svn merge ^/trunk/blender -r43009:43033
[blender.git] / 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_constraint_types.h"
28 #include "DNA_dynamicpaint_types.h"
29 #include "DNA_group_types.h" /*GroupObject*/
30 #include "DNA_material_types.h"
31 #include "DNA_mesh_types.h"
32 #include "DNA_meshdata_types.h"
33 #include "DNA_modifier_types.h"
34 #include "DNA_object_types.h"
35 #include "DNA_scene_types.h"
36 #include "DNA_space_types.h"
37 #include "DNA_texture_types.h"
38
39 #include "BKE_animsys.h"
40 #include "BKE_bvhutils.h"       /* bvh tree     */
41 #include "BKE_blender.h"
42 #include "BKE_cdderivedmesh.h"
43 #include "BKE_constraint.h"
44 #include "BKE_context.h"
45 #include "BKE_customdata.h"
46 #include "BKE_colortools.h"
47 #include "BKE_deform.h"
48 #include "BKE_depsgraph.h"
49 #include "BKE_DerivedMesh.h"
50 #include "BKE_dynamicpaint.h"
51 #include "BKE_effect.h"
52 #include "BKE_global.h"
53 #include "BKE_image.h"
54 #include "BKE_main.h"
55 #include "BKE_material.h"
56 #include "BKE_modifier.h"
57 #include "BKE_object.h"
58 #include "BKE_particle.h"
59 #include "BKE_pointcache.h"
60 #include "BKE_scene.h"
61 #include "BKE_texture.h"
62
63 #include "RNA_access.h"
64 #include "RNA_define.h"
65 #include "RNA_enum_types.h"
66
67 /* for image output     */
68 #include "IMB_imbuf_types.h"
69 #include "IMB_imbuf.h"
70
71 /* to read material/texture color       */
72 #include "RE_render_ext.h"
73 #include "RE_shader_ext.h"
74
75 #ifdef _OPENMP
76 #include <omp.h>
77 #endif
78
79 /* precalculated gaussian factors for 5x super sampling */
80 static float gaussianFactors[5] = {     0.996849f,
81                                                                 0.596145f,
82                                                                 0.596145f,
83                                                                 0.596145f,
84                                                                 0.524141f};
85 static float gaussianTotal = 3.309425f;
86
87 /* UV Image neighbouring pixel table x and y list */
88 static int neighX[8] = {1,1,0,-1,-1,-1, 0, 1};
89 static int neighY[8] = {0,1,1, 1, 0,-1,-1,-1};
90
91 /* subframe_updateObject() flags */
92 #define UPDATE_PARENTS (1<<0)
93 #define UPDATE_MESH (1<<1)
94 #define UPDATE_EVERYTHING (UPDATE_PARENTS|UPDATE_MESH)
95 /* surface_getBrushFlags() return vals */
96 #define BRUSH_USES_VELOCITY (1<<0)
97 /* brush mesh raycast status */
98 #define HIT_VOLUME 1
99 #define HIT_PROXIMITY 2
100 /* paint effect default movement per frame in global units */
101 #define EFF_MOVEMENT_PER_FRAME 0.05f
102 /* initial wave time factor */
103 #define WAVE_TIME_FAC (1.0f/24.f)
104 #define WAVE_INIT_SIZE 5.0f
105 /* drying limits */
106 #define MIN_WETNESS 0.001f
107 /* dissolve macro */
108 #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)
109
110 /***************************** Internal Structs ***************************/
111
112 typedef struct Bounds2D {
113         float min[2], max[2];
114 } Bounds2D;
115
116 typedef struct Bounds3D {
117         int valid;
118         float min[3], max[3];
119 } Bounds3D;
120
121 typedef struct VolumeGrid {
122         int dim[3];
123         Bounds3D grid_bounds; /* whole grid bounds */
124
125         Bounds3D *bounds;       /* (x*y*z) precalculated grid cell bounds */
126         int *s_pos; /* (x*y*z) t_index begin id */
127         int *s_num; /* (x*y*z) number of t_index points */
128         int *t_index; /* actual surface point index,
129                                                    access: (s_pos+s_num) */
130 } VolumeGrid;
131
132 typedef struct Vec3f {
133         float v[3];
134 } Vec3f;
135
136 typedef struct BakeNeighPoint {
137         float dir[3];   /* vector pointing towards this neighbour */
138         float dist;             /* distance to */
139 } BakeNeighPoint;
140
141 /* Surface data used while processing a frame   */
142 typedef struct PaintBakeNormal {
143         float invNorm[3];  /* current pixel world-space inverted normal */
144         float normal_scale; /* normal directional scale for displace mapping */
145 } PaintBakeNormal;
146
147 /* Temp surface data used to process a frame */
148 typedef struct PaintBakeData {
149         /* point space data */
150         PaintBakeNormal *bNormal;
151         int *s_pos;     /* index to start reading point sample realCoord */
152         int *s_num;     /* num of realCoord samples */
153         Vec3f *realCoord;  /* current pixel center world-space coordinates for each sample
154                                            *  ordered as (s_pos+s_num)*/
155         Bounds3D mesh_bounds;
156
157         /* adjacency info */
158         BakeNeighPoint *bNeighs; /* current global neighbour distances and directions, if required */
159         double average_dist;
160         /* space partitioning */
161         VolumeGrid *grid;               /* space partitioning grid to optimize brush checks */
162
163         /* velocity and movement */
164         Vec3f *velocity;                /* speed vector in global space movement per frame, if required */
165         Vec3f *prev_velocity;
166         float *brush_velocity;  /* special temp data for post-p velocity based brushes like smudge
167                                                         *  3 float dir vec + 1 float str */
168         MVert *prev_verts;              /* copy of previous frame vertices. used to observe surface movement */
169         float prev_obmat[4][4]; /* previous frame object matrix */
170         int clear;                              /* flag to check if surface was cleared/reset -> have to redo velocity etc. */
171
172 } PaintBakeData;
173
174 /* UV Image sequence format point       */
175 typedef struct PaintUVPoint {
176         /* Pixel / mesh data */
177         unsigned int face_index, pixel_index;   /* face index on domain derived mesh */
178         unsigned int v1, v2, v3;                                /* vertex indexes */
179
180         unsigned int neighbour_pixel;   /* If this pixel isn't uv mapped to any face,
181                                                                            but it's neighbouring pixel is */
182         short quad;
183 } PaintUVPoint;
184
185 typedef struct ImgSeqFormatData {
186         PaintUVPoint *uv_p;
187         Vec3f *barycentricWeights;              /* b-weights for all pixel samples */
188 } ImgSeqFormatData;
189
190 typedef struct EffVelPoint {
191         float previous_pos[3];
192         float previous_vel[3];
193 } EffVelPoint;
194
195
196 /* adjacency data flags */
197 #define ADJ_ON_MESH_EDGE (1<<0)
198
199 typedef struct PaintAdjData {
200         int *n_target;          /* array of neighbouring point indexes,
201                                                                for single sample use (n_index+neigh_num) */
202         int *n_index;           /* index to start reading n_target for each point */
203         int *n_num;             /* num of neighs for each point */
204         int *flags;             /* vertex adjacency flags */
205         int total_targets; /* size of n_target */
206 } PaintAdjData;
207
208 /***************************** General Utils ******************************/
209
210 /* Set canvas error string to display at the bake report */
211 static int setError(DynamicPaintCanvasSettings *canvas, const char *string)
212 {
213         /* Add error to canvas ui info label */
214         BLI_strncpy(canvas->error, string, sizeof(canvas->error));
215         return 0;
216 }
217
218 /* Get number of surface points for cached types */
219 static int dynamicPaint_surfaceNumOfPoints(DynamicPaintSurface *surface)
220 {
221         if (surface->format == MOD_DPAINT_SURFACE_F_PTEX) {
222                 return 0; /* not supported atm */
223         }
224         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
225                 if (!surface->canvas->dm) return 0; /* invalid derived mesh */
226                 return surface->canvas->dm->getNumVerts(surface->canvas->dm);
227         }
228         else
229                 return 0;
230 }
231
232 /* checks whether surface's format/type has realtime preview */
233 int dynamicPaint_surfaceHasColorPreview(DynamicPaintSurface *surface)
234 {
235         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 0;
236         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
237                 if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE ||
238                         surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 0;
239                 else return 1;
240         }
241         else return 1;
242 }
243
244 /* get currently active surface (in user interface) */
245 struct DynamicPaintSurface *get_activeSurface(DynamicPaintCanvasSettings *canvas)
246 {
247         DynamicPaintSurface *surface = canvas->surfaces.first;
248         int i;
249
250         for(i=0; surface; surface=surface->next) {
251                 if(i == canvas->active_sur)
252                         return surface;
253                 i++;
254         }
255         return NULL;
256 }
257
258 /* set preview to first previewable surface */
259 void dynamicPaint_resetPreview(DynamicPaintCanvasSettings *canvas)
260 {
261         DynamicPaintSurface *surface = canvas->surfaces.first;
262         int done=0;
263
264         for(; surface; surface=surface->next) {
265                 if (!done && dynamicPaint_surfaceHasColorPreview(surface)) {
266                         surface->flags |= MOD_DPAINT_PREVIEW;
267                         done=1;
268                 }
269                 else
270                         surface->flags &= ~MOD_DPAINT_PREVIEW;
271         }
272 }
273
274 /* set preview to defined surface */
275 static void dynamicPaint_setPreview(DynamicPaintSurface *t_surface)
276 {
277         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
278         for(; surface; surface=surface->next) {
279                 if (surface == t_surface)
280                         surface->flags |= MOD_DPAINT_PREVIEW;
281                 else
282                         surface->flags &= ~MOD_DPAINT_PREVIEW;
283         }
284 }
285
286 int dynamicPaint_outputLayerExists(struct DynamicPaintSurface *surface, Object *ob, int output)
287 {
288         char *name;
289
290         if (output == 0)
291                 name = surface->output_name;
292         else if (output == 1)
293                 name = surface->output_name2;
294         else
295                 return 0;
296
297         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
298                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
299                         Mesh *me = ob->data;
300                         return (CustomData_get_named_layer_index(&me->fdata, CD_MCOL, name) != -1);
301                 }
302                 else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT)
303                         return (defgroup_name_index(ob, surface->output_name) != -1);
304         }
305
306         return 0;
307 }
308
309 static int surface_duplicateOutputExists(void *arg, const char *name)
310 {
311         DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg;
312         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
313
314         for(; surface; surface=surface->next) {
315                 if (surface!=t_surface && surface->type==t_surface->type &&
316                         surface->format==t_surface->format) {
317                         if (surface->output_name[0]!='\0' && !strcmp(name, surface->output_name)) return 1;
318                         if (surface->output_name2[0]!='\0' && !strcmp(name, surface->output_name2)) return 1;
319                 }
320         }
321         return 0;
322 }
323
324 static void surface_setUniqueOutputName(DynamicPaintSurface *surface, char *basename, int output)
325 {
326         char name[64];
327         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
328         if (!output)
329                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name, sizeof(surface->output_name));
330         if (output)
331                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name2, sizeof(surface->output_name2));
332 }
333
334
335 static int surface_duplicateNameExists(void *arg, const char *name)
336 {
337         DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg;
338         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
339
340         for(; surface; surface=surface->next) {
341                 if (surface!=t_surface && !strcmp(name, surface->name)) return 1;
342         }
343         return 0;
344 }
345
346 void dynamicPaintSurface_setUniqueName(DynamicPaintSurface *surface, const char *basename)
347 {
348         char name[64];
349         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
350         BLI_uniquename_cb(surface_duplicateNameExists, surface, name, '.', surface->name, sizeof(surface->name));
351 }
352
353
354 /* change surface data to defaults on new type */
355 void dynamicPaintSurface_updateType(struct DynamicPaintSurface *surface)
356 {
357         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
358                 surface->output_name[0]='\0';
359                 surface->output_name2[0]='\0';
360                 surface->flags |= MOD_DPAINT_ANTIALIAS;
361                 surface->depth_clamp = 1.0f;
362         }
363         else {
364                 sprintf(surface->output_name, "dp_");
365                 strcpy(surface->output_name2,surface->output_name);
366                 surface->flags &= ~MOD_DPAINT_ANTIALIAS;
367                 surface->depth_clamp = 0.0f;
368         }
369
370         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
371                 strcat(surface->output_name,"paintmap");
372                 strcat(surface->output_name2,"wetmap");
373                 surface_setUniqueOutputName(surface, surface->output_name2, 1);
374         }
375         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
376                 strcat(surface->output_name,"displace");
377         }
378         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
379                 strcat(surface->output_name,"weight");
380         }
381         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
382                 strcat(surface->output_name,"wave");
383         }
384
385         surface_setUniqueOutputName(surface, surface->output_name, 0);
386
387         /* update preview */
388         if (dynamicPaint_surfaceHasColorPreview(surface))
389                 dynamicPaint_setPreview(surface);
390         else
391                 dynamicPaint_resetPreview(surface->canvas);
392 }
393
394 static int surface_totalSamples(DynamicPaintSurface *surface)
395 {
396         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ &&
397                 surface->flags & MOD_DPAINT_ANTIALIAS)
398                 return (surface->data->total_points*5);
399         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
400                 surface->flags & MOD_DPAINT_ANTIALIAS && surface->data->adj_data)
401                 return (surface->data->total_points+surface->data->adj_data->total_targets);
402
403         return surface->data->total_points;
404 }
405
406 static void blendColors(float t_color[3], float t_alpha, float s_color[3], float s_alpha, float result[4])
407 {
408         int i;
409         float i_alpha = 1.0f - s_alpha;
410         float f_alpha = t_alpha*i_alpha + s_alpha;
411
412         /* blend colors */
413         if (f_alpha) {
414                 for (i=0; i<3; i++) {
415                         result[i] = (t_color[i]*t_alpha*i_alpha + s_color[i]*s_alpha)/f_alpha;
416                 }
417         }
418         else {
419                 copy_v3_v3(result, t_color);
420         }
421         /* return final alpha */
422         result[3] = f_alpha;
423 }
424
425 /* assumes source alpha > 0.0f or results NaN colors */
426 static void mixColors(float *t_color, float t_alpha, float *s_color, float s_alpha)
427 {
428         float factor = (s_alpha<t_alpha) ? 1.0f : t_alpha/s_alpha;
429
430         /* set initial color depending on existing alpha */
431         interp_v3_v3v3(t_color, s_color, t_color, factor);
432         /* mix final color */
433         interp_v3_v3v3(t_color, t_color, s_color, s_alpha);
434 }
435
436 /* set "ignore cache" flag for all caches on this object */
437 static void object_cacheIgnoreClear(Object *ob, int state)
438 {
439         ListBase pidlist;
440         PTCacheID *pid;
441         BKE_ptcache_ids_from_object(&pidlist, ob, NULL, 0);
442
443         for(pid=pidlist.first; pid; pid=pid->next) {
444                 if(pid->cache) {
445                         if (state)
446                                 pid->cache->flag |= PTCACHE_IGNORE_CLEAR;
447                         else
448                                 pid->cache->flag &= ~PTCACHE_IGNORE_CLEAR;
449                 }
450         }
451
452         BLI_freelistN(&pidlist);
453 }
454
455 static void subframe_updateObject(Scene *scene, Object *ob, int flags, float frame)
456 {
457         DynamicPaintModifierData *pmd = (DynamicPaintModifierData *)modifiers_findByType(ob, eModifierType_DynamicPaint);
458         bConstraint *con;
459
460         /* if other is dynamic paint canvas, dont update */
461         if (pmd && pmd->canvas)
462                 return;
463
464         /* if object has parents, update them too */
465         if (flags & UPDATE_PARENTS) {
466                 if (ob->parent) subframe_updateObject(scene, ob->parent, 0, frame);
467                 if (ob->track) subframe_updateObject(scene, ob->track, 0, frame);
468
469                 /* also update constraint targets */
470                 for (con = ob->constraints.first; con; con=con->next) {
471                         bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
472                         ListBase targets = {NULL, NULL};
473
474                         if (cti && cti->get_constraint_targets) {
475                                 bConstraintTarget *ct;
476                                 cti->get_constraint_targets(con, &targets);
477                                 for (ct= targets.first; ct; ct= ct->next) {
478                                         if (ct->tar)
479                                                 subframe_updateObject(scene, ct->tar, 0, frame);
480                                 }
481                                 /* free temp targets */
482                                 if (cti->flush_constraint_targets)
483                                         cti->flush_constraint_targets(con, &targets, 0);
484                         }
485                 }
486         }
487         /* for curve following objects, parented curve has to be updated too */
488         if(ob->type==OB_CURVE) {
489                 Curve *cu= ob->data;
490                 BKE_animsys_evaluate_animdata(scene, &cu->id, cu->adt, frame, ADT_RECALC_ANIM);
491         }
492
493         ob->recalc |= OB_RECALC_ALL;
494         BKE_animsys_evaluate_animdata(scene, &ob->id, ob->adt, frame, ADT_RECALC_ANIM);
495         if (flags & UPDATE_MESH) {
496                 /* ignore cache clear during subframe updates
497                 *  to not mess up cache validity */
498                 object_cacheIgnoreClear(ob, 1);
499                 object_handle_update(scene, ob);
500                 object_cacheIgnoreClear(ob, 0);
501         }
502         else
503                 where_is_object_time(scene, ob, frame);
504 }
505
506 static void scene_setSubframe(Scene *scene, float subframe)
507 {
508         /* dynamic paint subframes must be done on previous frame */
509         scene->r.cfra -= 1;
510         scene->r.subframe = subframe;
511 }
512
513 static int surface_getBrushFlags(DynamicPaintSurface *surface, Scene *scene)
514 {
515         Base *base = NULL;
516         GroupObject *go = NULL; 
517         Object *brushObj = NULL;
518         ModifierData *md = NULL;
519
520         int flags = 0;
521
522         if(surface->brush_group)
523                 go = surface->brush_group->gobject.first;
524         else
525                 base = scene->base.first;
526
527         while (base || go)
528         {
529                 brushObj = NULL;
530
531                 /* select object */
532                 if(surface->brush_group) {                                              
533                         if(go->ob)      brushObj = go->ob;                                      
534                 }                                       
535                 else                                            
536                         brushObj = base->object;
537
538                 if(!brushObj)                                   
539                 {
540                         if(surface->brush_group) go = go->next;
541                         else base= base->next;                                  
542                         continue;                       
543                 }
544
545                 if(surface->brush_group)
546                         go = go->next;
547                 else
548                         base= base->next;
549
550                 md = modifiers_findByType(brushObj, eModifierType_DynamicPaint);
551                 if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render))                                    
552                 {
553                         DynamicPaintModifierData *pmd2 = (DynamicPaintModifierData *)md;
554
555                         if (pmd2->brush)
556                         {
557                                 DynamicPaintBrushSettings *brush = pmd2->brush;
558
559                                 if (brush->flags & MOD_DPAINT_USES_VELOCITY)
560                                         flags |= BRUSH_USES_VELOCITY;
561                         }
562                 }
563         }
564
565         return flags;
566 }
567
568 static int brush_usesMaterial(DynamicPaintBrushSettings *brush, Scene *scene)
569 {
570         return ((brush->flags & MOD_DPAINT_USE_MATERIAL) && (!strcmp(scene->r.engine, "BLENDER_RENDER")));
571 }
572
573 /* check whether two bounds intersect */
574 static int boundsIntersect(Bounds3D *b1, Bounds3D *b2)
575 {
576         int i=2;
577         if (!b1->valid || !b2->valid) return 0;
578         for (; i>=0; i-=1)
579                 if (!(b1->min[i] <= b2->max[i] && b1->max[i] >= b2->min[i])) return 0;
580         return 1;
581 }
582
583 /* check whether two bounds intersect inside defined proximity */
584 static int boundsIntersectDist(Bounds3D *b1, Bounds3D *b2, float dist)
585 {
586         int i=2;
587         if (!b1->valid || !b2->valid) return 0;
588         for (; i>=0; i-=1)
589                 if (!(b1->min[i] <= (b2->max[i]+dist) && b1->max[i] >= (b2->min[i]-dist))) return 0;
590         return 1;
591 }
592
593 /* check whether bounds intersects a point with given radius */
594 static int boundIntersectPoint(Bounds3D *b, float point[3], float radius)
595 {
596         int i=2;
597         if (!b->valid) return 0;
598         for (; i>=0; i-=1)
599                 if (!(b->min[i] <= (point[i]+radius) && b->max[i] >= (point[i]-radius))) return 0;
600         return 1;
601 }
602
603 /* expand bounds by a new point */
604 static void boundInsert(Bounds3D *b, float point[3])
605 {
606         int i=2;
607         if (!b->valid) {
608                 copy_v3_v3(b->min, point);
609                 copy_v3_v3(b->max, point);
610                 b->valid = 1;
611         }
612         else {
613                 for (; i>=0; i-=1) {
614                         if (point[i] < b->min[i]) b->min[i]=point[i];
615                         if (point[i] > b->max[i]) b->max[i]=point[i];
616                 }
617         }
618 }
619
620 static void freeGrid(PaintSurfaceData *data)
621 {
622         PaintBakeData *bData = data->bData;
623         VolumeGrid *grid = bData->grid;
624
625         if (grid->bounds) MEM_freeN(grid->bounds);
626         if (grid->s_pos) MEM_freeN(grid->s_pos);
627         if (grid->s_num) MEM_freeN(grid->s_num);
628         if (grid->t_index) MEM_freeN(grid->t_index);
629
630         MEM_freeN(bData->grid);
631         bData->grid = NULL;
632 }
633
634 static void surfaceGenerateGrid(struct DynamicPaintSurface *surface)
635 {
636         PaintSurfaceData *sData = surface->data;
637         PaintBakeData *bData = sData->bData;
638         Bounds3D *grid_bounds;
639         VolumeGrid *grid;
640         int grid_cells, axis = 3;
641         int *temp_t_index = NULL;
642         int *temp_s_num = NULL;
643
644 #ifdef _OPENMP
645         int num_of_threads = omp_get_max_threads();
646 #else
647         int num_of_threads = 1;
648 #endif
649
650         if (bData->grid)
651                 freeGrid(sData);
652
653         /* allocate separate bounds for each thread */
654         grid_bounds = MEM_callocN(sizeof(Bounds3D)*num_of_threads, "Grid Bounds");
655         bData->grid = MEM_callocN(sizeof(VolumeGrid), "Surface Grid");
656         grid = bData->grid;
657
658         if (grid && grid_bounds) {
659                 int i, error = 0;
660                 float dim_factor, volume, dim[3];
661                 float td[3];
662                 float min_dim;
663
664                 /* calculate canvas dimensions */
665                 #pragma omp parallel for schedule(static)
666                 for (i=0; i<sData->total_points; i++) {
667                         #ifdef _OPENMP
668                         int id = omp_get_thread_num();
669                         boundInsert(&grid_bounds[id], (bData->realCoord[bData->s_pos[i]].v));
670                         #else
671                         boundInsert(&grid_bounds[0], (bData->realCoord[bData->s_pos[i]].v));
672                         #endif
673                 }
674
675                 /* get final dimensions */
676                 for (i=0; i<num_of_threads; i++) {
677                         boundInsert(&grid->grid_bounds, grid_bounds[i].min);
678                         boundInsert(&grid->grid_bounds, grid_bounds[i].max);
679                 }
680
681                 /* get dimensions */
682                 sub_v3_v3v3(dim, grid->grid_bounds.max, grid->grid_bounds.min);
683                 copy_v3_v3(td, dim);
684                 min_dim = MAX3(td[0],td[1],td[2]) / 1000.f;
685
686                 /* deactivate zero axises */
687                 for (i=0; i<3; i++) {
688                         if (td[i]<min_dim) {td[i]=1.0f; axis-=1;}
689                 }
690
691                 if (axis == 0 || MAX3(td[0],td[1],td[2]) < 0.0001f) {
692                         MEM_freeN(grid_bounds);
693                         MEM_freeN(bData->grid);
694                         bData->grid = NULL;
695                         return;
696                 }
697
698                 /* now calculate grid volume/area/width depending on num of active axis */
699                 volume = td[0]*td[1]*td[2];
700
701                 /* determine final grid size by trying to fit average 10.000 points per grid cell */
702                 dim_factor = (float)pow(volume / ((double)sData->total_points / 10000.0), 1.0/(double)axis);
703
704                 /* define final grid size using dim_factor, use min 3 for active axises */
705                 for (i=0; i<3; i++) {
706                         grid->dim[i] = (int)floor(td[i] / dim_factor);
707                         CLAMP(grid->dim[i], (dim[i]>=min_dim) ? 3 : 1, 100);
708                 }
709                 grid_cells = grid->dim[0]*grid->dim[1]*grid->dim[2];
710
711                 /* allocate memory for grids */
712                 grid->bounds = MEM_callocN(sizeof(Bounds3D) * grid_cells, "Surface Grid Bounds");
713                 grid->s_pos = MEM_callocN(sizeof(int) * grid_cells, "Surface Grid Position");
714                 grid->s_num = MEM_callocN(sizeof(int) * grid_cells*num_of_threads, "Surface Grid Points");
715                 temp_s_num = MEM_callocN(sizeof(int) * grid_cells, "Temp Surface Grid Points");
716                 grid->t_index = MEM_callocN(sizeof(int) * sData->total_points, "Surface Grid Target Ids");
717                 temp_t_index = MEM_callocN(sizeof(int) * sData->total_points, "Temp Surface Grid Target Ids");
718
719                 /* in case of an allocation failture abort here */
720                 if (!grid->bounds || !grid->s_pos || !grid->s_num || !grid->t_index || !temp_s_num || !temp_t_index)
721                         error = 1;
722
723                 if (!error) {
724                         /* calculate number of points withing each cell */
725                         #pragma omp parallel for schedule(static)
726                         for (i=0; i<sData->total_points; i++) {
727                                 int co[3], j;
728                                 for (j=0; j<3; j++) {
729                                         co[j] = (int)floor((bData->realCoord[bData->s_pos[i]].v[j] - grid->grid_bounds.min[j])/dim[j]*grid->dim[j]);
730                                         CLAMP(co[j], 0, grid->dim[j]-1);
731                                 }
732
733                                 temp_t_index[i] = co[0] + co[1] * grid->dim[0] + co[2] * grid->dim[0]*grid->dim[1];
734                                 #ifdef _OPENMP
735                                 grid->s_num[temp_t_index[i]+omp_get_thread_num()*grid_cells]++;
736                                 #else
737                                 grid->s_num[temp_t_index[i]]++;
738                                 #endif
739                         }
740
741                         /* for first cell only calc s_num */
742                         for (i=1; i<num_of_threads; i++) {
743                                 grid->s_num[0] += grid->s_num[i*grid_cells];
744                         }
745
746                         /* calculate grid indexes */
747                         for (i=1; i<grid_cells; i++) {
748                                 int id;
749                                 for (id=1; id<num_of_threads; id++) {
750                                         grid->s_num[i] += grid->s_num[i+id*grid_cells];
751                                 }
752                                 grid->s_pos[i] = grid->s_pos[i-1] + grid->s_num[i-1];
753                         }
754
755                         /* save point indexes to final array */
756                         for (i=0; i<sData->total_points; i++) {
757                                 int pos = grid->s_pos[temp_t_index[i]] + temp_s_num[temp_t_index[i]];
758                                 grid->t_index[pos] = i;
759
760                                 temp_s_num[temp_t_index[i]]++;
761                         }
762
763                         /* calculate cell bounds */
764                         {
765                                 int x;
766                                 #pragma omp parallel for schedule(static)
767                                 for (x=0; x<grid->dim[0]; x++) {
768                                         int y;
769                                         for (y=0; y<grid->dim[1]; y++) {
770                                                 int z;
771                                                 for (z=0; z<grid->dim[2]; z++) {
772                                                         int j, b_index = x + y * grid->dim[0] + z * grid->dim[0]*grid->dim[1];
773                                                         /* set bounds */
774                                                         for (j=0; j<3; j++) {
775                                                                 int s = (j==0) ? x : ((j==1) ? y : z);
776                                                                 grid->bounds[b_index].min[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*s;
777                                                                 grid->bounds[b_index].max[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*(s+1);
778                                                         }
779                                                         grid->bounds[b_index].valid = 1;
780                                                 }
781                                         }
782                                 }
783                         }
784                 }
785
786                 if (temp_s_num) MEM_freeN(temp_s_num);
787                 if (temp_t_index) MEM_freeN(temp_t_index);
788
789                 /* free per thread s_num values */
790                 grid->s_num = MEM_reallocN(grid->s_num, sizeof(int) * grid_cells);
791
792                 if (error || !grid->s_num) {
793                         setError(surface->canvas, "Not enough free memory.");
794                         freeGrid(sData);
795                 }
796         }
797
798         if (grid_bounds) MEM_freeN(grid_bounds);
799 }
800
801 /***************************** Freeing data ******************************/
802
803 /* Free brush data */
804 void dynamicPaint_freeBrush(struct DynamicPaintModifierData *pmd)
805 {
806         if(pmd->brush) {
807                 if(pmd->brush->dm)
808                         pmd->brush->dm->release(pmd->brush->dm);
809                 pmd->brush->dm = NULL;
810
811                 if(pmd->brush->paint_ramp)
812                          MEM_freeN(pmd->brush->paint_ramp);
813                 pmd->brush->paint_ramp = NULL;
814                 if(pmd->brush->vel_ramp)
815                          MEM_freeN(pmd->brush->vel_ramp);
816                 pmd->brush->vel_ramp = NULL;
817
818                 MEM_freeN(pmd->brush);
819                 pmd->brush = NULL;
820         }
821 }
822
823 static void dynamicPaint_freeAdjData(PaintSurfaceData *data)
824 {
825         if (data->adj_data) {
826                 if (data->adj_data->n_index) MEM_freeN(data->adj_data->n_index);
827                 if (data->adj_data->n_num) MEM_freeN(data->adj_data->n_num);
828                 if (data->adj_data->n_target) MEM_freeN(data->adj_data->n_target);
829                 if (data->adj_data->flags) MEM_freeN(data->adj_data->flags);
830                 MEM_freeN(data->adj_data);
831                 data->adj_data = NULL;
832         }
833 }
834
835 static void free_bakeData(PaintSurfaceData *data)
836 {
837         PaintBakeData *bData = data->bData;
838         if (bData) {
839                 if (bData->bNormal) MEM_freeN(bData->bNormal);
840                 if (bData->s_pos) MEM_freeN(bData->s_pos);
841                 if (bData->s_num) MEM_freeN(bData->s_num);
842                 if (bData->realCoord) MEM_freeN(bData->realCoord);
843                 if (bData->bNeighs) MEM_freeN(bData->bNeighs);
844                 if (bData->grid) freeGrid(data);
845                 if (bData->prev_verts) MEM_freeN(bData->prev_verts);
846                 if (bData->velocity) MEM_freeN(bData->velocity);
847                 if (bData->prev_velocity) MEM_freeN(bData->prev_velocity);
848
849                 MEM_freeN(data->bData);
850                 data->bData = NULL;
851         }
852 }
853
854 /* free surface data if it's not used anymore */
855 void surface_freeUnusedData(DynamicPaintSurface *surface)
856 {
857         if (!surface->data) return;
858
859         /* free bakedata if not active or surface is baked */
860         if (!(surface->flags & MOD_DPAINT_ACTIVE) ||
861                 (surface->pointcache && surface->pointcache->flag & PTCACHE_BAKED))
862                 free_bakeData(surface->data);
863 }
864
865 void dynamicPaint_freeSurfaceData(DynamicPaintSurface *surface)
866 {
867         PaintSurfaceData *data = surface->data;
868         if (!data) return;
869         if (data->format_data) {
870                 /* format specific free */
871                 if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
872                         ImgSeqFormatData *format_data = (ImgSeqFormatData*)data->format_data;
873                         if (format_data->uv_p)
874                                 MEM_freeN(format_data->uv_p);
875                         if (format_data->barycentricWeights)
876                                 MEM_freeN(format_data->barycentricWeights);
877                 }
878                 MEM_freeN(data->format_data);
879         }
880         /* type data */
881         if (data->type_data) MEM_freeN(data->type_data);
882         dynamicPaint_freeAdjData(data);
883         /* bake data */
884         free_bakeData(data);
885
886         MEM_freeN(surface->data);
887         surface->data = NULL;
888 }
889
890 void dynamicPaint_freeSurface(DynamicPaintSurface *surface)
891 {
892         /* point cache */
893         BKE_ptcache_free_list(&(surface->ptcaches));
894         surface->pointcache = NULL;
895
896         if(surface->effector_weights)
897                 MEM_freeN(surface->effector_weights);
898         surface->effector_weights = NULL;
899
900         BLI_remlink(&(surface->canvas->surfaces), surface);
901         dynamicPaint_freeSurfaceData(surface);
902         MEM_freeN(surface);
903 }
904
905 /* Free canvas data */
906 void dynamicPaint_freeCanvas(DynamicPaintModifierData *pmd)
907 {
908         if(pmd->canvas) {
909                 /* Free surface data */
910                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
911                 DynamicPaintSurface *next_surface = NULL;
912
913                 while (surface) {
914                         next_surface = surface->next;
915                         dynamicPaint_freeSurface(surface);
916                         surface = next_surface;
917                 }
918
919                 /* free dm copy */
920                 if (pmd->canvas->dm)
921                         pmd->canvas->dm->release(pmd->canvas->dm);
922                 pmd->canvas->dm = NULL;
923
924                 MEM_freeN(pmd->canvas);
925                 pmd->canvas = NULL;
926         }
927 }
928
929 /* Free whole dp modifier */
930 void dynamicPaint_Modifier_free(struct DynamicPaintModifierData *pmd)
931 {
932         if(pmd) {
933                 dynamicPaint_freeCanvas(pmd);
934                 dynamicPaint_freeBrush(pmd);
935         }
936 }
937
938
939 /***************************** Initialize and reset ******************************/
940
941 /*
942 *       Creates a new surface and adds it to the list
943 *       If scene is null, frame range of 1-250 is used
944 *       A pointer to this surface is returned
945 */
946 struct DynamicPaintSurface *dynamicPaint_createNewSurface(DynamicPaintCanvasSettings *canvas, Scene *scene)
947 {
948         DynamicPaintSurface *surface= MEM_callocN(sizeof(DynamicPaintSurface), "DynamicPaintSurface");
949         if (!surface) return NULL;
950
951         surface->canvas = canvas;
952         surface->format = MOD_DPAINT_SURFACE_F_VERTEX;
953         surface->type = MOD_DPAINT_SURFACE_T_PAINT;
954
955         /* cache */
956         surface->pointcache = BKE_ptcache_add(&(surface->ptcaches));
957         surface->pointcache->flag |= PTCACHE_DISK_CACHE;
958         surface->pointcache->step = 1;
959
960         /* Set initial values */
961         surface->flags = MOD_DPAINT_ANTIALIAS | MOD_DPAINT_MULALPHA | MOD_DPAINT_DRY_LOG | MOD_DPAINT_DISSOLVE_LOG |
962                                          MOD_DPAINT_ACTIVE | MOD_DPAINT_PREVIEW | MOD_DPAINT_OUT1;
963         surface->effect = 0;
964         surface->effect_ui = 1;
965
966         surface->diss_speed = 250;
967         surface->dry_speed = 500;
968         surface->depth_clamp = 0.0f;
969         surface->disp_factor = 1.0f;
970         surface->disp_type = MOD_DPAINT_DISP_DISPLACE;
971         surface->image_fileformat = MOD_DPAINT_IMGFORMAT_PNG;
972
973         surface->init_color[0] = 1.0f;
974         surface->init_color[1] = 1.0f;
975         surface->init_color[2] = 1.0f;
976         surface->init_color[3] = 1.0f;
977
978         surface->image_resolution = 256;
979         surface->substeps = 0;
980
981         if (scene) {
982                 surface->start_frame = scene->r.sfra;
983                 surface->end_frame = scene->r.efra;
984         }
985         else {
986                 surface->start_frame = 1;
987                 surface->end_frame = 250;
988         }
989
990         surface->spread_speed = 1.0f;
991         surface->color_spread_speed = 1.0f;
992         surface->shrink_speed = 1.0f;
993
994         surface->wave_damping = 0.04f;
995         surface->wave_speed = 1.0f;
996         surface->wave_timescale = 1.0f;
997         surface->wave_spring = 0.20f;
998
999         modifier_path_init(surface->image_output_path, sizeof(surface->image_output_path), "cache_dynamicpaint");
1000
1001         dynamicPaintSurface_setUniqueName(surface, "Surface");
1002
1003         surface->effector_weights = BKE_add_effector_weights(NULL);
1004
1005         dynamicPaintSurface_updateType(surface);
1006
1007         BLI_addtail(&canvas->surfaces, surface);
1008
1009         return surface;
1010 }
1011
1012 /*
1013 *       Initialize modifier data
1014 */
1015 int dynamicPaint_createType(struct DynamicPaintModifierData *pmd, int type, struct Scene *scene)
1016 {
1017         if(pmd) {
1018                 if(type == MOD_DYNAMICPAINT_TYPE_CANVAS) {
1019                         DynamicPaintCanvasSettings *canvas;
1020                         if(pmd->canvas)
1021                                 dynamicPaint_freeCanvas(pmd);
1022
1023                         canvas = pmd->canvas = MEM_callocN(sizeof(DynamicPaintCanvasSettings), "DynamicPaint Canvas");
1024                         if (!canvas)
1025                                 return 0;
1026                         canvas->pmd = pmd;
1027                         canvas->dm = NULL;
1028
1029                         /* Create one surface */
1030                         if (!dynamicPaint_createNewSurface(canvas, scene))
1031                                 return 0;
1032
1033                 }
1034                 else if(type == MOD_DYNAMICPAINT_TYPE_BRUSH) {
1035                         DynamicPaintBrushSettings *brush;
1036                         if(pmd->brush)
1037                                 dynamicPaint_freeBrush(pmd);
1038
1039                         brush = pmd->brush = MEM_callocN(sizeof(DynamicPaintBrushSettings), "DynamicPaint Paint");
1040                         if (!brush)
1041                                 return 0;
1042                         brush->pmd = pmd;
1043
1044                         brush->psys = NULL;
1045
1046                         brush->flags = MOD_DPAINT_ABS_ALPHA | MOD_DPAINT_RAMP_ALPHA;
1047                         brush->collision = MOD_DPAINT_COL_VOLUME;
1048                         
1049                         brush->mat = NULL;
1050                         brush->r = 0.15f;
1051                         brush->g = 0.4f;
1052                         brush->b = 0.8f;
1053                         brush->alpha = 1.0f;
1054                         brush->wetness = 1.0f;
1055
1056                         brush->paint_distance = 1.0f;
1057                         brush->proximity_falloff = MOD_DPAINT_PRFALL_SMOOTH;
1058
1059                         brush->particle_radius = 0.2f;
1060                         brush->particle_smooth = 0.05f;
1061
1062                         brush->wave_type = MOD_DPAINT_WAVEB_CHANGE;
1063                         brush->wave_factor = 1.0f;
1064                         brush->wave_clamp = 0.0f;
1065                         brush->smudge_strength = 0.3f;
1066                         brush->max_velocity = 1.0f;
1067
1068                         brush->dm = NULL;
1069
1070                         /* Paint proximity falloff colorramp. */
1071                         {
1072                                 CBData *ramp;
1073
1074                                 brush->paint_ramp = add_colorband(0);
1075                                 if (!brush->paint_ramp)
1076                                         return 0;
1077                                 ramp = brush->paint_ramp->data;
1078                                 /* Add default smooth-falloff ramp.     */
1079                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = 1.0f;
1080                                 ramp[0].pos = 0.0f;
1081                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].pos = 1.0f;
1082                                 ramp[1].a = 0.0f;
1083                                 pmd->brush->paint_ramp->tot = 2;
1084                         }
1085
1086                         /* Brush velocity ramp. */
1087                         {
1088                                 CBData *ramp;
1089
1090                                 brush->vel_ramp = add_colorband(0);
1091                                 if (!brush->vel_ramp)
1092                                         return 0;
1093                                 ramp = brush->vel_ramp->data;
1094                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = ramp[0].pos = 0.0f;
1095                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].a = ramp[1].pos = 1.0f;
1096                                 brush->paint_ramp->tot = 2;
1097                         }
1098                 }
1099         }
1100         else
1101                 return 0;
1102
1103         return 1;
1104 }
1105
1106 void dynamicPaint_Modifier_copy(struct DynamicPaintModifierData *pmd, struct DynamicPaintModifierData *tpmd)
1107 {
1108         /* Init modifier        */
1109         tpmd->type = pmd->type;
1110         if (pmd->canvas)
1111                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_CANVAS, NULL);
1112         if (pmd->brush)
1113                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_BRUSH, NULL);
1114
1115         /* Copy data    */
1116         if (tpmd->canvas) {
1117                 tpmd->canvas->pmd = tpmd;
1118
1119         } else if (tpmd->brush) {
1120                 DynamicPaintBrushSettings *brush = pmd->brush, *t_brush = tpmd->brush;
1121                 t_brush->pmd = tpmd;
1122
1123                 t_brush->flags = brush->flags;
1124                 t_brush->collision = brush->collision;
1125
1126                 t_brush->mat = brush->mat;
1127                 t_brush->r = brush->r;
1128                 t_brush->g = brush->g;
1129                 t_brush->b = brush->b;
1130                 t_brush->alpha = brush->alpha;
1131                 t_brush->wetness = brush->wetness;
1132
1133                 t_brush->particle_radius = brush->particle_radius;
1134                 t_brush->particle_smooth = brush->particle_smooth;
1135                 t_brush->paint_distance = brush->paint_distance;
1136                 t_brush->psys = brush->psys;
1137
1138                 if (brush->paint_ramp)
1139                         memcpy(t_brush->paint_ramp, brush->paint_ramp, sizeof(ColorBand));
1140                 if (brush->vel_ramp)
1141                         memcpy(t_brush->vel_ramp, brush->vel_ramp, sizeof(ColorBand));
1142
1143                 t_brush->proximity_falloff = brush->proximity_falloff;
1144                 t_brush->wave_type = brush->wave_type;
1145                 t_brush->ray_dir = brush->ray_dir;
1146
1147                 t_brush->wave_factor = brush->wave_factor;
1148                 t_brush->wave_clamp = brush->wave_clamp;
1149                 t_brush->max_velocity = brush->max_velocity;
1150                 t_brush->smudge_strength = brush->smudge_strength;
1151         }
1152 }
1153
1154 /* allocates surface data depending on surface type */
1155 static void dynamicPaint_allocateSurfaceType(DynamicPaintSurface *surface)
1156 {
1157         PaintSurfaceData *sData = surface->data;
1158
1159         switch (surface->type) {
1160                 case MOD_DPAINT_SURFACE_T_PAINT:
1161                         sData->type_data = MEM_callocN(sizeof(PaintPoint)*sData->total_points, "DynamicPaintSurface Data");
1162                         break;
1163                 case MOD_DPAINT_SURFACE_T_DISPLACE:
1164                         sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface DepthData");
1165                         break;
1166                 case MOD_DPAINT_SURFACE_T_WEIGHT:
1167                         sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface WeightData");
1168                         break;
1169                 case MOD_DPAINT_SURFACE_T_WAVE:
1170                         sData->type_data = MEM_callocN(sizeof(PaintWavePoint)*sData->total_points, "DynamicPaintSurface WaveData");
1171                         break;
1172         }
1173
1174         if (sData->type_data == NULL) setError(surface->canvas, "Not enough free memory!");
1175 }
1176
1177 static int surface_usesAdjDistance(DynamicPaintSurface *surface)
1178 {
1179         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT && surface->effect) return 1;
1180         if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 1;
1181         return 0;
1182 }
1183
1184 static int surface_usesAdjData(DynamicPaintSurface *surface)
1185 {
1186         if (surface_usesAdjDistance(surface)) return 1;
1187         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
1188                 surface->flags & MOD_DPAINT_ANTIALIAS) return 1;
1189
1190         return 0;
1191 }
1192
1193 /* initialize surface adjacency data */
1194 static void dynamicPaint_initAdjacencyData(DynamicPaintSurface *surface, int force_init)
1195 {
1196         PaintSurfaceData *sData = surface->data;
1197         PaintAdjData *ed;
1198         int *temp_data;
1199         int neigh_points = 0;
1200
1201         if (!surface_usesAdjData(surface) && !force_init) return;
1202
1203         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1204                 /* For vertex format, neighbours are connected by edges */
1205                 neigh_points = 2*surface->canvas->dm->getNumEdges(surface->canvas->dm);
1206         }
1207         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ)
1208                 neigh_points = sData->total_points*8;
1209
1210         if (!neigh_points) return;
1211
1212         /* allocate memory */
1213         ed = sData->adj_data = MEM_callocN(sizeof(PaintAdjData), "Surface Adj Data");
1214         if (!ed) return;
1215         ed->n_index = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Index");
1216         ed->n_num = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Counts");
1217         temp_data = MEM_callocN(sizeof(int)*sData->total_points, "Temp Adj Data");
1218         ed->n_target = MEM_callocN(sizeof(int)*neigh_points, "Surface Adj Targets");
1219         ed->flags = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Flags");
1220         ed->total_targets = neigh_points;
1221
1222         /* in case of allocation error, free memory */
1223         if (!ed->n_index || !ed->n_num || !ed->n_target || !temp_data) {
1224                 dynamicPaint_freeAdjData(sData);
1225                 if (temp_data) MEM_freeN(temp_data);
1226                 setError(surface->canvas, "Not enough free memory.");
1227                 return;
1228         }
1229
1230         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1231                 int i;
1232                 int n_pos;
1233
1234                 /* For vertex format, count every vertex that is connected by an edge */
1235                 int numOfEdges = surface->canvas->dm->getNumEdges(surface->canvas->dm);
1236                 int numOfFaces = surface->canvas->dm->getNumTessFaces(surface->canvas->dm);
1237                 struct MEdge *edge =  surface->canvas->dm->getEdgeArray(surface->canvas->dm);
1238                 struct MFace *face =  surface->canvas->dm->getTessFaceArray(surface->canvas->dm);
1239
1240                 /* count number of edges per vertex */
1241                 for (i=0; i<numOfEdges; i++) {
1242                         ed->n_num[edge[i].v1]++;
1243                         ed->n_num[edge[i].v2]++;
1244
1245                         temp_data[edge[i].v1]++;
1246                         temp_data[edge[i].v2]++;
1247                 }
1248
1249                 /* to locate points on "mesh edge" */
1250                 for (i=0; i<numOfFaces; i++) {
1251                         temp_data[face[i].v1]++;
1252                         temp_data[face[i].v2]++;
1253                         temp_data[face[i].v3]++;
1254                         if (face[i].v4)
1255                                 temp_data[face[i].v4]++;
1256                 }
1257
1258                 /* now check if total number of edges+faces for
1259                 *  each vertex is even, if not -> vertex is on mesh edge */
1260                 for (i=0; i<sData->total_points; i++) {
1261                         if ((temp_data[i]%2) ||
1262                                 temp_data[i] < 4)
1263                                 ed->flags[i] |= ADJ_ON_MESH_EDGE;
1264                                 
1265                         /* reset temp data */ 
1266                         temp_data[i] = 0;
1267                 }
1268
1269                 /* order n_index array */
1270                 n_pos = 0;
1271                 for (i=0; i<sData->total_points; i++) {
1272                         ed->n_index[i] = n_pos;
1273                         n_pos += ed->n_num[i];
1274                 }
1275
1276                 /* and now add neighbour data using that info */
1277                 for (i=0; i<numOfEdges; i++) {
1278                         /* first vertex */
1279                         int index = edge[i].v1;
1280                         n_pos = ed->n_index[index]+temp_data[index];
1281                         ed->n_target[n_pos] = edge[i].v2;
1282                         temp_data[index]++;
1283
1284                         /* second vertex */
1285                         index = edge[i].v2;
1286                         n_pos = ed->n_index[index]+temp_data[index];
1287                         ed->n_target[n_pos] = edge[i].v1;
1288                         temp_data[index]++;
1289                 }
1290         }
1291         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1292                 /* for image sequences, only allocate memory.
1293                 *  bake initialization takes care of rest */
1294         }
1295
1296         MEM_freeN(temp_data);
1297 }
1298
1299 void dynamicPaint_setInitialColor(DynamicPaintSurface *surface)
1300 {
1301         PaintSurfaceData *sData = surface->data;
1302         PaintPoint* pPoint = (PaintPoint*)sData->type_data;
1303         DerivedMesh *dm = surface->canvas->dm;
1304         int i;
1305
1306         if (surface->type != MOD_DPAINT_SURFACE_T_PAINT)
1307                 return;
1308
1309         if (surface->init_color_type == MOD_DPAINT_INITIAL_NONE)
1310                 return;
1311         /* Single color */
1312         else if (surface->init_color_type == MOD_DPAINT_INITIAL_COLOR) {
1313                 /* apply color to every surface point */
1314                 #pragma omp parallel for schedule(static)
1315                 for (i=0; i<sData->total_points; i++) {
1316                         copy_v3_v3(pPoint[i].color, surface->init_color);
1317                         pPoint[i].alpha = surface->init_color[3];
1318                 }
1319         }
1320         /* UV mapped texture */
1321         else if (surface->init_color_type == MOD_DPAINT_INITIAL_TEXTURE) {
1322                 Tex *tex = surface->init_texture;
1323                 MTFace *tface;
1324                 MFace *mface = dm->getTessFaceArray(dm);
1325                 int numOfFaces = dm->getNumTessFaces(dm);
1326                 char uvname[40];
1327
1328                 if (!tex) return;
1329
1330                 /* get uv map */
1331                 CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->init_layername, uvname);
1332                 tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1333                 if (!tface) return;
1334
1335                 /* for vertex surface loop through tfaces and find uv color
1336                 *  that provides highest alpha */
1337                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1338                         #pragma omp parallel for schedule(static)
1339                         for (i=0; i<numOfFaces; i++) {
1340                                 int numOfVert = (mface[i].v4) ? 4 : 3;
1341                                 float uv[3] = {0.0f};
1342                                 int j;
1343                                 for (j=0; j<numOfVert; j++) {
1344                                         TexResult texres = {0};
1345                                         unsigned int *vert = (&mface[i].v1)+j;
1346
1347                                         /* remap to -1.0 to 1.0 */
1348                                         uv[0] = tface[i].uv[j][0]*2.0f - 1.0f;
1349                                         uv[1] = tface[i].uv[j][1]*2.0f - 1.0f;
1350
1351                                         multitex_ext_safe(tex, uv, &texres);
1352
1353                                         if (texres.tin > pPoint[*vert].alpha) {
1354                                                 copy_v3_v3(pPoint[*vert].color, &texres.tr);
1355                                                 pPoint[*vert].alpha = texres.tin;
1356                                         }
1357                                 }
1358                         }
1359                 }
1360                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1361                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
1362                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1363
1364                         #pragma omp parallel for schedule(static)
1365                         for (i=0; i<sData->total_points; i++) {
1366                                 float uv[9] = {0.0f};
1367                                 float uv_final[3] = {0.0f};
1368                                 int j;
1369                                 TexResult texres = {0};
1370
1371                                 /* collect all uvs */
1372                                 for (j=0; j<3; j++) {
1373                                         int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j;
1374                                         copy_v2_v2(&uv[j*3], tface[f_data->uv_p[i].face_index].uv[v]);
1375                                 }
1376
1377                                 /* interpolate final uv pos */
1378                                 interp_v3_v3v3v3(       uv_final, &uv[0], &uv[3], &uv[6],
1379                                         f_data->barycentricWeights[i*samples].v);
1380                                 /* remap to -1.0 to 1.0 */
1381                                 uv_final[0] = uv_final[0]*2.0f - 1.0f;
1382                                 uv_final[1] = uv_final[1]*2.0f - 1.0f;
1383                                         
1384                                 multitex_ext_safe(tex, uv_final, &texres);
1385
1386                                 /* apply color */
1387                                 copy_v3_v3(pPoint[i].color, &texres.tr);
1388                                 pPoint[i].alpha = texres.tin;
1389                         }
1390                 }
1391         }
1392         /* vertex color layer */
1393         else if (surface->init_color_type == MOD_DPAINT_INITIAL_VERTEXCOLOR) {
1394                 MCol *col = CustomData_get_layer_named(&dm->faceData, CD_MCOL, surface->init_layername);
1395                 if (!col) return;
1396
1397                 /* for vertex surface, just copy colors from mcol */
1398                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1399                         MFace *mface = dm->getTessFaceArray(dm);
1400                         int numOfFaces = dm->getNumTessFaces(dm);
1401
1402                         #pragma omp parallel for schedule(static)
1403                         for (i=0; i<numOfFaces; i++) {
1404                                 int numOfVert = (mface[i].v4) ? 4 : 3;
1405                                 int j;
1406                                 for (j=0; j<numOfVert; j++) {
1407                                         unsigned int *vert = ((&mface[i].v1)+j);
1408
1409                                         pPoint[*vert].color[0] = 1.0f/255.f*(float)col[i*4+j].b;
1410                                         pPoint[*vert].color[1] = 1.0f/255.f*(float)col[i*4+j].g;
1411                                         pPoint[*vert].color[2] = 1.0f/255.f*(float)col[i*4+j].r;
1412                                         pPoint[*vert].alpha = 1.0f/255.f*(float)col[i*4+j].a;
1413                                 }
1414                         }
1415                 }
1416                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1417                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
1418                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1419
1420                         #pragma omp parallel for schedule(static)
1421                         for (i=0; i<sData->total_points; i++) {
1422                                 int face_ind = f_data->uv_p[i].face_index;
1423                                 float colors[3][4] = {{0.0f,0.0f,0.0f,0.0f}};
1424                                 float final_color[4];
1425                                 int j;
1426                                 /* collect color values */
1427                                 for (j=0; j<3; j++) {
1428                                         int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j;
1429                                         colors[j][0] = 1.0f/255.f*(float)col[face_ind*4+v].b;
1430                                         colors[j][1] = 1.0f/255.f*(float)col[face_ind*4+v].g;
1431                                         colors[j][2] = 1.0f/255.f*(float)col[face_ind*4+v].r;
1432                                         colors[j][3] = 1.0f/255.f*(float)col[face_ind*4+v].a;
1433                                 }
1434                                 
1435                                 /* interpolate final color */
1436                                 interp_v4_v4v4v4(       final_color, colors[0], colors[1], colors[2],
1437                                                 f_data->barycentricWeights[i*samples].v);
1438
1439                                 copy_v3_v3(pPoint[i].color, final_color);
1440                                 pPoint[i].alpha = final_color[3];
1441                         }
1442                 }
1443         }
1444 }
1445
1446 /* clears surface data back to zero */
1447 void dynamicPaint_clearSurface(DynamicPaintSurface *surface)
1448 {
1449         PaintSurfaceData *sData = surface->data;
1450         if (sData && sData->type_data) {
1451                 unsigned int data_size;
1452
1453                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1454                         data_size = sizeof(PaintPoint);
1455                 else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE)
1456                         data_size = sizeof(PaintWavePoint);
1457                 else
1458                         data_size = sizeof(float);
1459
1460                 memset(sData->type_data, 0, data_size * sData->total_points);
1461
1462                 /* set initial color */
1463                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1464                         dynamicPaint_setInitialColor(surface);
1465
1466                 if (sData->bData)
1467                         sData->bData->clear = 1;
1468         }
1469 }
1470
1471 /* completely (re)initializes surface (only for point cache types)*/
1472 int dynamicPaint_resetSurface(DynamicPaintSurface *surface)
1473 {
1474         int numOfPoints = dynamicPaint_surfaceNumOfPoints(surface);
1475         /* dont touch image sequence types. they get handled only on bake */
1476         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 1;
1477
1478         if (surface->data) dynamicPaint_freeSurfaceData(surface);
1479         if (numOfPoints < 1) return 0;
1480
1481         /* allocate memory */
1482         surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
1483         if (!surface->data) return 0;
1484
1485         /* allocate data depending on surface type and format */
1486         surface->data->total_points = numOfPoints;
1487         dynamicPaint_allocateSurfaceType(surface);
1488         dynamicPaint_initAdjacencyData(surface, 0);
1489
1490         /* set initial color */
1491         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1492                 dynamicPaint_setInitialColor(surface);
1493
1494         return 1;
1495 }
1496
1497 /* make sure allocated surface size matches current requirements */
1498 static int dynamicPaint_checkSurfaceData(DynamicPaintSurface *surface)
1499 {
1500         if (!surface->data || ((dynamicPaint_surfaceNumOfPoints(surface) != surface->data->total_points))) {
1501                 return dynamicPaint_resetSurface(surface);
1502         }
1503         return 1;
1504 }
1505
1506
1507 /***************************** Modifier processing ******************************/
1508
1509
1510 /* apply displacing vertex surface to the derived mesh */
1511 static void dynamicPaint_applySurfaceDisplace(DynamicPaintSurface *surface, DerivedMesh *result, int update_normals)
1512 {
1513         PaintSurfaceData *sData = surface->data;
1514
1515         if (!sData || surface->format != MOD_DPAINT_SURFACE_F_VERTEX) return;
1516
1517         /* displace paint */
1518         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
1519                 MVert *mvert = result->getVertArray(result);
1520                 int i;
1521                 float* value = (float*)sData->type_data;
1522
1523                 #pragma omp parallel for schedule(static)
1524                 for (i=0; i<sData->total_points; i++) {
1525                         float normal[3], val=value[i]*surface->disp_factor;
1526                         normal_short_to_float_v3(normal, mvert[i].no);
1527                         normalize_v3(normal);
1528
1529                         mvert[i].co[0] -= normal[0]*val;
1530                         mvert[i].co[1] -= normal[1]*val;
1531                         mvert[i].co[2] -= normal[2]*val;
1532                 }
1533         }
1534         else return;
1535
1536         if (update_normals)
1537                 CDDM_calc_normals(result);
1538 }
1539
1540 /*
1541 *       Apply canvas data to the object derived mesh
1542 */
1543 static struct DerivedMesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd,
1544                                                        Object *ob,
1545                                                        DerivedMesh *dm)
1546 {       
1547         DerivedMesh *result = CDDM_copy(dm, 0);
1548
1549         if(pmd->canvas && !(pmd->canvas->flags & MOD_DPAINT_BAKING)) {
1550
1551                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
1552                 pmd->canvas->flags &= ~MOD_DPAINT_PREVIEW_READY;
1553
1554                 /* loop through surfaces */
1555                 for (; surface; surface=surface->next) {
1556                         PaintSurfaceData *sData = surface->data;
1557
1558                         if (surface && surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ && sData) {
1559                                 if (!(surface->flags & (MOD_DPAINT_ACTIVE))) continue;
1560
1561                                 /* process vertex surface previews */
1562                                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1563
1564                                         /* vertex color paint */
1565                                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
1566
1567                                                 int i;
1568                                                 PaintPoint* pPoint = (PaintPoint*)sData->type_data;
1569                                                 MLoopCol *col = NULL;
1570                                                 MLoop *mloop = CDDM_get_loops(result);
1571                                                 int totloop = result->numLoopData;
1572
1573                                                 /* paint is stored on dry and wet layers, so mix final color first */
1574                                                 float *fcolor = MEM_callocN(sizeof(float)*sData->total_points*4, "Temp paint color");
1575
1576                                                 #pragma omp parallel for schedule(static)
1577                                                 for (i=0; i<sData->total_points; i++) {
1578                                                         /* blend dry and wet layer */
1579                                                         blendColors(pPoint[i].color, pPoint[i].alpha, pPoint[i].e_color, pPoint[i].e_alpha, &fcolor[i*4]);
1580                                                 }
1581
1582                                                 /* viewport preview */
1583                                                 if (0 && surface->flags & MOD_DPAINT_PREVIEW) {
1584                                                         MPoly *mp = CDDM_get_polys(result);
1585                                                         int totpoly = result->numPolyData;
1586
1587                                                         /* Save preview results to weight layer to be
1588                                                         *   able to share same drawing methods */
1589                                                         col = CustomData_get_layer(&dm->loopData, CD_WEIGHT_MLOOPCOL);
1590                                                         if (!col) col = CustomData_add_layer(&dm->loopData, CD_WEIGHT_MLOOPCOL, CD_CALLOC, NULL, totloop);
1591
1592                                                         if (col) {
1593                                                                 #pragma omp parallel for schedule(static)
1594                                                                 for (i=0; i<totpoly; i++) {
1595                                                                         int j=0;
1596                                                                         Material *material = give_current_material(ob, mp[i].mat_nr+1);
1597
1598                                                                         for (; j<mp[i].totloop; j++) {
1599                                                                                 int l_index = mp[i].loopstart + j;
1600                                                                                 int v_index = mloop[l_index].v;
1601
1602                                                                                 if (surface->preview_id == MOD_DPAINT_SURFACE_PREV_PAINT) {
1603                                                                                         float c[3];
1604                                                                                         v_index *= 4;
1605
1606                                                                                         /* Apply material color as base vertex color for preview */
1607                                                                                         col[l_index].a = 255;
1608                                                                                         if (material) {
1609                                                                                                 c[0] = material->r;
1610                                                                                                 c[1] = material->g;
1611                                                                                                 c[2] = material->b;
1612                                                                                         }
1613                                                                                         else { /* default grey */
1614                                                                                                 c[0] = 0.65f;
1615                                                                                                 c[1] = 0.65f;
1616                                                                                                 c[2] = 0.65f;
1617                                                                                         }
1618                                                                                         /* mix surface color */
1619                                                                                         interp_v3_v3v3(c, c, &fcolor[v_index], fcolor[v_index+3]);
1620
1621                                                                                         col[l_index].r = FTOCHAR(c[2]);
1622                                                                                         col[l_index].g = FTOCHAR(c[1]);
1623                                                                                         col[l_index].b = FTOCHAR(c[0]);
1624                                                                                 }
1625                                                                                 else {
1626                                                                                         col[l_index].a = 255;
1627                                                                                         col[l_index].r = FTOCHAR(pPoint[v_index].wetness);
1628                                                                                         col[l_index].g = FTOCHAR(pPoint[v_index].wetness);
1629                                                                                         col[l_index].b = FTOCHAR(pPoint[v_index].wetness);
1630                                                                                 }
1631                                                                         }
1632                                                                 }
1633                                                                 pmd->canvas->flags |= MOD_DPAINT_PREVIEW_READY;
1634                                                         }
1635                                                 }
1636
1637
1638                                                 /* save layer data to output layer */
1639
1640                                                 /* paint layer */
1641                                                 col = CustomData_get_layer_named(&result->loopData, CD_MLOOPCOL, surface->output_name);
1642                                                 /* if output layer is lost from a constructive modifier, re-add it */
1643                                                 if (!col && dynamicPaint_outputLayerExists(surface, ob, 0))
1644                                                         col = CustomData_add_layer_named(&result->loopData, CD_MLOOPCOL, CD_CALLOC, NULL, totloop, surface->output_name);
1645                                                 /* apply color */
1646                                                 if (col) {
1647                                                         #pragma omp parallel for schedule(static)
1648                                                         for (i=0; i<totloop; i++) {
1649                                                                 int index = mloop[i].v*4;
1650                                                                 col[i].a = FTOCHAR(fcolor[index+3]);
1651                                                                 col[i].r = FTOCHAR(fcolor[index+2]);
1652                                                                 col[i].g = FTOCHAR(fcolor[index+1]);
1653                                                                 col[i].b = FTOCHAR(fcolor[index]);
1654                                                         }
1655                                                 }
1656                                                 
1657                                                 MEM_freeN(fcolor);
1658
1659                                                 /* wet layer */
1660                                                 col = CustomData_get_layer_named(&result->loopData, CD_MLOOPCOL, surface->output_name2);
1661                                                 /* if output layer is lost from a constructive modifier, re-add it */
1662                                                 if (!col && dynamicPaint_outputLayerExists(surface, ob, 1))
1663                                                         col = CustomData_add_layer_named(&result->loopData, CD_MLOOPCOL, CD_CALLOC, NULL, totloop, surface->output_name2);
1664                                                 /* apply color */
1665                                                 if (col) {
1666                                                         #pragma omp parallel for schedule(static)
1667                                                         for (i=0; i<totloop; i++) {
1668                                                                 int index = mloop[i].v;
1669                                                                 col[i].a = 255;
1670                                                                 col[i].r = FTOCHAR(pPoint[index].wetness);
1671                                                                 col[i].g = FTOCHAR(pPoint[index].wetness);
1672                                                                 col[i].b = FTOCHAR(pPoint[index].wetness);
1673                                                         }
1674                                                 }
1675                                         }
1676                                         /* vertex group paint */
1677                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
1678                                                 MLoop *mloop = CDDM_get_loops(result);
1679                                                 int totloop = result->numLoopData;
1680
1681                                                 int defgrp_index = defgroup_name_index(ob, surface->output_name);
1682                                                 MDeformVert *dvert = result->getVertDataArray(result, CD_MDEFORMVERT);
1683                                                 float *weight = (float*)sData->type_data;
1684
1685                                                 /* viewport preview */
1686                                                 if (0 && surface->flags & MOD_DPAINT_PREVIEW) {
1687                                                         /* Save preview results to weight layer to be
1688                                                         *   able to share same drawing methods */
1689                                                         int i;
1690                                                         MLoopCol *col = CustomData_get_layer(&dm->loopData, CD_WEIGHT_MLOOPCOL);
1691                                                         if (!col) col = CustomData_add_layer(&dm->loopData, CD_WEIGHT_MLOOPCOL, CD_CALLOC, NULL, totloop);
1692
1693                                                         if (col) {
1694                                                                 printf("doint weight preview\n");
1695                                                                 #pragma omp parallel for schedule(static)
1696                                                                 for (i=0; i<totloop; i++) {
1697                                                                         float temp_color[3];
1698                                                                         weight_to_rgb(temp_color, weight[mloop[i].v]);
1699
1700                                                                         col[i].a = 255;
1701                                                                         col[i].r = FTOCHAR(temp_color[2]);
1702                                                                         col[i].g = FTOCHAR(temp_color[1]);
1703                                                                         col[i].b = FTOCHAR(temp_color[0]);
1704                                                                 }
1705                                                                 pmd->canvas->flags |= MOD_DPAINT_PREVIEW_READY;
1706                                                         }
1707                                                 }
1708
1709                                                 /* apply weights into a vertex group, if doesnt exists add a new layer */
1710                                                 if (defgrp_index >= 0 && !dvert && (surface->output_name[0] != '\0'))
1711                                                         dvert = CustomData_add_layer_named(&result->vertData, CD_MDEFORMVERT, CD_CALLOC,
1712                                                                                                                                 NULL, sData->total_points, surface->output_name);
1713                                                 if (defgrp_index >= 0 && dvert) {
1714                                                         int i;
1715                                                         for(i=0; i<sData->total_points; i++) {
1716                                                                 MDeformVert *dv= &dvert[i];
1717                                                                 MDeformWeight *def_weight = defvert_find_index(dv, defgrp_index);
1718
1719                                                                 /* skip if weight value is 0 and no existing weight is found */
1720                                                                 if ((def_weight != NULL) || (weight[i] != 0.0f)) {
1721
1722                                                                         /* if not found, add a weight for it */
1723                                                                         if (def_weight == NULL) {
1724                                                                                 def_weight= defvert_verify_index(dv, defgrp_index);
1725                                                                         }
1726
1727                                                                         /* set weight value */
1728                                                                         def_weight->weight = weight[i];
1729                                                                 }
1730                                                         }
1731                                                 }
1732                                         }
1733                                         /* wave simulation */
1734                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
1735                                                 MVert *mvert = result->getVertArray(result);
1736                                                 int i;
1737                                                 PaintWavePoint* wPoint = (PaintWavePoint*)sData->type_data;
1738
1739                                                 #pragma omp parallel for schedule(static)
1740                                                 for (i=0; i<sData->total_points; i++) {
1741                                                         float normal[3];
1742                                                         normal_short_to_float_v3(normal, mvert[i].no);
1743                                                         madd_v3_v3fl(mvert[i].co, normal, wPoint[i].height);
1744                                                 }
1745                                                 CDDM_calc_normals(result);
1746                                         }
1747
1748                                         /* displace */
1749                                         dynamicPaint_applySurfaceDisplace(surface, result, 1);
1750                                 }
1751                         }
1752                 }
1753         }
1754         /* make a copy of dm to use as brush data */
1755         if (pmd->brush) {
1756                 if (pmd->brush->dm) pmd->brush->dm->release(pmd->brush->dm);
1757                 pmd->brush->dm = CDDM_copy(result, 0);
1758         }
1759
1760         return result;
1761 }
1762
1763 /* update cache frame range */
1764 void dynamicPaint_cacheUpdateFrames(DynamicPaintSurface *surface)
1765 {
1766         if (surface->pointcache) {
1767                 surface->pointcache->startframe = surface->start_frame;
1768                 surface->pointcache->endframe = surface->end_frame;
1769         }
1770 }
1771
1772 void canvas_copyDerivedMesh(DynamicPaintCanvasSettings *canvas, DerivedMesh *dm)
1773 {
1774         if (canvas->dm) canvas->dm->release(canvas->dm);
1775         canvas->dm = CDDM_copy(dm, 0);
1776 }
1777
1778 /*
1779 *       Updates derived mesh copy and processes dynamic paint step / caches.
1780 */
1781 static void dynamicPaint_frameUpdate(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1782 {
1783         if(pmd->canvas) {
1784                 DynamicPaintCanvasSettings *canvas = pmd->canvas;
1785                 DynamicPaintSurface *surface = canvas->surfaces.first;
1786
1787                 /* update derived mesh copy */
1788                 canvas_copyDerivedMesh(canvas, dm);
1789
1790                 /* in case image sequence baking, stop here */
1791                 if (canvas->flags & MOD_DPAINT_BAKING) return;
1792
1793                 /* loop through surfaces */
1794                 for (; surface; surface=surface->next) {
1795                         int current_frame = (int)scene->r.cfra;
1796
1797                         /* free bake data if not required anymore */
1798                         surface_freeUnusedData(surface);
1799
1800                         /* image sequences are handled by bake operator */
1801                         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) continue;
1802                         if (!(surface->flags & MOD_DPAINT_ACTIVE)) continue;
1803
1804                         /* make sure surface is valid */
1805                         if (!dynamicPaint_checkSurfaceData(surface)) continue;
1806
1807                         /* limit frame range */
1808                         CLAMP(current_frame, surface->start_frame, surface->end_frame);
1809
1810                         if (current_frame != surface->current_frame || (int)scene->r.cfra == surface->start_frame) {
1811                                 PointCache *cache = surface->pointcache;
1812                                 PTCacheID pid;
1813                                 surface->current_frame = current_frame;
1814
1815                                 /* read point cache */
1816                                 BKE_ptcache_id_from_dynamicpaint(&pid, ob, surface);
1817                                 pid.cache->startframe = surface->start_frame;
1818                                 pid.cache->endframe = surface->end_frame;
1819                                 BKE_ptcache_id_time(&pid, scene, (float)scene->r.cfra, NULL, NULL, NULL);
1820
1821                                 /* reset non-baked cache at first frame */
1822                                 if((int)scene->r.cfra == surface->start_frame && !(cache->flag & PTCACHE_BAKED))
1823                                 {
1824                                         cache->flag |= PTCACHE_REDO_NEEDED;
1825                                         BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
1826                                         cache->flag &= ~PTCACHE_REDO_NEEDED;
1827                                 }
1828
1829                                 /* try to read from cache */
1830                                 if(BKE_ptcache_read(&pid, (float)scene->r.cfra)) {
1831                                         BKE_ptcache_validate(cache, (int)scene->r.cfra);
1832                                 }
1833                                 /* if read failed and we're on surface range do recalculate */
1834                                 else if ((int)scene->r.cfra == current_frame
1835                                         && !(cache->flag & PTCACHE_BAKED)) {
1836                                         /* calculate surface frame */
1837                                         canvas->flags |= MOD_DPAINT_BAKING;
1838                                         dynamicPaint_calculateFrame(surface, scene, ob, current_frame);
1839                                         canvas->flags &= ~MOD_DPAINT_BAKING;
1840
1841                                         /* restore canvas derivedmesh if required */
1842                                         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE &&
1843                                                 surface->flags & MOD_DPAINT_DISP_INCREMENTAL && surface->next)
1844                                                 canvas_copyDerivedMesh(canvas, dm);
1845
1846                                         BKE_ptcache_validate(cache, surface->current_frame);
1847                                         BKE_ptcache_write(&pid, surface->current_frame);
1848                                 }
1849                         }
1850                 }
1851         }
1852 }
1853
1854 /* Modifier call. Processes dynamic paint modifier step. */
1855 struct DerivedMesh *dynamicPaint_Modifier_do(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1856 {       
1857         /* Update canvas data for a new frame */
1858         dynamicPaint_frameUpdate(pmd, scene, ob, dm);
1859
1860         /* Return output mesh */
1861         return dynamicPaint_Modifier_apply(pmd, ob, dm);
1862 }
1863
1864
1865 /***************************** Image Sequence / UV Image Surface Calls ******************************/
1866
1867 /*
1868 *       Tries to find the neighbouring pixel in given (uv space) direction.
1869 *       Result is used by effect system to move paint on the surface.
1870 *
1871 *   px,py : origin pixel x and y
1872 *       n_index : lookup direction index (use neighX,neighY to get final index)
1873 */
1874 static int dynamicPaint_findNeighbourPixel(PaintUVPoint *tempPoints, DerivedMesh *dm, char *uvname, int w, int h, int px, int py, int n_index)
1875 {
1876         /* Note: Current method only uses polygon edges to detect neighbouring pixels.
1877         *  -> It doesn't always lead to the optimum pixel but is accurate enough
1878         *  and faster/simplier than including possible face tip point links)
1879         */
1880
1881         int x,y;
1882         PaintUVPoint *tPoint = NULL;
1883         PaintUVPoint *cPoint = NULL;
1884
1885         /* shift position by given n_index */
1886         x = px + neighX[n_index];
1887         y = py + neighY[n_index];
1888
1889         if (x<0 || x>=w) return -1;
1890         if (y<0 || y>=h) return -1;
1891
1892         tPoint = &tempPoints[x+w*y];            /* UV neighbour */
1893         cPoint = &tempPoints[px+w*py];          /* Origin point */
1894
1895         /*
1896         *       Check if shifted point is on same face -> it's a correct neighbour
1897         *   (and if it isn't marked as an "edge pixel")
1898         */
1899         if ((tPoint->face_index == cPoint->face_index) && (tPoint->neighbour_pixel == -1))
1900                 return (x+w*y);
1901
1902         /*
1903         *       Even if shifted point is on another face
1904         *       -> use this point.
1905         *       
1906         *       !! Replace with "is uv faces linked" check !!
1907         *       This should work fine as long as uv island
1908         *       margin is > 1 pixel.
1909         */
1910         if ((tPoint->face_index != -1) && (tPoint->neighbour_pixel == -1)) {
1911                 return (x+w*y);
1912         }
1913
1914         /*
1915         *       If we get here, the actual neighbouring pixel
1916         *       is located on a non-linked uv face, and we have to find
1917         *       it's "real" position.
1918         *
1919         *       Simple neighbouring face finding algorithm:
1920         *       - find closest uv edge to shifted pixel and get
1921         *         the another face that shares that edge
1922         *       - find corresponding position of that new face edge
1923         *         in uv space
1924         *
1925         *       TODO: Implement something more accurate / optimized?
1926         */
1927         {
1928                 int numOfFaces = dm->getNumTessFaces(dm);
1929                 MFace *mface = dm->getTessFaceArray(dm);
1930                 MTFace *tface =  CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1931
1932                 /* Get closest edge to that subpixel on UV map  */
1933                 {
1934                         float pixel[2], dist, t_dist;
1935                         int i, uindex[3], edge1_index, edge2_index,
1936                                 e1_index, e2_index, target_face;
1937                         float closest_point[2], lambda, dir_vec[2];
1938                         int target_uv1, target_uv2, final_pixel[2], final_index;
1939
1940                         float *s_uv1, *s_uv2, *t_uv1, *t_uv2;
1941
1942                         pixel[0] = ((float)(px + neighX[n_index]) + 0.5f) / (float)w;
1943                         pixel[1] = ((float)(py + neighY[n_index]) + 0.5f) / (float)h;
1944
1945                         /* Get uv indexes for current face part */
1946                         if (cPoint->quad) {
1947                                 uindex[0] = 0; uindex[1] = 2; uindex[2] = 3;
1948                         }
1949                         else {
1950                                 uindex[0] = 0; uindex[1] = 1; uindex[2] = 2;
1951                         }
1952
1953                         /*
1954                         *       Find closest edge to that pixel
1955                         */
1956                         /* Dist to first edge   */
1957                         e1_index = cPoint->v1; e2_index = cPoint->v2; edge1_index = uindex[0]; edge2_index = uindex[1];
1958                         dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
1959
1960                         /* Dist to second edge  */
1961                         t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[1]], tface[cPoint->face_index].uv[uindex[2]]);
1962                         if (t_dist < dist) {e1_index = cPoint->v2; e2_index = cPoint->v3; edge1_index = uindex[1]; edge2_index = uindex[2]; dist = t_dist;}
1963
1964                         /* Dist to third edge   */
1965                         t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[2]], tface[cPoint->face_index].uv[uindex[0]]);
1966                         if (t_dist < dist) {e1_index = cPoint->v3; e2_index = cPoint->v1;  edge1_index = uindex[2]; edge2_index = uindex[0]; dist = t_dist;}
1967
1968
1969                         /*
1970                         *       Now find another face that is linked to that edge
1971                         */
1972                         target_face = -1;
1973
1974                         for (i=0; i<numOfFaces; i++) {
1975                                 /*
1976                                 *       Check if both edge vertices share this face
1977                                 */
1978                                 int v4 = (mface[i].v4) ? mface[i].v4 : -1;
1979
1980                                 if ((e1_index == mface[i].v1 || e1_index == mface[i].v2 || e1_index == mface[i].v3 || e1_index == v4) &&
1981                                         (e2_index == mface[i].v1 || e2_index == mface[i].v2 || e2_index == mface[i].v3 || e2_index == v4)) {
1982                                         if (i == cPoint->face_index) continue;
1983
1984                                         target_face = i;
1985
1986                                         /*
1987                                         *       Get edge UV index
1988                                         */
1989                                         if (e1_index == mface[i].v1) target_uv1 = 0;
1990                                         else if (e1_index == mface[i].v2) target_uv1 = 1;
1991                                         else if (e1_index == mface[i].v3) target_uv1 = 2;
1992                                         else target_uv1 = 3;
1993
1994                                         if (e2_index == mface[i].v1) target_uv2 = 0;
1995                                         else if (e2_index == mface[i].v2) target_uv2 = 1;
1996                                         else if (e2_index == mface[i].v3) target_uv2 = 2;
1997                                         else target_uv2 = 3;
1998
1999                                         break;
2000                                 }
2001                         }
2002
2003                         /* If none found return -1      */
2004                         if (target_face == -1) return -1;
2005
2006                         /*
2007                         *       If target face is connected in UV space as well, just use original index
2008                         */
2009                         s_uv1 = (float *)tface[cPoint->face_index].uv[edge1_index];
2010                         s_uv2 = (float *)tface[cPoint->face_index].uv[edge2_index];
2011                         t_uv1 = (float *)tface[target_face].uv[target_uv1];
2012                         t_uv2 = (float *)tface[target_face].uv[target_uv2];
2013
2014                         //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]);
2015
2016                         if (((s_uv1[0] == t_uv1[0] && s_uv1[1] == t_uv1[1]) &&
2017                                  (s_uv2[0] == t_uv2[0] && s_uv2[1] == t_uv2[1]) ) ||
2018                                 ((s_uv2[0] == t_uv1[0] && s_uv2[1] == t_uv1[1]) &&
2019                                  (s_uv1[0] == t_uv2[0] && s_uv1[1] == t_uv2[1]) )) return ((px+neighX[n_index]) + w*(py+neighY[n_index]));
2020
2021                         /*
2022                         *       Find a point that is relatively at same edge position
2023                         *       on this other face UV
2024                         */
2025                         lambda = closest_to_line_v2(closest_point, pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
2026                         if (lambda < 0.0f) lambda = 0.0f;
2027                         if (lambda > 1.0f) lambda = 1.0f;
2028
2029                         sub_v2_v2v2(dir_vec, tface[target_face].uv[target_uv2], tface[target_face].uv[target_uv1]);
2030
2031                         mul_v2_fl(dir_vec, lambda);
2032
2033                         copy_v2_v2(pixel, tface[target_face].uv[target_uv1]);
2034                         add_v2_v2(pixel, dir_vec);
2035                         pixel[0] = (pixel[0] * (float)w) - 0.5f;
2036                         pixel[1] = (pixel[1] * (float)h) - 0.5f;
2037
2038                         final_pixel[0] = (int)floor(pixel[0]);
2039                         final_pixel[1] = (int)floor(pixel[1]);
2040
2041                         /* If current pixel uv is outside of texture    */
2042                         if (final_pixel[0] < 0 || final_pixel[0] >= w) return -1;
2043                         if (final_pixel[1] < 0 || final_pixel[1] >= h) return -1;
2044
2045                         final_index = final_pixel[0] + w * final_pixel[1];
2046
2047                         /* If we ended up to our origin point ( mesh has smaller than pixel sized faces)        */
2048                         if (final_index == (px+w*py)) return -1;
2049                         /* If found pixel still lies on wrong face ( mesh has smaller than pixel sized faces)   */
2050                         if (tempPoints[final_index].face_index != target_face) return -1;
2051
2052                         /*
2053                         *       If final point is an "edge pixel", use it's "real" neighbour instead
2054                         */
2055                         if (tempPoints[final_index].neighbour_pixel != -1) final_index = cPoint->neighbour_pixel;
2056
2057                         return final_index;
2058                 }
2059         }
2060 }
2061
2062 /*
2063 *       Create a surface for uv image sequence format
2064 */
2065 int dynamicPaint_createUVSurface(DynamicPaintSurface *surface)
2066 {
2067         /* Antialias jitter point relative coords       */
2068         float jitter5sample[10] =  {0.0f, 0.0f,
2069                                                         -0.2f, -0.4f,
2070                                                         0.2f, 0.4f,
2071                                                         0.4f, -0.2f,
2072                                                         -0.4f, 0.3f};
2073         int ty;
2074         int w,h;
2075         int numOfFaces;
2076         char uvname[32];
2077         int active_points = 0;
2078         int error = 0;
2079
2080         PaintSurfaceData *sData;
2081         DynamicPaintCanvasSettings *canvas = surface->canvas;
2082         DerivedMesh *dm = canvas->dm;
2083
2084         PaintUVPoint *tempPoints = NULL;
2085         Vec3f *tempWeights = NULL;
2086         MFace *mface = NULL;
2087         MTFace *tface = NULL;
2088         Bounds2D *faceBB = NULL;
2089         int *final_index;
2090         int aa_samples;
2091
2092         if (!dm) return setError(canvas, "Canvas mesh not updated.");
2093         if (surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ) return setError(canvas, "Can't bake non-\"image sequence\" formats.");
2094
2095         numOfFaces = dm->getNumPolys(dm);
2096         mface = dm->getTessFaceArray(dm);
2097
2098         /* get uv map */
2099         CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->uvlayer_name, uvname);
2100         tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
2101
2102         /* Check for validity   */
2103         if (!tface) return setError(canvas, "No UV data on canvas.");
2104         if (surface->image_resolution < 16 || surface->image_resolution > 8192) return setError(canvas, "Invalid resolution.");
2105
2106         w = h = surface->image_resolution;
2107
2108         /*
2109         *       Start generating the surface
2110         */
2111         printf("DynamicPaint: Preparing UV surface of %ix%i pixels and %i faces.\n", w, h, numOfFaces);
2112
2113         /* Init data struct */
2114         if (surface->data) dynamicPaint_freeSurfaceData(surface);
2115         sData = surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
2116         if (!surface->data) return setError(canvas, "Not enough free memory.");
2117
2118         aa_samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
2119         tempPoints = (struct PaintUVPoint *) MEM_callocN(w*h*sizeof(struct PaintUVPoint), "Temp PaintUVPoint");
2120         if (!tempPoints) error=1;
2121
2122         final_index = (int *) MEM_callocN(w*h*sizeof(int), "Temp UV Final Indexes");
2123         if (!final_index) error=1;
2124
2125         tempWeights = (struct Vec3f *) MEM_mallocN(w*h*aa_samples*sizeof(struct Vec3f), "Temp bWeights");
2126         if (!tempWeights) error=1;
2127
2128         /*
2129         *       Generate a temporary bounding box array for UV faces to optimize
2130         *       the pixel-inside-a-face search.
2131         */
2132         if (!error) {
2133                 faceBB = (struct Bounds2D *) MEM_mallocN(numOfFaces*sizeof(struct Bounds2D), "MPCanvasFaceBB");
2134                 if (!faceBB) error=1;
2135         }
2136
2137         if (!error)
2138         for (ty=0; ty<numOfFaces; ty++) {
2139                 int numOfVert = (mface[ty].v4) ? 4 : 3;
2140                 int i;
2141
2142                 copy_v2_v2(faceBB[ty].min, tface[ty].uv[0]);
2143                 copy_v2_v2(faceBB[ty].max, tface[ty].uv[0]);
2144
2145                 for (i = 1; i<numOfVert; i++) {
2146                         if (tface[ty].uv[i][0] < faceBB[ty].min[0]) faceBB[ty].min[0] = tface[ty].uv[i][0];
2147                         if (tface[ty].uv[i][1] < faceBB[ty].min[1]) faceBB[ty].min[1] = tface[ty].uv[i][1];
2148                         if (tface[ty].uv[i][0] > faceBB[ty].max[0]) faceBB[ty].max[0] = tface[ty].uv[i][0];
2149                         if (tface[ty].uv[i][1] > faceBB[ty].max[1]) faceBB[ty].max[1] = tface[ty].uv[i][1];
2150
2151                 }
2152         }
2153
2154         /*
2155         *       Loop through every pixel and check
2156         *       if pixel is uv-mapped on a canvas face.
2157         */
2158         if (!error) {
2159                 #pragma omp parallel for schedule(static)
2160                 for (ty = 0; ty < h; ty++)
2161                 {
2162                         int tx;
2163                         for (tx = 0; tx < w; tx++)
2164                         {
2165                                 int i, sample;
2166                                 int index = tx+w*ty;
2167                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2168
2169                                 short isInside = 0;     /* if point is inside a uv face */
2170
2171                                 float d1[2], d2[2], d3[2], point[5][2];
2172                                 float dot00,dot01,dot02,dot11,dot12, invDenom, u,v;
2173
2174                                 /* Init per pixel settings */
2175                                 tPoint->face_index = -1;
2176                                 tPoint->neighbour_pixel = -1;
2177                                 tPoint->pixel_index = index;
2178
2179                                 /* Actual pixel center, used when collision is found    */
2180                                 point[0][0] = ((float)tx + 0.5f) / w;
2181                                 point[0][1] = ((float)ty + 0.5f) / h;
2182
2183                                 /*
2184                                 * A pixel middle sample isn't enough to find very narrow polygons
2185                                 * So using 4 samples of each corner too
2186                                 */
2187                                 point[1][0] = ((float)tx) / w;
2188                                 point[1][1] = ((float)ty) / h;
2189
2190                                 point[2][0] = ((float)tx+1) / w;
2191                                 point[2][1] = ((float)ty) / h;
2192
2193                                 point[3][0] = ((float)tx) / w;
2194                                 point[3][1] = ((float)ty+1) / h;
2195
2196                                 point[4][0] = ((float)tx+1) / w;
2197                                 point[4][1] = ((float)ty+1) / h;
2198
2199
2200                                 /* Loop through samples, starting from middle point     */
2201                                 for (sample=0; sample<5; sample++) {
2202                                         
2203                                         /* Loop through every face in the mesh  */
2204                                         for (i=0; i<numOfFaces; i++) {
2205
2206                                                 /* Check uv bb  */
2207                                                 if (faceBB[i].min[0] > (point[sample][0])) continue;
2208                                                 if (faceBB[i].min[1] > (point[sample][1])) continue;
2209                                                 if (faceBB[i].max[0] < (point[sample][0])) continue;
2210                                                 if (faceBB[i].max[1] < (point[sample][1])) continue;
2211
2212                                                 /*  Calculate point inside a triangle check
2213                                                 *       for uv0,1,2 */
2214                                                 sub_v2_v2v2(d1,  tface[i].uv[2], tface[i].uv[0]);       // uv2 - uv0
2215                                                 sub_v2_v2v2(d2,  tface[i].uv[1], tface[i].uv[0]);       // uv1 - uv0
2216                                                 sub_v2_v2v2(d3,  point[sample], tface[i].uv[0]);        // point - uv0
2217
2218                                                 dot00 = d1[0]*d1[0] + d1[1]*d1[1];
2219                                                 dot01 = d1[0]*d2[0] + d1[1]*d2[1];
2220                                                 dot02 = d1[0]*d3[0] + d1[1]*d3[1];
2221                                                 dot11 = d2[0]*d2[0] + d2[1]*d2[1];
2222                                                 dot12 = d2[0]*d3[0] + d2[1]*d3[1];
2223
2224                                                 invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
2225                                                 u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2226                                                 v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2227
2228                                                 if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=1;} /* is inside a triangle */
2229
2230                                                 /*  If collision wasn't found but the face is a quad
2231                                                 *       do another check for the second half */
2232                                                 if ((!isInside) && mface[i].v4)
2233                                                 {
2234
2235                                                         /* change d2 to test the other half     */
2236                                                         sub_v2_v2v2(d2,  tface[i].uv[3], tface[i].uv[0]);       // uv3 - uv0
2237
2238                                                         /* test again   */
2239                                                         dot00 = d1[0]*d1[0] + d1[1]*d1[1];
2240                                                         dot01 = d1[0]*d2[0] + d1[1]*d2[1];
2241                                                         dot02 = d1[0]*d3[0] + d1[1]*d3[1];
2242                                                         dot11 = d2[0]*d2[0] + d2[1]*d2[1];
2243                                                         dot12 = d2[0]*d3[0] + d2[1]*d3[1];
2244
2245                                                         invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
2246                                                         u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2247                                                         v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2248
2249                                                         if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=2;} /* is inside the second half of the quad */
2250
2251                                                 }
2252
2253                                                 /*
2254                                                 *       If point was inside the face
2255                                                 */
2256                                                 if (isInside != 0) {
2257
2258                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2259                                                         int j;
2260
2261                                                         /* Get triagnle uvs     */
2262                                                         if (isInside==1) {
2263                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2264                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2265                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2266                                                         }
2267                                                         else {
2268                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2269                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2270                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2271                                                         }
2272
2273                                                         /* Add b-weights per anti-aliasing sample       */
2274                                                         for (j=0; j<aa_samples; j++) {
2275                                                                 uv[0] = point[0][0] + jitter5sample[j*2] / w;
2276                                                                 uv[1] = point[0][1] + jitter5sample[j*2+1] / h;
2277
2278                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v);
2279                                                         }
2280
2281                                                         /* Set surface point face values        */
2282                                                         tPoint->face_index = i;                                                 /* face index */
2283                                                         tPoint->quad = (isInside == 2) ? 1 : 0;         /* quad or tri part*/
2284
2285                                                         /* save vertex indexes  */
2286                                                         tPoint->v1 = mface[i].v1;
2287                                                         tPoint->v2 = (isInside == 2) ? mface[i].v3 : mface[i].v2;
2288                                                         tPoint->v3 = (isInside == 2) ? mface[i].v4 : mface[i].v3;
2289
2290                                                         sample = 5;     /* make sure we exit sample loop as well */
2291                                                         break;
2292                                                 }
2293                                         }
2294                                 } /* sample loop */
2295                         }
2296                 }
2297
2298                 /*
2299                 *       Now loop through every pixel that was left without index
2300                 *       and find if they have neighbouring pixels that have an index.
2301                 *       If so use that polygon as pixel surface.
2302                 *       (To avoid seams on uv island edges)
2303                 */
2304                 #pragma omp parallel for schedule(static)
2305                 for (ty = 0; ty < h; ty++)
2306                 {
2307                         int tx;
2308                         for (tx = 0; tx < w; tx++)
2309                         {
2310                                 int index = tx+w*ty;
2311                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2312
2313                                 /* If point isnt't on canvas mesh       */
2314                                 if (tPoint->face_index == -1) {
2315                                         int u_min, u_max, v_min, v_max;
2316                                         int u,v, ind;
2317                                         float point[2];
2318
2319                                         /* get loop area        */
2320                                         u_min = (tx > 0) ? -1 : 0;
2321                                         u_max = (tx < (w-1)) ? 1 : 0;
2322                                         v_min = (ty > 0) ? -1 : 0;
2323                                         v_max = (ty < (h-1)) ? 1 : 0;
2324
2325                                         point[0] = ((float)tx + 0.5f) / w;
2326                                         point[1] = ((float)ty + 0.5f) / h;
2327
2328                                         /* search through defined area for neighbour    */
2329                                         for (u=u_min; u<=u_max; u++)
2330                                                 for (v=v_min; v<=v_max; v++) {
2331                                                         /* if not this pixel itself     */
2332                                                         if (u!=0 || v!=0) {
2333                                                                 ind = (tx+u)+w*(ty+v);
2334
2335                                                                 /* if neighbour has index       */
2336                                                                 if (tempPoints[ind].face_index != -1) {
2337
2338                                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2339                                                                         int i = tempPoints[ind].face_index, j;
2340
2341                                                                         /* Now calculate pixel data for this pixel as it was on polygon surface */
2342                                                                         if (!tempPoints[ind].quad) {
2343                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2344                                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2345                                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2346                                                                         }
2347                                                                         else {
2348                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2349                                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2350                                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2351                                                                         }
2352
2353                                                                         /* Add b-weights per anti-aliasing sample       */
2354                                                                         for (j=0; j<aa_samples; j++) {
2355
2356                                                                                 uv[0] = point[0] + jitter5sample[j*2] / w;
2357                                                                                 uv[1] = point[1] + jitter5sample[j*2+1] / h;
2358                                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v);
2359                                                                         }
2360
2361                                                                         /* Set values   */
2362                                                                         tPoint->neighbour_pixel = ind;                          // face index
2363                                                                         tPoint->quad = tempPoints[ind].quad;            // quad or tri
2364
2365                                                                         /* save vertex indexes  */
2366                                                                         tPoint->v1 = mface[i].v1;
2367                                                                         tPoint->v2 = (tPoint->quad) ? mface[i].v3 : mface[i].v2;
2368                                                                         tPoint->v3 = (tPoint->quad) ? mface[i].v4 : mface[i].v3;
2369
2370                                                                         u = u_max + 1;  /* make sure we exit outer loop as well */
2371                                                                         break;
2372                                                                 }
2373                                                 }
2374                                         }
2375                                 }
2376                         }
2377                 }
2378
2379                 /*
2380                 *       When base loop is over convert found neighbour indexes to real ones
2381                 *       Also count the final number of active surface points
2382                 */
2383                 for (ty = 0; ty < h; ty++)
2384                 {
2385                         int tx;
2386                         for (tx = 0; tx < w; tx++)
2387                         {
2388                                 int index = tx+w*ty;
2389                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2390
2391                                 if (tPoint->face_index == -1 && tPoint->neighbour_pixel != -1) tPoint->face_index = tempPoints[tPoint->neighbour_pixel].face_index;
2392                                 if (tPoint->face_index != -1) active_points++;
2393                         }
2394                 }
2395
2396                 /*      Generate surface adjacency data. */
2397                 {
2398                         int i, cursor=0;
2399
2400                         /* Create a temporary array of final indexes (before unassigned
2401                         *  pixels have been dropped) */
2402                         for (i=0; i<w*h; i++) {
2403                                 if (tempPoints[i].face_index != -1) {
2404                                         final_index[i] = cursor;
2405                                         cursor++;
2406                                 }
2407                         }
2408                         /* allocate memory */
2409                         sData->total_points = w*h;
2410                         dynamicPaint_initAdjacencyData(surface, 1);
2411
2412                         if (sData->adj_data) {
2413                                 PaintAdjData *ed = sData->adj_data;
2414                                 unsigned int n_pos = 0;
2415                                 for (ty = 0; ty < h; ty++)
2416                                 {
2417                                         int tx;
2418                                         for (tx = 0; tx < w; tx++)
2419                                         {
2420                                                 int i, index = tx+w*ty;
2421
2422                                                 if (tempPoints[index].face_index != -1) {
2423                                                         ed->n_index[final_index[index]] = n_pos;
2424                                                         ed->n_num[final_index[index]] = 0;
2425
2426                                                         for (i=0; i<8; i++) {
2427
2428                                                                 /* Try to find a neighbouring pixel in defined direction
2429                                                                 *  If not found, -1 is returned */
2430                                                                 int n_target = dynamicPaint_findNeighbourPixel(tempPoints, dm, uvname, w, h, tx, ty, i);
2431
2432                                                                 if (n_target != -1) {
2433                                                                         ed->n_target[n_pos] = final_index[n_target];
2434                                                                         ed->n_num[final_index[index]]++;
2435                                                                         n_pos++;
2436                                                                 }
2437                                                         }
2438                                                 }
2439                                         }
2440                                 }
2441                         }
2442                 }
2443
2444                 /* Create final surface data without inactive points */
2445                 {
2446                         ImgSeqFormatData *f_data = MEM_callocN(sizeof(struct ImgSeqFormatData), "ImgSeqFormatData");
2447                         if (f_data) {
2448                                 f_data->uv_p = MEM_callocN(active_points*sizeof(struct PaintUVPoint), "PaintUVPoint");
2449                                 f_data->barycentricWeights = MEM_callocN(active_points*aa_samples*sizeof(struct Vec3f), "PaintUVPoint");
2450
2451                                 if (!f_data->uv_p || !f_data->barycentricWeights) error=1;
2452                         }
2453                         else error=1;
2454
2455                         sData->total_points = active_points;
2456                         
2457                         /* in case of allocation error, free everything */
2458                         if (error) {
2459                                 if (f_data) {
2460                                         if (f_data->uv_p) MEM_freeN(f_data->uv_p);
2461                                         if (f_data->barycentricWeights) MEM_freeN(f_data->barycentricWeights);
2462                                         MEM_freeN(f_data);
2463                                 }
2464                         }
2465                         else {
2466                                 int index, cursor = 0;
2467                                 sData->total_points = active_points;
2468                                 sData->format_data = f_data;
2469
2470                                 for(index = 0; index < (w*h); index++) {
2471                                         if (tempPoints[index].face_index != -1) {
2472                                                 memcpy(&f_data->uv_p[cursor], &tempPoints[index], sizeof(PaintUVPoint));
2473                                                 memcpy(&f_data->barycentricWeights[cursor*aa_samples], &tempWeights[index*aa_samples], sizeof(Vec3f)*aa_samples);
2474                                                 cursor++;
2475                                         }
2476                                 }
2477                         }
2478                 }
2479         }
2480         if (error==1) setError(canvas, "Not enough free memory.");
2481
2482         if (faceBB) MEM_freeN(faceBB);
2483         if (tempPoints) MEM_freeN(tempPoints);
2484         if (tempWeights) MEM_freeN(tempWeights);
2485         if (final_index) MEM_freeN(final_index);
2486
2487         /* Init surface type data */
2488         if (!error) {
2489                 dynamicPaint_allocateSurfaceType(surface);
2490
2491 #if 0
2492                 /*  -----------------------------------------------------------------
2493                 *       For debug, output pixel statuses to the color map
2494                 *       -----------------------------------------------------------------*/
2495                 #pragma omp parallel for schedule(static)
2496                 for (index = 0; index < sData->total_points; index++)
2497                 {
2498                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
2499                         PaintUVPoint *uvPoint = &((PaintUVPoint*)f_data->uv_p)[index];
2500                         PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index];
2501                         pPoint->alpha=1.0f;
2502
2503                         /* Every pixel that is assigned as "edge pixel" gets blue color */
2504                         if (uvPoint->neighbour_pixel != -1) pPoint->color[2] = 1.0f;
2505                         /* and every pixel that finally got an polygon gets red color   */
2506                         if (uvPoint->face_index != -1) pPoint->color[0] = 1.0f;
2507                         /* green color shows pixel face index hash      */
2508                         if (uvPoint->face_index != -1) pPoint->color[1] = (float)(uvPoint->face_index % 255)/256.0f;
2509                 }
2510
2511 #endif
2512                 dynamicPaint_setInitialColor(surface);
2513         }
2514
2515         return (error == 0);
2516 }
2517
2518 /*
2519 *       Outputs an image file from uv surface data.
2520 */
2521 void dynamicPaint_outputSurfaceImage(DynamicPaintSurface *surface, char* filename, short output_layer)
2522 {
2523         int index;
2524         ImBuf* ibuf = NULL;
2525         PaintSurfaceData *sData = surface->data;
2526         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
2527         /* OpenEXR or PNG       */
2528         int format = (surface->image_fileformat & MOD_DPAINT_IMGFORMAT_OPENEXR) ? R_IMF_IMTYPE_OPENEXR : R_IMF_IMTYPE_PNG;
2529         char output_file[FILE_MAX];
2530
2531         if (!sData || !sData->type_data) {setError(surface->canvas, "Image save failed: Invalid surface.");return;}
2532         /* if selected format is openexr, but current build doesnt support one */
2533         #ifndef WITH_OPENEXR
2534         if (format == R_IMF_IMTYPE_OPENEXR) format = R_IMF_IMTYPE_PNG;
2535         #endif
2536         BLI_strncpy(output_file, filename, sizeof(output_file));
2537         BKE_add_image_extension(output_file, format);
2538
2539         /* Validate output file path    */
2540         BLI_path_abs(output_file, G.main->name);
2541         BLI_make_existing_file(output_file);
2542
2543         /* Init image buffer    */
2544         ibuf = IMB_allocImBuf(surface->image_resolution, surface->image_resolution, 32, IB_rectfloat);
2545         if (ibuf == NULL) {setError(surface->canvas, "Image save failed: Not enough free memory.");return;}
2546
2547         #pragma omp parallel for schedule(static)
2548         for (index = 0; index < sData->total_points; index++)
2549         {
2550                 int pos=f_data->uv_p[index].pixel_index*4;      /* image buffer position */
2551
2552                 /* Set values of preferred type */
2553                 if (output_layer == 1) {
2554                         /* wetmap */
2555                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2556                                 PaintPoint *point = &((PaintPoint*)sData->type_data)[index];
2557                                 float value = (point->wetness > 1.0f) ? 1.0f : point->wetness;
2558
2559                                 ibuf->rect_float[pos]=value;
2560                                 ibuf->rect_float[pos+1]=value;
2561                                 ibuf->rect_float[pos+2]=value;
2562                                 ibuf->rect_float[pos+3]=1.0f;
2563                         }
2564                 }
2565                 else if (output_layer == 0) {
2566                         /* Paintmap */
2567                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2568                                 PaintPoint *point = &((PaintPoint*)sData->type_data)[index];
2569
2570                                 ibuf->rect_float[pos]   = point->color[0];
2571                                 ibuf->rect_float[pos+1] = point->color[1];
2572                                 ibuf->rect_float[pos+2] = point->color[2];
2573                                 /* mix wet layer */
2574                                 if (point->e_alpha) mixColors(&ibuf->rect_float[pos], point->alpha, point->e_color, point->e_alpha);
2575
2576                                 /* use highest alpha    */
2577                                 ibuf->rect_float[pos+3] = (point->e_alpha > point->alpha) ? point->e_alpha : point->alpha;
2578
2579                                 /* Multiply color by alpha if enabled   */
2580                                 if (surface->flags & MOD_DPAINT_MULALPHA) {
2581                                         ibuf->rect_float[pos]   *= ibuf->rect_float[pos+3];
2582                                         ibuf->rect_float[pos+1] *= ibuf->rect_float[pos+3];
2583                                         ibuf->rect_float[pos+2] *= ibuf->rect_float[pos+3];
2584                                 }
2585                         }
2586                         /* displace */
2587                         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
2588                                 float depth = ((float*)sData->type_data)[index];
2589                                 if (surface->depth_clamp)
2590                                         depth /= surface->depth_clamp;
2591
2592                                 if (surface->disp_type == MOD_DPAINT_DISP_DISPLACE) {
2593                                         depth = (0.5f - depth/2.0f);
2594                                 }
2595
2596                                 CLAMP(depth, 0.0f, 1.0f);
2597
2598                                 ibuf->rect_float[pos]=depth;
2599                                 ibuf->rect_float[pos+1]=depth;
2600                                 ibuf->rect_float[pos+2]=depth;
2601                                 ibuf->rect_float[pos+3]=1.0f;
2602                         }
2603                         /* waves */
2604                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
2605                                 PaintWavePoint *wPoint = &((PaintWavePoint*)sData->type_data)[index];
2606                                 float depth = wPoint->height;
2607                                 if (surface->depth_clamp)
2608                                                 depth /= surface->depth_clamp;
2609                                 depth = (0.5f + depth/2.0f);
2610                                 CLAMP(depth, 0.0f, 1.0f);
2611
2612                                 ibuf->rect_float[pos]=depth;
2613                                 ibuf->rect_float[pos+1]=depth;
2614                                 ibuf->rect_float[pos+2]=depth;
2615                                 ibuf->rect_float[pos+3]=1.0f;
2616                         }
2617                 }
2618         }
2619
2620         /* Set output format, png in case exr isnt supported */
2621         ibuf->ftype= PNG|95;
2622 #ifdef WITH_OPENEXR
2623         if (format == R_IMF_IMTYPE_OPENEXR) {   /* OpenEXR 32-bit float */
2624                 ibuf->ftype = OPENEXR | OPENEXR_COMPRESS;
2625         }
2626 #endif
2627
2628         /* Save image */
2629         IMB_saveiff(ibuf, output_file, IB_rectfloat);
2630         IMB_freeImBuf(ibuf);
2631 }
2632
2633
2634 /***************************** Material / Texture Sampling ******************************/
2635
2636 /* stores a copy of required materials to allow doing adjustments
2637 *  without interfering the render/preview */
2638 typedef struct BrushMaterials {
2639         Material *mat;
2640         Material **ob_mats;
2641         int tot;
2642 } BrushMaterials;
2643
2644 /* Initialize materials for brush object:
2645 *  Calculates inverse matrices for linked objects, updates
2646 *  volume caches etc. */
2647 static void dynamicPaint_updateBrushMaterials(Object *brushOb, Material *ui_mat, Scene *scene, BrushMaterials *bMats)
2648 {
2649         /* Calculate inverse transformation matrix
2650         *  for this object */
2651         invert_m4_m4(brushOb->imat, brushOb->obmat);
2652         copy_m4_m4(brushOb->imat_ren, brushOb->imat);
2653
2654         /* Now process every material linked to this brush object */
2655         if ((ui_mat == NULL) && brushOb->mat && brushOb->totcol) {
2656                 int i, tot=(*give_totcolp(brushOb));
2657
2658                 /* allocate material pointer array */
2659                 if (tot) {
2660                         bMats->ob_mats = MEM_callocN(sizeof(Material*)*(tot), "BrushMaterials");
2661                         for (i=0; i<tot; i++) {
2662                                 bMats->ob_mats[i] = RE_init_sample_material(give_current_material(brushOb,(i+1)), scene);
2663                         }
2664                 }
2665                 bMats->tot = tot;
2666         }
2667         else {
2668                 bMats->mat = RE_init_sample_material(ui_mat, scene);
2669         }
2670 }
2671
2672 /* free all data allocated by dynamicPaint_updateBrushMaterials() */
2673 static void dynamicPaint_freeBrushMaterials(BrushMaterials *bMats)
2674 {
2675         /* Now process every material linked to this brush object */
2676         if (bMats->ob_mats) {
2677                 int i;
2678                 for (i=0; i<bMats->tot; i++) {
2679                         RE_free_sample_material(bMats->ob_mats[i]);
2680                 }
2681                 MEM_freeN(bMats->ob_mats);
2682         }
2683         else if (bMats->mat) {
2684                 RE_free_sample_material(bMats->mat);
2685         }
2686 }
2687
2688 /*
2689 *       Get material diffuse color and alpha (including linked textures) in given coordinates
2690 */
2691 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)
2692 {
2693         Material *mat = bMats->mat;
2694         MFace *mface = orcoDm->getTessFaceArray(orcoDm);
2695
2696         /* If no material defined, use the one assigned to the mesh face */
2697         if (mat == NULL) {
2698                 if (bMats->ob_mats) {
2699                         int mat_nr = mface[faceIndex].mat_nr;
2700                         if (mat_nr >= (*give_totcolp(brushOb))) return;
2701                         mat = bMats->ob_mats[mat_nr];
2702                         if (mat == NULL) return;        /* No material assigned */
2703                 }
2704                 else return;
2705         }
2706
2707         RE_sample_material_color(mat, color, alpha, volume_co, surface_co, faceIndex, isQuad, orcoDm, brushOb);
2708 }
2709
2710
2711 /***************************** Ray / Nearest Point Utils ******************************/
2712
2713
2714 /*  A modified callback to bvh tree raycast. The tree must bust have been built using bvhtree_from_mesh_faces.
2715 *   userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree.
2716 *  
2717 *       To optimize brush detection speed this doesn't calculate hit coordinates or normal.
2718 *       If ray hit the second half of a quad, no[0] is set to 1.0f.
2719 */
2720 static void mesh_faces_spherecast_dp(void *userdata, int index, const BVHTreeRay *ray, BVHTreeRayHit *hit)
2721 {
2722         const BVHTreeFromMesh *data = (BVHTreeFromMesh*) userdata;
2723         MVert *vert     = data->vert;
2724         MFace *face = data->face + index;
2725         short quad = 0;
2726
2727         float *t0, *t1, *t2, *t3;
2728         t0 = vert[ face->v1 ].co;
2729         t1 = vert[ face->v2 ].co;
2730         t2 = vert[ face->v3 ].co;
2731         t3 = face->v4 ? vert[ face->v4].co : NULL;
2732
2733         do
2734         {       
2735                 float dist = bvhtree_ray_tri_intersection(ray, hit->dist, t0, t1, t2);
2736
2737                 if(dist >= 0 && dist < hit->dist)
2738                 {
2739                         hit->index = index;
2740                         hit->dist = dist;
2741                         hit->no[0] = (quad) ? 1.0f : 0.0f;
2742                 }
2743
2744                 t1 = t2;
2745                 t2 = t3;
2746                 t3 = NULL;
2747                 quad = 1;
2748
2749         } while(t2);
2750 }
2751
2752 /* A modified callback to bvh tree nearest point. The tree must bust have been built using bvhtree_from_mesh_faces.
2753 *  userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree.
2754 *  
2755 *       To optimize brush detection speed this doesn't calculate hit normal.
2756 *       If ray hit the second half of a quad, no[0] is set to 1.0f, else 0.0f
2757 */
2758 static void mesh_faces_nearest_point_dp(void *userdata, int index, const float *co, BVHTreeNearest *nearest)
2759 {
2760         const BVHTreeFromMesh *data = (BVHTreeFromMesh*) userdata;
2761         MVert *vert     = data->vert;
2762         MFace *face = data->face + index;
2763         short quad = 0;
2764
2765         float *t0, *t1, *t2, *t3;
2766         t0 = vert[ face->v1 ].co;
2767         t1 = vert[ face->v2 ].co;
2768         t2 = vert[ face->v3 ].co;
2769         t3 = face->v4 ? vert[ face->v4].co : NULL;
2770
2771         do
2772         {       
2773                 float nearest_tmp[3], dist;
2774                 int vertex, edge;
2775                 
2776                 dist = nearest_point_in_tri_surface(t0, t1, t2, co, &vertex, &edge, nearest_tmp);
2777                 if(dist < nearest->dist)
2778                 {
2779                         nearest->index = index;
2780                         nearest->dist = dist;
2781                         copy_v3_v3(nearest->co, nearest_tmp);
2782                         nearest->no[0] = (quad) ? 1.0f : 0.0f;
2783                 }
2784
2785                 t1 = t2;
2786                 t2 = t3;
2787                 t3 = NULL;
2788                 quad = 1;
2789
2790         } while(t2);