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 (1.0f/24.f)
 102 #define WAVE_INIT_SIZE 5.0f
 103 /* drying limits */
 104 #define MIN_WETNESS 0.001f
 105 /* dissolve macro */
 106 #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)
 107
 108 /***************************** Internal Structs ***************************/
 109
 110 typedef struct Bounds2D {
 111         float min[2], max[2];
 112 } Bounds2D;
 113
 114 typedef struct Bounds3D {
 115         int valid;
 116         float min[3], max[3];
 117 } Bounds3D;
 118
 119 typedef struct VolumeGrid {
 120         int dim[3];
 121         Bounds3D grid_bounds; /* whole grid bounds */
 122
 123         Bounds3D *bounds;       /* (x*y*z) precalculated grid cell bounds */
 124         int *s_pos; /* (x*y*z) t_index begin id */
 125         int *s_num; /* (x*y*z) number of t_index points */
 126         int *t_index; /* actual surface point index,
 127                                                    access: (s_pos+s_num) */
 128 } VolumeGrid;
 129
 130 typedef struct Vec3f {
 131         float v[3];
 132 } Vec3f;
 133
 134 typedef struct BakeNeighPoint {
 135         float dir[3];   /* vector pointing towards this neighbour */
 136         float dist;             /* distance to */
 137 } BakeNeighPoint;
 138
 139 /* Surface data used while processing a frame   */
 140 typedef struct PaintBakeNormal {
 141         float invNorm[3];  /* current pixel world-space inverted normal */
 142         float normal_scale; /* normal directional scale for displace mapping */
 143 } PaintBakeNormal;
 144
 145 /* Temp surface data used to process a frame */
 146 typedef struct PaintBakeData {
 147         /* point space data */
 148         PaintBakeNormal *bNormal;
 149         int *s_pos;     /* index to start reading point sample realCoord */
 150         int *s_num;     /* num of realCoord samples */
 151         Vec3f *realCoord;  /* current pixel center world-space coordinates for each sample
 152                                            *  ordered as (s_pos+s_num)*/
 153         Bounds3D mesh_bounds;
 154
 155         /* adjacency info */
 156         BakeNeighPoint *bNeighs; /* current global neighbour distances and directions, if required */
 157         double average_dist;
 158         /* space partitioning */
 159         VolumeGrid *grid;               /* space partitioning grid to optimize brush checks */
 160
 161         /* velocity and movement */
 162         Vec3f *velocity;                /* speed vector in global space movement per frame, if required */
 163         Vec3f *prev_velocity;
 164         float *brush_velocity;  /* special temp data for post-p velocity based brushes like smudge
 165                                                         *  3 float dir vec + 1 float str */
 166         MVert *prev_verts;              /* copy of previous frame vertices. used to observe surface movement */
 167         float prev_obmat[4][4]; /* previous frame object matrix */
 168         int clear;                              /* flag to check if surface was cleared/reset -> have to redo velocity etc. */
 169
 170 } PaintBakeData;
 171
 172 /* UV Image sequence format point       */
 173 typedef struct PaintUVPoint {
 174         /* Pixel / mesh data */
 175         unsigned int face_index, pixel_index;   /* face index on domain derived mesh */
 176         unsigned int v1, v2, v3;                                /* vertex indexes */
 177
 178         unsigned int neighbour_pixel;   /* If this pixel isn't uv mapped to any face,
 179                                                                            but it's neighbouring pixel is */
 180         short quad;
 181 } PaintUVPoint;
 182
 183 typedef struct ImgSeqFormatData {
 184         PaintUVPoint *uv_p;
 185         Vec3f *barycentricWeights;              /* b-weights for all pixel samples */
 186 } ImgSeqFormatData;
 187
 188 typedef struct EffVelPoint {
 189         float previous_pos[3];
 190         float previous_vel[3];
 191 } EffVelPoint;
 192
 193
 194 /* adjacency data flags */
 195 #define ADJ_ON_MESH_EDGE (1<<0)
 196
 197 typedef struct PaintAdjData {
 198         int *n_target;          /* array of neighbouring point indexes,
 199                                                                for single sample use (n_index+neigh_num) */
 200         int *n_index;           /* index to start reading n_target for each point */
 201         int *n_num;             /* num of neighs for each point */
 202         int *flags;             /* vertex adjacency flags */
 203         int total_targets; /* size of n_target */
 204 } PaintAdjData;
 205
 206 /***************************** General Utils ******************************/
 207
 208 /* Set canvas error string to display at the bake report */
 209 static int setError(DynamicPaintCanvasSettings *canvas, const char *string)
 210 {
 211         /* Add error to canvas ui info label */
 212         BLI_strncpy(canvas->error, string, sizeof(canvas->error));
 213         return 0;
 214 }
 215
 216 /* Get number of surface points for cached types */
 217 static int dynamicPaint_surfaceNumOfPoints(DynamicPaintSurface *surface)
 218 {
 219         if (surface->format == MOD_DPAINT_SURFACE_F_PTEX) {
 220                 return 0; /* not supported atm */
 221         }
 222         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
 223                 if (!surface->canvas->dm) return 0; /* invalid derived mesh */
 224                 return surface->canvas->dm->getNumVerts(surface->canvas->dm);
 225         }
 226         else
 227                 return 0;
 228 }
 229
 230 /* checks whether surface's format/type has realtime preview */
 231 int dynamicPaint_surfaceHasColorPreview(DynamicPaintSurface *surface)
 232 {
 233         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 0;
 234         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
 235                 if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE ||
 236                         surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 0;
 237                 else return 1;
 238         }
 239         else return 1;
 240 }
 241
 242 /* get currently active surface (in user interface) */
 243 struct DynamicPaintSurface *get_activeSurface(DynamicPaintCanvasSettings *canvas)
 244 {
 245         DynamicPaintSurface *surface = canvas->surfaces.first;
 246         int i;
 247
 248         for(i=0; surface; surface=surface->next) {
 249                 if(i == canvas->active_sur)
 250                         return surface;
 251                 i++;
 252         }
 253         return NULL;
 254 }
 255
 256 /* set preview to first previewable surface */
 257 void dynamicPaint_resetPreview(DynamicPaintCanvasSettings *canvas)
 258 {
 259         DynamicPaintSurface *surface = canvas->surfaces.first;
 260         int done=0;
 261
 262         for(; surface; surface=surface->next) {
 263                 if (!done && dynamicPaint_surfaceHasColorPreview(surface)) {
 264                         surface->flags |= MOD_DPAINT_PREVIEW;
 265                         done=1;
 266                 }
 267                 else
 268                         surface->flags &= ~MOD_DPAINT_PREVIEW;
 269         }
 270 }
 271
 272 /* set preview to defined surface */
 273 static void dynamicPaint_setPreview(DynamicPaintSurface *t_surface)
 274 {
 275         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
 276         for(; surface; surface=surface->next) {
 277                 if (surface == t_surface)
 278                         surface->flags |= MOD_DPAINT_PREVIEW;
 279                 else
 280                         surface->flags &= ~MOD_DPAINT_PREVIEW;
 281         }
 282 }
 283
 284 int dynamicPaint_outputLayerExists(struct DynamicPaintSurface *surface, Object *ob, int output)
 285 {
 286         char *name;
 287
 288         if (output == 0)
 289                 name = surface->output_name;
 290         else if (output == 1)
 291                 name = surface->output_name2;
 292         else
 293                 return 0;
 294
 295         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
 296                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
 297                         Mesh *me = ob->data;
 298                         return (CustomData_get_named_layer_index(&me->fdata, CD_MCOL, name) != -1);
 299                 }
 300                 else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT)
 301                         return (defgroup_name_index(ob, surface->output_name) != -1);
 302         }
 303
 304         return 0;
 305 }
 306
 307 static int surface_duplicateOutputExists(void *arg, const char *name)
 308 {
 309         DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg;
 310         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
 311
 312         for(; surface; surface=surface->next) {
 313                 if (surface!=t_surface && surface->type==t_surface->type &&
 314                         surface->format==t_surface->format) {
 315                         if (surface->output_name[0]!='\0' && !strcmp(name, surface->output_name)) return 1;
 316                         if (surface->output_name2[0]!='\0' && !strcmp(name, surface->output_name2)) return 1;
 317                 }
 318         }
 319         return 0;
 320 }
 321
 322 static void surface_setUniqueOutputName(DynamicPaintSurface *surface, char *basename, int output)
 323 {
 324         char name[64];
 325         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
 326         if (!output)
 327                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name, sizeof(surface->output_name));
 328         if (output)
 329                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name2, sizeof(surface->output_name2));
 330 }
 331
 332
 333 static int surface_duplicateNameExists(void *arg, const char *name)
 334 {
 335         DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg;
 336         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
 337
 338         for(; surface; surface=surface->next) {
 339                 if (surface!=t_surface && !strcmp(name, surface->name)) return 1;
 340         }
 341         return 0;
 342 }
 343
 344 void dynamicPaintSurface_setUniqueName(DynamicPaintSurface *surface, const char *basename)
 345 {
 346         char name[64];
 347         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
 348         BLI_uniquename_cb(surface_duplicateNameExists, surface, name, '.', surface->name, sizeof(surface->name));
 349 }
 350
 351
 352 /* change surface data to defaults on new type */
 353 void dynamicPaintSurface_updateType(struct DynamicPaintSurface *surface)
 354 {
 355         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
 356                 surface->output_name[0]='\0';
 357                 surface->output_name2[0]='\0';
 358                 surface->flags |= MOD_DPAINT_ANTIALIAS;
 359                 surface->depth_clamp = 1.0f;
 360         }
 361         else {
 362                 sprintf(surface->output_name, "dp_");
 363                 strcpy(surface->output_name2,surface->output_name);
 364                 surface->flags &= ~MOD_DPAINT_ANTIALIAS;
 365                 surface->depth_clamp = 0.0f;
 366         }
 367
 368         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
 369                 strcat(surface->output_name,"paintmap");
 370                 strcat(surface->output_name2,"wetmap");
 371                 surface_setUniqueOutputName(surface, surface->output_name2, 1);
 372         }
 373         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
 374                 strcat(surface->output_name,"displace");
 375         }
 376         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
 377                 strcat(surface->output_name,"weight");
 378         }
 379         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
 380                 strcat(surface->output_name,"wave");
 381         }
 382
 383         surface_setUniqueOutputName(surface, surface->output_name, 0);
 384
 385         /* update preview */
 386         if (dynamicPaint_surfaceHasColorPreview(surface))
 387                 dynamicPaint_setPreview(surface);
 388         else
 389                 dynamicPaint_resetPreview(surface->canvas);
 390 }
 391
 392 static int surface_totalSamples(DynamicPaintSurface *surface)
 393 {
 394         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ &&
 395                 surface->flags & MOD_DPAINT_ANTIALIAS)
 396                 return (surface->data->total_points*5);
 397         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
 398                 surface->flags & MOD_DPAINT_ANTIALIAS && surface->data->adj_data)
 399                 return (surface->data->total_points+surface->data->adj_data->total_targets);
 400
 401         return surface->data->total_points;
 402 }
 403
 404 static void blendColors(float t_color[3], float t_alpha, float s_color[3], float s_alpha, float result[4])
 405 {
 406         int i;
 407         float i_alpha = 1.0f - s_alpha;
 408         float f_alpha = t_alpha*i_alpha + s_alpha;
 409
 410         /* blend colors */
 411         if (f_alpha) {
 412                 for (i=0; i<3; i++) {
 413                         result[i] = (t_color[i]*t_alpha*i_alpha + s_color[i]*s_alpha)/f_alpha;
 414                 }
 415         }
 416         else {
 417                 copy_v3_v3(result, t_color);
 418         }
 419         /* return final alpha */
 420         result[3] = f_alpha;
 421 }
 422
 423 /* assumes source alpha > 0.0f or results NaN colors */
 424 static void mixColors(float *t_color, float t_alpha, float *s_color, float s_alpha)
 425 {
 426         float factor = (s_alpha<t_alpha) ? 1.0f : t_alpha/s_alpha;
 427
 428         /* set initial color depending on existing alpha */
 429         interp_v3_v3v3(t_color, s_color, t_color, factor);
 430         /* mix final color */
 431         interp_v3_v3v3(t_color, t_color, s_color, s_alpha);
 432 }
 433
 434 /* set "ignore cache" flag for all caches on this object */
 435 static void object_cacheIgnoreClear(Object *ob, int state)
 436 {
 437         ListBase pidlist;
 438         PTCacheID *pid;
 439         BKE_ptcache_ids_from_object(&pidlist, ob, NULL, 0);
 440
 441         for(pid=pidlist.first; pid; pid=pid->next) {
 442                 if(pid->cache) {
 443                         if (state)
 444                                 pid->cache->flag |= PTCACHE_IGNORE_CLEAR;
 445                         else
 446                                 pid->cache->flag &= ~PTCACHE_IGNORE_CLEAR;
 447                 }
 448         }
 449
 450         BLI_freelistN(&pidlist);
 451 }
 452
 453 static void subframe_updateObject(Scene *scene, Object *ob, int flags, float frame)
 454 {
 455         DynamicPaintModifierData *pmd = (DynamicPaintModifierData *)modifiers_findByType(ob, eModifierType_DynamicPaint);
 456
 457         /* if other is dynamic paint canvas, dont update */
 458         if (pmd && pmd->canvas)
 459                 return;
 460
 461         /* if object has parent, update it too */
 462         if ((flags & UPDATE_PARENTS) && ob->parent) subframe_updateObject(scene, ob->parent, 0, frame);
 463         if ((flags & UPDATE_PARENTS) && ob->track) subframe_updateObject(scene, ob->track, 0, frame);
 464
 465         /* for curve following objects, parented curve has to be updated too */
 466         if(ob->type==OB_CURVE) {
 467                 Curve *cu= ob->data;
 468                 BKE_animsys_evaluate_animdata(scene, &cu->id, cu->adt, frame, ADT_RECALC_ANIM);
 469         }
 470
 471         ob->recalc |= OB_RECALC_ALL;
 472         BKE_animsys_evaluate_animdata(scene, &ob->id, ob->adt, frame, ADT_RECALC_ANIM);
 473         if (flags & UPDATE_MESH) {
 474                 /* ignore cache clear during subframe updates
 475                 *  to not mess up cache validity */
 476                 object_cacheIgnoreClear(ob, 1);
 477                 object_handle_update(scene, ob);
 478                 object_cacheIgnoreClear(ob, 0);
 479         }
 480         else
 481                 where_is_object_time(scene, ob, frame);
 482 }
 483
 484 static void scene_setSubframe(Scene *scene, float subframe)
 485 {
 486         /* dynamic paint subframes must be done on previous frame */
 487         scene->r.cfra -= 1;
 488         scene->r.subframe = subframe;
 489 }
 490
 491 #define BRUSH_USES_VELOCITY (1<<0)
 492
 493 static int surface_getBrushFlags(DynamicPaintSurface *surface, Scene *scene)
 494 {
 495         Base *base = NULL;
 496         GroupObject *go = NULL;
 497         Object *brushObj = NULL;
 498         ModifierData *md = NULL;
 499
 500         int flags = 0;
 501
 502         if(surface->brush_group)
 503                 go = surface->brush_group->gobject.first;
 504         else
 505                 base = scene->base.first;
 506
 507         while (base || go)
 508         {
 509                 brushObj = NULL;
 510
 511                 /* select object */
 512                 if(surface->brush_group) {
 513                         if(go->ob)      brushObj = go->ob;
 514                 }
 515                 else
 516                         brushObj = base->object;
 517
 518                 if(!brushObj)
 519                 {
 520                         if(surface->brush_group) go = go->next;
 521                         else base= base->next;
 522                         continue;
 523                 }
 524
 525                 if(surface->brush_group)
 526                         go = go->next;
 527                 else
 528                         base= base->next;
 529
 530                 md = modifiers_findByType(brushObj, eModifierType_DynamicPaint);
 531                 if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render))
 532                 {
 533                         DynamicPaintModifierData *pmd2 = (DynamicPaintModifierData *)md;
 534
 535                         if (pmd2->brush)
 536                         {
 537                                 DynamicPaintBrushSettings *brush = pmd2->brush;
 538
 539                                 if (brush->flags & MOD_DPAINT_USES_VELOCITY)
 540                                         flags |= BRUSH_USES_VELOCITY;
 541                         }
 542                 }
 543         }
 544
 545         return flags;
 546 }
 547
 548 static int brush_usesMaterial(DynamicPaintBrushSettings *brush, Scene *scene)
 549 {
 550         return ((brush->flags & MOD_DPAINT_USE_MATERIAL) && (!strcmp(scene->r.engine, "BLENDER_RENDER")));
 551 }
 552
 553 /* check whether two bounds intersect */
 554 static int boundsIntersect(Bounds3D *b1, Bounds3D *b2)
 555 {
 556         int i=2;
 557         if (!b1->valid || !b2->valid) return 0;
 558         for (; i>=0; i-=1)
 559                 if (!(b1->min[i] <= b2->max[i] && b1->max[i] >= b2->min[i])) return 0;
 560         return 1;
 561 }
 562
 563 /* check whether two bounds intersect inside defined proximity */
 564 static int boundsIntersectDist(Bounds3D *b1, Bounds3D *b2, float dist)
 565 {
 566         int i=2;
 567         if (!b1->valid || !b2->valid) return 0;
 568         for (; i>=0; i-=1)
 569                 if (!(b1->min[i] <= (b2->max[i]+dist) && b1->max[i] >= (b2->min[i]-dist))) return 0;
 570         return 1;
 571 }
 572
 573 /* check whether bounds intersects a point with given radius */
 574 static int boundIntersectPoint(Bounds3D *b, float point[3], float radius)
 575 {
 576         int i=2;
 577         if (!b->valid) return 0;
 578         for (; i>=0; i-=1)
 579                 if (!(b->min[i] <= (point[i]+radius) && b->max[i] >= (point[i]-radius))) return 0;
 580         return 1;
 581 }
 582
 583 /* expand bounds by a new point */
 584 static void boundInsert(Bounds3D *b, float point[3])
 585 {
 586         int i=2;
 587         if (!b->valid) {
 588                 copy_v3_v3(b->min, point);
 589                 copy_v3_v3(b->max, point);
 590                 b->valid = 1;
 591         }
 592         else {
 593                 for (; i>=0; i-=1) {
 594                         if (point[i] < b->min[i]) b->min[i]=point[i];
 595                         if (point[i] > b->max[i]) b->max[i]=point[i];
 596                 }
 597         }
 598 }
 599
 600 static void freeGrid(PaintSurfaceData *data)
 601 {
 602         PaintBakeData *bData = data->bData;
 603         VolumeGrid *grid = bData->grid;
 604
 605         if (grid->bounds) MEM_freeN(grid->bounds);
 606         if (grid->s_pos) MEM_freeN(grid->s_pos);
 607         if (grid->s_num) MEM_freeN(grid->s_num);
 608         if (grid->t_index) MEM_freeN(grid->t_index);
 609
 610         MEM_freeN(bData->grid);
 611         bData->grid = NULL;
 612 }
 613
 614 static void surfaceGenerateGrid(struct DynamicPaintSurface *surface)
 615 {
 616         PaintSurfaceData *sData = surface->data;
 617         PaintBakeData *bData = sData->bData;
 618         Bounds3D *grid_bounds;
 619         VolumeGrid *grid;
 620         int grid_cells, axis = 3;
 621         int *temp_t_index = NULL;
 622         int *temp_s_num = NULL;
 623
 624 #ifdef _OPENMP
 625         int num_of_threads = omp_get_max_threads();
 626 #else
 627         int num_of_threads = 1;
 628 #endif
 629
 630         if (bData->grid)
 631                 freeGrid(sData);
 632
 633         /* allocate separate bounds for each thread */
 634         grid_bounds = MEM_callocN(sizeof(Bounds3D)*num_of_threads, "Grid Bounds");
 635         bData->grid = MEM_callocN(sizeof(VolumeGrid), "Surface Grid");
 636         grid = bData->grid;
 637
 638         if (grid && grid_bounds) {
 639                 int i, error = 0;
 640                 float dim_factor, volume, dim[3];
 641                 float td[3];
 642                 float min_dim;
 643
 644                 /* calculate canvas dimensions */
 645                 #pragma omp parallel for schedule(static)
 646                 for (i=0; i<sData->total_points; i++) {
 647                         #ifdef _OPENMP
 648                         int id = omp_get_thread_num();
 649                         boundInsert(&grid_bounds[id], (bData->realCoord[bData->s_pos[i]].v));
 650                         #else
 651                         boundInsert(&grid_bounds[0], (bData->realCoord[bData->s_pos[i]].v));
 652                         #endif
 653                 }
 654
 655                 /* get final dimensions */
 656                 for (i=0; i<num_of_threads; i++) {
 657                         boundInsert(&grid->grid_bounds, grid_bounds[i].min);
 658                         boundInsert(&grid->grid_bounds, grid_bounds[i].max);
 659                 }
 660
 661                 /* get dimensions */
 662                 sub_v3_v3v3(dim, grid->grid_bounds.max, grid->grid_bounds.min);
 663                 copy_v3_v3(td, dim);
 664                 min_dim = MAX3(td[0],td[1],td[2]) / 1000.f;
 665
 666                 /* deactivate zero axises */
 667                 for (i=0; i<3; i++) {
 668                         if (td[i]<min_dim) {td[i]=1.0f; axis-=1;}
 669                 }
 670
 671                 if (axis == 0 || MAX3(td[0],td[1],td[2]) < 0.0001f) {
 672                         MEM_freeN(grid_bounds);
 673                         MEM_freeN(bData->grid);
 674                         bData->grid = NULL;
 675                         return;
 676                 }
 677
 678                 /* now calculate grid volume/area/width depending on num of active axis */
 679                 volume = td[0]*td[1]*td[2];
 680
 681                 /* determine final grid size by trying to fit average 10.000 points per grid cell */
 682                 dim_factor = (float)pow(volume / ((double)sData->total_points / 10000.0), 1.0/(double)axis);
 683
 684                 /* define final grid size using dim_factor, use min 3 for active axises */
 685                 for (i=0; i<3; i++) {
 686                         grid->dim[i] = (int)floor(td[i] / dim_factor);
 687                         CLAMP(grid->dim[i], (dim[i]>=min_dim) ? 3 : 1, 100);
 688                 }
 689                 grid_cells = grid->dim[0]*grid->dim[1]*grid->dim[2];
 690
 691                 /* allocate memory for grids */
 692                 grid->bounds = MEM_callocN(sizeof(Bounds3D) * grid_cells, "Surface Grid Bounds");
 693                 grid->s_pos = MEM_callocN(sizeof(int) * grid_cells, "Surface Grid Position");
 694                 grid->s_num = MEM_callocN(sizeof(int) * grid_cells*num_of_threads, "Surface Grid Points");
 695                 temp_s_num = MEM_callocN(sizeof(int) * grid_cells, "Temp Surface Grid Points");
 696                 grid->t_index = MEM_callocN(sizeof(int) * sData->total_points, "Surface Grid Target Ids");
 697                 temp_t_index = MEM_callocN(sizeof(int) * sData->total_points, "Temp Surface Grid Target Ids");
 698
 699                 /* in case of an allocation failture abort here */
 700                 if (!grid->bounds || !grid->s_pos || !grid->s_num || !grid->t_index || !temp_s_num || !temp_t_index)
 701                         error = 1;
 702
 703                 if (!error) {
 704                         /* calculate number of points withing each cell */
 705                         #pragma omp parallel for schedule(static)
 706                         for (i=0; i<sData->total_points; i++) {
 707                                 int co[3], j;
 708                                 for (j=0; j<3; j++) {
 709                                         co[j] = (int)floor((bData->realCoord[bData->s_pos[i]].v[j] - grid->grid_bounds.min[j])/dim[j]*grid->dim[j]);
 710                                         CLAMP(co[j], 0, grid->dim[j]-1);
 711                                 }
 712
 713                                 temp_t_index[i] = co[0] + co[1] * grid->dim[0] + co[2] * grid->dim[0]*grid->dim[1];
 714                                 #ifdef _OPENMP
 715                                 grid->s_num[temp_t_index[i]+omp_get_thread_num()*grid_cells]++;
 716                                 #else
 717                                 grid->s_num[temp_t_index[i]]++;
 718                                 #endif
 719                         }
 720
 721                         /* for first cell only calc s_num */
 722                         for (i=1; i<num_of_threads; i++) {
 723                                 grid->s_num[0] += grid->s_num[i*grid_cells];
 724                         }
 725
 726                         /* calculate grid indexes */
 727                         for (i=1; i<grid_cells; i++) {
 728                                 int id;
 729                                 for (id=1; id<num_of_threads; id++) {
 730                                         grid->s_num[i] += grid->s_num[i+id*grid_cells];
 731                                 }
 732                                 grid->s_pos[i] = grid->s_pos[i-1] + grid->s_num[i-1];
 733                         }
 734
 735                         /* save point indexes to final array */
 736                         for (i=0; i<sData->total_points; i++) {
 737                                 int pos = grid->s_pos[temp_t_index[i]] + temp_s_num[temp_t_index[i]];
 738                                 grid->t_index[pos] = i;
 739
 740                                 temp_s_num[temp_t_index[i]]++;
 741                         }
 742
 743                         /* calculate cell bounds */
 744                         {
 745                                 int x;
 746                                 #pragma omp parallel for schedule(static)
 747                                 for (x=0; x<grid->dim[0]; x++) {
 748                                         int y;
 749                                         for (y=0; y<grid->dim[1]; y++) {
 750                                                 int z;
 751                                                 for (z=0; z<grid->dim[2]; z++) {
 752                                                         int j, b_index = x + y * grid->dim[0] + z * grid->dim[0]*grid->dim[1];
 753                                                         /* set bounds */
 754                                                         for (j=0; j<3; j++) {
 755                                                                 int s = (j==0) ? x : ((j==1) ? y : z);
 756                                                                 grid->bounds[b_index].min[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*s;
 757                                                                 grid->bounds[b_index].max[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*(s+1);
 758                                                         }
 759                                                         grid->bounds[b_index].valid = 1;
 760                                                 }
 761                                         }
 762                                 }
 763                         }
 764                 }
 765
 766                 if (temp_s_num) MEM_freeN(temp_s_num);
 767                 if (temp_t_index) MEM_freeN(temp_t_index);
 768
 769                 /* free per thread s_num values */
 770                 grid->s_num = MEM_reallocN(grid->s_num, sizeof(int) * grid_cells);
 771
 772                 if (error || !grid->s_num) {
 773                         setError(surface->canvas, "Not enough free memory.");
 774                         freeGrid(sData);
 775                 }
 776         }
 777
 778         if (grid_bounds) MEM_freeN(grid_bounds);
 779 }
 780
 781 /***************************** Freeing data ******************************/
 782
 783 /* Free brush data */
 784 void dynamicPaint_freeBrush(struct DynamicPaintModifierData *pmd)
 785 {
 786         if(pmd->brush) {
 787                 if(pmd->brush->dm)
 788                         pmd->brush->dm->release(pmd->brush->dm);
 789                 pmd->brush->dm = NULL;
 790
 791                 if(pmd->brush->paint_ramp)
 792                          MEM_freeN(pmd->brush->paint_ramp);
 793                 pmd->brush->paint_ramp = NULL;
 794                 if(pmd->brush->vel_ramp)
 795                          MEM_freeN(pmd->brush->vel_ramp);
 796                 pmd->brush->vel_ramp = NULL;
 797
 798                 MEM_freeN(pmd->brush);
 799                 pmd->brush = NULL;
 800         }
 801 }
 802
 803 static void dynamicPaint_freeAdjData(PaintSurfaceData *data)
 804 {
 805         if (data->adj_data) {
 806                 if (data->adj_data->n_index) MEM_freeN(data->adj_data->n_index);
 807                 if (data->adj_data->n_num) MEM_freeN(data->adj_data->n_num);
 808                 if (data->adj_data->n_target) MEM_freeN(data->adj_data->n_target);
 809                 if (data->adj_data->flags) MEM_freeN(data->adj_data->flags);
 810                 MEM_freeN(data->adj_data);
 811                 data->adj_data = NULL;
 812         }
 813 }
 814
 815 static void free_bakeData(PaintSurfaceData *data)
 816 {
 817         PaintBakeData *bData = data->bData;
 818         if (bData) {
 819                 if (bData->bNormal) MEM_freeN(bData->bNormal);
 820                 if (bData->s_pos) MEM_freeN(bData->s_pos);
 821                 if (bData->s_num) MEM_freeN(bData->s_num);
 822                 if (bData->realCoord) MEM_freeN(bData->realCoord);
 823                 if (bData->bNeighs) MEM_freeN(bData->bNeighs);
 824                 if (bData->grid) freeGrid(data);
 825                 if (bData->prev_verts) MEM_freeN(bData->prev_verts);
 826                 if (bData->velocity) MEM_freeN(bData->velocity);
 827                 if (bData->prev_velocity) MEM_freeN(bData->prev_velocity);
 828
 829                 MEM_freeN(data->bData);
 830                 data->bData = NULL;
 831         }
 832 }
 833
 834 /* free surface data if it's not used anymore */
 835 void surface_freeUnusedData(DynamicPaintSurface *surface)
 836 {
 837         if (!surface->data) return;
 838
 839         /* free bakedata if not active or surface is baked */
 840         if (!(surface->flags & MOD_DPAINT_ACTIVE) ||
 841                 (surface->pointcache && surface->pointcache->flag & PTCACHE_BAKED))
 842                 free_bakeData(surface->data);
 843 }
 844
 845 void dynamicPaint_freeSurfaceData(DynamicPaintSurface *surface)
 846 {
 847         PaintSurfaceData *data = surface->data;
 848         if (!data) return;
 849         if (data->format_data) {
 850                 /* format specific free */
 851                 if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
 852                         ImgSeqFormatData *format_data = (ImgSeqFormatData*)data->format_data;
 853                         if (format_data->uv_p)
 854                                 MEM_freeN(format_data->uv_p);
 855                         if (format_data->barycentricWeights)
 856                                 MEM_freeN(format_data->barycentricWeights);
 857                 }
 858                 MEM_freeN(data->format_data);
 859         }
 860         /* type data */
 861         if (data->type_data) MEM_freeN(data->type_data);
 862         dynamicPaint_freeAdjData(data);
 863         /* bake data */
 864         free_bakeData(data);
 865
 866         MEM_freeN(surface->data);
 867         surface->data = NULL;
 868 }
 869
 870 void dynamicPaint_freeSurface(DynamicPaintSurface *surface)
 871 {
 872         /* point cache */
 873         BKE_ptcache_free_list(&(surface->ptcaches));
 874         surface->pointcache = NULL;
 875
 876         if(surface->effector_weights)
 877                 MEM_freeN(surface->effector_weights);
 878         surface->effector_weights = NULL;
 879
 880         BLI_remlink(&(surface->canvas->surfaces), surface);
 881         dynamicPaint_freeSurfaceData(surface);
 882         MEM_freeN(surface);
 883 }
 884
 885 /* Free canvas data */
 886 void dynamicPaint_freeCanvas(DynamicPaintModifierData *pmd)
 887 {
 888         if(pmd->canvas) {
 889                 /* Free surface data */
 890                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
 891                 DynamicPaintSurface *next_surface = NULL;
 892
 893                 while (surface) {
 894                         next_surface = surface->next;
 895                         dynamicPaint_freeSurface(surface);
 896                         surface = next_surface;
 897                 }
 898
 899                 /* free dm copy */
 900                 if (pmd->canvas->dm)
 901                         pmd->canvas->dm->release(pmd->canvas->dm);
 902                 pmd->canvas->dm = NULL;
 903
 904                 MEM_freeN(pmd->canvas);
 905                 pmd->canvas = NULL;
 906         }
 907 }
 908
 909 /* Free whole dp modifier */
 910 void dynamicPaint_Modifier_free(struct DynamicPaintModifierData *pmd)
 911 {
 912         if(pmd) {
 913                 dynamicPaint_freeCanvas(pmd);
 914                 dynamicPaint_freeBrush(pmd);
 915         }
 916 }
 917
 918
 919 /***************************** Initialize and reset ******************************/
 920
 921 /*
 922 *       Creates a new surface and adds it to the list
 923 *       If scene is null, frame range of 1-250 is used
 924 *       A pointer to this surface is returned
 925 */
 926 struct DynamicPaintSurface *dynamicPaint_createNewSurface(DynamicPaintCanvasSettings *canvas, Scene *scene)
 927 {
 928         DynamicPaintSurface *surface= MEM_callocN(sizeof(DynamicPaintSurface), "DynamicPaintSurface");
 929         if (!surface) return NULL;
 930
 931         surface->canvas = canvas;
 932         surface->format = MOD_DPAINT_SURFACE_F_VERTEX;
 933         surface->type = MOD_DPAINT_SURFACE_T_PAINT;
 934
 935         /* cache */
 936         surface->pointcache = BKE_ptcache_add(&(surface->ptcaches));
 937         surface->pointcache->flag |= PTCACHE_DISK_CACHE;
 938         surface->pointcache->step = 1;
 939
 940         /* Set initial values */
 941         surface->flags = MOD_DPAINT_ANTIALIAS | MOD_DPAINT_MULALPHA | MOD_DPAINT_DRY_LOG | MOD_DPAINT_DISSOLVE_LOG |
 942                                          MOD_DPAINT_ACTIVE | MOD_DPAINT_PREVIEW | MOD_DPAINT_OUT1;
 943         surface->effect = 0;
 944         surface->effect_ui = 1;
 945
 946         surface->diss_speed = 250;
 947         surface->dry_speed = 500;
 948         surface->depth_clamp = 0.0f;
 949         surface->disp_factor = 1.0f;
 950         surface->disp_type = MOD_DPAINT_DISP_DISPLACE;
 951         surface->image_fileformat = MOD_DPAINT_IMGFORMAT_PNG;
 952
 953         surface->init_color[0] = 1.0f;
 954         surface->init_color[1] = 1.0f;
 955         surface->init_color[2] = 1.0f;
 956         surface->init_color[3] = 1.0f;
 957
 958         surface->image_resolution = 256;
 959         surface->substeps = 0;
 960
 961         if (scene) {
 962                 surface->start_frame = scene->r.sfra;
 963                 surface->end_frame = scene->r.efra;
 964         }
 965         else {
 966                 surface->start_frame = 1;
 967                 surface->end_frame = 250;
 968         }
 969
 970         surface->spread_speed = 1.0f;
 971         surface->color_spread_speed = 1.0f;
 972         surface->shrink_speed = 1.0f;
 973
 974         surface->wave_damping = 0.04f;
 975         surface->wave_speed = 1.0f;
 976         surface->wave_timescale = 1.0f;
 977         surface->wave_spring = 0.20f;
 978
 979         BLI_snprintf(surface->image_output_path, sizeof(surface->image_output_path), "%sdynamicpaint", U.textudir);
 980         BLI_cleanup_dir(NULL, surface->image_output_path);
 981         dynamicPaintSurface_setUniqueName(surface, "Surface");
 982
 983         surface->effector_weights = BKE_add_effector_weights(NULL);
 984
 985         dynamicPaintSurface_updateType(surface);
 986
 987         BLI_addtail(&canvas->surfaces, surface);
 988
 989         return surface;
 990 }
 991
 992 /*
 993 *       Initialize modifier data
 994 */
 995 int dynamicPaint_createType(struct DynamicPaintModifierData *pmd, int type, struct Scene *scene)
 996 {
 997         if(pmd) {
 998                 if(type == MOD_DYNAMICPAINT_TYPE_CANVAS) {
 999                         DynamicPaintCanvasSettings *canvas;
1000                         if(pmd->canvas)
1001                                 dynamicPaint_freeCanvas(pmd);
1002
1003                         canvas = pmd->canvas = MEM_callocN(sizeof(DynamicPaintCanvasSettings), "DynamicPaint Canvas");
1004                         if (!canvas)
1005                                 return 0;
1006                         canvas->pmd = pmd;
1007                         canvas->dm = NULL;
1008
1009                         /* Create one surface */
1010                         if (!dynamicPaint_createNewSurface(canvas, scene))
1011                                 return 0;
1012
1013                 }
1014                 else if(type == MOD_DYNAMICPAINT_TYPE_BRUSH) {
1015                         DynamicPaintBrushSettings *brush;
1016                         if(pmd->brush)
1017                                 dynamicPaint_freeBrush(pmd);
1018
1019                         brush = pmd->brush = MEM_callocN(sizeof(DynamicPaintBrushSettings), "DynamicPaint Paint");
1020                         if (!brush)
1021                                 return 0;
1022                         brush->pmd = pmd;
1023
1024                         brush->psys = NULL;
1025
1026                         brush->flags = MOD_DPAINT_ABS_ALPHA | MOD_DPAINT_RAMP_ALPHA;
1027                         brush->collision = MOD_DPAINT_COL_VOLUME;
1028
1029                         brush->mat = NULL;
1030                         brush->r = 0.15f;
1031                         brush->g = 0.4f;
1032                         brush->b = 0.8f;
1033                         brush->alpha = 1.0f;
1034                         brush->wetness = 1.0f;
1035
1036                         brush->paint_distance = 1.0f;
1037                         brush->proximity_falloff = MOD_DPAINT_PRFALL_SMOOTH;
1038
1039                         brush->particle_radius = 0.2f;
1040                         brush->particle_smooth = 0.05f;
1041
1042                         brush->wave_type = MOD_DPAINT_WAVEB_CHANGE;
1043                         brush->wave_factor = 1.0f;
1044                         brush->wave_clamp = 0.0f;
1045                         brush->smudge_strength = 0.3f;
1046                         brush->max_velocity = 1.0f;
1047
1048                         brush->dm = NULL;
1049
1050                         /* Paint proximity falloff colorramp. */
1051                         {
1052                                 CBData *ramp;
1053
1054                                 brush->paint_ramp = add_colorband(0);
1055                                 if (!brush->paint_ramp)
1056                                         return 0;
1057                                 ramp = brush->paint_ramp->data;
1058                                 /* Add default smooth-falloff ramp.     */
1059                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = 1.0f;
1060                                 ramp[0].pos = 0.0f;
1061                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].pos = 1.0f;
1062                                 ramp[1].a = 0.0f;
1063                                 pmd->brush->paint_ramp->tot = 2;
1064                         }
1065
1066                         /* Brush velocity ramp. */
1067                         {
1068                                 CBData *ramp;
1069
1070                                 brush->vel_ramp = add_colorband(0);
1071                                 if (!brush->vel_ramp)
1072                                         return 0;
1073                                 ramp = brush->vel_ramp->data;
1074                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = ramp[0].pos = 0.0f;
1075                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].a = ramp[1].pos = 1.0f;
1076                                 brush->paint_ramp->tot = 2;
1077                         }
1078                 }
1079         }
1080         else
1081                 return 0;
1082
1083         return 1;
1084 }
1085
1086 void dynamicPaint_Modifier_copy(struct DynamicPaintModifierData *pmd, struct DynamicPaintModifierData *tpmd)
1087 {
1088         /* Init modifier        */
1089         tpmd->type = pmd->type;
1090         if (pmd->canvas)
1091                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_CANVAS, NULL);
1092         if (pmd->brush)
1093                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_BRUSH, NULL);
1094
1095         /* Copy data    */
1096         if (tpmd->canvas) {
1097                 tpmd->canvas->pmd = tpmd;
1098
1099         } else if (tpmd->brush) {
1100                 DynamicPaintBrushSettings *brush = pmd->brush, *t_brush = tpmd->brush;
1101                 t_brush->pmd = tpmd;
1102
1103                 t_brush->flags = brush->flags;
1104                 t_brush->collision = brush->collision;
1105
1106                 t_brush->mat = brush->mat;
1107                 t_brush->r = brush->r;
1108                 t_brush->g = brush->g;
1109                 t_brush->b = brush->b;
1110                 t_brush->alpha = brush->alpha;
1111                 t_brush->wetness = brush->wetness;
1112
1113                 t_brush->particle_radius = brush->particle_radius;
1114                 t_brush->particle_smooth = brush->particle_smooth;
1115                 t_brush->paint_distance = brush->paint_distance;
1116                 t_brush->psys = brush->psys;
1117
1118                 if (brush->paint_ramp)
1119                         memcpy(t_brush->paint_ramp, brush->paint_ramp, sizeof(ColorBand));
1120                 if (brush->vel_ramp)
1121                         memcpy(t_brush->vel_ramp, brush->vel_ramp, sizeof(ColorBand));
1122
1123                 t_brush->proximity_falloff = brush->proximity_falloff;
1124                 t_brush->wave_type = brush->wave_type;
1125                 t_brush->ray_dir = brush->ray_dir;
1126
1127                 t_brush->wave_factor = brush->wave_factor;
1128                 t_brush->wave_clamp = brush->wave_clamp;
1129                 t_brush->max_velocity = brush->max_velocity;
1130                 t_brush->smudge_strength = brush->smudge_strength;
1131         }
1132 }
1133
1134 /* allocates surface data depending on surface type */
1135 static void dynamicPaint_allocateSurfaceType(DynamicPaintSurface *surface)
1136 {
1137         PaintSurfaceData *sData = surface->data;
1138
1139         switch (surface->type) {
1140                 case MOD_DPAINT_SURFACE_T_PAINT:
1141                         sData->type_data = MEM_callocN(sizeof(PaintPoint)*sData->total_points, "DynamicPaintSurface Data");
1142                         break;
1143                 case MOD_DPAINT_SURFACE_T_DISPLACE:
1144                         sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface DepthData");
1145                         break;
1146                 case MOD_DPAINT_SURFACE_T_WEIGHT:
1147                         sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface WeightData");
1148                         break;
1149                 case MOD_DPAINT_SURFACE_T_WAVE:
1150                         sData->type_data = MEM_callocN(sizeof(PaintWavePoint)*sData->total_points, "DynamicPaintSurface WaveData");
1151                         break;
1152         }
1153
1154         if (sData->type_data == NULL) setError(surface->canvas, "Not enough free memory!");
1155 }
1156
1157 static int surface_usesAdjDistance(DynamicPaintSurface *surface)
1158 {
1159         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT && surface->effect) return 1;
1160         if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 1;
1161         return 0;
1162 }
1163
1164 static int surface_usesAdjData(DynamicPaintSurface *surface)
1165 {
1166         if (surface_usesAdjDistance(surface)) return 1;
1167         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
1168                 surface->flags & MOD_DPAINT_ANTIALIAS) return 1;
1169
1170         return 0;
1171 }
1172
1173 /* initialize surface adjacency data */
1174 static void dynamicPaint_initAdjacencyData(DynamicPaintSurface *surface, int force_init)
1175 {
1176         PaintSurfaceData *sData = surface->data;
1177         PaintAdjData *ed;
1178         int *temp_data;
1179         int neigh_points = 0;
1180
1181         if (!surface_usesAdjData(surface) && !force_init) return;
1182
1183         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1184                 /* For vertex format, neighbours are connected by edges */
1185                 neigh_points = 2*surface->canvas->dm->getNumEdges(surface->canvas->dm);
1186         }
1187         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ)
1188                 neigh_points = sData->total_points*8;
1189
1190         if (!neigh_points) return;
1191
1192         /* allocate memory */
1193         ed = sData->adj_data = MEM_callocN(sizeof(PaintAdjData), "Surface Adj Data");
1194         if (!ed) return;
1195         ed->n_index = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Index");
1196         ed->n_num = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Counts");
1197         temp_data = MEM_callocN(sizeof(int)*sData->total_points, "Temp Adj Data");
1198         ed->n_target = MEM_callocN(sizeof(int)*neigh_points, "Surface Adj Targets");
1199         ed->flags = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Flags");
1200         ed->total_targets = neigh_points;
1201
1202         /* in case of allocation error, free memory */
1203         if (!ed->n_index || !ed->n_num || !ed->n_target || !temp_data) {
1204                 dynamicPaint_freeAdjData(sData);
1205                 if (temp_data) MEM_freeN(temp_data);
1206                 setError(surface->canvas, "Not enough free memory.");
1207                 return;
1208         }
1209
1210         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1211                 int i;
1212                 int n_pos;
1213
1214                 /* For vertex format, count every vertex that is connected by an edge */
1215                 int numOfEdges = surface->canvas->dm->getNumEdges(surface->canvas->dm);
1216                 int numOfFaces = surface->canvas->dm->getNumFaces(surface->canvas->dm);
1217                 struct MEdge *edge =  surface->canvas->dm->getEdgeArray(surface->canvas->dm);
1218                 struct MFace *face =  surface->canvas->dm->getFaceArray(surface->canvas->dm);
1219
1220                 /* count number of edges per vertex */
1221                 for (i=0; i<numOfEdges; i++) {
1222                         ed->n_num[edge[i].v1]++;
1223                         ed->n_num[edge[i].v2]++;
1224
1225                         temp_data[edge[i].v1]++;
1226                         temp_data[edge[i].v2]++;
1227                 }
1228
1229                 /* to locate points on "mesh edge" */
1230                 for (i=0; i<numOfFaces; i++) {
1231                         temp_data[face[i].v1]++;
1232                         temp_data[face[i].v2]++;
1233                         temp_data[face[i].v3]++;
1234                         if (face[i].v4)
1235                                 temp_data[face[i].v4]++;
1236                 }
1237
1238                 /* now check if total number of edges+faces for
1239                 *  each vertex is even, if not -> vertex is on mesh edge */
1240                 for (i=0; i<sData->total_points; i++) {
1241                         if ((temp_data[i]%2) ||
1242                                 temp_data[i] < 4)
1243                                 ed->flags[i] |= ADJ_ON_MESH_EDGE;
1244
1245                         /* reset temp data */
1246                         temp_data[i] = 0;
1247                 }
1248
1249                 /* order n_index array */
1250                 n_pos = 0;
1251                 for (i=0; i<sData->total_points; i++) {
1252                         ed->n_index[i] = n_pos;
1253                         n_pos += ed->n_num[i];
1254                 }
1255
1256                 /* and now add neighbour data using that info */
1257                 for (i=0; i<numOfEdges; i++) {
1258                         /* first vertex */
1259                         int index = edge[i].v1;
1260                         n_pos = ed->n_index[index]+temp_data[index];
1261                         ed->n_target[n_pos] = edge[i].v2;
1262                         temp_data[index]++;
1263
1264                         /* second vertex */
1265                         index = edge[i].v2;
1266                         n_pos = ed->n_index[index]+temp_data[index];
1267                         ed->n_target[n_pos] = edge[i].v1;
1268                         temp_data[index]++;
1269                 }
1270         }
1271         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1272                 /* for image sequences, only allocate memory.
1273                 *  bake initialization takes care of rest */
1274         }
1275
1276         MEM_freeN(temp_data);
1277 }
1278
1279 void dynamicPaint_setInitialColor(DynamicPaintSurface *surface)
1280 {
1281         PaintSurfaceData *sData = surface->data;
1282         PaintPoint* pPoint = (PaintPoint*)sData->type_data;
1283         DerivedMesh *dm = surface->canvas->dm;
1284         int i;
1285
1286         if (surface->type != MOD_DPAINT_SURFACE_T_PAINT)
1287                 return;
1288
1289         if (surface->init_color_type == MOD_DPAINT_INITIAL_NONE)
1290                 return;
1291         /* Single color */
1292         else if (surface->init_color_type == MOD_DPAINT_INITIAL_COLOR) {
1293                 /* apply color to every surface point */
1294                 #pragma omp parallel for schedule(static)
1295                 for (i=0; i<sData->total_points; i++) {
1296                         copy_v3_v3(pPoint[i].color, surface->init_color);
1297                         pPoint[i].alpha = surface->init_color[3];
1298                 }
1299         }
1300         /* UV mapped texture */
1301         else if (surface->init_color_type == MOD_DPAINT_INITIAL_TEXTURE) {
1302                 Tex *tex = surface->init_texture;
1303                 MTFace *tface;
1304                 MFace *mface = dm->getFaceArray(dm);
1305                 int numOfFaces = dm->getNumFaces(dm);
1306                 char uvname[40];
1307
1308                 if (!tex) return;
1309
1310                 /* get uv layer */
1311                 CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->init_layername, uvname);
1312                 tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1313                 if (!tface) return;
1314
1315                 /* for vertex surface loop through tfaces and find uv color
1316                 *  that provides highest alpha */
1317                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1318                         #pragma omp parallel for schedule(static)
1319                         for (i=0; i<numOfFaces; i++) {
1320                                 int numOfVert = (mface[i].v4) ? 4 : 3;
1321                                 float uv[3] = {0.0f};
1322                                 int j;
1323                                 for (j=0; j<numOfVert; j++) {
1324                                         TexResult texres = {0};
1325                                         unsigned int *vert = (&mface[i].v1)+j;
1326
1327                                         /* remap to -1.0 to 1.0 */
1328                                         uv[0] = tface[i].uv[j][0]*2.0f - 1.0f;
1329                                         uv[1] = tface[i].uv[j][1]*2.0f - 1.0f;
1330
1331                                         multitex_ext_safe(tex, uv, &texres);
1332
1333                                         if (texres.tin > pPoint[*vert].alpha) {
1334                                                 copy_v3_v3(pPoint[*vert].color, &texres.tr);
1335                                                 pPoint[*vert].alpha = texres.tin;
1336                                         }
1337                                 }
1338                         }
1339                 }
1340                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1341                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
1342                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1343
1344                         #pragma omp parallel for schedule(static)
1345                         for (i=0; i<sData->total_points; i++) {
1346                                 float uv[9] = {0.0f};
1347                                 float uv_final[3] = {0.0f};
1348                                 int j;
1349                                 TexResult texres = {0};
1350
1351                                 /* collect all uvs */
1352                                 for (j=0; j<3; j++) {
1353                                         int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j;
1354                                         copy_v2_v2(&uv[j*3], tface[f_data->uv_p[i].face_index].uv[v]);
1355                                 }
1356
1357                                 /* interpolate final uv pos */
1358                                 interp_v3_v3v3v3(       uv_final, &uv[0], &uv[3], &uv[6],
1359                                         f_data->barycentricWeights[i*samples].v);
1360                                 /* remap to -1.0 to 1.0 */
1361                                 uv_final[0] = uv_final[0]*2.0f - 1.0f;
1362                                 uv_final[1] = uv_final[1]*2.0f - 1.0f;
1363
1364                                 multitex_ext_safe(tex, uv_final, &texres);
1365
1366                                 /* apply color */
1367                                 copy_v3_v3(pPoint[i].color, &texres.tr);
1368                                 pPoint[i].alpha = texres.tin;
1369                         }
1370                 }
1371         }
1372         /* vertex color layer */
1373         else if (surface->init_color_type == MOD_DPAINT_INITIAL_VERTEXCOLOR) {
1374                 MCol *col = CustomData_get_layer_named(&dm->faceData, CD_MCOL, surface->init_layername);
1375                 if (!col) return;
1376
1377                 /* for vertex surface, just copy colors from mcol */
1378                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1379                         MFace *mface = dm->getFaceArray(dm);
1380                         int numOfFaces = dm->getNumFaces(dm);
1381
1382                         #pragma omp parallel for schedule(static)
1383                         for (i=0; i<numOfFaces; i++) {
1384                                 int numOfVert = (mface[i].v4) ? 4 : 3;
1385                                 int j;
1386                                 for (j=0; j<numOfVert; j++) {
1387                                         unsigned int *vert = ((&mface[i].v1)+j);
1388
1389                                         pPoint[*vert].color[0] = 1.0f/255.f*(float)col[i*4+j].b;
1390                                         pPoint[*vert].color[1] = 1.0f/255.f*(float)col[i*4+j].g;
1391                                         pPoint[*vert].color[2] = 1.0f/255.f*(float)col[i*4+j].r;
1392                                         pPoint[*vert].alpha = 1.0f/255.f*(float)col[i*4+j].a;
1393                                 }
1394                         }
1395                 }
1396                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1397                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
1398                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1399
1400                         #pragma omp parallel for schedule(static)
1401                         for (i=0; i<sData->total_points; i++) {
1402                                 int face_ind = f_data->uv_p[i].face_index;
1403                                 float colors[3][4] = {{0.0f,0.0f,0.0f,0.0f}};
1404                                 float final_color[4];
1405                                 int j;
1406                                 /* collect color values */
1407                                 for (j=0; j<3; j++) {
1408                                         int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j;
1409                                         colors[j][0] = 1.0f/255.f*(float)col[face_ind*4+v].b;
1410                                         colors[j][1] = 1.0f/255.f*(float)col[face_ind*4+v].g;
1411                                         colors[j][2] = 1.0f/255.f*(float)col[face_ind*4+v].r;
1412                                         colors[j][3] = 1.0f/255.f*(float)col[face_ind*4+v].a;
1413                                 }
1414
1415                                 /* interpolate final color */
1416                                 interp_v4_v4v4v4(       final_color, colors[0], colors[1], colors[2],
1417                                                 f_data->barycentricWeights[i*samples].v);
1418
1419                                 copy_v3_v3(pPoint[i].color, final_color);
1420                                 pPoint[i].alpha = final_color[3];
1421                         }
1422                 }
1423         }
1424 }
1425
1426 /* clears surface data back to zero */
1427 void dynamicPaint_clearSurface(DynamicPaintSurface *surface)
1428 {
1429         PaintSurfaceData *sData = surface->data;
1430         if (sData && sData->type_data) {
1431                 unsigned int data_size;
1432
1433                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1434                         data_size = sizeof(PaintPoint);
1435                 else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE)
1436                         data_size = sizeof(PaintWavePoint);
1437                 else
1438                         data_size = sizeof(float);
1439
1440                 memset(sData->type_data, 0, data_size * sData->total_points);
1441
1442                 /* set initial color */
1443                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1444                         dynamicPaint_setInitialColor(surface);
1445
1446                 if (sData->bData)
1447                         sData->bData->clear = 1;
1448         }
1449 }
1450
1451 /* completely (re)initializes surface (only for point cache types)*/
1452 int dynamicPaint_resetSurface(DynamicPaintSurface *surface)
1453 {
1454         int numOfPoints = dynamicPaint_surfaceNumOfPoints(surface);
1455         /* dont touch image sequence types. they get handled only on bake */
1456         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 1;
1457
1458         if (surface->data) dynamicPaint_freeSurfaceData(surface);
1459         if (numOfPoints < 1) return 0;
1460
1461         /* allocate memory */
1462         surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
1463         if (!surface->data) return 0;
1464
1465         /* allocate data depending on surface type and format */
1466         surface->data->total_points = numOfPoints;
1467         dynamicPaint_allocateSurfaceType(surface);
1468         dynamicPaint_initAdjacencyData(surface, 0);
1469
1470         /* set initial color */
1471         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1472                 dynamicPaint_setInitialColor(surface);
1473
1474         return 1;
1475 }
1476
1477 /* make sure allocated surface size matches current requirements */
1478 static void dynamicPaint_checkSurfaceData(DynamicPaintSurface *surface)
1479 {
1480         if (!surface->data || ((dynamicPaint_surfaceNumOfPoints(surface) != surface->data->total_points))) {
1481                 dynamicPaint_resetSurface(surface);
1482         }
1483 }
1484
1485
1486 /***************************** Modifier processing ******************************/
1487
1488
1489 /* apply displacing vertex surface to the derived mesh */
1490 static void dynamicPaint_applySurfaceDisplace(DynamicPaintSurface *surface, DerivedMesh *result, int update_normals)
1491 {
1492         PaintSurfaceData *sData = surface->data;
1493
1494         if (!sData || surface->format != MOD_DPAINT_SURFACE_F_VERTEX) return;
1495
1496         /* displace paint */
1497         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
1498                 MVert *mvert = result->getVertArray(result);
1499                 int i;
1500                 float* value = (float*)sData->type_data;
1501
1502                 #pragma omp parallel for schedule(static)
1503                 for (i=0; i<sData->total_points; i++) {
1504                         float normal[3], val=value[i]*surface->disp_factor;
1505                         normal_short_to_float_v3(normal, mvert[i].no);
1506                         normalize_v3(normal);
1507
1508                         mvert[i].co[0] -= normal[0]*val;
1509                         mvert[i].co[1] -= normal[1]*val;
1510                         mvert[i].co[2] -= normal[2]*val;
1511                 }
1512         }
1513         else return;
1514
1515         if (update_normals)
1516                 CDDM_calc_normals(result);
1517 }
1518
1519 /*
1520 *       Apply canvas data to the object derived mesh
1521 */
1522 static struct DerivedMesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd,
1523                                                        Object *ob,
1524                                                        DerivedMesh *dm)
1525 {
1526         DerivedMesh *result = CDDM_copy(dm);
1527
1528         if(pmd->canvas && !(pmd->canvas->flags & MOD_DPAINT_BAKING)) {
1529
1530                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
1531                 pmd->canvas->flags &= ~MOD_DPAINT_PREVIEW_READY;
1532
1533                 /* loop through surfaces */
1534                 for (; surface; surface=surface->next) {
1535                         PaintSurfaceData *sData = surface->data;
1536
1537                         if (surface && surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ && sData) {
1538                                 if (!(surface->flags & (MOD_DPAINT_ACTIVE))) continue;
1539
1540                                 /* process vertex surface previews */
1541                                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1542
1543                                         /* vertex color paint */
1544                                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
1545
1546                                                 MFace *mface = result->getFaceArray(result);
1547                                                 int numOfFaces = result->getNumFaces(result);
1548                                                 int i;
1549                                                 PaintPoint* pPoint = (PaintPoint*)sData->type_data;
1550                                                 MCol *col;
1551
1552                                                 /* paint is stored on dry and wet layers, so mix final color first */
1553                                                 float *fcolor = MEM_callocN(sizeof(float)*sData->total_points*4, "Temp paint color");
1554
1555                                                 #pragma omp parallel for schedule(static)
1556                                                 for (i=0; i<sData->total_points; i++) {
1557                                                         /* blend dry and wet layer */
1558                                                         blendColors(pPoint[i].color, pPoint[i].alpha, pPoint[i].e_color, pPoint[i].e_alpha, &fcolor[i*4]);
1559                                                 }
1560
1561                                                 /* viewport preview */
1562                                                 if (surface->flags & MOD_DPAINT_PREVIEW) {
1563                                                         /* Save preview results to weight layer, to be
1564                                                         *   able to share same drawing methods */
1565                                                         col = result->getFaceDataArray(result, CD_WEIGHT_MCOL);
1566                                                         if (!col) col = CustomData_add_layer(&result->faceData, CD_WEIGHT_MCOL, CD_CALLOC, NULL, numOfFaces);
1567
1568                                                         if (col) {
1569                                                                 #pragma omp parallel for schedule(static)
1570                                                                 for (i=0; i<numOfFaces; i++) {
1571                                                                         int j=0;
1572                                                                         Material *material = give_current_material(ob, mface[i].mat_nr+1);
1573
1574                                                                         for (; j<((mface[i].v4)?4:3); j++) {
1575                                                                                 int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4;
1576
1577                                                                                 if (surface->preview_id == MOD_DPAINT_SURFACE_PREV_PAINT) {
1578                                                                                         float c[3];
1579                                                                                         index *= 4;
1580
1581                                                                                         /* Apply material color as base vertex color for preview */
1582                                                                                         col[i*4+j].a = 255;
1583                                                                                         if (material) {
1584                                                                                                 c[0] = material->r;
1585                                                                                                 c[1] = material->g;
1586                                                                                                 c[2] = material->b;
1587                                                                                         }
1588                                                                                         else { /* default grey */
1589                                                                                                 c[0] = 0.65f;
1590                                                                                                 c[1] = 0.65f;
1591                                                                                                 c[2] = 0.65f;
1592                                                                                         }
1593                                                                                         /* mix surface color */
1594                                                                                         interp_v3_v3v3(c, c, &fcolor[index], fcolor[index+3]);
1595
1596                                                                                         col[i*4+j].r = FTOCHAR(c[2]);
1597                                                                                         col[i*4+j].g = FTOCHAR(c[1]);
1598                                                                                         col[i*4+j].b = FTOCHAR(c[0]);
1599                                                                                 }
1600                                                                                 else {
1601                                                                                         col[i*4+j].a = 255;
1602                                                                                         col[i*4+j].r = FTOCHAR(pPoint[index].wetness);
1603                                                                                         col[i*4+j].g = FTOCHAR(pPoint[index].wetness);
1604                                                                                         col[i*4+j].b = FTOCHAR(pPoint[index].wetness);
1605                                                                                 }
1606                                                                         }
1607                                                                 }
1608                                                                 pmd->canvas->flags |= MOD_DPAINT_PREVIEW_READY;
1609                                                         }
1610                                                 }
1611
1612
1613                                                 /* save layer data to output layer */
1614
1615                                                 /* paint layer */
1616                                                 col = CustomData_get_layer_named(&result->faceData, CD_MCOL, surface->output_name);
1617                                                 if (col) {
1618                                                         #pragma omp parallel for schedule(static)
1619                                                         for (i=0; i<numOfFaces; i++) {
1620                                                                 int j=0;
1621                                                                 for (; j<((mface[i].v4)?4:3); j++) {
1622                                                                         int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4;
1623                                                                         index *= 4;
1624
1625                                                                         col[i*4+j].a = FTOCHAR(fcolor[index+3]);
1626                                                                         col[i*4+j].r = FTOCHAR(fcolor[index+2]);
1627                                                                         col[i*4+j].g = FTOCHAR(fcolor[index+1]);
1628                                                                         col[i*4+j].b = FTOCHAR(fcolor[index]);
1629                                                                 }
1630                                                         }
1631                                                 }
1632
1633                                                 MEM_freeN(fcolor);
1634
1635                                                 /* wet layer */
1636                                                 col = CustomData_get_layer_named(&result->faceData, CD_MCOL, surface->output_name2);
1637                                                 if (col) {
1638                                                         #pragma omp parallel for schedule(static)
1639                                                         for (i=0; i<numOfFaces; i++) {
1640                                                                 int j=0;
1641
1642                                                                 for (; j<((mface[i].v4)?4:3); j++) {
1643                                                                         int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4;
1644                                                                         col[i*4+j].a = 255;
1645                                                                         col[i*4+j].r = FTOCHAR(pPoint[index].wetness);
1646                                                                         col[i*4+j].g = FTOCHAR(pPoint[index].wetness);
1647                                                                         col[i*4+j].b = FTOCHAR(pPoint[index].wetness);
1648                                                                 }
1649                                                         }
1650                                                 }
1651                                         }
1652                                         /* vertex group paint */
1653                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
1654                                                 int defgrp_index = defgroup_name_index(ob, surface->output_name);
1655                                                 MDeformVert *dvert = result->getVertDataArray(result, CD_MDEFORMVERT);
1656                                                 float *weight = (float*)sData->type_data;
1657                                                 /* viewport preview */
1658                                                 if (surface->flags & MOD_DPAINT_PREVIEW) {
1659                                                         /* Save preview results to weight layer, to be
1660                                                         *   able to share same drawing methods */
1661                                                         MFace *mface = result->getFaceArray(result);
1662                                                         int numOfFaces = result->getNumFaces(result);
1663                                                         int i;
1664                                                         MCol *col = result->getFaceDataArray(result, CD_WEIGHT_MCOL);
1665                                                         if (!col) col = CustomData_add_layer(&result->faceData, CD_WEIGHT_MCOL, CD_CALLOC, NULL, numOfFaces);
1666
1667                                                         if (col) {
1668                                                                 #pragma omp parallel for schedule(static)
1669                                                                 for (i=0; i<numOfFaces; i++) {
1670                                                                         float temp_color[3];
1671                                                                         int j=0;
1672                                                                         for (; j<((mface[i].v4)?4:3); j++) {
1673                                                                                 int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4;
1674
1675                                                                                 weight_to_rgb(weight[index], temp_color, temp_color+1, temp_color+2);
1676                                                                                 col[i*4+j].r = FTOCHAR(temp_color[2]);
1677                                                                                 col[i*4+j].g = FTOCHAR(temp_color[1]);
1678                                                                                 col[i*4+j].b = FTOCHAR(temp_color[0]);
1679                                                                                 col[i*4+j].a = 255;
1680                                                                         }
1681                                                                 }
1682                                                                 pmd->canvas->flags |= MOD_DPAINT_PREVIEW_READY;
1683                                                         }
1684                                                 }
1685
1686                                                 /* apply weights into a vertex group, if doesnt exists add a new layer */
1687                                                 if (defgrp_index >= 0 && !dvert && strlen(surface->output_name)>0)
1688                                                         dvert = CustomData_add_layer_named(&result->vertData, CD_MDEFORMVERT, CD_CALLOC,
1689                                                                                                                                 NULL, sData->total_points, surface->output_name);
1690                                                 if (defgrp_index >= 0 && dvert) {
1691                                                         int i;
1692                                                         for(i=0; i<sData->total_points; i++) {
1693                                                                 MDeformVert *dv= &dvert[i];
1694                                                                 MDeformWeight *def_weight = defvert_find_index(dv, defgrp_index);
1695
1696                                                                 /* skip if weight value is 0 and no existing weight is found */
1697                                                                 if (!def_weight && !weight[i])
1698                                                                         continue;
1699
1700                                                                 /* if not found, add a weight for it */
1701                                                                 if (!def_weight) {
1702                                                                         MDeformWeight *newdw = MEM_callocN(sizeof(MDeformWeight)*(dv->totweight+1),
1703                                                                                                                  "deformWeight");
1704                                                                         if(dv->dw){
1705                                                                                 memcpy(newdw, dv->dw, sizeof(MDeformWeight)*dv->totweight);
1706                                                                                 MEM_freeN(dv->dw);
1707                                                                         }
1708                                                                         dv->dw=newdw;
1709                                                                         dv->dw[dv->totweight].def_nr=defgrp_index;
1710                                                                         def_weight = &dv->dw[dv->totweight];
1711                                                                         dv->totweight++;
1712                                                                 }
1713
1714                                                                 /* set weight value */
1715                                                                 def_weight->weight = weight[i];
1716                                                         }
1717                                                 }
1718                                         }
1719                                         /* wave simulation */
1720                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
1721                                                 MVert *mvert = result->getVertArray(result);
1722                                                 int i;
1723                                                 PaintWavePoint* wPoint = (PaintWavePoint*)sData->type_data;
1724
1725                                                 #pragma omp parallel for schedule(static)
1726                                                 for (i=0; i<sData->total_points; i++) {
1727                                                         float normal[3];
1728                                                         normal_short_to_float_v3(normal, mvert[i].no);
1729                                                         normalize_v3(normal);
1730
1731                                                         mvert[i].co[0] += normal[0]*wPoint[i].height;
1732                                                         mvert[i].co[1] += normal[1]*wPoint[i].height;
1733                                                         mvert[i].co[2] += normal[2]*wPoint[i].height;
1734                                                 }
1735                                                 CDDM_calc_normals(result);
1736                                         }
1737
1738                                         /* displace */
1739                                         dynamicPaint_applySurfaceDisplace(surface, result, 1);
1740                                 }
1741                         }
1742                 }
1743         }
1744         /* make a copy of dm to use as brush data */
1745         if (pmd->brush) {
1746                 if (pmd->brush->dm) pmd->brush->dm->release(pmd->brush->dm);
1747                 pmd->brush->dm = CDDM_copy(result);
1748         }
1749
1750         return result;
1751 }
1752
1753 /* update cache frame range */
1754 void dynamicPaint_cacheUpdateFrames(DynamicPaintSurface *surface)
1755 {
1756         if (surface->pointcache) {
1757                 surface->pointcache->startframe = surface->start_frame;
1758                 surface->pointcache->endframe = surface->end_frame;
1759         }
1760 }
1761
1762 void canvas_copyDerivedMesh(DynamicPaintCanvasSettings *canvas, DerivedMesh *dm)
1763 {
1764         if (canvas->dm) canvas->dm->release(canvas->dm);
1765         canvas->dm = CDDM_copy(dm);
1766 }
1767
1768 /*
1769 *       Updates derived mesh copy and processes dynamic paint step / caches.
1770 */
1771 static void dynamicPaint_frameUpdate(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1772 {
1773         if(pmd->canvas) {
1774                 DynamicPaintCanvasSettings *canvas = pmd->canvas;
1775                 DynamicPaintSurface *surface = canvas->surfaces.first;
1776
1777                 /* update derived mesh copy */
1778                 canvas_copyDerivedMesh(canvas, dm);
1779
1780                 /* in case image sequence baking, stop here */
1781                 if (canvas->flags & MOD_DPAINT_BAKING) return;
1782
1783                 /* loop through surfaces */
1784                 for (; surface; surface=surface->next) {
1785                         int current_frame = (int)scene->r.cfra;
1786
1787                         /* free bake data if not required anymore */
1788                         surface_freeUnusedData(surface);
1789
1790                         /* image sequences are handled by bake operator */
1791                         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) continue;
1792                         if (!(surface->flags & MOD_DPAINT_ACTIVE)) continue;
1793
1794                         /* make sure surface is valid */
1795                         dynamicPaint_checkSurfaceData(surface);
1796
1797                         /* limit frame range */
1798                         CLAMP(current_frame, surface->start_frame, surface->end_frame);
1799
1800                         if (current_frame != surface->current_frame || (int)scene->r.cfra == surface->start_frame) {
1801                                 PointCache *cache = surface->pointcache;
1802                                 PTCacheID pid;
1803                                 surface->current_frame = current_frame;
1804
1805                                 /* read point cache */
1806                                 BKE_ptcache_id_from_dynamicpaint(&pid, ob, surface);
1807                                 pid.cache->startframe = surface->start_frame;
1808                                 pid.cache->endframe = surface->end_frame;
1809                                 BKE_ptcache_id_time(&pid, scene, (float)scene->r.cfra, NULL, NULL, NULL);
1810
1811                                 /* reset non-baked cache at first frame */
1812                                 if((int)scene->r.cfra == surface->start_frame && !(cache->flag & PTCACHE_BAKED))
1813                                 {
1814                                         cache->flag |= PTCACHE_REDO_NEEDED;
1815                                         BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
1816                                         cache->flag &= ~PTCACHE_REDO_NEEDED;
1817                                 }
1818
1819                                 /* try to read from cache */
1820                                 if(BKE_ptcache_read(&pid, (float)scene->r.cfra)) {
1821                                         BKE_ptcache_validate(cache, (int)scene->r.cfra);
1822                                 }
1823                                 /* if read failed and we're on surface range do recalculate */
1824                                 else if ((int)scene->r.cfra == current_frame
1825                                         && !(cache->flag & PTCACHE_BAKED)) {
1826                                         /* calculate surface frame */
1827                                         canvas->flags |= MOD_DPAINT_BAKING;
1828                                         dynamicPaint_calculateFrame(surface, scene, ob, current_frame);
1829                                         canvas->flags &= ~MOD_DPAINT_BAKING;
1830
1831                                         /* restore canvas derivedmesh if required */
1832                                         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE &&
1833                                                 surface->flags & MOD_DPAINT_DISP_INCREMENTAL && surface->next)
1834                                                 canvas_copyDerivedMesh(canvas, dm);
1835
1836                                         BKE_ptcache_validate(cache, surface->current_frame);
1837                                         BKE_ptcache_write(&pid, surface->current_frame);
1838                                 }
1839                         }
1840                 }
1841         }
1842 }
1843
1844 /* Modifier call. Processes dynamic paint modifier step. */
1845 struct DerivedMesh *dynamicPaint_Modifier_do(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1846 {
1847         /* Update canvas data for a new frame */
1848         dynamicPaint_frameUpdate(pmd, scene, ob, dm);
1849
1850         /* Return output mesh */
1851         return dynamicPaint_Modifier_apply(pmd, ob, dm);
1852 }
1853
1854
1855 /***************************** Image Sequence / UV Image Surface Calls ******************************/
1856
1857 /*
1858 *       Tries to find the neighbouring pixel in given (uv space) direction.
1859 *       Result is used by effect system to move paint on the surface.
1860 *
1861 *   px,py : origin pixel x and y
1862 *       n_index : lookup direction index (use neighX,neighY to get final index)
1863 */
1864 static int dynamicPaint_findNeighbourPixel(PaintUVPoint *tempPoints, DerivedMesh *dm, char *uvname, int w, int h, int px, int py, int n_index)
1865 {
1866         /* Note: Current method only uses polygon edges to detect neighbouring pixels.
1867         *  -> It doesn't always lead to the optimum pixel but is accurate enough
1868         *  and faster/simplier than including possible face tip point links)
1869         */
1870
1871         int x,y;
1872         PaintUVPoint *tPoint = NULL;
1873         PaintUVPoint *cPoint = NULL;
1874
1875         /* shift position by given n_index */
1876         x = px + neighX[n_index];
1877         y = py + neighY[n_index];
1878
1879         if (x<0 || x>=w) return -1;
1880         if (y<0 || y>=h) return -1;
1881
1882         tPoint = &tempPoints[x+w*y];            /* UV neighbour */
1883         cPoint = &tempPoints[px+w*py];          /* Origin point */
1884
1885         /*
1886         *       Check if shifted point is on same face -> it's a correct neighbour
1887         *   (and if it isn't marked as an "edge pixel")
1888         */
1889         if ((tPoint->face_index == cPoint->face_index) && (tPoint->neighbour_pixel == -1))
1890                 return (x+w*y);
1891
1892         /*
1893         *       Even if shifted point is on another face
1894         *       -> use this point.
1895         *
1896         *       !! Replace with "is uv faces linked" check !!
1897         *       This should work fine as long as uv island
1898         *       margin is > 1 pixel.
1899         */
1900         if ((tPoint->face_index != -1) && (tPoint->neighbour_pixel == -1)) {
1901                 return (x+w*y);
1902         }
1903
1904         /*
1905         *       If we get here, the actual neighbouring pixel
1906         *       is located on a non-linked uv face, and we have to find
1907         *       it's "real" position.
1908         *
1909         *       Simple neighbouring face finding algorithm:
1910         *       - find closest uv edge to shifted pixel and get
1911         *         the another face that shares that edge
1912         *       - find corresponding position of that new face edge
1913         *         in uv space
1914         *
1915         *       TODO: Implement something more accurate / optimized?
1916         */
1917         {
1918                 int numOfFaces = dm->getNumFaces(dm);
1919                 MFace *mface = dm->getFaceArray(dm);
1920                 MTFace *tface =  CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1921
1922                 /* Get closest edge to that subpixel on UV map  */
1923                 {
1924                         float pixel[2], dist, t_dist;
1925                         int i, uindex[3], edge1_index, edge2_index,
1926                                 e1_index, e2_index, target_face;
1927                         float closest_point[2], lambda, dir_vec[2];
1928                         int target_uv1, target_uv2, final_pixel[2], final_index;
1929
1930                         float *s_uv1, *s_uv2, *t_uv1, *t_uv2;
1931
1932                         pixel[0] = ((float)(px + neighX[n_index]) + 0.5f) / (float)w;
1933                         pixel[1] = ((float)(py + neighY[n_index]) + 0.5f) / (float)h;
1934
1935                         /* Get uv indexes for current face part */
1936                         if (cPoint->quad) {
1937                                 uindex[0] = 0; uindex[1] = 2; uindex[2] = 3;
1938                         }
1939                         else {
1940                                 uindex[0] = 0; uindex[1] = 1; uindex[2] = 2;
1941                         }
1942
1943                         /*
1944                         *       Find closest edge to that pixel
1945                         */
1946                         /* Dist to first edge   */
1947                         e1_index = cPoint->v1; e2_index = cPoint->v2; edge1_index = uindex[0]; edge2_index = uindex[1];
1948                         dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
1949
1950                         /* Dist to second edge  */
1951                         t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[1]], tface[cPoint->face_index].uv[uindex[2]]);
1952                         if (t_dist < dist) {e1_index = cPoint->v2; e2_index = cPoint->v3; edge1_index = uindex[1]; edge2_index = uindex[2]; dist = t_dist;}
1953
1954                         /* Dist to third edge   */
1955                         t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[2]], tface[cPoint->face_index].uv[uindex[0]]);
1956                         if (t_dist < dist) {e1_index = cPoint->v3; e2_index = cPoint->v1;  edge1_index = uindex[2]; edge2_index = uindex[0]; dist = t_dist;}
1957
1958
1959                         /*
1960                         *       Now find another face that is linked to that edge
1961                         */
1962                         target_face = -1;
1963
1964                         for (i=0; i<numOfFaces; i++) {
1965                                 /*
1966                                 *       Check if both edge vertices share this face
1967                                 */
1968                                 int v4 = (mface[i].v4) ? mface[i].v4 : -1;
1969
1970                                 if ((e1_index == mface[i].v1 || e1_index == mface[i].v2 || e1_index == mface[i].v3 || e1_index == v4) &&
1971                                         (e2_index == mface[i].v1 || e2_index == mface[i].v2 || e2_index == mface[i].v3 || e2_index == v4)) {
1972                                         if (i == cPoint->face_index) continue;
1973
1974                                         target_face = i;
1975
1976                                         /*
1977                                         *       Get edge UV index
1978                                         */
1979                                         if (e1_index == mface[i].v1) target_uv1 = 0;
1980                                         else if (e1_index == mface[i].v2) target_uv1 = 1;
1981                                         else if (e1_index == mface[i].v3) target_uv1 = 2;
1982                                         else target_uv1 = 3;
1983
1984                                         if (e2_index == mface[i].v1) target_uv2 = 0;
1985                                         else if (e2_index == mface[i].v2) target_uv2 = 1;
1986                                         else if (e2_index == mface[i].v3) target_uv2 = 2;
1987                                         else target_uv2 = 3;
1988
1989                                         break;
1990                                 }
1991                         }
1992
1993                         /* If none found return -1      */
1994                         if (target_face == -1) return -1;
1995
1996                         /*
1997                         *       If target face is connected in UV space as well, just use original index
1998                         */
1999                         s_uv1 = (float *)tface[cPoint->face_index].uv[edge1_index];
2000                         s_uv2 = (float *)tface[cPoint->face_index].uv[edge2_index];
2001                         t_uv1 = (float *)tface[target_face].uv[target_uv1];
2002                         t_uv2 = (float *)tface[target_face].uv[target_uv2];
2003
2004                         //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]);
2005
2006                         if (((s_uv1[0] == t_uv1[0] && s_uv1[1] == t_uv1[1]) &&
2007                                  (s_uv2[0] == t_uv2[0] && s_uv2[1] == t_uv2[1]) ) ||
2008                                 ((s_uv2[0] == t_uv1[0] && s_uv2[1] == t_uv1[1]) &&
2009                                  (s_uv1[0] == t_uv2[0] && s_uv1[1] == t_uv2[1]) )) return ((px+neighX[n_index]) + w*(py+neighY[n_index]));
2010
2011                         /*
2012                         *       Find a point that is relatively at same edge position
2013                         *       on this other face UV
2014                         */
2015                         lambda = closest_to_line_v2(closest_point, pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
2016                         if (lambda < 0.0f) lambda = 0.0f;
2017                         if (lambda > 1.0f) lambda = 1.0f;
2018
2019                         sub_v2_v2v2(dir_vec, tface[target_face].uv[target_uv2], tface[target_face].uv[target_uv1]);
2020
2021                         mul_v2_fl(dir_vec, lambda);
2022
2023                         copy_v2_v2(pixel, tface[target_face].uv[target_uv1]);
2024                         add_v2_v2(pixel, dir_vec);
2025                         pixel[0] = (pixel[0] * (float)w) - 0.5f;
2026                         pixel[1] = (pixel[1] * (float)h) - 0.5f;
2027
2028                         final_pixel[0] = (int)floor(pixel[0]);
2029                         final_pixel[1] = (int)floor(pixel[1]);
2030
2031                         /* If current pixel uv is outside of texture    */
2032                         if (final_pixel[0] < 0 || final_pixel[0] >= w) return -1;
2033                         if (final_pixel[1] < 0 || final_pixel[1] >= h) return -1;
2034
2035                         final_index = final_pixel[0] + w * final_pixel[1];
2036
2037                         /* If we ended up to our origin point ( mesh has smaller than pixel sized faces)        */
2038                         if (final_index == (px+w*py)) return -1;
2039                         /* If found pixel still lies on wrong face ( mesh has smaller than pixel sized faces)   */
2040                         if (tempPoints[final_index].face_index != target_face) return -1;
2041
2042                         /*
2043                         *       If final point is an "edge pixel", use it's "real" neighbour instead
2044                         */
2045                         if (tempPoints[final_index].neighbour_pixel != -1) final_index = cPoint->neighbour_pixel;
2046
2047                         return final_index;
2048                 }
2049         }
2050 }
2051
2052 /*
2053 *       Create a surface for uv image sequence format
2054 */
2055 int dynamicPaint_createUVSurface(DynamicPaintSurface *surface)
2056 {
2057         /* Antialias jitter point relative coords       */
2058         float jitter5sample[10] =  {0.0f, 0.0f,
2059                                                         -0.2f, -0.4f,
2060                                                         0.2f, 0.4f,
2061                                                         0.4f, -0.2f,
2062                                                         -0.4f, 0.3f};
2063         int ty;
2064         int w,h;
2065         int numOfFaces;
2066         char uvname[32];
2067         int active_points = 0;
2068         int error = 0;
2069
2070         PaintSurfaceData *sData;
2071         DynamicPaintCanvasSettings *canvas = surface->canvas;
2072         DerivedMesh *dm = canvas->dm;
2073
2074         PaintUVPoint *tempPoints = NULL;
2075         Vec3f *tempWeights = NULL;
2076         MFace *mface = NULL;
2077         MTFace *tface = NULL;
2078         Bounds2D *faceBB = NULL;
2079         int *final_index;
2080         int aa_samples;
2081
2082         if (!dm) return setError(canvas, "Canvas mesh not updated.");
2083         if (surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ) return setError(canvas, "Can't bake non-\"image sequence\" formats.");
2084
2085         numOfFaces = dm->getNumFaces(dm);
2086         mface = dm->getFaceArray(dm);
2087
2088         /* get uv layer */
2089         CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->uvlayer_name, uvname);
2090         tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
2091
2092         /* Check for validity   */
2093         if (!tface) return setError(canvas, "No UV data on canvas.");
2094         if (surface->image_resolution < 16 || surface->image_resolution > 8192) return setError(canvas, "Invalid resolution.");
2095
2096         w = h = surface->image_resolution;
2097
2098         /*
2099         *       Start generating the surface
2100         */
2101         printf("DynamicPaint: Preparing UV surface of %ix%i pixels and %i faces.\n", w, h, numOfFaces);
2102
2103         /* Init data struct */
2104         if (surface->data) dynamicPaint_freeSurfaceData(surface);
2105         sData = surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
2106         if (!surface->data) return setError(canvas, "Not enough free memory.");
2107
2108         aa_samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
2109         tempPoints = (struct PaintUVPoint *) MEM_callocN(w*h*sizeof(struct PaintUVPoint), "Temp PaintUVPoint");
2110         if (!tempPoints) error=1;
2111
2112         final_index = (int *) MEM_callocN(w*h*sizeof(int), "Temp UV Final Indexes");
2113         if (!final_index) error=1;
2114
2115         tempWeights = (struct Vec3f *) MEM_mallocN(w*h*aa_samples*sizeof(struct Vec3f), "Temp bWeights");
2116         if (!tempWeights) error=1;
2117
2118         /*
2119         *       Generate a temporary bounding box array for UV faces to optimize
2120         *       the pixel-inside-a-face search.
2121         */
2122         if (!error) {
2123                 faceBB = (struct Bounds2D *) MEM_mallocN(numOfFaces*sizeof(struct Bounds2D), "MPCanvasFaceBB");
2124                 if (!faceBB) error=1;
2125         }
2126
2127         if (!error)
2128         for (ty=0; ty<numOfFaces; ty++) {
2129                 int numOfVert = (mface[ty].v4) ? 4 : 3;
2130                 int i;
2131
2132                 copy_v2_v2(faceBB[ty].min, tface[ty].uv[0]);
2133                 copy_v2_v2(faceBB[ty].max, tface[ty].uv[0]);
2134
2135                 for (i = 1; i<numOfVert; i++) {
2136                         if (tface[ty].uv[i][0] < faceBB[ty].min[0]) faceBB[ty].min[0] = tface[ty].uv[i][0];
2137                         if (tface[ty].uv[i][1] < faceBB[ty].min[1]) faceBB[ty].min[1] = tface[ty].uv[i][1];
2138                         if (tface[ty].uv[i][0] > faceBB[ty].max[0]) faceBB[ty].max[0] = tface[ty].uv[i][0];
2139                         if (tface[ty].uv[i][1] > faceBB[ty].max[1]) faceBB[ty].max[1] = tface[ty].uv[i][1];
2140
2141                 }
2142         }
2143
2144         /*
2145         *       Loop through every pixel and check
2146         *       if pixel is uv-mapped on a canvas face.
2147         */
2148         if (!error) {
2149                 #pragma omp parallel for schedule(static)
2150                 for (ty = 0; ty < h; ty++)
2151                 {
2152                         int tx;
2153                         for (tx = 0; tx < w; tx++)
2154                         {
2155                                 int i, sample;
2156                                 int index = tx+w*ty;
2157                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2158
2159                                 short isInside = 0;     /* if point is inside a uv face */
2160
2161                                 float d1[2], d2[2], d3[2], point[5][2];
2162                                 float dot00,dot01,dot02,dot11,dot12, invDenom, u,v;
2163
2164                                 /* Init per pixel settings */
2165                                 tPoint->face_index = -1;
2166                                 tPoint->neighbour_pixel = -1;
2167                                 tPoint->pixel_index = index;
2168
2169                                 /* Actual pixel center, used when collision is found    */
2170                                 point[0][0] = ((float)tx + 0.5f) / w;
2171                                 point[0][1] = ((float)ty + 0.5f) / h;
2172
2173                                 /*
2174                                 * A pixel middle sample isn't enough to find very narrow polygons
2175                                 * So using 4 samples of each corner too
2176                                 */
2177                                 point[1][0] = ((float)tx) / w;
2178                                 point[1][1] = ((float)ty) / h;
2179
2180                                 point[2][0] = ((float)tx+1) / w;
2181                                 point[2][1] = ((float)ty) / h;
2182
2183                                 point[3][0] = ((float)tx) / w;
2184                                 point[3][1] = ((float)ty+1) / h;
2185
2186                                 point[4][0] = ((float)tx+1) / w;
2187                                 point[4][1] = ((float)ty+1) / h;
2188
2189
2190                                 /* Loop through samples, starting from middle point     */
2191                                 for (sample=0; sample<5; sample++) {
2192
2193                                         /* Loop through every face in the mesh  */
2194                                         for (i=0; i<numOfFaces; i++) {
2195
2196                                                 /* Check uv bb  */
2197                                                 if (faceBB[i].min[0] > (point[sample][0])) continue;
2198                                                 if (faceBB[i].min[1] > (point[sample][1])) continue;
2199                                                 if (faceBB[i].max[0] < (point[sample][0])) continue;
2200                                                 if (faceBB[i].max[1] < (point[sample][1])) continue;
2201
2202                                                 /*  Calculate point inside a triangle check
2203                                                 *       for uv0,1,2 */
2204                                                 sub_v2_v2v2(d1,  tface[i].uv[2], tface[i].uv[0]);       // uv2 - uv0
2205                                                 sub_v2_v2v2(d2,  tface[i].uv[1], tface[i].uv[0]);       // uv1 - uv0
2206                                                 sub_v2_v2v2(d3,  point[sample], tface[i].uv[0]);        // point - uv0
2207
2208                                                 dot00 = d1[0]*d1[0] + d1[1]*d1[1];
2209                                                 dot01 = d1[0]*d2[0] + d1[1]*d2[1];
2210                                                 dot02 = d1[0]*d3[0] + d1[1]*d3[1];
2211                                                 dot11 = d2[0]*d2[0] + d2[1]*d2[1];
2212                                                 dot12 = d2[0]*d3[0] + d2[1]*d3[1];
2213
2214                                                 invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
2215                                                 u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2216                                                 v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2217
2218                                                 if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=1;} /* is inside a triangle */
2219
2220                                                 /*  If collision wasn't found but the face is a quad
2221                                                 *       do another check for the second half */
2222                                                 if ((!isInside) && mface[i].v4)
2223                                                 {
2224
2225                                                         /* change d2 to test the other half     */
2226                                                         sub_v2_v2v2(d2,  tface[i].uv[3], tface[i].uv[0]);       // uv3 - uv0
2227
2228                                                         /* test again   */
2229                                                         dot00 = d1[0]*d1[0] + d1[1]*d1[1];
2230                                                         dot01 = d1[0]*d2[0] + d1[1]*d2[1];
2231                                                         dot02 = d1[0]*d3[0] + d1[1]*d3[1];
2232                                                         dot11 = d2[0]*d2[0] + d2[1]*d2[1];
2233                                                         dot12 = d2[0]*d3[0] + d2[1]*d3[1];
2234
2235                                                         invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
2236                                                         u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2237                                                         v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2238
2239                                                         if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=2;} /* is inside the second half of the quad */
2240
2241                                                 }
2242
2243                                                 /*
2244                                                 *       If point was inside the face
2245                                                 */
2246                                                 if (isInside != 0) {
2247
2248                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2249                                                         int j;
2250
2251                                                         /* Get triagnle uvs     */
2252                                                         if (isInside==1) {
2253                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2254                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2255                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2256                                                         }
2257                                                         else {
2258                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2259                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2260                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2261                                                         }
2262
2263                                                         /* Add b-weights per anti-aliasing sample       */
2264                                                         for (j=0; j<aa_samples; j++) {
2265                                                                 uv[0] = point[0][0] + jitter5sample[j*2] / w;
2266                                                                 uv[1] = point[0][1] + jitter5sample[j*2+1] / h;
2267
2268                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v);
2269                                                         }
2270
2271                                                         /* Set surface point face values        */
2272                                                         tPoint->face_index = i;                                                 /* face index */
2273                                                         tPoint->quad = (isInside == 2) ? 1 : 0;         /* quad or tri part*/
2274
2275                                                         /* save vertex indexes  */
2276                                                         tPoint->v1 = (isInside == 2) ? mface[i].v1 : mface[i].v1;
2277                                                         tPoint->v2 = (isInside == 2) ? mface[i].v3 : mface[i].v2;
2278                                                         tPoint->v3 = (isInside == 2) ? mface[i].v4 : mface[i].v3;
2279
2280                                                         sample = 5;     /* make sure we exit sample loop as well */
2281                                                         break;
2282                                                 }
2283                                         }
2284                                 } /* sample loop */
2285                         }
2286                 }
2287
2288                 /*
2289                 *       Now loop through every pixel that was left without index
2290                 *       and find if they have neighbouring pixels that have an index.
2291                 *       If so use that polygon as pixel surface.
2292                 *       (To avoid seams on uv island edges)
2293                 */
2294                 #pragma omp parallel for schedule(static)
2295                 for (ty = 0; ty < h; ty++)
2296                 {
2297                         int tx;
2298                         for (tx = 0; tx < w; tx++)
2299                         {
2300                                 int index = tx+w*ty;
2301                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2302
2303                                 /* If point isnt't on canvas mesh       */
2304                                 if (tPoint->face_index == -1) {
2305                                         int u_min, u_max, v_min, v_max;
2306                                         int u,v, ind;
2307                                         float point[2];
2308
2309                                         /* get loop area        */
2310                                         u_min = (tx > 0) ? -1 : 0;
2311                                         u_max = (tx < (w-1)) ? 1 : 0;
2312                                         v_min = (ty > 0) ? -1 : 0;
2313                                         v_max = (ty < (h-1)) ? 1 : 0;
2314
2315                                         point[0] = ((float)tx + 0.5f) / w;
2316                                         point[1] = ((float)ty + 0.5f) / h;
2317
2318                                         /* search through defined area for neighbour    */
2319                                         for (u=u_min; u<=u_max; u++)
2320                                                 for (v=v_min; v<=v_max; v++) {
2321                                                         /* if not this pixel itself     */
2322                                                         if (u!=0 || v!=0) {
2323                                                                 ind = (tx+u)+w*(ty+v);
2324
2325                                                                 /* if neighbour has index       */
2326                                                                 if (tempPoints[ind].face_index != -1) {
2327
2328                                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2329                                                                         int i = tempPoints[ind].face_index, j;
2330
2331                                                                         /* Now calculate pixel data for this pixel as it was on polygon surface */
2332                                                                         if (!tempPoints[ind].quad) {
2333                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2334                                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2335                                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2336                                                                         }
2337                                                                         else {
2338                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2339                                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2340                                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2341                                                                         }
2342
2343                                                                         /* Add b-weights per anti-aliasing sample       */
2344                                                                         for (j=0; j<aa_samples; j++) {
2345
2346                                                                                 uv[0] = point[0] + jitter5sample[j*2] / w;
2347                                                                                 uv[1] = point[1] + jitter5sample[j*2+1] / h;
2348                                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v);
2349                                                                         }
2350
2351                                                                         /* Set values   */
2352                                                                         tPoint->neighbour_pixel = ind;                          // face index
2353                                                                         tPoint->quad = tempPoints[ind].quad;            // quad or tri
2354
2355                                                                         /* save vertex indexes  */
2356                                                                         tPoint->v1 = (tPoint->quad) ? mface[i].v1 : mface[i].v1;
2357                                                                         tPoint->v2 = (tPoint->quad) ? mface[i].v3 : mface[i].v2;
2358                                                                         tPoint->v3 = (tPoint->quad) ? mface[i].v4 : mface[i].v3;
2359
2360                                                                         u = u_max + 1;  /* make sure we exit outer loop as well */
2361                                                                         break;
2362                                                                 }
2363                                                 }
2364                                         }
2365                                 }
2366                         }
2367                 }
2368
2369                 /*
2370                 *       When base loop is over convert found neighbour indexes to real ones
2371                 *       Also count the final number of active surface points
2372                 */
2373                 for (ty = 0; ty < h; ty++)
2374                 {
2375                         int tx;
2376                         for (tx = 0; tx < w; tx++)
2377                         {
2378                                 int index = tx+w*ty;
2379                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2380
2381                                 if (tPoint->face_index == -1 && tPoint->neighbour_pixel != -1) tPoint->face_index = tempPoints[tPoint->neighbour_pixel].face_index;
2382                                 if (tPoint->face_index != -1) active_points++;
2383                         }
2384                 }
2385
2386                 /*      If any effect enabled, create surface effect / wet layer
2387                 *       neighbour lists. Processes possibly moving data. */
2388                 if (surface_usesAdjData(surface)) {
2389
2390                         int i, cursor=0;
2391
2392                         /* Create a temporary array of final indexes (before unassigned
2393                         *  pixels have been dropped) */
2394                         for (i=0; i<w*h; i++) {
2395                                 if (tempPoints[i].face_index != -1) {
2396                                         final_index[i] = cursor;
2397                                         cursor++;
2398                                 }
2399                         }
2400                         /* allocate memory */
2401                         sData->total_points = w*h;
2402                         dynamicPaint_initAdjacencyData(surface, 0);
2403
2404                         if (sData->adj_data) {
2405                                 PaintAdjData *ed = sData->adj_data;
2406                                 unsigned int n_pos = 0;
2407                                 //#pragma omp parallel for schedule(static)
2408                                 for (ty = 0; ty < h; ty++)
2409                                 {
2410                                         int tx;
2411                                         for (tx = 0; tx < w; tx++)
2412                                         {
2413                                                 int i, index = tx+w*ty;
2414
2415                                                 if (tempPoints[index].face_index != -1) {
2416                                                         ed->n_index[final_index[index]] = n_pos;
2417                                                         ed->n_num[final_index[index]] = 0;
2418
2419                                                         for (i=0; i<8; i++) {
2420
2421                                                                 /* Try to find a neighbouring pixel in defined direction
2422                                                                 *  If not found, -1 is returned */
2423                                                                 int n_target = dynamicPaint_findNeighbourPixel(tempPoints, dm, uvname, w, h, tx, ty, i);
2424
2425                                                                 if (n_target != -1) {
2426                                                                         ed->n_target[n_pos] = final_index[n_target];
2427                                                                         ed->n_num[final_index[index]]++;
2428                                                                         n_pos++;
2429                                                                 }
2430                                                         }
2431                                                 }
2432                                         }
2433                                 }
2434                         }
2435                 }
2436
2437                 /* Create final surface data without inactive points */
2438                 {
2439                         ImgSeqFormatData *f_data = MEM_callocN(sizeof(struct ImgSeqFormatData), "ImgSeqFormatData");
2440                         if (f_data) {
2441                                 f_data->uv_p = MEM_callocN(active_points*sizeof(struct PaintUVPoint), "PaintUVPoint");
2442                                 f_data->barycentricWeights = MEM_callocN(active_points*aa_samples*sizeof(struct Vec3f), "PaintUVPoint");
2443
2444                                 if (!f_data->uv_p || !f_data->barycentricWeights) error=1;
2445                         }
2446                         else error=1;
2447
2448                         sData->total_points = active_points;
2449
2450                         /* in case of allocation error, free everything */
2451                         if (error) {
2452                                 if (f_data) {
2453                                         if (f_data->uv_p) MEM_freeN(f_data->uv_p);
2454                                         if (f_data->barycentricWeights) MEM_freeN(f_data->barycentricWeights);
2455                                         MEM_freeN(f_data);
2456                                 }
2457                         }
2458                         else {
2459                                 int index, cursor = 0;
2460                                 sData->total_points = active_points;
2461                                 sData->format_data = f_data;
2462
2463                                 for(index = 0; index < (w*h); index++) {
2464                                         if (tempPoints[index].face_index != -1) {
2465                                                 memcpy(&f_data->uv_p[cursor], &tempPoints[index], sizeof(PaintUVPoint));
2466                                                 memcpy(&f_data->barycentricWeights[cursor*aa_samples], &tempWeights[index*aa_samples], sizeof(Vec3f)*aa_samples);
2467                                                 cursor++;
2468                                         }
2469                                 }
2470                         }
2471                 }
2472         }
2473         if (error==1) setError(canvas, "Not enough free memory.");
2474
2475         if (faceBB) MEM_freeN(faceBB);
2476         if (tempPoints) MEM_freeN(tempPoints);
2477         if (tempWeights) MEM_freeN(tempWeights);
2478         if (final_index) MEM_freeN(final_index);
2479
2480         /* Init surface type data */
2481         if (!error) {
2482                 dynamicPaint_allocateSurfaceType(surface);
2483
2484 #if 0
2485                 /*  -----------------------------------------------------------------
2486                 *       For debug, output pixel statuses to the color map
2487                 *       -----------------------------------------------------------------*/
2488                 #pragma omp parallel for schedule(static)
2489                 for (index = 0; index < sData->total_points; index++)
2490                 {
2491                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
2492                         PaintUVPoint *uvPoint = &((PaintUVPoint*)f_data->uv_p)[index];
2493                         PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index];
2494                         pPoint->alpha=1.0f;
2495
2496                         /* Every pixel that is assigned as "edge pixel" gets blue color */
2497                         if (uvPoint->neighbour_pixel != -1) pPoint->color[2] = 1.0f;
2498                         /* and every pixel that finally got an polygon gets red color   */
2499                         if (uvPoint->face_index != -1) pPoint->color[0] = 1.0f;
2500                         /* green color shows pixel face index hash      */
2501                         if (uvPoint->face_index != -1) pPoint->color[1] = (float)(uvPoint->face_index % 255)/256.0f;
2502                 }
2503
2504 #endif
2505                 dynamicPaint_setInitialColor(surface);
2506         }
2507
2508         return (error == 0);
2509 }
2510
2511 /*
2512 *       Outputs an image file from uv surface data.
2513 */
2514 void dynamicPaint_outputSurfaceImage(DynamicPaintSurface *surface, char* filename, short output_layer)
2515 {
2516         int index;
2517         ImBuf* ibuf = NULL;
2518         PaintSurfaceData *sData = surface->data;
2519         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
2520         /* OpenEXR or PNG       */
2521         int format = (surface->image_fileformat & MOD_DPAINT_IMGFORMAT_OPENEXR) ? R_OPENEXR : R_PNG;
2522         char output_file[FILE_MAX];
2523
2524         if (!sData || !sData->type_data) {setError(surface->canvas, "Image save failed: Invalid surface.");return;}
2525         /* if selected format is openexr, but current build doesnt support one */
2526         #ifndef WITH_OPENEXR
2527         if (format == R_OPENEXR) format = R_PNG;
2528         #endif
2529         BLI_strncpy(output_file, filename, sizeof(output_file));
2530         BKE_add_image_extension(output_file, format);
2531
2532         /* Validate output file path    */
2533         BLI_path_abs(output_file, G.main->name);
2534         BLI_make_existing_file(output_file);
2535
2536         /* Init image buffer    */
2537         ibuf = IMB_allocImBuf(surface->image_resolution, surface->image_resolution, 32, IB_rectfloat);
2538         if (ibuf == NULL) {setError(surface->canvas, "Image save failed: Not enough free memory.");return;}
2539
2540         #pragma omp parallel for schedule(static)
2541         for (index = 0; index < sData->total_points; index++)
2542         {
2543                 int pos=f_data->uv_p[index].pixel_index*4;      /* image buffer position */
2544
2545                 /* Set values of preferred type */
2546                 if (output_layer == 1) {
2547                         /* wetmap */
2548                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2549                                 PaintPoint *point = &((PaintPoint*)sData->type_data)[index];
2550                                 float value = (point->wetness > 1.0f) ? 1.0f : point->wetness;
2551
2552                                 ibuf->rect_float[pos]=value;
2553                                 ibuf->rect_float[pos+1]=value;
2554                                 ibuf->rect_float[pos+2]=value;
2555                                 ibuf->rect_float[pos+3]=1.0f;
2556                         }
2557                 }
2558                 else if (output_layer == 0) {
2559                         /* Paintmap */
2560                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2561                                 PaintPoint *point = &((PaintPoint*)sData->type_data)[index];
2562
2563                                 ibuf->rect_float[pos]   = point->color[0];
2564                                 ibuf->rect_float[pos+1] = point->color[1];
2565                                 ibuf->rect_float[pos+2] = point->color[2];
2566                                 /* mix wet layer */
2567                                 if (point->e_alpha) mixColors(&ibuf->rect_float[pos], point->alpha, point->e_color, point->e_alpha);
2568
2569                                 /* use highest alpha    */
2570                                 ibuf->rect_float[pos+3] = (point->e_alpha > point->alpha) ? point->e_alpha : point->alpha;
2571
2572                                 /* Multiply color by alpha if enabled   */
2573                                 if (surface->flags & MOD_DPAINT_MULALPHA) {
2574                                         ibuf->rect_float[pos]   *= ibuf->rect_float[pos+3];
2575                                         ibuf->rect_float[pos+1] *= ibuf->rect_float[pos+3];
2576                                         ibuf->rect_float[pos+2] *= ibuf->rect_float[pos+3];
2577                                 }
2578                         }
2579                         /* displace */
2580                         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
2581                                 float depth = ((float*)sData->type_data)[index];
2582                                 if (surface->depth_clamp)
2583                                         depth /= surface->depth_clamp;
2584
2585                                 if (surface->disp_type == MOD_DPAINT_DISP_DISPLACE) {
2586                                         depth = (0.5f - depth/2.0f);
2587                                 }
2588
2589                                 CLAMP(depth, 0.0f, 1.0f);
2590
2591                                 ibuf->rect_float[pos]=depth;
2592                                 ibuf->rect_float[pos+1]=depth;
2593                                 ibuf->rect_float[pos+2]=depth;
2594                                 ibuf->rect_float[pos+3]=1.0f;
2595                         }
2596                         /* waves */
2597                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
2598                                 PaintWavePoint *wPoint = &((PaintWavePoint*)sData->type_data)[index];
2599                                 float depth = wPoint->height;
2600                                 if (surface->depth_clamp)
2601                                                 depth /= surface->depth_clamp;
2602                                 depth = (0.5f + depth/2.0f);
2603                                 CLAMP(depth, 0.0f, 1.0f);
2604
2605                                 ibuf->rect_float[pos]=depth;
2606                                 ibuf->rect_float[pos+1]=depth;
2607                                 ibuf->rect_float[pos+2]=depth;
2608                                 ibuf->rect_float[pos+3]=1.0f;
2609                         }
2610                 }
2611         }
2612
2613         /* Set output format, png in case exr isnt supported */
2614         ibuf->ftype= PNG|95;
2615 #ifdef WITH_OPENEXR
2616         if (format == R_OPENEXR) {      /* OpenEXR 32-bit float */
2617                 ibuf->ftype = OPENEXR | OPENEXR_COMPRESS;
2618         }
2619 #endif
2620
2621         /* Save image */
2622         IMB_saveiff(ibuf, output_file, IB_rectfloat);
2623         IMB_freeImBuf(ibuf);
2624 }
2625
2626
2627 /***************************** Material / Texture Sampling ******************************/
2628
2629 /* stores a copy of required materials to allow doing adjustments
2630 *  without interfering the render/preview */
2631 typedef struct BrushMaterials {
2632         Material *mat;
2633         Material **ob_mats;
2634         int tot;
2635 } BrushMaterials;
2636
2637 /* Initialize materials for brush object:
2638 *  Calculates inverse matrices for linked objects, updates
2639 *  volume caches etc. */
2640 static void dynamicPaint_updateBrushMaterials(Object *brushOb, Material *ui_mat, Scene *scene, BrushMaterials *bMats)
2641 {
2642         /* Calculate inverse transformation matrix
2643         *  for this object */
2644         invert_m4_m4(brushOb->imat, brushOb->obmat);
2645         copy_m4_m4(brushOb->imat_ren, brushOb->imat);
2646
2647         /* Now process every material linked to this brush object */
2648         if ((ui_mat == NULL) && brushOb->mat && brushOb->totcol) {
2649                 int i, tot=(*give_totcolp(brushOb));
2650
2651                 /* allocate material pointer array */
2652                 if (tot) {
2653                         bMats->ob_mats = MEM_callocN(sizeof(Material*)*(tot), "BrushMaterials");
2654                         for (i=0; i<tot; i++) {
2655                                 bMats->ob_mats[i] = RE_init_sample_material(give_current_material(brushOb,(i+1)), scene);
2656                         }
2657                 }
2658                 bMats->tot = tot;
2659         }
2660         else {
2661                 bMats->mat = RE_init_sample_material(ui_mat, scene);
2662         }
2663 }
2664
2665 /* free all data allocated by dynamicPaint_updateBrushMaterials() */
2666 static void dynamicPaint_freeBrushMaterials(BrushMaterials *bMats)
2667 {
2668         /* Now process every material linked to this brush object */
2669         if (bMats->ob_mats) {
2670                 int i;
2671                 for (i=0; i<bMats->tot; i++) {
2672                         RE_free_sample_material(bMats->ob_mats[i]);
2673                 }
2674                 MEM_freeN(bMats->ob_mats);
2675         }
2676         else if (bMats->mat) {
2677                 RE_free_sample_material(bMats->mat);
2678         }
2679 }
2680
2681 /*
2682 *       Get material diffuse color and alpha (including linked textures) in given coordinates
2683 */
2684 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)
2685 {
2686         Material *mat = bMats->mat;
2687         MFace *mface = orcoDm->getFaceArray(orcoDm);
2688
2689         /* If no material defined, use the one assigned to the mesh face */
2690         if (mat == NULL) {
2691                 if (bMats->ob_mats) {
2692                         int mat_nr = mface[faceIndex].mat_nr;
2693                         if (mat_nr >= (*give_totcolp(brushOb))) return;
2694                         mat = bMats->ob_mats[mat_nr];
2695                         if (mat == NULL) return;        /* No material assigned */
2696                 }
2697                 else return;
2698         }
2699
2700         RE_sample_material_color(mat, color, alpha, volume_co, surface_co, faceIndex, isQuad, orcoDm, brushOb);
2701 }
2702
2703
2704 /***************************** Ray / Nearest Point Utils ******************************/
2705
2706
2707 /*  A modified callback to bvh tree raycast. The tree must bust have been built using bvhtree_from_mesh_faces.
2708 *   userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree.
2709 *
2710 *