 void dynamicPaint_freeCanvas(DynamicPaintModifierData *pmd)
 885 {
 886         if(pmd->canvas) {
 887                 /* Free surface data */
 888                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
 889                 DynamicPaintSurface *next_surface = NULL;
 890
 891                 while (surface) {
 892                         next_surface = surface->next;
 893                         dynamicPaint_freeSurface(surface);
 894                         surface = next_surface;
 895                 }
 896
 897                 /* free dm copy */
 898                 if (pmd->canvas->dm)
 899                         pmd->canvas->dm->release(pmd->canvas->dm);
 900                 pmd->canvas->dm = NULL;
 901
 902                 MEM_freeN(pmd->canvas);
 903                 pmd->canvas = NULL;
 904         }
 905 }
 906
 907 /* Free whole dp modifier */
 908 void dynamicPaint_Modifier_free(struct DynamicPaintModifierData *pmd)
 909 {
 910         if(pmd) {
 911                 dynamicPaint_freeCanvas(pmd);
 912                 dynamicPaint_freeBrush(pmd);
 913         }
 914 }
 915
 916
 917 /***************************** Initialize and reset ******************************/
 918
 919 /*
 920 *       Creates a new surface and adds it to the list
 921 *       If scene is null, frame range of 1-250 is used
 922 *       A pointer to this surface is returned
 923 */
 924 struct DynamicPaintSurface *dynamicPaint_createNewSurface(DynamicPaintCanvasSettings *canvas, Scene *scene)
 925 {
 926         DynamicPaintSurface *surface= MEM_callocN(sizeof(DynamicPaintSurface), "DynamicPaintSurface");
 927         if (!surface) return NULL;
 928
 929         surface->canvas = canvas;
 930         surface->format = MOD_DPAINT_SURFACE_F_VERTEX;
 931         surface->type = MOD_DPAINT_SURFACE_T_PAINT;
 932
 933         /* cache */
 934         surface->pointcache = BKE_ptcache_add(&(surface->ptcaches));
 935         surface->pointcache->flag |= PTCACHE_DISK_CACHE;
 936         surface->pointcache->step = 1;
 937
 938         /* Set initial values */
 939         surface->flags = MOD_DPAINT_ANTIALIAS | MOD_DPAINT_MULALPHA | MOD_DPAINT_DRY_LOG | MOD_DPAINT_DISSOLVE_LOG |
 940                                          MOD_DPAINT_ACTIVE | MOD_DPAINT_PREVIEW | MOD_DPAINT_OUT1;
 941         surface->effect = 0;
 942         surface->effect_ui = 1;
 943
 944         surface->diss_speed = 250;
 945         surface->dry_speed = 500;
 946         surface->depth_clamp = 0.0f;
 947         surface->disp_factor = 1.0f;
 948         surface->disp_type = MOD_DPAINT_DISP_DISPLACE;
 949         surface->image_fileformat = MOD_DPAINT_IMGFORMAT_PNG;
 950
 951         surface->init_color[0] = 1.0f;
 952         surface->init_color[1] = 1.0f;
 953         surface->init_color[2] = 1.0f;
 954         surface->init_color[3] = 1.0f;
 955
 956         surface->image_resolution = 256;
 957         surface->substeps = 0;
 958
 959         if (scene) {
 960                 surface->start_frame = scene->r.sfra;
 961                 surface->end_frame = scene->r.efra;
 962         }
 963         else {
 964                 surface->start_frame = 1;
 965                 surface->end_frame = 250;
 966         }
 967
 968         surface->spread_speed = 1.0f;
 969         surface->color_spread_speed = 1.0f;
 970         surface->shrink_speed = 1.0f;
 971
 972         surface->wave_damping = 0.05f;
 973         surface->wave_speed = 1.0f;
 974         surface->wave_timescale = 1.0f;
 975         surface->wave_spring = 0.20f;
 976
 977         BLI_snprintf(surface->image_output_path, sizeof(surface->image_output_path), "%sdynamicpaint", U.textudir);
 978         BLI_cleanup_dir(NULL, surface->image_output_path);
 979         dynamicPaintSurface_setUniqueName(surface, "Surface");
 980
 981         surface->effector_weights = BKE_add_effector_weights(NULL);
 982
 983         dynamicPaintSurface_updateType(surface);
 984
 985         BLI_addtail(&canvas->surfaces, surface);
 986
 987         return surface;
 988 }
 989
 990 /*
 991 *       Initialize modifier data
 992 */
 993 int dynamicPaint_createType(struct DynamicPaintModifierData *pmd, int type, struct Scene *scene)
 994 {
 995         if(pmd) {
 996                 if(type == MOD_DYNAMICPAINT_TYPE_CANVAS) {
 997                         DynamicPaintCanvasSettings *canvas;
 998                         if(pmd->canvas)
 999                                 dynamicPaint_freeCanvas(pmd);
1000
1001                         canvas = pmd->canvas = MEM_callocN(sizeof(DynamicPaintCanvasSettings), "DynamicPaint Canvas");
1002                         if (!canvas)
1003                                 return 0;
1004                         canvas->pmd = pmd;
1005                         canvas->dm = NULL;
1006
1007                         /* Create one surface */
1008                         if (!dynamicPaint_createNewSurface(canvas, scene))
1009                                 return 0;
1010
1011                 }
1012                 else if(type == MOD_DYNAMICPAINT_TYPE_BRUSH) {
1013                         DynamicPaintBrushSettings *brush;
1014                         if(pmd->brush)
1015                                 dynamicPaint_freeBrush(pmd);
1016
1017                         brush = pmd->brush = MEM_callocN(sizeof(DynamicPaintBrushSettings), "DynamicPaint Paint");
1018                         if (!brush)
1019                                 return 0;
1020                         brush->pmd = pmd;
1021
1022                         brush->psys = NULL;
1023
1024                         brush->flags = MOD_DPAINT_ABS_ALPHA | MOD_DPAINT_RAMP_ALPHA;
1025                         brush->collision = MOD_DPAINT_COL_VOLUME;
1026
1027                         brush->mat = NULL;
1028                         brush->r = 0.15f;
1029                         brush->g = 0.4f;
1030                         brush->b = 0.8f;
1031                         brush->alpha = 1.0f;
1032                         brush->wetness = 1.0f;
1033
1034                         brush->paint_distance = 1.0f;
1035                         brush->proximity_falloff = MOD_DPAINT_PRFALL_SMOOTH;
1036
1037                         brush->particle_radius = 0.2f;
1038                         brush->particle_smooth = 0.05f;
1039
1040                         brush->wave_factor = 1.0f;
1041                         brush->wave_clamp = 0.0f;
1042                         brush->smudge_strength = 0.3f;
1043                         brush->max_velocity = 1.0f;
1044
1045                         brush->dm = NULL;
1046
1047                         /* Paint proximity falloff colorramp. */
1048                         {
1049                                 CBData *ramp;
1050
1051                                 brush->paint_ramp = add_colorband(0);
1052                                 if (!brush->paint_ramp)
1053                                         return 0;
1054                                 ramp = brush->paint_ramp->data;
1055                                 /* Add default smooth-falloff ramp.     */
1056                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = 1.0f;
1057                                 ramp[0].pos = 0.0f;
1058                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].pos = 1.0f;
1059                                 ramp[1].a = 0.0f;
1060                                 pmd->brush->paint_ramp->tot = 2;
1061                         }
1062
1063                         /* Brush velocity ramp. */
1064                         {
1065                                 CBData *ramp;
1066
1067                                 brush->vel_ramp = add_colorband(0);
1068                                 if (!brush->vel_ramp)
1069                                         return 0;
1070                                 ramp = brush->vel_ramp->data;
1071                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = ramp[0].pos = 0.0f;
1072                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].a = ramp[1].pos = 1.0f;
1073                                 brush->paint_ramp->tot = 2;
1074                         }
1075                 }
1076         }
1077         else
1078                 return 0;
1079
1080         return 1;
1081 }
1082
1083 void dynamicPaint_Modifier_copy(struct DynamicPaintModifierData *pmd, struct DynamicPaintModifierData *tpmd)
1084 {
1085         /* Init modifier        */
1086         tpmd->type = pmd->type;
1087         if (pmd->canvas)
1088                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_CANVAS, NULL);
1089         if (pmd->brush)
1090                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_BRUSH, NULL);
1091
1092         /* Copy data    */
1093         if (tpmd->canvas) {
1094                 tpmd->canvas->pmd = tpmd;
1095
1096         } else if (tpmd->brush) {
1097                 DynamicPaintBrushSettings *brush = pmd->brush, *t_brush = tpmd->brush;
1098                 t_brush->pmd = tpmd;
1099
1100                 t_brush->flags = brush->flags;
1101                 t_brush->collision = brush->collision;
1102
1103                 t_brush->mat = brush->mat;
1104                 t_brush->r = brush->r;
1105                 t_brush->g = brush->g;
1106                 t_brush->b = brush->b;
1107                 t_brush->alpha = brush->alpha;
1108                 t_brush->wetness = brush->wetness;
1109
1110                 t_brush->particle_radius = brush->particle_radius;
1111                 t_brush->particle_smooth = brush->particle_smooth;
1112                 t_brush->paint_distance = brush->paint_distance;
1113                 t_brush->psys = brush->psys;
1114
1115                 if (brush->paint_ramp)
1116                         memcpy(t_brush->paint_ramp, brush->paint_ramp, sizeof(ColorBand));
1117                 if (brush->vel_ramp)
1118                         memcpy(t_brush->vel_ramp, brush->vel_ramp, sizeof(ColorBand));
1119
1120                 t_brush->proximity_falloff = brush->proximity_falloff;
1121                 t_brush->wave_type = brush->wave_type;
1122                 t_brush->ray_dir = brush->ray_dir;
1123
1124                 t_brush->wave_factor = brush->wave_factor;
1125                 t_brush->wave_clamp = brush->wave_clamp;
1126                 t_brush->max_velocity = brush->max_velocity;
1127                 t_brush->smudge_strength = brush->smudge_strength;
1128         }
1129 }
1130
1131 /* allocates surface data depending on surface type */
1132 static void dynamicPaint_allocateSurfaceType(DynamicPaintSurface *surface)
1133 {
1134         PaintSurfaceData *sData = surface->data;
1135
1136         switch (surface->type) {
1137                 case MOD_DPAINT_SURFACE_T_PAINT:
1138                         sData->type_data = MEM_callocN(sizeof(PaintPoint)*sData->total_points, "DynamicPaintSurface Data");
1139                         break;
1140                 case MOD_DPAINT_SURFACE_T_DISPLACE:
1141                         sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface DepthData");
1142                         break;
1143                 case MOD_DPAINT_SURFACE_T_WEIGHT:
1144                         sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface WeightData");
1145                         break;
1146                 case MOD_DPAINT_SURFACE_T_WAVE:
1147                         sData->type_data = MEM_callocN(sizeof(PaintWavePoint)*sData->total_points, "DynamicPaintSurface WaveData");
1148                         break;
1149         }
1150
1151         if (sData->type_data == NULL) setError(surface->canvas, "Not enough free memory!");
1152 }
1153
1154 static int surface_usesAdjDistance(DynamicPaintSurface *surface)
1155 {
1156         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT && surface->effect) return 1;
1157         if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 1;
1158         return 0;
1159 }
1160
1161 static int surface_usesAdjData(DynamicPaintSurface *surface)
1162 {
1163         if (surface_usesAdjDistance(surface)) return 1;
1164         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
1165                 surface->flags & MOD_DPAINT_ANTIALIAS) return 1;
1166
1167         return 0;
1168 }
1169
1170 /* initialize surface adjacency data */
1171 static void dynamicPaint_initAdjacencyData(DynamicPaintSurface *surface, int force_init)
1172 {
1173         PaintSurfaceData *sData = surface->data;
1174         PaintAdjData *ed;
1175         int *temp_data;
1176         int neigh_points = 0;
1177
1178         if (!surface_usesAdjData(surface) && !force_init) return;
1179
1180         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1181                 /* For vertex format, neighbours are connected by edges */
1182                 neigh_points = 2*surface->canvas->dm->getNumEdges(surface->canvas->dm);
1183         }
1184         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ)
1185                 neigh_points = sData->total_points*8;
1186
1187         if (!neigh_points) return;
1188
1189         /* allocate memory */
1190         ed = sData->adj_data = MEM_callocN(sizeof(PaintAdjData), "Surface Adj Data");
1191         if (!ed) return;
1192         ed->n_index = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Index");
1193         ed->n_num = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Counts");
1194         temp_data = MEM_callocN(sizeof(int)*sData->total_points, "Temp Adj Data");
1195         ed->n_target = MEM_callocN(sizeof(int)*neigh_points, "Surface Adj Targets");
1196         ed->flags = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Flags");
1197         ed->total_targets = neigh_points;
1198
1199         /* in case of allocation error, free memory */
1200         if (!ed->n_index || !ed->n_num || !ed->n_target || !temp_data) {
1201                 dynamicPaint_freeAdjData(sData);
1202                 if (temp_data) MEM_freeN(temp_data);
1203                 setError(surface->canvas, "Not enough free memory.");
1204                 return;
1205         }
1206
1207         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1208                 int i;
1209                 int n_pos;
1210
1211                 /* For vertex format, count every vertex that is connected by an edge */
1212                 int numOfEdges = surface->canvas->dm->getNumEdges(surface->canvas->dm);
1213                 int numOfFaces = surface->canvas->dm->getNumFaces(surface->canvas->dm);
1214                 struct MEdge *edge =  surface->canvas->dm->getEdgeArray(surface->canvas->dm);
1215                 struct MFace *face =  surface->canvas->dm->getFaceArray(surface->canvas->dm);
1216
1217                 /* count number of edges per vertex */
1218                 for (i=0; i<numOfEdges; i++) {
1219                         ed->n_num[edge[i].v1]++;
1220                         ed->n_num[edge[i].v2]++;
1221
1222                         temp_data[edge[i].v1]++;
1223                         temp_data[edge[i].v2]++;
1224                 }
1225
1226                 /* to locate points on "mesh edge" */
1227                 for (i=0; i<numOfFaces; i++) {
1228                         temp_data[face[i].v1]++;
1229                         temp_data[face[i].v2]++;
1230                         temp_data[face[i].v3]++;
1231                         if (face[i].v4)
1232                                 temp_data[face[i].v4]++;
1233                 }
1234
1235                 /* now check if total number of edges+faces for
1236                 *  each vertex is even, if not -> vertex is on mesh edge */
1237                 for (i=0; i<sData->total_points; i++) {
1238                         if ((temp_data[i]%2) ||
1239                                 temp_data[i] < 4)
1240                                 ed->flags[i] |= ADJ_ON_MESH_EDGE;
1241
1242                         /* reset temp data */
1243                         temp_data[i] = 0;
1244                 }
1245
1246                 /* order n_index array */
1247                 n_pos = 0;
1248                 for (i=0; i<sData->total_points; i++) {
1249                         ed->n_index[i] = n_pos;
1250                         n_pos += ed->n_num[i];
1251                 }
1252
1253                 /* and now add neighbour data using that info */
1254                 for (i=0; i<numOfEdges; i++) {
1255                         /* first vertex */
1256                         int index = edge[i].v1;
1257                         n_pos = ed->n_index[index]+temp_data[index];
1258                         ed->n_target[n_pos] = edge[i].v2;
1259                         temp_data[index]++;
1260
1261                         /* second vertex */
1262                         index = edge[i].v2;
1263                         n_pos = ed->n_index[index]+temp_data[index];
1264                         ed->n_target[n_pos] = edge[i].v1;
1265                         temp_data[index]++;
1266                 }
1267         }
1268         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1269                 /* for image sequences, only allocate memory.
1270                 *  bake initialization takes care of rest */
1271         }
1272
1273         MEM_freeN(temp_data);
1274 }
1275
1276 void dynamicPaint_setInitialColor(DynamicPaintSurface *surface)
1277 {
1278         PaintSurfaceData *sData = surface->data;
1279         PaintPoint* pPoint = (PaintPoint*)sData->type_data;
1280         DerivedMesh *dm = surface->canvas->dm;
1281         int i;
1282
1283         if (surface->type != MOD_DPAINT_SURFACE_T_PAINT)
1284                 return;
1285
1286         if (surface->init_color_type == MOD_DPAINT_INITIAL_NONE)
1287                 return;
1288         /* Single color */
1289         else if (surface->init_color_type == MOD_DPAINT_INITIAL_COLOR) {
1290                 /* apply color to every surface point */
1291                 #pragma omp parallel for schedule(static)
1292                 for (i=0; i<sData->total_points; i++) {
1293                         copy_v3_v3(pPoint[i].color, surface->init_color);
1294                         pPoint[i].alpha = surface->init_color[3];
1295                 }
1296         }
1297         /* UV mapped texture */
1298         else if (surface->init_color_type == MOD_DPAINT_INITIAL_TEXTURE) {
1299                 Tex *tex = surface->init_texture;
1300                 MTFace *tface;
1301                 MFace *mface = dm->getFaceArray(dm);
1302                 int numOfFaces = dm->getNumFaces(dm);
1303                 char uvname[40];
1304
1305                 if (!tex) return;
1306
1307                 /* get uv layer */
1308                 CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->init_layername, uvname);
1309                 tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1310                 if (!tface) return;
1311
1312                 /* for vertex surface loop through tfaces and find uv color
1313                 *  that provides highest alpha */
1314                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1315                         #pragma omp parallel for schedule(static)
1316                         for (i=0; i<numOfFaces; i++) {
1317                                 int numOfVert = (mface[i].v4) ? 4 : 3;
1318                                 float uv[3] = {0.0f};
1319                                 int j;
1320                                 for (j=0; j<numOfVert; j++) {
1321                                         TexResult texres = {0};
1322                                         unsigned int *vert = (&mface[i].v1)+j;
1323
1324                                         /* remap to -1.0 to 1.0 */
1325                                         uv[0] = tface[i].uv[j][0]*2.0f - 1.0f;
1326                                         uv[1] = tface[i].uv[j][1]*2.0f - 1.0f;
1327
1328                                         multitex_ext_safe(tex, uv, &texres);
1329
1330                                         if (texres.tin > pPoint[*vert].alpha) {
1331                                                 copy_v3_v3(pPoint[*vert].color, &texres.tr);
1332                                                 pPoint[*vert].alpha = texres.tin;
1333                                         }
1334                                 }
1335                         }
1336                 }
1337                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1338                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
1339                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1340
1341                         #pragma omp parallel for schedule(static)
1342                         for (i=0; i<sData->total_points; i++) {
1343                                 float uv[9] = {0.0f};
1344                                 float uv_final[3] = {0.0f};
1345                                 int j;
1346                                 TexResult texres = {0};
1347
1348                                 /* collect all uvs */
1349                                 for (j=0; j<3; j++) {
1350                                         int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j;
1351                                         copy_v2_v2(&uv[j*3], tface[f_data->uv_p[i].face_index].uv[v]);
1352                                 }
1353
1354                                 /* interpolate final uv pos */
1355                                 interp_v3_v3v3v3(       uv_final, &uv[0], &uv[3], &uv[6],
1356                                         f_data->barycentricWeights[i*samples].v);
1357                                 /* remap to -1.0 to 1.0 */
1358                                 uv_final[0] = uv_final[0]*2.0f - 1.0f;
1359                                 uv_final[1] = uv_final[1]*2.0f - 1.0f;
1360
1361                                 multitex_ext_safe(tex, uv_final, &texres);
1362
1363                                 /* apply color */
1364                                 copy_v3_v3(pPoint[i].color, &texres.tr);
1365                                 pPoint[i].alpha = texres.tin;
1366                         }
1367                 }
1368         }
1369         /* vertex color layer */
1370         else if (surface->init_color_type == MOD_DPAINT_INITIAL_VERTEXCOLOR) {
1371                 MCol *col = CustomData_get_layer_named(&dm->faceData, CD_MCOL, surface->init_layername);
1372                 if (!col) return;
1373
1374                 /* for vertex surface, just copy colors from mcol */
1375                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1376                         MFace *mface = dm->getFaceArray(dm);
1377                         int numOfFaces = dm->getNumFaces(dm);
1378
1379                         #pragma omp parallel for schedule(static)
1380                         for (i=0; i<numOfFaces; i++) {
1381                                 int numOfVert = (mface[i].v4) ? 4 : 3;
1382                                 int j;
1383                                 for (j=0; j<numOfVert; j++) {
1384                                         unsigned int *vert = ((&mface[i].v1)+j);
1385
1386                                         pPoint[*vert].color[0] = 1.0f/255.f*(float)col[i*4+j].b;
1387                                         pPoint[*vert].color[1] = 1.0f/255.f*(float)col[i*4+j].g;
1388                                         pPoint[*vert].color[2] = 1.0f/255.f*(float)col[i*4+j].r;
1389                                         pPoint[*vert].alpha = 1.0f/255.f*(float)col[i*4+j].a;
1390                                 }
1391                         }
1392                 }
1393                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1394                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
1395                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1396
1397                         #pragma omp parallel for schedule(static)
1398                         for (i=0; i<sData->total_points; i++) {
1399                                 int face_ind = f_data->uv_p[i].face_index;
1400                                 float colors[3][4] = {{0.0f,0.0f,0.0f,0.0f}};
1401                                 float final_color[4];
1402                                 int j;
1403                                 /* collect color values */
1404                                 for (j=0; j<3; j++) {
1405                                         int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j;
1406                                         colors[j][0] = 1.0f/255.f*(float)col[face_ind*4+v].b;
1407                                         colors[j][1] = 1.0f/255.f*(float)col[face_ind*4+v].g;
1408                                         colors[j][2] = 1.0f/255.f*(float)col[face_ind*4+v].r;
1409                                         colors[j][3] = 1.0f/255.f*(float)col[face_ind*4+v].a;
1410                                 }
1411
1412                                 /* interpolate final color */
1413                                 interp_v4_v4v4v4(       final_color, colors[0], colors[1], colors[2],
1414                                                 f_data->barycentricWeights[i*samples].v);
1415
1416                                 copy_v3_v3(pPoint[i].color, final_color);
1417                                 pPoint[i].alpha = final_color[3];
1418                         }
1419                 }
1420         }
1421 }
1422
1423 /* clears surface data back to zero */
1424 void dynamicPaint_clearSurface(DynamicPaintSurface *surface)
1425 {
1426         PaintSurfaceData *sData = surface->data;
1427         if (sData && sData->type_data) {
1428                 unsigned int data_size;
1429
1430                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1431                         data_size = sizeof(PaintPoint);
1432                 else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE)
1433                         data_size = sizeof(PaintWavePoint);
1434                 else
1435                         data_size = sizeof(float);
1436
1437                 memset(sData->type_data, 0, data_size * sData->total_points);
1438
1439                 /* set initial color */
1440                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1441                         dynamicPaint_setInitialColor(surface);
1442
1443                 if (sData->bData)
1444                         sData->bData->clear = 1;
1445         }
1446 }
1447
1448 /* completely (re)initializes surface (only for point cache types)*/
1449 int dynamicPaint_resetSurface(DynamicPaintSurface *surface)
1450 {
1451         int numOfPoints = dynamicPaint_surfaceNumOfPoints(surface);
1452         /* dont touch image sequence types. they get handled only on bake */
1453         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 1;
1454
1455         if (surface->data) dynamicPaint_freeSurfaceData(surface);
1456         if (numOfPoints < 1) return 0;
1457
1458         /* allocate memory */
1459         surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
1460         if (!surface->data) return 0;
1461
1462         /* allocate data depending on surface type and format */
1463         surface->data->total_points = numOfPoints;
1464         dynamicPaint_allocateSurfaceType(surface);
1465         dynamicPaint_initAdjacencyData(surface, 0);
1466
1467         /* set initial color */
1468         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1469                 dynamicPaint_setInitialColor(surface);
1470
1471         return 1;
1472 }
1473
1474 /* make sure allocated surface size matches current requirements */
1475 static void dynamicPaint_checkSurfaceData(DynamicPaintSurface *surface)
1476 {
1477         if (!surface->data || ((dynamicPaint_surfaceNumOfPoints(surface) != surface->data->total_points))) {
1478                 dynamicPaint_resetSurface(surface);
1479         }
1480 }
1481
1482
1483 /***************************** Modifier processing ******************************/
1484
1485
1486 /* apply displacing vertex surface to the derived mesh */
1487 static void dynamicPaint_applySurfaceDisplace(DynamicPaintSurface *surface, DerivedMesh *result, int update_normals)
1488 {
1489         PaintSurfaceData *sData = surface->data;
1490
1491         if (!sData || surface->format != MOD_DPAINT_SURFACE_F_VERTEX) return;
1492
1493         /* displace paint */
1494         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
1495                 MVert *mvert = result->getVertArray(result);
1496                 int i;
1497                 float* value = (float*)sData->type_data;
1498
1499                 #pragma omp parallel for schedule(static)
1500                 for (i=0; i<sData->total_points; i++) {
1501                         float normal[3], val=value[i]*surface->disp_factor;
1502                         normal_short_to_float_v3(normal, mvert[i].no);
1503                         normalize_v3(normal);
1504
1505                         mvert[i].co[0] -= normal[0]*val;
1506                         mvert[i].co[1] -= normal[1]*val;
1507                         mvert[i].co[2] -= normal[2]*val;
1508                 }
1509         }
1510         else return;
1511
1512         if (update_normals)
1513                 CDDM_calc_normals(result);
1514 }
1515
1516 /*
1517 *       Apply canvas data to the object derived mesh
1518 */
1519 static struct DerivedMesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd,
1520                                                        Object *ob,
1521                                                        DerivedMesh *dm)
1522 {
1523         DerivedMesh *result = CDDM_copy(dm);
1524
1525         if(pmd->canvas && !(pmd->canvas->flags & MOD_DPAINT_BAKING)) {
1526
1527                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
1528                 pmd->canvas->flags &= ~MOD_DPAINT_PREVIEW_READY;
1529
1530                 /* loop through surfaces */
1531                 for (; surface; surface=surface->next) {
1532                         PaintSurfaceData *sData = surface->data;
1533
1534                         if (surface && surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ && sData) {
1535                                 if (!(surface->flags & (MOD_DPAINT_ACTIVE))) continue;
1536
1537                                 /* process vertex surface previews */
1538                                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1539
1540                                         /* vertex color paint */
1541                                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
1542
1543                                                 MFace *mface = result->getFaceArray(result);
1544                                                 int numOfFaces = result->getNumFaces(result);
1545                                                 int i;
1546                                                 PaintPoint* pPoint = (PaintPoint*)sData->type_data;
1547                                                 MCol *col;
1548
1549                                                 /* paint is stored on dry and wet layers, so mix final color first */
1550                                                 float *fcolor = MEM_callocN(sizeof(float)*sData->total_points*4, "Temp paint color");
1551
1552                                                 #pragma omp parallel for schedule(static)
1553                                                 for (i=0; i<sData->total_points; i++) {
1554                                                         /* blend dry and wet layer */
1555                                                         blendColors(pPoint[i].color, pPoint[i].alpha, pPoint[i].e_color, pPoint[i].e_alpha, &fcolor[i*4]);
1556                                                 }
1557
1558                                                 /* viewport preview */
1559                                                 if (surface->flags & MOD_DPAINT_PREVIEW) {
1560                                                         /* Save preview results to weight layer, to be
1561                                                         *   able to share same drawing methods */
1562                                                         col = result->getFaceDataArray(result, CD_WEIGHT_MCOL);
1563                                                         if (!col) col = CustomData_add_layer(&result->faceData, CD_WEIGHT_MCOL, CD_CALLOC, NULL, numOfFaces);
1564
1565                                                         if (col) {
1566                                                                 #pragma omp parallel for schedule(static)
1567                                                                 for (i=0; i<numOfFaces; i++) {
1568                                                                         int j=0;
1569                                                                         Material *material = give_current_material(ob, mface[i].mat_nr+1);
1570
1571                                                                         for (; j<((mface[i].v4)?4:3); j++) {
1572                                                                                 int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4;
1573
1574                                                                                 if (surface->preview_id == MOD_DPAINT_SURFACE_PREV_PAINT) {
1575                                                                                         float c[3];
1576                                                                                         index *= 4;
1577
1578                                                                                         /* Apply material color as base vertex color for preview */
1579                                                                                         col[i*4+j].a = 255;
1580                                                                                         if (material) {
1581                                                                                                 c[0] = material->r;
1582                                                                                                 c[1] = material->g;
1583                                                                                                 c[2] = material->b;
1584                                                                                         }
1585                                                                                         else { /* default grey */
1586                                                                                                 c[0] = 0.65f;
1587                                                                                                 c[1] = 0.65f;
1588                                                                                                 c[2] = 0.65f;
1589                                                                                         }
1590                                                                                         /* mix surface color */
1591                                                                                         interp_v3_v3v3(c, c, &fcolor[index], fcolor[index+3]);
1592
1593                                                                                         col[i*4+j].r = FTOCHAR(c[2]);
1594                                                                                         col[i*4+j].g = FTOCHAR(c[1]);
1595                                                                                         col[i*4+j].b = FTOCHAR(c[0]);
1596                                                                                 }
1597                                                                                 else {
1598                                                                                         col[i*4+j].a = 255;
1599                                                                                         col[i*4+j].r = FTOCHAR(pPoint[index].wetness);
1600                                                                                         col[i*4+j].g = FTOCHAR(pPoint[index].wetness);
1601                                                                                         col[i*4+j].b = FTOCHAR(pPoint[index].wetness);
1602                                                                                 }
1603                                                                         }
1604                                                                 }
1605                                                                 pmd->canvas->flags |= MOD_DPAINT_PREVIEW_READY;
1606                                                         }
1607                                                 }
1608
1609
1610                                                 /* save layer data to output layer */
1611
1612                                                 /* paint layer */
1613                                                 col = CustomData_get_layer_named(&result->faceData, CD_MCOL, surface->output_name);
1614                                                 if (col) {
1615                                                         #pragma omp parallel for schedule(static)
1616                                                         for (i=0; i<numOfFaces; i++) {
1617                                                                 int j=0;
1618                                                                 for (; j<((mface[i].v4)?4:3); j++) {
1619                                                                         int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4;
1620                                                                         index *= 4;
1621
1622                                                                         col[i*4+j].a = FTOCHAR(fcolor[index+3]);
1623                                                                         col[i*4+j].r = FTOCHAR(fcolor[index+2]);
1624                                                                         col[i*4+j].g = FTOCHAR(fcolor[index+1]);
1625                                                                         col[i*4+j].b = FTOCHAR(fcolor[index]);
1626                                                                 }
1627                                                         }
1628                                                 }
1629
1630                                                 MEM_freeN(fcolor);
1631
1632                                                 /* wet layer */
1633                                                 col = CustomData_get_layer_named(&result->faceData, CD_MCOL, surface->output_name2);
1634                                                 if (col) {
1635                                                         #pragma omp parallel for schedule(static)
1636                                                         for (i=0; i<numOfFaces; i++) {
1637                                                                 int j=0;
1638
1639                                                                 for (; j<((mface[i].v4)?4:3); j++) {
1640                                                                         int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4;
1641                                                                         col[i*4+j].a = 255;
1642                                                                         col[i*4+j].r = FTOCHAR(pPoint[index].wetness);
1643                                                                         col[i*4+j].g = FTOCHAR(pPoint[index].wetness);
1644                                                                         col[i*4+j].b = FTOCHAR(pPoint[index].wetness);
1645                                                                 }
1646                                                         }
1647                                                 }
1648                                         }
1649                                         /* vertex group paint */
1650                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
1651                                                 int defgrp_index = defgroup_name_index(ob, surface->output_name);
1652                                                 MDeformVert *dvert = result->getVertDataArray(result, CD_MDEFORMVERT);
1653                                                 float *weight = (float*)sData->type_data;
1654                                                 /* viewport preview */
1655                                                 if (surface->flags & MOD_DPAINT_PREVIEW) {
1656                                                         /* Save preview results to weight layer, to be
1657                                                         *   able to share same drawing methods */
1658                                                         MFace *mface = result->getFaceArray(result);
1659                                                         int numOfFaces = result->getNumFaces(result);
1660                                                         int i;
1661                                                         MCol *col = result->getFaceDataArray(result, CD_WEIGHT_MCOL);
1662                                                         if (!col) col = CustomData_add_layer(&result->faceData, CD_WEIGHT_MCOL, CD_CALLOC, NULL, numOfFaces);
1663
1664                                                         if (col) {
1665                                                                 #pragma omp parallel for schedule(static)
1666                                                                 for (i=0; i<numOfFaces; i++) {
1667                                                                         float temp_color[3];
1668                                                                         int j=0;
1669                                                                         for (; j<((mface[i].v4)?4:3); j++) {
1670                                                                                 int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4;
1671
1672                                                                                 weight_to_rgb(weight[index], temp_color, temp_color+1, temp_color+2);
1673                                                                                 col[i*4+j].r = FTOCHAR(temp_color[2]);
1674                                                                                 col[i*4+j].g = FTOCHAR(temp_color[1]);
1675                                                                                 col[i*4+j].b = FTOCHAR(temp_color[0]);
1676                                                                                 col[i*4+j].a = 255;
1677                                                                         }
1678                                                                 }
1679                                                                 pmd->canvas->flags |= MOD_DPAINT_PREVIEW_READY;
1680                                                         }
1681                                                 }
1682
1683                                                 /* apply weights into a vertex group, if doesnt exists add a new layer */
1684                                                 if (defgrp_index >= 0 && !dvert && strlen(surface->output_name)>0)
1685                                                         dvert = CustomData_add_layer_named(&result->vertData, CD_MDEFORMVERT, CD_CALLOC,
1686                                                                                                                                 NULL, sData->total_points, surface->output_name);
1687                                                 if (defgrp_index >= 0 && dvert) {
1688                                                         int i;
1689                                                         for(i=0; i<sData->total_points; i++) {
1690                                                                 MDeformVert *dv= &dvert[i];
1691                                                                 MDeformWeight *def_weight = defvert_find_index(dv, defgrp_index);
1692
1693                                                                 /* skip if weight value is 0 and no existing weight is found */
1694                                                                 if (!def_weight && !weight[i])
1695                                                                         continue;
1696
1697                                                                 /* if not found, add a weight for it */
1698                                                                 if (!def_weight) {
1699                                                                         MDeformWeight *newdw = MEM_callocN(sizeof(MDeformWeight)*(dv->totweight+1),
1700                                                                                                                  "deformWeight");
1701                                                                         if(dv->dw){
1702                                                                                 memcpy(newdw, dv->dw, sizeof(MDeformWeight)*dv->totweight);
1703                                                                                 MEM_freeN(dv->dw);
1704                                                                         }
1705                                                                         dv->dw=newdw;
1706                                                                         dv->dw[dv->totweight].def_nr=defgrp_index;
1707                                                                         def_weight = &dv->dw[dv->totweight];
1708                                                                         dv->totweight++;
1709                                                                 }
1710
1711                                                                 /* set weight value */
1712                                                                 def_weight->weight = weight[i];
1713                                                         }
1714                                                 }
1715                                         }
1716                                         /* wave simulation */
1717                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
1718                                                 MVert *mvert = result->getVertArray(result);
1719                                                 int i;
1720                                                 PaintWavePoint* wPoint = (PaintWavePoint*)sData->type_data;
1721
1722                                                 #pragma omp parallel for schedule(static)
1723                                                 for (i=0; i<sData->total_points; i++) {
1724                                                         float normal[3];
1725                                                         normal_short_to_float_v3(normal, mvert[i].no);
1726                                                         normalize_v3(normal);
1727
1728                                                         mvert[i].co[0] += normal[0]*wPoint[i].height;
1729                                                         mvert[i].co[1] += normal[1]*wPoint[i].height;
1730                                                         mvert[i].co[2] += normal[2]*wPoint[i].height;
1731                                                 }
1732                                                 CDDM_calc_normals(result);
1733                                         }
1734
1735                                         /* displace */
1736                                         dynamicPaint_applySurfaceDisplace(surface, result, 1);
1737                                 }
1738                         }
1739                 }
1740         }
1741         /* make a copy of dm to use as brush data */
1742         if (pmd->brush) {
1743                 if (pmd->brush->dm) pmd->brush->dm->release(pmd->brush->dm);
1744                 pmd->brush->dm = CDDM_copy(result);
1745         }
1746
1747         return result;
1748 }
1749
1750 /* update cache frame range */
1751 void dynamicPaint_cacheUpdateFrames(DynamicPaintSurface *surface)
1752 {
1753         if (surface->pointcache) {
1754                 surface->pointcache->startframe = surface->start_frame;
1755                 surface->pointcache->endframe = surface->end_frame;
1756         }
1757 }
1758
1759 void canvas_copyDerivedMesh(DynamicPaintCanvasSettings *canvas, DerivedMesh *dm)
1760 {
1761         if (canvas->dm) canvas->dm->release(canvas->dm);
1762         canvas->dm = CDDM_copy(dm);
1763 }
1764
1765 /*
1766 *       Updates derived mesh copy and processes dynamic paint step / caches.
1767 */
1768 static void dynamicPaint_frameUpdate(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1769 {
1770         if(pmd->canvas) {
1771                 DynamicPaintCanvasSettings *canvas = pmd->canvas;
1772                 DynamicPaintSurface *surface = canvas->surfaces.first;
1773
1774                 /* update derived mesh copy */
1775                 canvas_copyDerivedMesh(canvas, dm);
1776
1777                 /* in case image sequence baking, stop here */
1778                 if (canvas->flags & MOD_DPAINT_BAKING) return;
1779
1780                 /* loop through surfaces */
1781                 for (; surface; surface=surface->next) {
1782                         int current_frame = (int)scene->r.cfra;
1783
1784                         /* free bake data if not required anymore */
1785                         surface_freeUnusedData(surface);
1786
1787                         /* image sequences are handled by bake operator */
1788                         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) continue;
1789                         if (!(surface->flags & MOD_DPAINT_ACTIVE)) continue;
1790
1791                         /* make sure surface is valid */
1792                         dynamicPaint_checkSurfaceData(surface);
1793
1794                         /* limit frame range */
1795                         CLAMP(current_frame, surface->start_frame, surface->end_frame);
1796
1797                         if (current_frame != surface->current_frame || (int)scene->r.cfra == surface->start_frame) {
1798                                 PointCache *cache = surface->pointcache;
1799                                 PTCacheID pid;
1800                                 surface->current_frame = current_frame;
1801
1802                                 /* read point cache */
1803                                 BKE_ptcache_id_from_dynamicpaint(&pid, ob, surface);
1804                                 pid.cache->startframe = surface->start_frame;
1805                                 pid.cache->endframe = surface->end_frame;
1806                                 BKE_ptcache_id_time(&pid, scene, (float)scene->r.cfra, NULL, NULL, NULL);
1807
1808                                 /* reset non-baked cache at first frame */
1809                                 if((int)scene->r.cfra == surface->start_frame && !(cache->flag & PTCACHE_BAKED))
1810                                 {
1811                                         cache->flag |= PTCACHE_REDO_NEEDED;
1812                                         BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
1813                                         cache->flag &= ~PTCACHE_REDO_NEEDED;
1814                                 }
1815
1816                                 /* try to read from cache */
1817                                 if(BKE_ptcache_read(&pid, (float)scene->r.cfra)) {
1818                                         BKE_ptcache_validate(cache, (int)scene->r.cfra);
1819                                 }
1820                                 /* if read failed and we're on surface range do recalculate */
1821                                 else if ((int)scene->r.cfra == current_frame
1822                                         && !(cache->flag & PTCACHE_BAKED)) {
1823                                         /* calculate surface frame */
1824                                         canvas->flags |= MOD_DPAINT_BAKING;
1825                                         dynamicPaint_calculateFrame(surface, scene, ob, current_frame);
1826                                         canvas->flags &= ~MOD_DPAINT_BAKING;
1827
1828                                         /* restore canvas derivedmesh if required */
1829                                         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE &&
1830                                                 surface->flags & MOD_DPAINT_DISP_INCREMENTAL && surface->next)
1831                                                 canvas_copyDerivedMesh(canvas, dm);
1832
1833                                         BKE_ptcache_validate(cache, surface->current_frame);
1834                                         BKE_ptcache_write(&pid, surface->current_frame);
1835                                 }
1836                         }
1837                 }
1838         }
1839 }
1840
1841 /* Modifier call. Processes dynamic paint modifier step. */
1842 struct DerivedMesh *dynamicPaint_Modifier_do(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1843 {
1844         /* Update canvas data for a new frame */
1845         dynamicPaint_frameUpdate(pmd, scene, ob, dm);
1846
1847         /* Return output mesh */
1848         return dynamicPaint_Modifier_apply(pmd, ob, dm);
1849 }
1850
1851
1852 /***************************** Image Sequence / UV Image Surface Calls ******************************/
1853
1854 /*
1855 *       Tries to find the neighbouring pixel in given (uv space) direction.
1856 *       Result is used by effect system to move paint on the surface.
1857 *
1858 *   px,py : origin pixel x and y
1859 *       n_index : lookup direction index (use neighX,neighY to get final index)
1860 */
1861 static int dynamicPaint_findNeighbourPixel(PaintUVPoint *tempPoints, DerivedMesh *dm, char *uvname, int w, int h, int px, int py, int n_index)
1862 {
1863         /* Note: Current method only uses polygon edges to detect neighbouring pixels.
1864         *  -> It doesn't always lead to the optimum pixel but is accurate enough
1865         *  and faster/simplier than including possible face tip point links)
1866         */
1867
1868         int x,y;
1869         PaintUVPoint *tPoint = NULL;
1870         PaintUVPoint *cPoint = NULL;
1871
1872         /* shift position by given n_index */
1873         x = px + neighX[n_index];
1874         y = py + neighY[n_index];
1875
1876         if (x<0 || x>=w) return -1;
1877         if (y<0 || y>=h) return -1;
1878
1879         tPoint = &tempPoints[x+w*y];            /* UV neighbour */
1880         cPoint = &tempPoints[px+w*py];          /* Origin point */
1881
1882         /*
1883         *       Check if shifted point is on same face -> it's a correct neighbour
1884         *   (and if it isn't marked as an "edge pixel")
1885         */
1886         if ((tPoint->face_index == cPoint->face_index) && (tPoint->neighbour_pixel == -1))
1887                 return (x+w*y);
1888
1889         /*
1890         *       Even if shifted point is on another face
1891         *       -> use this point.
1892         *
1893         *       !! Replace with "is uv faces linked" check !!
1894         *       This should work fine as long as uv island
1895         *       margin is > 1 pixel.
1896         */
1897         if ((tPoint->face_index != -1) && (tPoint->neighbour_pixel == -1)) {
1898                 return (x+w*y);
1899         }
1900
1901         /*
1902         *       If we get here, the actual neighbouring pixel
1903         *       is located on a non-linked uv face, and we have to find
1904         *       it's "real" position.
1905         *
1906         *       Simple neighbouring face finding algorithm:
1907         *       - find closest uv edge to shifted pixel and get
1908         *         the another face that shares that edge
1909         *       - find corresponding position of that new face edge
1910         *         in uv space
1911         *
1912         *       TODO: Implement something more accurate / optimized?
1913         */
1914         {
1915                 int numOfFaces = dm->getNumFaces(dm);
1916                 MFace *mface = dm->getFaceArray(dm);
1917                 MTFace *tface =  CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1918
1919                 /* Get closest edge to that subpixel on UV map  */
1920                 {
1921                         float pixel[2], dist, t_dist;
1922                         int i, uindex[3], edge1_index, edge2_index,
1923                                 e1_index, e2_index, target_face;
1924                         float closest_point[2], lambda, dir_vec[2];
1925                         int target_uv1, target_uv2, final_pixel[2], final_index;
1926
1927                         float *s_uv1, *s_uv2, *t_uv1, *t_uv2;
1928
1929                         pixel[0] = ((float)(px + neighX[n_index]) + 0.5f) / (float)w;
1930                         pixel[1] = ((float)(py + neighY[n_index]) + 0.5f) / (float)h;
1931
1932                         /* Get uv indexes for current face part */
1933                         if (cPoint->quad) {
1934                                 uindex[0] = 0; uindex[1] = 2; uindex[2] = 3;
1935                         }
1936                         else {
1937                                 uindex[0] = 0; uindex[1] = 1; uindex[2] = 2;
1938                         }
1939
1940                         /*
1941                         *       Find closest edge to that pixel
1942                         */
1943                         /* Dist to first edge   */
1944                         e1_index = cPoint->v1; e2_index = cPoint->v2; edge1_index = uindex[0]; edge2_index = uindex[1];
1945                         dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
1946
1947                         /* Dist to second edge  */
1948                         t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[1]], tface[cPoint->face_index].uv[uindex[2]]);
1949                         if (t_dist < dist) {e1_index = cPoint->v2; e2_index = cPoint->v3; edge1_index = uindex[1]; edge2_index = uindex[2]; dist = t_dist;}
1950
1951                         /* Dist to third edge   */
1952                         t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[2]], tface[cPoint->face_index].uv[uindex[0]]);
1953                         if (t_dist < dist) {e1_index = cPoint->v3; e2_index = cPoint->v1;  edge1_index = uindex[2]; edge2_index = uindex[0]; dist = t_dist;}
1954
1955
1956                         /*
1957                         *       Now find another face that is linked to that edge
1958                         */
1959                         target_face = -1;
1960
1961                         for (i=0; i<numOfFaces; i++) {
1962                                 /*
1963                                 *       Check if both edge vertices share this face
1964                                 */
1965                                 int v4 = (mface[i].v4) ? mface[i].v4 : -1;
1966
1967                                 if ((e1_index == mface[i].v1 || e1_index == mface[i].v2 || e1_index == mface[i].v3 || e1_index == v4) &&
1968                                         (e2_index == mface[i].v1 || e2_index == mface[i].v2 || e2_index == mface[i].v3 || e2_index == v4)) {
1969                                         if (i == cPoint->face_index) continue;
1970
1971                                         target_face = i;
1972
1973                                         /*
1974                                         *       Get edge UV index
1975                                         */
1976                                         if (e1_index == mface[i].v1) target_uv1 = 0;
1977                                         else if (e1_index == mface[i].v2) target_uv1 = 1;
1978                                         else if (e1_index == mface[i].v3) target_uv1 = 2;
1979                                         else target_uv1 = 3;
1980
1981                                         if (e2_index == mface[i].v1) target_uv2 = 0;
1982                                         else if (e2_index == mface[i].v2) target_uv2 = 1;
1983                                         else if (e2_index == mface[i].v3) target_uv2 = 2;
1984                                         else target_uv2 = 3;
1985
1986                                         break;
1987                                 }
1988                         }
1989
1990                         /* If none found return -1      */
1991                         if (target_face == -1) return -1;
1992
1993                         /*
1994                         *       If target face is connected in UV space as well, just use original index
1995                         */
1996                         s_uv1 = (float *)tface[cPoint->face_index].uv[edge1_index];
1997                         s_uv2 = (float *)tface[cPoint->face_index].uv[edge2_index];
1998                         t_uv1 = (float *)tface[target_face].uv[target_uv1];
1999                         t_uv2 = (float *)tface[target_face].uv[target_uv2];
2000
2001                         //printf("connected UV : %f,%f & %f,%f - %f,%f & %f,%f\n", s_uv1[0], s_uv1[1], s_uv2[0], s_uv2[1], t_uv1[0], t_uv1[1], t_uv2[0], t_uv2[1]);
2002
2003                         if (((s_uv1[0] == t_uv1[0] && s_uv1[1] == t_uv1[1]) &&
2004                                  (s_uv2[0] == t_uv2[0] && s_uv2[1] == t_uv2[1]) ) ||
2005                                 ((s_uv2[0] == t_uv1[0] && s_uv2[1] == t_uv1[1]) &&
2006                                  (s_uv1[0] == t_uv2[0] && s_uv1[1] == t_uv2[1]) )) return ((px+neighX[n_index]) + w*(py+neighY[n_index]));
2007
2008                         /*
2009                         *       Find a point that is relatively at same edge position
2010                         *       on this other face UV
2011                         */
2012                         lambda = closest_to_line_v2(closest_point, pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
2013                         if (lambda < 0.0f) lambda = 0.0f;
2014                         if (lambda > 1.0f) lambda = 1.0f;
2015
2016                         sub_v2_v2v2(dir_vec, tface[target_face].uv[target_uv2], tface[target_face].uv[target_uv1]);
2017
2018                         mul_v2_fl(dir_vec, lambda);
2019
2020                         copy_v2_v2(pixel, tface[target_face].uv[target_uv1]);
2021                         add_v2_v2(pixel, dir_vec);
2022                         pixel[0] = (pixel[0] * (float)w) - 0.5f;
2023                         pixel[1] = (pixel[1] * (float)h) - 0.5f;
2024
2025                         final_pixel[0] = (int)floor(pixel[0]);
2026                         final_pixel[1] = (int)floor(pixel[1]);
2027
2028                         /* If current pixel uv is outside of texture    */
2029                         if (final_pixel[0] < 0 || final_pixel[0] >= w) return -1;
2030                         if (final_pixel[1] < 0 || final_pixel[1] >= h) return -1;
2031
2032                         final_index = final_pixel[0] + w * final_pixel[1];
2033
2034                         /* If we ended up to our origin point ( mesh has smaller than pixel sized faces)        */
2035                         if (final_index == (px+w*py)) return -1;
2036                         /* If found pixel still lies on wrong face ( mesh has smaller than pixel sized faces)   */
2037                         if (tempPoints[final_index].face_index != target_face) return -1;
2038
2039                         /*
2040                         *       If final point is an "edge pixel", use it's "real" neighbour instead
2041                         */
2042                         if (tempPoints[final_index].neighbour_pixel != -1) final_index = cPoint->neighbour_pixel;
2043
2044                         return final_index;
2045                 }
2046         }
2047 }
2048
2049 /*
2050 *       Create a surface for uv image sequence format
2051 */
2052 int dynamicPaint_createUVSurface(DynamicPaintSurface *surface)
2053 {
2054         /* Antialias jitter point relative coords       */
2055         float jitter5sample[10] =  {0.0f, 0.0f,
2056                                                         -0.2f, -0.4f,
2057                                                         0.2f, 0.4f,
2058                                                         0.4f, -0.2f,
2059                                                         -0.4f, 0.3f};
2060         int ty;
2061         int w,h;
2062         int numOfFaces;
2063         char uvname[32];
2064         int active_points = 0;
2065         int error = 0;
2066
2067         PaintSurfaceData *sData;
2068         DynamicPaintCanvasSettings *canvas = surface->canvas;
2069         DerivedMesh *dm = canvas->dm;
2070
2071         PaintUVPoint *tempPoints = NULL;
2072         Vec3f *tempWeights = NULL;
2073         /* MVert *mvert = NULL; */ /* UNUSED */
2074         MFace *mface = NULL;
2075         MTFace *tface = NULL;
2076         Bounds2D *faceBB = NULL;
2077         int *final_index;
2078         int aa_samples;
2079
2080         if (!dm) return setError(canvas, "Canvas mesh not updated.");
2081         if (surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ) return setError(canvas, "Can't bake non-\"image sequence\" formats.");
2082
2083         numOfFaces = dm->getNumFaces(dm);
2084         /* mvert = dm->getVertArray(dm); */ /* UNUSED */
2085         mface = dm->getFaceArray(dm);
2086
2087         /* get uv layer */
2088         CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->uvlayer_name, uvname);
2089         tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
2090
2091         /* Check for validity   */
2092         if (!tface) return setError(canvas, "No UV data on canvas.");
2093         if (surface->image_resolution < 16 || surface->image_resolution > 8192) return setError(canvas, "Invalid resolution.");
2094
2095         w = h = surface->image_resolution;
2096
2097         /*
2098         *       Start generating the surface
2099         */
2100         printf("DynamicPaint: Preparing UV surface of %ix%i pixels and %i faces.\n", w, h, numOfFaces);
2101
2102         /* Init data struct */
2103         if (surface->data) dynamicPaint_freeSurfaceData(surface);
2104         sData = surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
2105         if (!surface->data) return setError(canvas, "Not enough free memory.");
2106
2107         aa_samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
2108         tempPoints = (struct PaintUVPoint *) MEM_callocN(w*h*sizeof(struct PaintUVPoint), "Temp PaintUVPoint");
2109         if (!tempPoints) error=1;
2110
2111         final_index = (int *) MEM_callocN(w*h*sizeof(int), "Temp UV Final Indexes");
2112         if (!final_index) error=1;
2113
2114         tempWeights = (struct Vec3f *) MEM_mallocN(w*h*aa_samples*sizeof(struct Vec3f), "Temp bWeights");
2115         if (!tempWeights) error=1;
2116
2117         /*
2118         *       Generate a temporary bounding box array for UV faces to optimize
2119         *       the pixel-inside-a-face search.
2120         */
2121         if (!error) {
2122                 faceBB = (struct Bounds2D *) MEM_mallocN(numOfFaces*sizeof(struct Bounds2D), "MPCanvasFaceBB");
2123                 if (!faceBB) error=1;
2124         }
2125
2126         if (!error)
2127         for (ty=0; ty<numOfFaces; ty++) {
2128                 int numOfVert = (mface[ty].v4) ? 4 : 3;
2129                 int i;
2130
2131                 copy_v2_v2(faceBB[ty].min, tface[ty].uv[0]);
2132                 copy_v2_v2(faceBB[ty].max, tface[ty].uv[0]);
2133
2134                 for (i = 1; i<numOfVert; i++) {
2135                         if (tface[ty].uv[i][0] < faceBB[ty].min[0]) faceBB[ty].min[0] = tface[ty].uv[i][0];
2136                         if (tface[ty].uv[i][1] < faceBB[ty].min[1]) faceBB[ty].min[1] = tface[ty].uv[i][1];
2137                         if (tface[ty].uv[i][0] > faceBB[ty].max[0]) faceBB[ty].max[0] = tface[ty].uv[i][0];
2138                         if (tface[ty].uv[i][1] > faceBB[ty].max[1]) faceBB[ty].max[1] = tface[ty].uv[i][1];
2139
2140                 }
2141         }
2142
2143         /*
2144         *       Loop through every pixel and check
2145         *       if pixel is uv-mapped on a canvas face.
2146         */
2147         if (!error) {
2148                 #pragma omp parallel for schedule(static)
2149                 for (ty = 0; ty < h; ty++)
2150                 {
2151                         int tx;
2152                         for (tx = 0; tx < w; tx++)
2153                         {
2154                                 int i, sample;
2155                                 int index = tx+w*ty;
2156                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2157
2158                                 short isInside = 0;     /* if point is inside a uv face */
2159
2160                                 float d1[2], d2[2], d3[2], point[5][2];
2161                                 float dot00,dot01,dot02,dot11,dot12, invDenom, u,v;
2162
2163                                 /* Init per pixel settings */
2164                                 tPoint->face_index = -1;
2165                                 tPoint->neighbour_pixel = -1;
2166                                 tPoint->pixel_index = index;
2167
2168                                 /* Actual pixel center, used when collision is found    */
2169                                 point[0][0] = ((float)tx + 0.5f) / w;
2170                                 point[0][1] = ((float)ty + 0.5f) / h;
2171
2172                                 /*
2173                                 * A pixel middle sample isn't enough to find very narrow polygons
2174                                 * So using 4 samples of each corner too
2175                                 */
2176                                 point[1][0] = ((float)tx) / w;
2177                                 point[1][1] = ((float)ty) / h;
2178
2179                                 point[2][0] = ((float)tx+1) / w;
2180                                 point[2][1] = ((float)ty) / h;
2181
2182                                 point[3][0] = ((float)tx) / w;
2183                                 point[3][1] = ((float)ty+1) / h;
2184
2185                                 point[4][0] = ((float)tx+1) / w;
2186                                 point[4][1] = ((float)ty+1) / h;
2187
2188
2189                                 /* Loop through samples, starting from middle point     */
2190                                 for (sample=0; sample<5; sample++) {
2191
2192                                         /* Loop through every face in the mesh  */
2193                                         for (i=0; i<numOfFaces; i++) {
2194
2195                                                 /* Check uv bb  */
2196                                                 if (faceBB[i].min[0] > (point[sample][0])) continue;
2197                                                 if (faceBB[i].min[1] > (point[sample][1])) continue;
2198                                                 if (faceBB[i].max[0] < (point[sample][0])) continue;
2199                                                 if (faceBB[i].max[1] < (point[sample][1])) continue;
2200
2201                                                 /*  Calculate point inside a triangle check
2202                                                 *       for uv0,1,2 */
2203                                                 sub_v2_v2v2(d1,  tface[i].uv[2], tface[i].uv[0]);       // uv2 - uv0
2204                                                 sub_v2_v2v2(d2,  tface[i].uv[1], tface[i].uv[0]);       // uv1 - uv0
2205                                                 sub_v2_v2v2(d3,  point[sample], tface[i].uv[0]);        // point - uv0
2206
2207                                                 dot00 = d1[0]*d1[0] + d1[1]*d1[1];
2208                                                 dot01 = d1[0]*d2[0] + d1[1]*d2[1];
2209                                                 dot02 = d1[0]*d3[0] + d1[1]*d3[1];
2210                                                 dot11 = d2[0]*d2[0] + d2[1]*d2[1];
2211                                                 dot12 = d2[0]*d3[0] + d2[1]*d3[1];
2212
2213                                                 invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
2214                                                 u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2215                                                 v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2216
2217                                                 if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=1;} /* is inside a triangle */
2218
2219                                                 /*  If collision wasn't found but the face is a quad
2220                                                 *       do another check for the second half */
2221                                                 if ((!isInside) && mface[i].v4)
2222                                                 {
2223
2224                                                         /* change d2 to test the other half     */
2225                                                         sub_v2_v2v2(d2,  tface[i].uv[3], tface[i].uv[0]);       // uv3 - uv0
2226
2227                                                         /* test again   */
2228                                                         dot00 = d1[0]*d1[0] + d1[1]*d1[1];
2229                                                         dot01 = d1[0]*d2[0] + d1[1]*d2[1];
2230                                                         dot02 = d1[0]*d3[0] + d1[1]*d3[1];
2231                                                         dot11 = d2[0]*d2[0] + d2[1]*d2[1];
2232                                                         dot12 = d2[0]*d3[0] + d2[1]*d3[1];
2233
2234                                                         invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
2235                                                         u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2236                                                         v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2237
2238                                                         if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=2;} /* is inside the second half of the quad */
2239
2240                                                 }
2241
2242                                                 /*
2243                                                 *       If point was inside the face
2244                                                 */
2245                                                 if (isInside != 0) {
2246
2247                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2248                                                         int j;
2249
2250                                                         /* Get triagnle uvs     */
2251                                                         if (isInside==1) {
2252                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2253                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2254                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2255                                                         }
2256                                                         else {
2257                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2258                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2259                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2260                                                         }
2261
2262                                                         /* Add b-weights per anti-aliasing sample       */
2263                                                         for (j=0; j<aa_samples; j++) {
2264                                                                 uv[0] = point[0][0] + jitter5sample[j*2] / w;
2265                                                                 uv[1] = point[0][1] + jitter5sample[j*2+1] / h;
2266
2267                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v);
2268                                                         }
2269
2270                                                         /* Set surface point face values        */
2271                                                         tPoint->face_index = i;                                                 /* face index */
2272                                                         tPoint->quad = (isInside == 2) ? 1 : 0;         /* quad or tri part*/
2273
2274                                                         /* save vertex indexes  */
2275                                                         tPoint->v1 = (isInside == 2) ? mface[i].v1 : mface[i].v1;
2276                                                         tPoint->v2 = (isInside == 2) ? mface[i].v3 : mface[i].v2;
2277                                                         tPoint->v3 = (isInside == 2) ? mface[i].v4 : mface[i].v3;
2278
2279                                                         sample = 5;     /* make sure we exit sample loop as well */
2280                                                         break;
2281                                                 }
2282                                         }
2283                                 } /* sample loop */
2284                         }
2285                 }
2286
2287                 /*
2288                 *       Now loop through every pixel that was left without index
2289                 *       and find if they have neighbouring pixels that have an index.
2290                 *       If so use that polygon as pixel surface.
2291                 *       (To avoid seams on uv island edges)
2292                 */
2293                 #pragma omp parallel for schedule(static)
2294                 for (ty = 0; ty < h; ty++)
2295                 {
2296                         int tx;
2297                         for (tx = 0; tx < w; tx++)
2298                         {
2299                                 int index = tx+w*ty;
2300                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2301
2302                                 /* If point isnt't on canvas mesh       */
2303                                 if (tPoint->face_index == -1) {
2304                                         int u_min, u_max, v_min, v_max;
2305                                         int u,v, ind;
2306                                         float point[2];
2307
2308                                         /* get loop area        */
2309                                         u_min = (tx > 0) ? -1 : 0;
2310                                         u_max = (tx < (w-1)) ? 1 : 0;
2311                                         v_min = (ty > 0) ? -1 : 0;
2312                                         v_max = (ty < (h-1)) ? 1 : 0;
2313
2314                                         point[0] = ((float)tx + 0.5f) / w;
2315                                         point[1] = ((float)ty + 0.5f) / h;
2316
2317                                         /* search through defined area for neighbour    */
2318                                         for (u=u_min; u<=u_max; u++)
2319                                                 for (v=v_min; v<=v_max; v++) {
2320                                                         /* if not this pixel itself     */
2321                                                         if (u!=0 || v!=0) {
2322                                                                 ind = (tx+u)+w*(ty+v);
2323
2324                                                                 /* if neighbour has index       */
2325                                                                 if (tempPoints[ind].face_index != -1) {
2326
2327                                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2328                                                                         int i = tempPoints[ind].face_index, j;
2329
2330                                                                         /* Now calculate pixel data for this pixel as it was on polygon surface */
2331                                                                         if (!tempPoints[ind].quad) {
2332                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2333                                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2334                                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2335                                                                         }
2336                                                                         else {
2337                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2338                                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2339                                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2340                                                                         }
2341
2342                                                                         /* Add b-weights per anti-aliasing sample       */
2343                                                                         for (j=0; j<aa_samples; j++) {
2344
2345                                                                                 uv[0] = point[0] + jitter5sample[j*2] / w;
2346                                                                                 uv[1] = point[1] + jitter5sample[j*2+1] / h;
2347                                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v);
2348                                                                         }
2349
2350                                                                         /* Set values   */
2351                                                                         tPoint->neighbour_pixel = ind;                          // face index
2352                                                                         tPoint->quad = tempPoints[ind].quad;            // quad or tri
2353
2354                                                                         /* save vertex indexes  */
2355                                                                         tPoint->v1 = (tPoint->quad) ? mface[i].v1 : mface[i].v1;
2356                                                                         tPoint->v2 = (tPoint->quad) ? mface[i].v3 : mface[i].v2;
2357                                                                         tPoint->v3 = (tPoint->quad) ? mface[i].v4 : mface[i].v3;
2358
2359                                                                         u = u_max + 1;  /* make sure we exit outer loop as well */
2360                                                                         break;
2361                                                                 }
2362                                                 }
2363                                         }
2364                                 }
2365                         }
2366                 }
2367
2368                 /*
2369                 *       When base loop is over convert found neighbour indexes to real ones
2370                 *       Also count the final number of active surface points
2371                 */
2372                 for (ty = 0; ty < h; ty++)
2373                 {
2374                         int tx;
2375                         for (tx = 0; tx < w; tx++)
2376                         {
2377                                 int index = tx+w*ty;
2378                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2379
2380                                 if (tPoint->face_index == -1 && tPoint->neighbour_pixel != -1) tPoint->face_index = tempPoints[tPoint->neighbour_pixel].face_index;
2381                                 if (tPoint->face_index != -1) active_points++;
2382                         }
2383                 }
2384
2385                 /*      If any effect enabled, create surface effect / wet layer
2386                 *       neighbour lists. Processes possibly moving data. */
2387                 if (surface_usesAdjData(surface)) {
2388
2389                         int i, cursor=0;
2390
2391                         /* Create a temporary array of final indexes (before unassigned
2392                         *  pixels have been dropped) */
2393                         for (i=0; i<w*h; i++) {
2394                                 if (tempPoints[i].face_index != -1) {
2395                                         final_index[i] = cursor;
2396                                         cursor++;
2397                                 }
2398                         }
2399                         /* allocate memory */
2400                         sData->total_points = w*h;
2401                         dynamicPaint_initAdjacencyData(surface, 0);
2402
2403                         if (sData->adj_data) {
2404                                 PaintAdjData *ed = sData->adj_data;
2405                                 unsigned int n_pos = 0;
2406                                 //#pragma omp parallel for schedule(static)
2407                                 for (ty = 0; ty < h; ty++)
2408                                 {
2409                                         int tx;
2410                                         for (tx = 0; tx < w; tx++)
2411                                         {
2412                                                 int i, index = tx+w*ty;
2413
2414                                                 if (tempPoints[index].face_index != -1) {
2415                                                         ed->n_index[final_index[index]] = n_pos;
2416                                                         ed->n_num[final_index[index]] = 0;
2417
2418                                                         for (i=0; i<8; i++) {
2419
2420                                                                 /* Try to find a neighbouring pixel in defined direction
2421                                                                 *  If not found, -1 is returned */
2422                                                                 int n_target = dynamicPaint_findNeighbourPixel(tempPoints, dm, uvname, w, h, tx, ty, i);
2423
2424                                                                 if (n_target != -1) {
2425                                                                         ed->n_target[n_pos] = final_index[n_target];
2426                                                                         ed->n_num[final_index[index]]++;
2427                                                                         n_pos++;
2428                                                                 }
2429                                                         }
2430                                                 }
2431                                         }
2432                                 }
2433                         }
2434                 }
2435
2436                 /* Create final surface data without inactive points */
2437                 {
2438                         ImgSeqFormatData *f_data = MEM_callocN(sizeof(struct ImgSeqFormatData), "ImgSeqFormatData");
2439                         if (f_data) {
2440                                 f_data->uv_p = MEM_callocN(active_points*sizeof(struct PaintUVPoint), "PaintUVPoint");
2441                                 f_data->barycentricWeights = MEM_callocN(active_points*aa_samples*sizeof(struct Vec3f), "PaintUVPoint");
2442
2443                                 if (!f_data->uv_p || !f_data->barycentricWeights) error=1;
2444                         }
2445                         else error=1;
2446
2447                         sData->total_points = active_points;
2448
2449                         /* in case of allocation error, free everything */
2450                         if (error) {
2451                                 if (f_data) {
2452                                         if (f_data->uv_p) MEM_freeN(f_data->uv_p);
2453                                         if (f_data->barycentricWeights) MEM_freeN(f_data->barycentricWeights);
2454                                         MEM_freeN(f_data);
2455                                 }
2456                         }
2457                         else {
2458                                 int index, cursor = 0;
2459                                 sData->total_points = active_points;
2460                                 sData->format_data = f_data;
2461
2462                                 for(index = 0; index < (w*h); index++) {
2463                                         if (tempPoints[index].face_index != -1) {
2464                                                 memcpy(&f_data->uv_p[cursor], &tempPoints[index], sizeof(PaintUVPoint));
2465                                                 memcpy(&f_data->barycentricWeights[cursor*aa_samples], &tempWeights[index*aa_samples], sizeof(Vec3f)*aa_samples);
2466                                                 cursor++;
2467                                         }
2468                                 }
2469                         }
2470                 }
2471         }
2472         if (error==1) setError(canvas, "Not enough free memory.");
2473
2474         if (faceBB) MEM_freeN(faceBB);
2475         if (tempPoints) MEM_freeN(tempPoints);
2476         if (tempWeights) MEM_freeN(tempWeights);
2477         if (final_index) MEM_freeN(final_index);
2478
2479         /* Init surface type data */
2480         if (!error) {
2481                 dynamicPaint_allocateSurfaceType(surface);
2482
2483 #if 0
2484                 /*  -----------------------------------------------------------------
2485                 *       For debug, output pixel statuses to the color map
2486                 *       -----------------------------------------------------------------*/
2487                 #pragma omp parallel for schedule(static)
2488                 for (index = 0; index < sData->total_points; index++)
2489                 {
2490                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
2491                         PaintUVPoint *uvPoint = &((PaintUVPoint*)f_data->uv_p)[index];
2492                         PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index];
2493                         pPoint->alpha=1.0f;
2494
2495                         /* Every pixel that is assigned as "edge pixel" gets blue color */
2496                         if (uvPoint->neighbour_pixel != -1) pPoint->color[2] = 1.0f;
2497                         /* and every pixel that finally got an polygon gets red color   */
2498                         if (uvPoint->face_index != -1) pPoint->color[0] = 1.0f;
2499                         /* green color shows pixel face index hash      */
2500                         if (uvPoint->face_index != -1) pPoint->color[1] = (float)(uvPoint->face_index % 255)/256.0f;
2501                 }
2502
2503 #endif
2504                 dynamicPaint_setInitialColor(surface);
2505         }
2506
2507         return (error == 0);
2508 }
2509
2510 /*
2511 *       Outputs an image file from uv surface data.
2512 */
2513 void dynamicPaint_outputSurfaceImage(DynamicPaintSurface *surface, char* filename, short output_layer)
2514 {
2515         int index;
2516         ImBuf* ibuf = NULL;
2517         PaintSurfaceData *sData = surface->data;
2518         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
2519         /* OpenEXR or PNG       */
2520         int format = (surface->image_fileformat & MOD_DPAINT_IMGFORMAT_OPENEXR) ? R_OPENEXR : R_PNG;
2521         char output_file[FILE_MAX];
2522
2523         if (!sData || !sData->type_data) {setError(surface->canvas, "Image save failed: Invalid surface.");return;}
2524         /* if selected format is openexr, but current build doesnt support one */
2525         #ifndef WITH_OPENEXR
2526         if (format == R_OPENEXR) format = R_PNG;
2527         #endif
2528         BLI_strncpy(output_file, filename, sizeof(output_file));
2529         BKE_add_image_extension(output_file, format);
2530
2531         /* Validate output file path    */
2532         BLI_path_abs(output_file, G.main->name);
2533         BLI_make_existing_file(output_file);
2534
2535         /* Init image buffer    */
2536         ibuf = IMB_allocImBuf(surface->image_resolution, surface->image_resolution, 32, IB_rectfloat);
2537         if (ibuf == NULL) {setError(surface->canvas, "Image save failed: Not enough free memory.");return;}
2538
2539         #pragma omp parallel for schedule(static)
2540         for (index = 0; index < sData->total_points; index++)
2541         {
2542                 int pos=f_data->uv_p[index].pixel_index*4;      /* image buffer position */
2543
2544                 /* Set values of preferred type */
2545                 if (output_layer == 1) {
2546                         /* wetmap */
2547                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2548                                 PaintPoint *point = &((PaintPoint*)sData->type_data)[index];
2549                                 float value = (point->wetness > 1.0f) ? 1.0f : point->wetness;
2550
2551                                 ibuf->rect_float[pos]=value;
2552                                 ibuf->rect_float[pos+1]=value;
2553                                 ibuf->rect_float[pos+2]=value;
2554                                 ibuf->rect_float[pos+3]=1.0f;
2555                         }
2556                 }
2557                 else if (output_layer == 0) {
2558                         /* Paintmap */
2559                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2560                                 PaintPoint *point = &((PaintPoint*)sData->type_data)[index];
2561
2562                                 ibuf->rect_float[pos]   = point->color[0];
2563                                 ibuf->rect_float[pos+1] = point->color[1];
2564                                 ibuf->rect_float[pos+2] = point->color[2];
2565                                 /* mix wet layer */
2566                                 if (point->e_alpha) mixColors(&ibuf->rect_float[pos], point->alpha, point->e_color, point->e_alpha);
2567
2568                                 /* use highest alpha    */
2569                                 ibuf->rect_float[pos+3] = (point->e_alpha > point->alpha) ? point->e_alpha : point->alpha;
2570
2571                                 /* Multiply color by alpha if enabled   */
2572                                 if (surface->flags & MOD_DPAINT_MULALPHA) {
2573                                         ibuf->rect_float[pos]   *= ibuf->rect_float[pos+3];
2574                                         ibuf->rect_float[pos+1] *= ibuf->rect_float[pos+3];
2575                                         ibuf->rect_float[pos+2] *= ibuf->rect_float[pos+3];
2576                                 }
2577                         }
2578                         /* displace */
2579                         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
2580                                 float depth = ((float*)sData->type_data)[index];
2581                                 if (surface->depth_clamp)
2582                                         depth /= surface->depth_clamp;
2583
2584                                 if (surface->disp_type == MOD_DPAINT_DISP_DISPLACE) {
2585                                         depth = (0.5f - depth/2.0f);
2586                                 }
2587
2588                                 CLAMP(depth, 0.0f, 1.0f);
2589
2590                                 ibuf->rect_float[pos]=depth;
2591                                 ibuf->rect_float[pos+1]=depth;
2592                                 ibuf->rect_float[pos+2]=depth;
2593                                 ibuf->rect_float[pos+3]=1.0f;
2594                         }
2595                         /* waves */
2596                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
2597                                 PaintWavePoint *wPoint = &((PaintWavePoint*)sData->type_data)[index];
2598                                 float depth = wPoint->height;
2599                                 if (surface->depth_clamp)
2600                                                 depth /= surface->depth_clamp;
2601                                 depth = (0.5f + depth/2.0f);
2602                                 CLAMP(depth, 0.0f, 1.0f);
2603
2604                                 ibuf->rect_float[pos]=depth;
2605                                 ibuf->rect_float[pos+1]=depth;
2606                                 ibuf->rect_float[pos+2]=depth;
2607                                 ibuf->rect_float[pos+3]=1.0f;
2608                         }
2609                 }
2610         }
2611
2612         /* Set output format, png in case exr isnt supported */
2613         ibuf->ftype= PNG|95;
2614 #ifdef WITH_OPENEXR
2615         if (format == R_OPENEXR) {      /* OpenEXR 32-bit float */
2616                 ibuf->ftype = OPENEXR | OPENEXR_COMPRESS;
2617         }
2618 #endif
2619
2620         /* Save image */
2621         IMB_saveiff(ibuf, output_file, IB_rectfloat);
2622         IMB_freeImBuf(ibuf);
2623 }
2624
2625
2626 /***************************** Material / Texture Sampling ******************************/
2627
2628 /* stores a copy of required materials to allow doing adjustments
2629 *  without interfering the render/preview */
2630 typedef struct BrushMaterials {
2631         Material *mat;
2632         Material **ob_mats;
2633         int tot;
2634 } BrushMaterials;
2635
2636 /* Initialize materials for brush object:
2637 *  Calculates inverse matrices for linked objects, updates
2638 *  volume caches etc. */
2639 static void dynamicPaint_updateBrushMaterials(Object *brushOb, Material *ui_mat, Scene *scene, BrushMaterials *bMats)
2640 {
2641         /* Calculate inverse transformation matrix
2642         *  for this object */
2643         invert_m4_m4(brushOb->imat, brushOb->obmat);
2644         copy_m4_m4(brushOb->imat_ren, brushOb->imat);
2645
2646         /* Now process every material linked to this brush object */
2647         if ((ui_mat == NULL) && brushOb->mat && brushOb->totcol) {
2648                 int i, tot=(*give_totcolp(brushOb));
2649
2650                 /* allocate material pointer array */
2651                 if (tot) {
2652                         bMats->ob_mats = MEM_callocN(sizeof(Material*)*(tot), "BrushMaterials");
2653                         for (i=0; i<tot; i++) {
2654                                 bMats->ob_mats[i] = RE_init_sample_material(give_current_material(brushOb,(i+1)), scene);
2655                         }
2656                 }
2657                 bMats->tot = tot;
2658         }
2659         else {
2660                 bMats->mat = RE_init_sample_material(ui_mat, scene);
2661         }
2662 }
2663
2664 /* free all data allocated by dynamicPaint_updateBrushMaterials() */
2665 static void dynamicPaint_freeBrushMaterials(BrushMaterials *bMats)
2666 {
2667         /* Now process every material linked to this brush object */
2668         if (bMats->ob_mats) {
2669                 int i;
2670                 for (i=0; i<bMats->tot; i++) {
2671                         RE_free_sample_material(bMats->ob_mats[i]);
2672                 }
2673                 MEM_freeN(bMats->ob_mats);
2674         }
2675         else if (bMats->mat) {
2676                 RE_free_sample_material(bMats->mat);
2677         }
2678 }
2679
2680 /*
2681 *       Get material diffuse color and alpha (including linked textures) in given coordinates
2682 */
2683 void dynamicPaint_doMaterialTex(BrushMaterials *bMats, float color[3], float *alpha, Object *brushOb, const float volume_co[3], const float surface_co[3], int faceIndex, short isQuad, DerivedMesh *orcoDm)
2684 {
2685         Material *mat = bMats->mat;
2686         MFace *mface = orcoDm->getFaceArray(orcoDm);
2687
2688         /* If no material defined, use the one assigned to the mesh face */
2689         if (mat == NULL) {
2690                 if (bMats->ob_mats) {
2691                         int mat_nr = mface[faceIndex].mat_nr;
2692                         if (mat_nr >= (*give_totcolp(brushOb))) return;
2693                         mat = bMats->ob_mats[mat_nr];
2694                         if (mat == NULL) return;        /* No material assigned */
2695                 }
2696                 else return;
2697         }
2698
2699         RE_sample_material_color(mat, color, alpha, volume_co, surface_co, faceIndex, isQuad, orcoDm, brushOb);
2700 }
2701
2702
2703 /***************************** Ray / Nearest Point Utils ******************************/
2704
2705
2706 /*  A modified callback to bvh tree raycast. The tree must bust have been built using bvhtree_from_mesh_faces.
2707 *   userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree.
2708 *
2709 *       To optimize brush detection speed this doesn't calculate hit coordinates or normal.
2710 *       If ray hit the second half of a quad, no[0] is set to 1.0f.
2711 */
2712 static void mesh_faces_spherecast_dp(void *userdata, int index, const BVHTreeRay *ray, BVHTreeRayHit *hit)
2713 {
2714         const BVHTreeFromMesh *data = (BVHTreeFromMesh*) userdata;
2715         MVert *vert     = data->vert;
2716         MFace *face = data->face + index;
2717         short quad = 0;
2718
2719         float *t0, *t1, *t2, *t3;
2720         t0 = vert[ face->v1 ].co;
2721         t1 = vert[ face->v2 ].co;
2722         t2 = vert[ face->v3 ].co;
2723         t3 = face->v4 ? vert[ face->v4].co : NULL;
2724
2725         do
2726         {
2727                 float dist = bvhtree_ray_tri_intersection(ray, hit->dist, t0, t1, t2);
2728
2729                 if(dist >= 0 && dist < hit->dist)
2730                 {
2731                         hit->index = index;
2732                         hit->dist = dist;
2733                         hit->no[0] = (quad) ? 1.0f : 0.0f;
2734                 }
2735
2736                 t1 = t2;
2737                 t2 = t3;
2738                 t3 = NULL;
2739                 quad = 1;
2740
2741         } while(t2);
2742 }
2743
2744 /* A modified callback to bvh tree nearest point. The tree must bust have been built using bvhtree_from_mesh_faces.
2745 *  userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree.
2746 *
2747 *       To optimize brush detection speed this doesn't calculate hit normal.
2748 *       If ray hit the second half of a quad, no[0] is set to 1.0f, else 0.0f
2749 */
2750 static void mesh_faces_nearest_point_dp(void *userdata, int index, const float *co, BVHTreeNearest *nearest)
2751 {
2752         const BVHTreeFromMesh *data = (BVHTreeFromMesh*) userdata;
2753         MVert *vert     = data->vert;
2754         MFace *face = data->face + index;
2755         short quad = 0;
2756
2757         float *t0, *t1, *t2, *t3;
2758         t0 = vert[ face->v1 ].co;
2759         t1 = vert[ face->v2 ].co;
2760         t2 = vert[ face->v3 ].co;
2761         t3 = face->v4 ? vert[ face->v4].co : NULL;
2762
2763         do
2764         {
2765                 float nearest_tmp[3], dist;
2766                 int vertex, edge;
2767
2768                 dist = nearest_point_in_tri_surface(t0, t1, t2, co, &vertex, &edge, nearest_tmp);
2769                 if(dist < nearest->dist)
2770                 {
2771                         nearest->index = index;
2772                         nearest->dist = dist;
2773                         copy_v3_v3(nearest->co, nearest_tmp);
2774                         nearest->no[0] = (quad) ? 1.0f : 0.0f;
2775                 }
2776
2777              &nb