style cleanup / comment formatting for bli/bke/bmesh
[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 neighboring 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 /* dynamicPaint_findNeighbourPixel() return codes */
101 #define NOT_FOUND -1
102 #define ON_MESH_EDGE -2
103 #define OUT_OF_TEXTURE -3
104 /* paint effect default movement per frame in global units */
105 #define EFF_MOVEMENT_PER_FRAME 0.05f
106 /* initial wave time factor */
107 #define WAVE_TIME_FAC (1.0f/24.f)
108 #define CANVAS_REL_SIZE 5.0f
109 /* drying limits */
110 #define MIN_WETNESS 0.001f
111 #define MAX_WETNESS 5.0f
112 /* dissolve macro */
113 #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)
114
115 /***************************** Internal Structs ***************************/
116
117 typedef struct Bounds2D {
118         float min[2], max[2];
119 } Bounds2D;
120
121 typedef struct Bounds3D {
122         int valid;
123         float min[3], max[3];
124 } Bounds3D;
125
126 typedef struct VolumeGrid {
127         int dim[3];
128         Bounds3D grid_bounds; /* whole grid bounds */
129
130         Bounds3D *bounds;       /* (x*y*z) precalculated grid cell bounds */
131         int *s_pos; /* (x*y*z) t_index begin id */
132         int *s_num; /* (x*y*z) number of t_index points */
133         int *t_index; /* actual surface point index,
134                                                    access: (s_pos+s_num) */
135 } VolumeGrid;
136
137 typedef struct Vec3f {
138         float v[3];
139 } Vec3f;
140
141 typedef struct BakeAdjPoint {
142         float dir[3];   /* vector pointing towards this neighbor */
143         float dist;             /* distance to */
144 } BakeAdjPoint;
145
146 /* Surface data used while processing a frame   */
147 typedef struct PaintBakeNormal {
148         float invNorm[3];  /* current pixel world-space inverted normal */
149         float normal_scale; /* normal directional scale for displace mapping */
150 } PaintBakeNormal;
151
152 /* Temp surface data used to process a frame */
153 typedef struct PaintBakeData {
154         /* point space data */
155         PaintBakeNormal *bNormal;
156         int *s_pos;     /* index to start reading point sample realCoord */
157         int *s_num;     /* num of realCoord samples */
158         Vec3f *realCoord;  /* current pixel center world-space coordinates for each sample
159                                            *  ordered as (s_pos+s_num)*/
160         Bounds3D mesh_bounds;
161
162         /* adjacency info */
163         BakeAdjPoint *bNeighs; /* current global neighbor distances and directions, if required */
164         double average_dist;
165         /* space partitioning */
166         VolumeGrid *grid;               /* space partitioning grid to optimize brush checks */
167
168         /* velocity and movement */
169         Vec3f *velocity;                /* speed vector in global space movement per frame, if required */
170         Vec3f *prev_velocity;
171         float *brush_velocity;  /* special temp data for post-p velocity based brushes like smudge
172                                                         *  3 float dir vec + 1 float str */
173         MVert *prev_verts;              /* copy of previous frame vertices. used to observe surface movement */
174         float prev_obmat[4][4]; /* previous frame object matrix */
175         int clear;                              /* flag to check if surface was cleared/reset -> have to redo velocity etc. */
176
177 } PaintBakeData;
178
179 /* UV Image sequence format point       */
180 typedef struct PaintUVPoint {
181         /* Pixel / mesh data */
182         unsigned int face_index, pixel_index;   /* face index on domain derived mesh */
183         unsigned int v1, v2, v3;                                /* vertex indexes */
184
185         unsigned int neighbour_pixel;   /* If this pixel isn't uv mapped to any face,
186                                                                            but it's neighboring pixel is */
187         short quad;
188 } PaintUVPoint;
189
190 typedef struct ImgSeqFormatData {
191         PaintUVPoint *uv_p;
192         Vec3f *barycentricWeights;              /* b-weights for all pixel samples */
193 } ImgSeqFormatData;
194
195 /* adjacency data flags */
196 #define ADJ_ON_MESH_EDGE (1<<0)
197
198 typedef struct PaintAdjData {
199         int *n_target;          /* array of neighboring point indexes,
200                                                                for single sample use (n_index+neigh_num) */
201         int *n_index;           /* index to start reading n_target for each point */
202         int *n_num;             /* num of neighs for each point */
203         int *flags;             /* vertex adjacency flags */
204         int total_targets; /* size of n_target */
205 } PaintAdjData;
206
207 /***************************** General Utils ******************************/
208
209 /* Set canvas error string to display at the bake report */
210 static int setError(DynamicPaintCanvasSettings *canvas, const char *string)
211 {
212         /* Add error to canvas ui info label */
213         BLI_strncpy(canvas->error, string, sizeof(canvas->error));
214         return 0;
215 }
216
217 /* Get number of surface points for cached types */
218 static int dynamicPaint_surfaceNumOfPoints(DynamicPaintSurface *surface)
219 {
220         if (surface->format == MOD_DPAINT_SURFACE_F_PTEX) {
221                 return 0; /* not supported atm */
222         }
223         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
224                 if (!surface->canvas->dm) return 0; /* invalid derived mesh */
225                 return surface->canvas->dm->getNumVerts(surface->canvas->dm);
226         }
227         else
228                 return 0;
229 }
230
231 /* checks whether surface's format/type has realtime preview */
232 int dynamicPaint_surfaceHasColorPreview(DynamicPaintSurface *surface)
233 {
234         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 0;
235         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
236                 if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE ||
237                         surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 0;
238                 else return 1;
239         }
240         else return 1;
241 }
242
243 /* get currently active surface (in user interface) */
244 struct DynamicPaintSurface *get_activeSurface(DynamicPaintCanvasSettings *canvas)
245 {
246         DynamicPaintSurface *surface = canvas->surfaces.first;
247         int i;
248
249         for(i=0; surface; surface=surface->next) {
250                 if(i == canvas->active_sur)
251                         return surface;
252                 i++;
253         }
254         return NULL;
255 }
256
257 /* set preview to first previewable surface */
258 void dynamicPaint_resetPreview(DynamicPaintCanvasSettings *canvas)
259 {
260         DynamicPaintSurface *surface = canvas->surfaces.first;
261         int done=0;
262
263         for(; surface; surface=surface->next) {
264                 if (!done && dynamicPaint_surfaceHasColorPreview(surface)) {
265                         surface->flags |= MOD_DPAINT_PREVIEW;
266                         done=1;
267                 }
268                 else
269                         surface->flags &= ~MOD_DPAINT_PREVIEW;
270         }
271 }
272
273 /* set preview to defined surface */
274 static void dynamicPaint_setPreview(DynamicPaintSurface *t_surface)
275 {
276         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
277         for(; surface; surface=surface->next) {
278                 if (surface == t_surface)
279                         surface->flags |= MOD_DPAINT_PREVIEW;
280                 else
281                         surface->flags &= ~MOD_DPAINT_PREVIEW;
282         }
283 }
284
285 int dynamicPaint_outputLayerExists(struct DynamicPaintSurface *surface, Object *ob, int output)
286 {
287         char *name;
288
289         if (output == 0)
290                 name = surface->output_name;
291         else if (output == 1)
292                 name = surface->output_name2;
293         else
294                 return 0;
295
296         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
297                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
298                         Mesh *me = ob->data;
299                         return (CustomData_get_named_layer_index(&me->fdata, CD_MCOL, name) != -1);
300                 }
301                 else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT)
302                         return (defgroup_name_index(ob, surface->output_name) != -1);
303         }
304
305         return 0;
306 }
307
308 static int surface_duplicateOutputExists(void *arg, const char *name)
309 {
310         DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg;
311         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
312
313         for(; surface; surface=surface->next) {
314                 if (surface!=t_surface && surface->type==t_surface->type &&
315                         surface->format==t_surface->format) {
316                         if (surface->output_name[0]!='\0' && !strcmp(name, surface->output_name)) return 1;
317                         if (surface->output_name2[0]!='\0' && !strcmp(name, surface->output_name2)) return 1;
318                 }
319         }
320         return 0;
321 }
322
323 static void surface_setUniqueOutputName(DynamicPaintSurface *surface, char *basename, int output)
324 {
325         char name[64];
326         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
327         if (!output)
328                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name, sizeof(surface->output_name));
329         if (output)
330                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name2, sizeof(surface->output_name2));
331 }
332
333
334 static int surface_duplicateNameExists(void *arg, const char *name)
335 {
336         DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg;
337         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
338
339         for(; surface; surface=surface->next) {
340                 if (surface!=t_surface && !strcmp(name, surface->name)) return 1;
341         }
342         return 0;
343 }
344
345 void dynamicPaintSurface_setUniqueName(DynamicPaintSurface *surface, const char *basename)
346 {
347         char name[64];
348         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
349         BLI_uniquename_cb(surface_duplicateNameExists, surface, name, '.', surface->name, sizeof(surface->name));
350 }
351
352
353 /* change surface data to defaults on new type */
354 void dynamicPaintSurface_updateType(struct DynamicPaintSurface *surface)
355 {
356         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
357                 surface->output_name[0]='\0';
358                 surface->output_name2[0]='\0';
359                 surface->flags |= MOD_DPAINT_ANTIALIAS;
360                 surface->depth_clamp = 1.0f;
361         }
362         else {
363                 strcpy(surface->output_name, "dp_");
364                 strcpy(surface->output_name2, surface->output_name);
365                 surface->flags &= ~MOD_DPAINT_ANTIALIAS;
366                 surface->depth_clamp = 0.0f;
367         }
368
369         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
370                 strcat(surface->output_name,"paintmap");
371                 strcat(surface->output_name2,"wetmap");
372                 surface_setUniqueOutputName(surface, surface->output_name2, 1);
373         }
374         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
375                 strcat(surface->output_name,"displace");
376         }
377         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
378                 strcat(surface->output_name,"weight");
379         }
380         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
381                 strcat(surface->output_name,"wave");
382         }
383
384         surface_setUniqueOutputName(surface, surface->output_name, 0);
385
386         /* update preview */
387         if (dynamicPaint_surfaceHasColorPreview(surface))
388                 dynamicPaint_setPreview(surface);
389         else
390                 dynamicPaint_resetPreview(surface->canvas);
391 }
392
393 static int surface_totalSamples(DynamicPaintSurface *surface)
394 {
395         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ &&
396                 surface->flags & MOD_DPAINT_ANTIALIAS)
397                 return (surface->data->total_points*5);
398         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
399                 surface->flags & MOD_DPAINT_ANTIALIAS && surface->data->adj_data)
400                 return (surface->data->total_points+surface->data->adj_data->total_targets);
401
402         return surface->data->total_points;
403 }
404
405 static void blendColors(float t_color[3], float t_alpha, float s_color[3], float s_alpha, float result[4])
406 {
407         int i;
408         float i_alpha = 1.0f - s_alpha;
409         float f_alpha = t_alpha*i_alpha + s_alpha;
410
411         /* blend colors */
412         if (f_alpha) {
413                 for (i=0; i<3; i++) {
414                         result[i] = (t_color[i]*t_alpha*i_alpha + s_color[i]*s_alpha)/f_alpha;
415                 }
416         }
417         else {
418                 copy_v3_v3(result, t_color);
419         }
420         /* return final alpha */
421         result[3] = f_alpha;
422 }
423
424 /* Mix two alpha weighed colors by a defined ratio. output is saved at a_color */
425 static float mixColors(float a_color[3], float a_weight, float b_color[3], float b_weight, float ratio)
426 {
427         float weight_ratio, factor;
428         if (b_weight) {
429                 /* if first value has no weight just use b_color */
430                 if (!a_weight) {
431                         copy_v3_v3(a_color, b_color);
432                         return b_weight*ratio;
433                 }
434                 weight_ratio = b_weight/(a_weight+b_weight);
435         }
436         else return a_weight*(1.0f-ratio);
437
438         /* calculate final interpolation factor */
439         if (ratio<=0.5f) {
440                 factor = weight_ratio*(ratio*2.0f);
441         }
442         else {
443                 ratio = (ratio*2.0f - 1.0f);
444                 factor = weight_ratio*(1.0f-ratio) + ratio;
445         }
446         /* mix final color */
447         interp_v3_v3v3(a_color, a_color, b_color, factor);
448         return (1.0f-factor)*a_weight + factor*b_weight;
449 }
450
451 /* set "ignore cache" flag for all caches on this object */
452 static void object_cacheIgnoreClear(Object *ob, int state)
453 {
454         ListBase pidlist;
455         PTCacheID *pid;
456         BKE_ptcache_ids_from_object(&pidlist, ob, NULL, 0);
457
458         for(pid=pidlist.first; pid; pid=pid->next) {
459                 if(pid->cache) {
460                         if (state)
461                                 pid->cache->flag |= PTCACHE_IGNORE_CLEAR;
462                         else
463                                 pid->cache->flag &= ~PTCACHE_IGNORE_CLEAR;
464                 }
465         }
466
467         BLI_freelistN(&pidlist);
468 }
469
470 static int subframe_updateObject(Scene *scene, Object *ob, int flags, float frame)
471 {
472         DynamicPaintModifierData *pmd = (DynamicPaintModifierData *)modifiers_findByType(ob, eModifierType_DynamicPaint);
473         bConstraint *con;
474
475         /* if other is dynamic paint canvas, dont update */
476         if (pmd && pmd->canvas)
477                 return 1;
478
479         /* if object has parents, update them too */
480         if (flags & UPDATE_PARENTS) {
481                 int is_canvas = 0;
482                 if (ob->parent) is_canvas += subframe_updateObject(scene, ob->parent, 0, frame);
483                 if (ob->track) is_canvas += subframe_updateObject(scene, ob->track, 0, frame);
484
485                 /* skip subframe if object is parented
486                 *  to vertex of a dynamic paint canvas */
487                 if (is_canvas && (ob->partype == PARVERT1 || ob->partype == PARVERT3))
488                         return 0;
489
490                 /* also update constraint targets */
491                 for (con = ob->constraints.first; con; con=con->next) {
492                         bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
493                         ListBase targets = {NULL, NULL};
494
495                         if (cti && cti->get_constraint_targets) {
496                                 bConstraintTarget *ct;
497                                 cti->get_constraint_targets(con, &targets);
498                                 for (ct= targets.first; ct; ct= ct->next) {
499                                         if (ct->tar)
500                                                 subframe_updateObject(scene, ct->tar, 0, frame);
501                                 }
502                                 /* free temp targets */
503                                 if (cti->flush_constraint_targets)
504                                         cti->flush_constraint_targets(con, &targets, 0);
505                         }
506                 }
507         }
508         /* for curve following objects, parented curve has to be updated too */
509         if(ob->type==OB_CURVE) {
510                 Curve *cu= ob->data;
511                 BKE_animsys_evaluate_animdata(scene, &cu->id, cu->adt, frame, ADT_RECALC_ANIM);
512         }
513
514         ob->recalc |= OB_RECALC_ALL;
515         BKE_animsys_evaluate_animdata(scene, &ob->id, ob->adt, frame, ADT_RECALC_ANIM);
516         if (flags & UPDATE_MESH) {
517                 /* ignore cache clear during subframe updates
518                 *  to not mess up cache validity */
519                 object_cacheIgnoreClear(ob, 1);
520                 object_handle_update(scene, ob);
521                 object_cacheIgnoreClear(ob, 0);
522         }
523         else
524                 where_is_object_time(scene, ob, frame);
525
526         return 0;
527 }
528
529 static void scene_setSubframe(Scene *scene, float subframe)
530 {
531         /* dynamic paint subframes must be done on previous frame */
532         scene->r.cfra -= 1;
533         scene->r.subframe = subframe;
534 }
535
536 static int surface_getBrushFlags(DynamicPaintSurface *surface, Scene *scene)
537 {
538         Base *base = NULL;
539         GroupObject *go = NULL; 
540         Object *brushObj = NULL;
541         ModifierData *md = NULL;
542
543         int flags = 0;
544
545         if(surface->brush_group)
546                 go = surface->brush_group->gobject.first;
547         else
548                 base = scene->base.first;
549
550         while (base || go)
551         {
552                 brushObj = NULL;
553
554                 /* select object */
555                 if(surface->brush_group) {                                              
556                         if(go->ob)      brushObj = go->ob;                                      
557                 }                                       
558                 else                                            
559                         brushObj = base->object;
560
561                 if(!brushObj)                                   
562                 {
563                         if(surface->brush_group) go = go->next;
564                         else base= base->next;                                  
565                         continue;                       
566                 }
567
568                 if(surface->brush_group)
569                         go = go->next;
570                 else
571                         base= base->next;
572
573                 md = modifiers_findByType(brushObj, eModifierType_DynamicPaint);
574                 if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render))                                    
575                 {
576                         DynamicPaintModifierData *pmd2 = (DynamicPaintModifierData *)md;
577
578                         if (pmd2->brush)
579                         {
580                                 DynamicPaintBrushSettings *brush = pmd2->brush;
581
582                                 if (brush->flags & MOD_DPAINT_USES_VELOCITY)
583                                         flags |= BRUSH_USES_VELOCITY;
584                         }
585                 }
586         }
587
588         return flags;
589 }
590
591 static int brush_usesMaterial(DynamicPaintBrushSettings *brush, Scene *scene)
592 {
593         return ((brush->flags & MOD_DPAINT_USE_MATERIAL) && (!strcmp(scene->r.engine, "BLENDER_RENDER")));
594 }
595
596 /* check whether two bounds intersect */
597 static int boundsIntersect(Bounds3D *b1, Bounds3D *b2)
598 {
599         int i=2;
600         if (!b1->valid || !b2->valid) return 0;
601         for (; i>=0; i-=1)
602                 if (!(b1->min[i] <= b2->max[i] && b1->max[i] >= b2->min[i])) return 0;
603         return 1;
604 }
605
606 /* check whether two bounds intersect inside defined proximity */
607 static int boundsIntersectDist(Bounds3D *b1, Bounds3D *b2, float dist)
608 {
609         int i=2;
610         if (!b1->valid || !b2->valid) return 0;
611         for (; i>=0; i-=1)
612                 if (!(b1->min[i] <= (b2->max[i]+dist) && b1->max[i] >= (b2->min[i]-dist))) return 0;
613         return 1;
614 }
615
616 /* check whether bounds intersects a point with given radius */
617 static int boundIntersectPoint(Bounds3D *b, float point[3], float radius)
618 {
619         int i=2;
620         if (!b->valid) return 0;
621         for (; i>=0; i-=1)
622                 if (!(b->min[i] <= (point[i]+radius) && b->max[i] >= (point[i]-radius))) return 0;
623         return 1;
624 }
625
626 /* expand bounds by a new point */
627 static void boundInsert(Bounds3D *b, float point[3])
628 {
629         int i=2;
630         if (!b->valid) {
631                 copy_v3_v3(b->min, point);
632                 copy_v3_v3(b->max, point);
633                 b->valid = 1;
634         }
635         else {
636                 for (; i>=0; i-=1) {
637                         if (point[i] < b->min[i]) b->min[i]=point[i];
638                         if (point[i] > b->max[i]) b->max[i]=point[i];
639                 }
640         }
641 }
642
643 float getSurfaceDimension(PaintSurfaceData *sData)
644 {
645         Bounds3D *mb = &sData->bData->mesh_bounds;
646         return MAX3((mb->max[0]-mb->min[0]), (mb->max[1]-mb->min[1]), (mb->max[2]-mb->min[2]));
647 }
648
649 static void freeGrid(PaintSurfaceData *data)
650 {
651         PaintBakeData *bData = data->bData;
652         VolumeGrid *grid = bData->grid;
653
654         if (grid->bounds) MEM_freeN(grid->bounds);
655         if (grid->s_pos) MEM_freeN(grid->s_pos);
656         if (grid->s_num) MEM_freeN(grid->s_num);
657         if (grid->t_index) MEM_freeN(grid->t_index);
658
659         MEM_freeN(bData->grid);
660         bData->grid = NULL;
661 }
662
663 static void surfaceGenerateGrid(struct DynamicPaintSurface *surface)
664 {
665         PaintSurfaceData *sData = surface->data;
666         PaintBakeData *bData = sData->bData;
667         Bounds3D *grid_bounds;
668         VolumeGrid *grid;
669         int grid_cells, axis = 3;
670         int *temp_t_index = NULL;
671         int *temp_s_num = NULL;
672
673 #ifdef _OPENMP
674         int num_of_threads = omp_get_max_threads();
675 #else
676         int num_of_threads = 1;
677 #endif
678
679         if (bData->grid)
680                 freeGrid(sData);
681
682         /* allocate separate bounds for each thread */
683         grid_bounds = MEM_callocN(sizeof(Bounds3D)*num_of_threads, "Grid Bounds");
684         bData->grid = MEM_callocN(sizeof(VolumeGrid), "Surface Grid");
685         grid = bData->grid;
686
687         if (grid && grid_bounds) {
688                 int i, error = 0;
689                 float dim_factor, volume, dim[3];
690                 float td[3];
691                 float min_dim;
692
693                 /* calculate canvas dimensions */
694                 #pragma omp parallel for schedule(static)
695                 for (i=0; i<sData->total_points; i++) {
696                         #ifdef _OPENMP
697                         int id = omp_get_thread_num();
698                         boundInsert(&grid_bounds[id], (bData->realCoord[bData->s_pos[i]].v));
699                         #else
700                         boundInsert(&grid_bounds[0], (bData->realCoord[bData->s_pos[i]].v));
701                         #endif
702                 }
703
704                 /* get final dimensions */
705                 for (i=0; i<num_of_threads; i++) {
706                         boundInsert(&grid->grid_bounds, grid_bounds[i].min);
707                         boundInsert(&grid->grid_bounds, grid_bounds[i].max);
708                 }
709
710                 /* get dimensions */
711                 sub_v3_v3v3(dim, grid->grid_bounds.max, grid->grid_bounds.min);
712                 copy_v3_v3(td, dim);
713                 min_dim = MAX3(td[0],td[1],td[2]) / 1000.f;
714
715                 /* deactivate zero axises */
716                 for (i=0; i<3; i++) {
717                         if (td[i]<min_dim) {td[i]=1.0f; axis-=1;}
718                 }
719
720                 if (axis == 0 || MAX3(td[0],td[1],td[2]) < 0.0001f) {
721                         MEM_freeN(grid_bounds);
722                         MEM_freeN(bData->grid);
723                         bData->grid = NULL;
724                         return;
725                 }
726
727                 /* now calculate grid volume/area/width depending on num of active axis */
728                 volume = td[0]*td[1]*td[2];
729
730                 /* determine final grid size by trying to fit average 10.000 points per grid cell */
731                 dim_factor = (float)pow(volume / ((double)sData->total_points / 10000.0), 1.0/(double)axis);
732
733                 /* define final grid size using dim_factor, use min 3 for active axises */
734                 for (i=0; i<3; i++) {
735                         grid->dim[i] = (int)floor(td[i] / dim_factor);
736                         CLAMP(grid->dim[i], (dim[i]>=min_dim) ? 3 : 1, 100);
737                 }
738                 grid_cells = grid->dim[0]*grid->dim[1]*grid->dim[2];
739
740                 /* allocate memory for grids */
741                 grid->bounds = MEM_callocN(sizeof(Bounds3D) * grid_cells, "Surface Grid Bounds");
742                 grid->s_pos = MEM_callocN(sizeof(int) * grid_cells, "Surface Grid Position");
743                 grid->s_num = MEM_callocN(sizeof(int) * grid_cells*num_of_threads, "Surface Grid Points");
744                 temp_s_num = MEM_callocN(sizeof(int) * grid_cells, "Temp Surface Grid Points");
745                 grid->t_index = MEM_callocN(sizeof(int) * sData->total_points, "Surface Grid Target Ids");
746                 temp_t_index = MEM_callocN(sizeof(int) * sData->total_points, "Temp Surface Grid Target Ids");
747
748                 /* in case of an allocation failture abort here */
749                 if (!grid->bounds || !grid->s_pos || !grid->s_num || !grid->t_index || !temp_s_num || !temp_t_index)
750                         error = 1;
751
752                 if (!error) {
753                         /* calculate number of points withing each cell */
754                         #pragma omp parallel for schedule(static)
755                         for (i=0; i<sData->total_points; i++) {
756                                 int co[3], j;
757                                 for (j=0; j<3; j++) {
758                                         co[j] = (int)floor((bData->realCoord[bData->s_pos[i]].v[j] - grid->grid_bounds.min[j])/dim[j]*grid->dim[j]);
759                                         CLAMP(co[j], 0, grid->dim[j]-1);
760                                 }
761
762                                 temp_t_index[i] = co[0] + co[1] * grid->dim[0] + co[2] * grid->dim[0]*grid->dim[1];
763                                 #ifdef _OPENMP
764                                 grid->s_num[temp_t_index[i]+omp_get_thread_num()*grid_cells]++;
765                                 #else
766                                 grid->s_num[temp_t_index[i]]++;
767                                 #endif
768                         }
769
770                         /* for first cell only calc s_num */
771                         for (i=1; i<num_of_threads; i++) {
772                                 grid->s_num[0] += grid->s_num[i*grid_cells];
773                         }
774
775                         /* calculate grid indexes */
776                         for (i=1; i<grid_cells; i++) {
777                                 int id;
778                                 for (id=1; id<num_of_threads; id++) {
779                                         grid->s_num[i] += grid->s_num[i+id*grid_cells];
780                                 }
781                                 grid->s_pos[i] = grid->s_pos[i-1] + grid->s_num[i-1];
782                         }
783
784                         /* save point indexes to final array */
785                         for (i=0; i<sData->total_points; i++) {
786                                 int pos = grid->s_pos[temp_t_index[i]] + temp_s_num[temp_t_index[i]];
787                                 grid->t_index[pos] = i;
788
789                                 temp_s_num[temp_t_index[i]]++;
790                         }
791
792                         /* calculate cell bounds */
793                         {
794                                 int x;
795                                 #pragma omp parallel for schedule(static)
796                                 for (x=0; x<grid->dim[0]; x++) {
797                                         int y;
798                                         for (y=0; y<grid->dim[1]; y++) {
799                                                 int z;
800                                                 for (z=0; z<grid->dim[2]; z++) {
801                                                         int j, b_index = x + y * grid->dim[0] + z * grid->dim[0]*grid->dim[1];
802                                                         /* set bounds */
803                                                         for (j=0; j<3; j++) {
804                                                                 int s = (j==0) ? x : ((j==1) ? y : z);
805                                                                 grid->bounds[b_index].min[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*s;
806                                                                 grid->bounds[b_index].max[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*(s+1);
807                                                         }
808                                                         grid->bounds[b_index].valid = 1;
809                                                 }
810                                         }
811                                 }
812                         }
813                 }
814
815                 if (temp_s_num) MEM_freeN(temp_s_num);
816                 if (temp_t_index) MEM_freeN(temp_t_index);
817
818                 /* free per thread s_num values */
819                 grid->s_num = MEM_reallocN(grid->s_num, sizeof(int) * grid_cells);
820
821                 if (error || !grid->s_num) {
822                         setError(surface->canvas, "Not enough free memory.");
823                         freeGrid(sData);
824                 }
825         }
826
827         if (grid_bounds) MEM_freeN(grid_bounds);
828 }
829
830 /***************************** Freeing data ******************************/
831
832 /* Free brush data */
833 void dynamicPaint_freeBrush(struct DynamicPaintModifierData *pmd)
834 {
835         if(pmd->brush) {
836                 if(pmd->brush->dm)
837                         pmd->brush->dm->release(pmd->brush->dm);
838                 pmd->brush->dm = NULL;
839
840                 if(pmd->brush->paint_ramp)
841                          MEM_freeN(pmd->brush->paint_ramp);
842                 pmd->brush->paint_ramp = NULL;
843                 if(pmd->brush->vel_ramp)
844                          MEM_freeN(pmd->brush->vel_ramp);
845                 pmd->brush->vel_ramp = NULL;
846
847                 MEM_freeN(pmd->brush);
848                 pmd->brush = NULL;
849         }
850 }
851
852 static void dynamicPaint_freeAdjData(PaintSurfaceData *data)
853 {
854         if (data->adj_data) {
855                 if (data->adj_data->n_index) MEM_freeN(data->adj_data->n_index);
856                 if (data->adj_data->n_num) MEM_freeN(data->adj_data->n_num);
857                 if (data->adj_data->n_target) MEM_freeN(data->adj_data->n_target);
858                 if (data->adj_data->flags) MEM_freeN(data->adj_data->flags);
859                 MEM_freeN(data->adj_data);
860                 data->adj_data = NULL;
861         }
862 }
863
864 static void free_bakeData(PaintSurfaceData *data)
865 {
866         PaintBakeData *bData = data->bData;
867         if (bData) {
868                 if (bData->bNormal) MEM_freeN(bData->bNormal);
869                 if (bData->s_pos) MEM_freeN(bData->s_pos);
870                 if (bData->s_num) MEM_freeN(bData->s_num);
871                 if (bData->realCoord) MEM_freeN(bData->realCoord);
872                 if (bData->bNeighs) MEM_freeN(bData->bNeighs);
873                 if (bData->grid) freeGrid(data);
874                 if (bData->prev_verts) MEM_freeN(bData->prev_verts);
875                 if (bData->velocity) MEM_freeN(bData->velocity);
876                 if (bData->prev_velocity) MEM_freeN(bData->prev_velocity);
877
878                 MEM_freeN(data->bData);
879                 data->bData = NULL;
880         }
881 }
882
883 /* free surface data if it's not used anymore */
884 void surface_freeUnusedData(DynamicPaintSurface *surface)
885 {
886         if (!surface->data) return;
887
888         /* free bakedata if not active or surface is baked */
889         if (!(surface->flags & MOD_DPAINT_ACTIVE) ||
890                 (surface->pointcache && surface->pointcache->flag & PTCACHE_BAKED))
891                 free_bakeData(surface->data);
892 }
893
894 void dynamicPaint_freeSurfaceData(DynamicPaintSurface *surface)
895 {
896         PaintSurfaceData *data = surface->data;
897         if (!data) return;
898         if (data->format_data) {
899                 /* format specific free */
900                 if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
901                         ImgSeqFormatData *format_data = (ImgSeqFormatData*)data->format_data;
902                         if (format_data->uv_p)
903                                 MEM_freeN(format_data->uv_p);
904                         if (format_data->barycentricWeights)
905                                 MEM_freeN(format_data->barycentricWeights);
906                 }
907                 MEM_freeN(data->format_data);
908         }
909         /* type data */
910         if (data->type_data) MEM_freeN(data->type_data);
911         dynamicPaint_freeAdjData(data);
912         /* bake data */
913         free_bakeData(data);
914
915         MEM_freeN(surface->data);
916         surface->data = NULL;
917 }
918
919 void dynamicPaint_freeSurface(DynamicPaintSurface *surface)
920 {
921         /* point cache */
922         BKE_ptcache_free_list(&(surface->ptcaches));
923         surface->pointcache = NULL;
924
925         if(surface->effector_weights)
926                 MEM_freeN(surface->effector_weights);
927         surface->effector_weights = NULL;
928
929         BLI_remlink(&(surface->canvas->surfaces), surface);
930         dynamicPaint_freeSurfaceData(surface);
931         MEM_freeN(surface);
932 }
933
934 /* Free canvas data */
935 void dynamicPaint_freeCanvas(DynamicPaintModifierData *pmd)
936 {
937         if(pmd->canvas) {
938                 /* Free surface data */
939                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
940                 DynamicPaintSurface *next_surface = NULL;
941
942                 while (surface) {
943                         next_surface = surface->next;
944                         dynamicPaint_freeSurface(surface);
945                         surface = next_surface;
946                 }
947
948                 /* free dm copy */
949                 if (pmd->canvas->dm)
950                         pmd->canvas->dm->release(pmd->canvas->dm);
951                 pmd->canvas->dm = NULL;
952
953                 MEM_freeN(pmd->canvas);
954                 pmd->canvas = NULL;
955         }
956 }
957
958 /* Free whole dp modifier */
959 void dynamicPaint_Modifier_free(struct DynamicPaintModifierData *pmd)
960 {
961         if(pmd) {
962                 dynamicPaint_freeCanvas(pmd);
963                 dynamicPaint_freeBrush(pmd);
964         }
965 }
966
967
968 /***************************** Initialize and reset ******************************/
969
970 /*
971 *       Creates a new surface and adds it to the list
972 *       If scene is null, frame range of 1-250 is used
973 *       A pointer to this surface is returned
974 */
975 struct DynamicPaintSurface *dynamicPaint_createNewSurface(DynamicPaintCanvasSettings *canvas, Scene *scene)
976 {
977         DynamicPaintSurface *surface= MEM_callocN(sizeof(DynamicPaintSurface), "DynamicPaintSurface");
978         if (!surface) return NULL;
979
980         surface->canvas = canvas;
981         surface->format = MOD_DPAINT_SURFACE_F_VERTEX;
982         surface->type = MOD_DPAINT_SURFACE_T_PAINT;
983
984         /* cache */
985         surface->pointcache = BKE_ptcache_add(&(surface->ptcaches));
986         surface->pointcache->flag |= PTCACHE_DISK_CACHE;
987         surface->pointcache->step = 1;
988
989         /* Set initial values */
990         surface->flags = MOD_DPAINT_ANTIALIAS | MOD_DPAINT_MULALPHA | MOD_DPAINT_DRY_LOG | MOD_DPAINT_DISSOLVE_LOG |
991                                          MOD_DPAINT_ACTIVE | MOD_DPAINT_PREVIEW | MOD_DPAINT_OUT1 | MOD_DPAINT_USE_DRYING;
992         surface->effect = 0;
993         surface->effect_ui = 1;
994
995         surface->diss_speed = 250;
996         surface->dry_speed = 500;
997         surface->color_dry_threshold = 1.0f;
998         surface->depth_clamp = 0.0f;
999         surface->disp_factor = 1.0f;
1000         surface->disp_type = MOD_DPAINT_DISP_DISPLACE;
1001         surface->image_fileformat = MOD_DPAINT_IMGFORMAT_PNG;
1002
1003         surface->influence_scale = 1.0f;
1004         surface->radius_scale = 1.0f;
1005
1006         surface->init_color[0] = 1.0f;
1007         surface->init_color[1] = 1.0f;
1008         surface->init_color[2] = 1.0f;
1009         surface->init_color[3] = 1.0f;
1010
1011         surface->image_resolution = 256;
1012         surface->substeps = 0;
1013
1014         if (scene) {
1015                 surface->start_frame = scene->r.sfra;
1016                 surface->end_frame = scene->r.efra;
1017         }
1018         else {
1019                 surface->start_frame = 1;
1020                 surface->end_frame = 250;
1021         }
1022
1023         surface->spread_speed = 1.0f;
1024         surface->color_spread_speed = 1.0f;
1025         surface->shrink_speed = 1.0f;
1026
1027         surface->wave_damping = 0.04f;
1028         surface->wave_speed = 1.0f;
1029         surface->wave_timescale = 1.0f;
1030         surface->wave_spring = 0.20f;
1031
1032         modifier_path_init(surface->image_output_path, sizeof(surface->image_output_path), "cache_dynamicpaint");
1033
1034         dynamicPaintSurface_setUniqueName(surface, "Surface");
1035
1036         surface->effector_weights = BKE_add_effector_weights(NULL);
1037
1038         dynamicPaintSurface_updateType(surface);
1039
1040         BLI_addtail(&canvas->surfaces, surface);
1041
1042         return surface;
1043 }
1044
1045 /*
1046 *       Initialize modifier data
1047 */
1048 int dynamicPaint_createType(struct DynamicPaintModifierData *pmd, int type, struct Scene *scene)
1049 {
1050         if(pmd) {
1051                 if(type == MOD_DYNAMICPAINT_TYPE_CANVAS) {
1052                         DynamicPaintCanvasSettings *canvas;
1053                         if(pmd->canvas)
1054                                 dynamicPaint_freeCanvas(pmd);
1055
1056                         canvas = pmd->canvas = MEM_callocN(sizeof(DynamicPaintCanvasSettings), "DynamicPaint Canvas");
1057                         if (!canvas)
1058                                 return 0;
1059                         canvas->pmd = pmd;
1060                         canvas->dm = NULL;
1061
1062                         /* Create one surface */
1063                         if (!dynamicPaint_createNewSurface(canvas, scene))
1064                                 return 0;
1065
1066                 }
1067                 else if(type == MOD_DYNAMICPAINT_TYPE_BRUSH) {
1068                         DynamicPaintBrushSettings *brush;
1069                         if(pmd->brush)
1070                                 dynamicPaint_freeBrush(pmd);
1071
1072                         brush = pmd->brush = MEM_callocN(sizeof(DynamicPaintBrushSettings), "DynamicPaint Paint");
1073                         if (!brush)
1074                                 return 0;
1075                         brush->pmd = pmd;
1076
1077                         brush->psys = NULL;
1078
1079                         brush->flags = MOD_DPAINT_ABS_ALPHA | MOD_DPAINT_RAMP_ALPHA;
1080                         brush->collision = MOD_DPAINT_COL_VOLUME;
1081                         
1082                         brush->mat = NULL;
1083                         brush->r = 0.15f;
1084                         brush->g = 0.4f;
1085                         brush->b = 0.8f;
1086                         brush->alpha = 1.0f;
1087                         brush->wetness = 1.0f;
1088
1089                         brush->paint_distance = 1.0f;
1090                         brush->proximity_falloff = MOD_DPAINT_PRFALL_SMOOTH;
1091
1092                         brush->particle_radius = 0.2f;
1093                         brush->particle_smooth = 0.05f;
1094
1095                         brush->wave_type = MOD_DPAINT_WAVEB_CHANGE;
1096                         brush->wave_factor = 1.0f;
1097                         brush->wave_clamp = 0.0f;
1098                         brush->smudge_strength = 0.3f;
1099                         brush->max_velocity = 1.0f;
1100
1101                         brush->dm = NULL;
1102
1103                         /* Paint proximity falloff colorramp. */
1104                         {
1105                                 CBData *ramp;
1106
1107                                 brush->paint_ramp = add_colorband(0);
1108                                 if (!brush->paint_ramp)
1109                                         return 0;
1110                                 ramp = brush->paint_ramp->data;
1111                                 /* Add default smooth-falloff ramp.     */
1112                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = 1.0f;
1113                                 ramp[0].pos = 0.0f;
1114                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].pos = 1.0f;
1115                                 ramp[1].a = 0.0f;
1116                                 pmd->brush->paint_ramp->tot = 2;
1117                         }
1118
1119                         /* Brush velocity ramp. */
1120                         {
1121                                 CBData *ramp;
1122
1123                                 brush->vel_ramp = add_colorband(0);
1124                                 if (!brush->vel_ramp)
1125                                         return 0;
1126                                 ramp = brush->vel_ramp->data;
1127                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = ramp[0].pos = 0.0f;
1128                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].a = ramp[1].pos = 1.0f;
1129                                 brush->paint_ramp->tot = 2;
1130                         }
1131                 }
1132         }
1133         else
1134                 return 0;
1135
1136         return 1;
1137 }
1138
1139 void dynamicPaint_Modifier_copy(struct DynamicPaintModifierData *pmd, struct DynamicPaintModifierData *tpmd)
1140 {
1141         /* Init modifier        */
1142         tpmd->type = pmd->type;
1143         if (pmd->canvas)
1144                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_CANVAS, NULL);
1145         if (pmd->brush)
1146                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_BRUSH, NULL);
1147
1148         /* Copy data    */
1149         if (tpmd->canvas) {
1150                 tpmd->canvas->pmd = tpmd;
1151
1152         } else if (tpmd->brush) {
1153                 DynamicPaintBrushSettings *brush = pmd->brush, *t_brush = tpmd->brush;
1154                 t_brush->pmd = tpmd;
1155
1156                 t_brush->flags = brush->flags;
1157                 t_brush->collision = brush->collision;
1158
1159                 t_brush->mat = brush->mat;
1160                 t_brush->r = brush->r;
1161                 t_brush->g = brush->g;
1162                 t_brush->b = brush->b;
1163                 t_brush->alpha = brush->alpha;
1164                 t_brush->wetness = brush->wetness;
1165
1166                 t_brush->particle_radius = brush->particle_radius;
1167                 t_brush->particle_smooth = brush->particle_smooth;
1168                 t_brush->paint_distance = brush->paint_distance;
1169                 t_brush->psys = brush->psys;
1170
1171                 if (brush->paint_ramp)
1172                         memcpy(t_brush->paint_ramp, brush->paint_ramp, sizeof(ColorBand));
1173                 if (brush->vel_ramp)
1174                         memcpy(t_brush->vel_ramp, brush->vel_ramp, sizeof(ColorBand));
1175
1176                 t_brush->proximity_falloff = brush->proximity_falloff;
1177                 t_brush->wave_type = brush->wave_type;
1178                 t_brush->ray_dir = brush->ray_dir;
1179
1180                 t_brush->wave_factor = brush->wave_factor;
1181                 t_brush->wave_clamp = brush->wave_clamp;
1182                 t_brush->max_velocity = brush->max_velocity;
1183                 t_brush->smudge_strength = brush->smudge_strength;
1184         }
1185 }
1186
1187 /* allocates surface data depending on surface type */
1188 static void dynamicPaint_allocateSurfaceType(DynamicPaintSurface *surface)
1189 {
1190         PaintSurfaceData *sData = surface->data;
1191
1192         switch (surface->type) {
1193                 case MOD_DPAINT_SURFACE_T_PAINT:
1194                         sData->type_data = MEM_callocN(sizeof(PaintPoint)*sData->total_points, "DynamicPaintSurface Data");
1195                         break;
1196                 case MOD_DPAINT_SURFACE_T_DISPLACE:
1197                         sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface DepthData");
1198                         break;
1199                 case MOD_DPAINT_SURFACE_T_WEIGHT:
1200                         sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface WeightData");
1201                         break;
1202                 case MOD_DPAINT_SURFACE_T_WAVE:
1203                         sData->type_data = MEM_callocN(sizeof(PaintWavePoint)*sData->total_points, "DynamicPaintSurface WaveData");
1204                         break;
1205         }
1206
1207         if (sData->type_data == NULL) setError(surface->canvas, "Not enough free memory!");
1208 }
1209
1210 static int surface_usesAdjDistance(DynamicPaintSurface *surface)
1211 {
1212         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT && surface->effect) return 1;
1213         if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 1;
1214         return 0;
1215 }
1216
1217 static int surface_usesAdjData(DynamicPaintSurface *surface)
1218 {
1219         if (surface_usesAdjDistance(surface)) return 1;
1220         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
1221                 surface->flags & MOD_DPAINT_ANTIALIAS) return 1;
1222
1223         return 0;
1224 }
1225
1226 /* initialize surface adjacency data */
1227 static void dynamicPaint_initAdjacencyData(DynamicPaintSurface *surface, int force_init)
1228 {
1229         PaintSurfaceData *sData = surface->data;
1230         DerivedMesh *dm = surface->canvas->dm;
1231         PaintAdjData *ad;
1232         int *temp_data;
1233         int neigh_points = 0;
1234
1235         if (!surface_usesAdjData(surface) && !force_init) return;
1236
1237         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1238                 /* For vertex format, neighbours are connected by edges */
1239                 neigh_points = 2*dm->getNumEdges(dm);
1240         }
1241         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ)
1242                 neigh_points = sData->total_points*8;
1243
1244         if (!neigh_points) return;
1245
1246         /* allocate memory */
1247         ad = sData->adj_data = MEM_callocN(sizeof(PaintAdjData), "Surface Adj Data");
1248         if (!ad) return;
1249         ad->n_index = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Index");
1250         ad->n_num = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Counts");
1251         temp_data = MEM_callocN(sizeof(int)*sData->total_points, "Temp Adj Data");
1252         ad->n_target = MEM_callocN(sizeof(int)*neigh_points, "Surface Adj Targets");
1253         ad->flags = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Flags");
1254         ad->total_targets = neigh_points;
1255
1256         /* in case of allocation error, free memory */
1257         if (!ad->n_index || !ad->n_num || !ad->n_target || !temp_data) {
1258                 dynamicPaint_freeAdjData(sData);
1259                 if (temp_data) MEM_freeN(temp_data);
1260                 setError(surface->canvas, "Not enough free memory.");
1261                 return;
1262         }
1263
1264         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1265                 int i;
1266                 int n_pos;
1267
1268                 /* For vertex format, count every vertex that is connected by an edge */
1269                 int numOfEdges = dm->getNumEdges(dm);
1270                 int numOfPolys = dm->getNumPolys(dm);
1271                 struct MEdge *edge =  dm->getEdgeArray(dm);
1272                 struct MPoly *mpoly = dm->getPolyArray(dm);
1273                 struct MLoop *mloop = dm->getLoopArray(dm);
1274
1275                 /* count number of edges per vertex */
1276                 for (i=0; i<numOfEdges; i++) {
1277                         ad->n_num[edge[i].v1]++;
1278                         ad->n_num[edge[i].v2]++;
1279
1280                         temp_data[edge[i].v1]++;
1281                         temp_data[edge[i].v2]++;
1282                 }
1283
1284                 /* also add number of vertices to temp_data
1285                 *  to locate points on "mesh edge" */
1286                 for (i=0; i<numOfPolys; i++) {
1287                         int j=0;
1288                         for (; j<mpoly[i].totloop; j++) {
1289                                 temp_data[mloop[mpoly[i].loopstart + j].v]++;
1290                         }
1291                 }
1292
1293                 /* now check if total number of edges+faces for
1294                 *  each vertex is even, if not -> vertex is on mesh edge */
1295                 for (i=0; i<sData->total_points; i++) {
1296                         if ((temp_data[i]%2) ||
1297                                 temp_data[i] < 4)
1298                                 ad->flags[i] |= ADJ_ON_MESH_EDGE;
1299                                 
1300                         /* reset temp data */ 
1301                         temp_data[i] = 0;
1302                 }
1303
1304                 /* order n_index array */
1305                 n_pos = 0;
1306                 for (i=0; i<sData->total_points; i++) {
1307                         ad->n_index[i] = n_pos;
1308                         n_pos += ad->n_num[i];
1309                 }
1310
1311                 /* and now add neighbor data using that info */
1312                 for (i=0; i<numOfEdges; i++) {
1313                         /* first vertex */
1314                         int index = edge[i].v1;
1315                         n_pos = ad->n_index[index]+temp_data[index];
1316                         ad->n_target[n_pos] = edge[i].v2;
1317                         temp_data[index]++;
1318
1319                         /* second vertex */
1320                         index = edge[i].v2;
1321                         n_pos = ad->n_index[index]+temp_data[index];
1322                         ad->n_target[n_pos] = edge[i].v1;
1323                         temp_data[index]++;
1324                 }
1325         }
1326         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1327                 /* for image sequences, only allocate memory.
1328                 *  bake initialization takes care of rest */
1329         }
1330
1331         MEM_freeN(temp_data);
1332 }
1333
1334 void dynamicPaint_setInitialColor(DynamicPaintSurface *surface)
1335 {
1336         PaintSurfaceData *sData = surface->data;
1337         PaintPoint* pPoint = (PaintPoint*)sData->type_data;
1338         DerivedMesh *dm = surface->canvas->dm;
1339         int i;
1340
1341         if (surface->type != MOD_DPAINT_SURFACE_T_PAINT)
1342                 return;
1343
1344         if (surface->init_color_type == MOD_DPAINT_INITIAL_NONE)
1345                 return;
1346         /* Single color */
1347         else if (surface->init_color_type == MOD_DPAINT_INITIAL_COLOR) {
1348                 /* apply color to every surface point */
1349                 #pragma omp parallel for schedule(static)
1350                 for (i=0; i<sData->total_points; i++) {
1351                         copy_v3_v3(pPoint[i].color, surface->init_color);
1352                         pPoint[i].alpha = surface->init_color[3];
1353                 }
1354         }
1355         /* UV mapped texture */
1356         else if (surface->init_color_type == MOD_DPAINT_INITIAL_TEXTURE) {
1357                 Tex *tex = surface->init_texture;
1358                 MTFace *tface;
1359                 MFace *mface = dm->getTessFaceArray(dm);
1360                 int numOfFaces = dm->getNumTessFaces(dm);
1361                 char uvname[MAX_CUSTOMDATA_LAYER_NAME];
1362
1363                 if (!tex) return;
1364
1365                 /* get uv map */
1366                 CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->init_layername, uvname);
1367                 tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1368                 if (!tface) return;
1369
1370                 /* for vertex surface loop through tfaces and find uv color
1371                 *  that provides highest alpha */
1372                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1373                         #pragma omp parallel for schedule(static)
1374                         for (i=0; i<numOfFaces; i++) {
1375                                 int numOfVert = (mface[i].v4) ? 4 : 3;
1376                                 float uv[3] = {0.0f};
1377                                 int j;
1378                                 for (j=0; j<numOfVert; j++) {
1379                                         TexResult texres = {0};
1380                                         unsigned int *vert = (&mface[i].v1)+j;
1381
1382                                         /* remap to -1.0 to 1.0 */
1383                                         uv[0] = tface[i].uv[j][0]*2.0f - 1.0f;
1384                                         uv[1] = tface[i].uv[j][1]*2.0f - 1.0f;
1385
1386                                         multitex_ext_safe(tex, uv, &texres);
1387
1388                                         if (texres.tin > pPoint[*vert].alpha) {
1389                                                 copy_v3_v3(pPoint[*vert].color, &texres.tr);
1390                                                 pPoint[*vert].alpha = texres.tin;
1391                                         }
1392                                 }
1393                         }
1394                 }
1395                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1396                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
1397                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1398
1399                         #pragma omp parallel for schedule(static)
1400                         for (i=0; i<sData->total_points; i++) {
1401                                 float uv[9] = {0.0f};
1402                                 float uv_final[3] = {0.0f};
1403                                 int j;
1404                                 TexResult texres = {0};
1405
1406                                 /* collect all uvs */
1407                                 for (j=0; j<3; j++) {
1408                                         int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j;
1409                                         copy_v2_v2(&uv[j*3], tface[f_data->uv_p[i].face_index].uv[v]);
1410                                 }
1411
1412                                 /* interpolate final uv pos */
1413                                 interp_v3_v3v3v3(       uv_final, &uv[0], &uv[3], &uv[6],
1414                                         f_data->barycentricWeights[i*samples].v);
1415                                 /* remap to -1.0 to 1.0 */
1416                                 uv_final[0] = uv_final[0]*2.0f - 1.0f;
1417                                 uv_final[1] = uv_final[1]*2.0f - 1.0f;
1418                                         
1419                                 multitex_ext_safe(tex, uv_final, &texres);
1420
1421                                 /* apply color */
1422                                 copy_v3_v3(pPoint[i].color, &texres.tr);
1423                                 pPoint[i].alpha = texres.tin;
1424                         }
1425                 }
1426         }
1427         /* vertex color layer */
1428         else if (surface->init_color_type == MOD_DPAINT_INITIAL_VERTEXCOLOR) {
1429
1430                 /* for vertex surface, just copy colors from mcol */
1431                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1432                         MLoop *mloop = dm->getLoopArray(dm);
1433                         int numOfLoops = dm->getNumLoops(dm);
1434                         MCol *col = CustomData_get_layer_named(&dm->loopData, CD_MLOOPCOL, surface->init_layername);
1435                         if (!col) return;
1436
1437                         #pragma omp parallel for schedule(static)
1438                         for (i=0; i<numOfLoops; i++) {
1439                                 pPoint[mloop[i].v].color[0] = 1.0f/255.f*(float)col[i].b;
1440                                 pPoint[mloop[i].v].color[1] = 1.0f/255.f*(float)col[i].g;
1441                                 pPoint[mloop[i].v].color[2] = 1.0f/255.f*(float)col[i].r;
1442                                 pPoint[mloop[i].v].alpha = 1.0f/255.f*(float)col[i].a;
1443                         }
1444                 }
1445                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1446                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
1447                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1448                         MCol *col = CustomData_get_layer_named(&dm->faceData, CD_MCOL, surface->init_layername);
1449                         if (!col) return;
1450
1451                         #pragma omp parallel for schedule(static)
1452                         for (i=0; i<sData->total_points; i++) {
1453                                 int face_ind = f_data->uv_p[i].face_index;
1454                                 float colors[3][4] = {{0.0f,0.0f,0.0f,0.0f}};
1455                                 float final_color[4];
1456                                 int j;
1457                                 /* collect color values */
1458                                 for (j=0; j<3; j++) {
1459                                         int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j;
1460                                         colors[j][0] = 1.0f/255.f*(float)col[face_ind*4+v].b;
1461                                         colors[j][1] = 1.0f/255.f*(float)col[face_ind*4+v].g;
1462                                         colors[j][2] = 1.0f/255.f*(float)col[face_ind*4+v].r;
1463                                         colors[j][3] = 1.0f/255.f*(float)col[face_ind*4+v].a;
1464                                 }
1465                                 
1466                                 /* interpolate final color */
1467                                 interp_v4_v4v4v4(       final_color, colors[0], colors[1], colors[2],
1468                                                 f_data->barycentricWeights[i*samples].v);
1469
1470                                 copy_v3_v3(pPoint[i].color, final_color);
1471                                 pPoint[i].alpha = final_color[3];
1472                         }
1473                 }
1474         }
1475 }
1476
1477 /* clears surface data back to zero */
1478 void dynamicPaint_clearSurface(DynamicPaintSurface *surface)
1479 {
1480         PaintSurfaceData *sData = surface->data;
1481         if (sData && sData->type_data) {
1482                 unsigned int data_size;
1483
1484                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1485                         data_size = sizeof(PaintPoint);
1486                 else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE)
1487                         data_size = sizeof(PaintWavePoint);
1488                 else
1489                         data_size = sizeof(float);
1490
1491                 memset(sData->type_data, 0, data_size * sData->total_points);
1492
1493                 /* set initial color */
1494                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1495                         dynamicPaint_setInitialColor(surface);
1496
1497                 if (sData->bData)
1498                         sData->bData->clear = 1;
1499         }
1500 }
1501
1502 /* completely (re)initializes surface (only for point cache types)*/
1503 int dynamicPaint_resetSurface(DynamicPaintSurface *surface)
1504 {
1505         int numOfPoints = dynamicPaint_surfaceNumOfPoints(surface);
1506         /* free existing data */
1507         if (surface->data) dynamicPaint_freeSurfaceData(surface);
1508
1509         /* dont reallocate for image sequence types. they get handled only on bake */
1510         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 1;
1511         if (numOfPoints < 1) return 0;
1512
1513         /* allocate memory */
1514         surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
1515         if (!surface->data) return 0;
1516
1517         /* allocate data depending on surface type and format */
1518         surface->data->total_points = numOfPoints;
1519         dynamicPaint_allocateSurfaceType(surface);
1520         dynamicPaint_initAdjacencyData(surface, 0);
1521
1522         /* set initial color */
1523         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1524                 dynamicPaint_setInitialColor(surface);
1525
1526         return 1;
1527 }
1528
1529 /* make sure allocated surface size matches current requirements */
1530 static int dynamicPaint_checkSurfaceData(DynamicPaintSurface *surface)
1531 {
1532         if (!surface->data || ((dynamicPaint_surfaceNumOfPoints(surface) != surface->data->total_points))) {
1533                 return dynamicPaint_resetSurface(surface);
1534         }
1535         return 1;
1536 }
1537
1538
1539 /***************************** Modifier processing ******************************/
1540
1541
1542 /* apply displacing vertex surface to the derived mesh */
1543 static void dynamicPaint_applySurfaceDisplace(DynamicPaintSurface *surface, DerivedMesh *result)
1544 {
1545         PaintSurfaceData *sData = surface->data;
1546
1547         if (!sData || surface->format != MOD_DPAINT_SURFACE_F_VERTEX) return;
1548
1549         /* displace paint */
1550         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
1551                 MVert *mvert = result->getVertArray(result);
1552                 int i;
1553                 float* value = (float*)sData->type_data;
1554
1555                 #pragma omp parallel for schedule(static)
1556                 for (i=0; i<sData->total_points; i++) {
1557                         float normal[3], val=value[i]*surface->disp_factor;
1558                         normal_short_to_float_v3(normal, mvert[i].no);
1559                         normalize_v3(normal);
1560
1561                         mvert[i].co[0] -= normal[0]*val;
1562                         mvert[i].co[1] -= normal[1]*val;
1563                         mvert[i].co[2] -= normal[2]*val;
1564                 }
1565         }
1566 }
1567
1568 /*
1569 *       Apply canvas data to the object derived mesh
1570 */
1571 static struct DerivedMesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd,
1572                                                        Object *ob,
1573                                                        DerivedMesh *dm)
1574 {       
1575         DerivedMesh *result = CDDM_copy(dm);
1576
1577         if(pmd->canvas && !(pmd->canvas->flags & MOD_DPAINT_BAKING)) {
1578
1579                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
1580                 int update_normals = 0;
1581
1582                 /* loop through surfaces */
1583                 for (; surface; surface=surface->next) {
1584                         PaintSurfaceData *sData = surface->data;
1585
1586                         if (surface && surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ && sData) {
1587                                 if (!(surface->flags & (MOD_DPAINT_ACTIVE))) continue;
1588
1589                                 /* process vertex surface previews */
1590                                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1591
1592                                         /* vertex color paint */
1593                                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
1594
1595                                                 int i;
1596                                                 PaintPoint* pPoint = (PaintPoint*)sData->type_data;
1597                                                 MLoopCol *col = NULL;
1598                                                 MLoop *mloop = CDDM_get_loops(result);
1599                                                 int totloop = result->numLoopData;
1600
1601                                                 /* paint is stored on dry and wet layers, so mix final color first */
1602                                                 float *fcolor = MEM_callocN(sizeof(float)*sData->total_points*4, "Temp paint color");
1603
1604                                                 #pragma omp parallel for schedule(static)
1605                                                 for (i=0; i<sData->total_points; i++) {
1606                                                         /* blend dry and wet layer */
1607                                                         blendColors(pPoint[i].color, pPoint[i].alpha, pPoint[i].e_color, pPoint[i].e_alpha, &fcolor[i*4]);
1608                                                 }
1609
1610                                                 /* viewport preview */
1611                                                 if (surface->flags & MOD_DPAINT_PREVIEW) {
1612                                                         MPoly *mp = CDDM_get_polys(result);
1613                                                         int totpoly = result->numPolyData;
1614
1615                                                         /* XXX We have to create a CD_WEIGHT_MCOL, else it might sigsev
1616                                                          *     (after a SubSurf mod, eg)... */
1617                                                         if(!result->getTessFaceDataArray(result, CD_WEIGHT_MCOL)) {
1618                                                                 int numFaces = result->getNumTessFaces(result);
1619                                                                 CustomData_add_layer(&result->faceData, CD_WEIGHT_MCOL, CD_CALLOC, NULL, numFaces);
1620                                                         }
1621
1622                                                         /* Save preview results to weight layer to be
1623                                                         *   able to share same drawing methods */
1624                                                         col = CustomData_get_layer(&result->loopData, CD_WEIGHT_MLOOPCOL);
1625                                                         if (!col) col = CustomData_add_layer(&result->loopData, CD_WEIGHT_MLOOPCOL, CD_CALLOC, NULL, totloop);
1626
1627                                                         if (col) {
1628                                                                 #pragma omp parallel for schedule(static)
1629                                                                 for (i=0; i<totpoly; i++) {
1630                                                                         int j=0;
1631                                                                         Material *material = give_current_material(ob, mp[i].mat_nr+1);
1632
1633                                                                         for (; j<mp[i].totloop; j++) {
1634                                                                                 int l_index = mp[i].loopstart + j;
1635                                                                                 int v_index = mloop[l_index].v;
1636
1637                                                                                 if (surface->preview_id == MOD_DPAINT_SURFACE_PREV_PAINT) {
1638                                                                                         float c[3];
1639                                                                                         v_index *= 4;
1640
1641                                                                                         /* Apply material color as base vertex color for preview */
1642                                                                                         col[l_index].a = 255;
1643                                                                                         if (material) {
1644                                                                                                 c[0] = material->r;
1645                                                                                                 c[1] = material->g;
1646                                                                                                 c[2] = material->b;
1647                                                                                         }
1648                                                                                         else { /* default grey */
1649                                                                                                 c[0] = 0.65f;
1650                                                                                                 c[1] = 0.65f;
1651                                                                                                 c[2] = 0.65f;
1652                                                                                         }
1653                                                                                         /* mix surface color */
1654                                                                                         interp_v3_v3v3(c, c, &fcolor[v_index], fcolor[v_index+3]);
1655
1656                                                                                         col[l_index].r = FTOCHAR(c[2]);
1657                                                                                         col[l_index].g = FTOCHAR(c[1]);
1658                                                                                         col[l_index].b = FTOCHAR(c[0]);
1659                                                                                 }
1660                                                                                 else {
1661                                                                                         col[l_index].a = 255;
1662                                                                                         col[l_index].r =
1663                                                                                         col[l_index].g =
1664                                                                                         col[l_index].b = FTOCHAR(pPoint[v_index].wetness);
1665                                                                                 }
1666                                                                         }
1667                                                                 }
1668                                                         }
1669                                                 }
1670
1671
1672                                                 /* save layer data to output layer */
1673
1674                                                 /* paint layer */
1675                                                 col = CustomData_get_layer_named(&result->loopData, CD_MLOOPCOL, surface->output_name);
1676                                                 /* if output layer is lost from a constructive modifier, re-add it */
1677                                                 if (!col && dynamicPaint_outputLayerExists(surface, ob, 0))
1678                                                         col = CustomData_add_layer_named(&result->loopData, CD_MLOOPCOL, CD_CALLOC, NULL, totloop, surface->output_name);
1679                                                 /* apply color */
1680                                                 if (col) {
1681                                                         #pragma omp parallel for schedule(static)
1682                                                         for (i=0; i<totloop; i++) {
1683                                                                 int index = mloop[i].v*4;
1684                                                                 col[i].a = FTOCHAR(fcolor[index+3]);
1685                                                                 col[i].r = FTOCHAR(fcolor[index+2]);
1686                                                                 col[i].g = FTOCHAR(fcolor[index+1]);
1687                                                                 col[i].b = FTOCHAR(fcolor[index]);
1688                                                         }
1689                                                 }
1690                                                 
1691                                                 MEM_freeN(fcolor);
1692
1693                                                 /* wet layer */
1694                                                 col = CustomData_get_layer_named(&result->loopData, CD_MLOOPCOL, surface->output_name2);
1695                                                 /* if output layer is lost from a constructive modifier, re-add it */
1696                                                 if (!col && dynamicPaint_outputLayerExists(surface, ob, 1))
1697                                                         col = CustomData_add_layer_named(&result->loopData, CD_MLOOPCOL, CD_CALLOC, NULL, totloop, surface->output_name2);
1698                                                 /* apply color */
1699                                                 if (col) {
1700                                                         #pragma omp parallel for schedule(static)
1701                                                         for (i=0; i<totloop; i++) {
1702                                                                 int index = mloop[i].v;
1703                                                                 col[i].a = 255;
1704                                                                 col[i].r =
1705                                                                 col[i].g =
1706                                                                 col[i].b = FTOCHAR(pPoint[index].wetness);
1707                                                         }
1708                                                 }
1709                                         }
1710                                         /* vertex group paint */
1711                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
1712                                                 int defgrp_index = defgroup_name_index(ob, surface->output_name);
1713                                                 MDeformVert *dvert = result->getVertDataArray(result, CD_MDEFORMVERT);
1714                                                 float *weight = (float*)sData->type_data;
1715
1716                                                 /* viewport preview */
1717                                                 if (surface->flags & MOD_DPAINT_PREVIEW) {
1718                                                         /* Save preview results to weight layer to be
1719                                                         *   able to share same drawing methods */
1720                                                         DM_update_weight_mcol(ob, result, 0, weight, 0, NULL);
1721                                                 }
1722
1723                                                 /* apply weights into a vertex group, if doesnt exists add a new layer */
1724                                                 if (defgrp_index >= 0 && !dvert && (surface->output_name[0] != '\0'))
1725                                                         dvert = CustomData_add_layer_named(&result->vertData, CD_MDEFORMVERT, CD_CALLOC,
1726                                                                                                                                 NULL, sData->total_points, surface->output_name);
1727                                                 if (defgrp_index >= 0 && dvert) {
1728                                                         int i;
1729                                                         for(i=0; i<sData->total_points; i++) {
1730                                                                 MDeformVert *dv= &dvert[i];
1731                                                                 MDeformWeight *def_weight = defvert_find_index(dv, defgrp_index);
1732
1733                                                                 /* skip if weight value is 0 and no existing weight is found */
1734                                                                 if ((def_weight != NULL) || (weight[i] != 0.0f)) {
1735
1736                                                                         /* if not found, add a weight for it */
1737                                                                         if (def_weight == NULL) {
1738                                                                                 def_weight= defvert_verify_index(dv, defgrp_index);
1739                                                                         }
1740
1741                                                                         /* set weight value */
1742                                                                         def_weight->weight = weight[i];
1743                                                                 }
1744                                                         }
1745                                                 }
1746                                         }
1747                                         /* wave simulation */
1748                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
1749                                                 MVert *mvert = result->getVertArray(result);
1750                                                 int i;
1751                                                 PaintWavePoint* wPoint = (PaintWavePoint*)sData->type_data;
1752
1753                                                 #pragma omp parallel for schedule(static)
1754                                                 for (i=0; i<sData->total_points; i++) {
1755                                                         float normal[3];
1756                                                         normal_short_to_float_v3(normal, mvert[i].no);
1757                                                         madd_v3_v3fl(mvert[i].co, normal, wPoint[i].height);
1758                                                 }
1759                                                 update_normals = 1;
1760                                         }
1761
1762                                         /* displace */
1763                                         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
1764                                                 dynamicPaint_applySurfaceDisplace(surface, result);
1765                                                 update_normals = 1;
1766                                         }
1767                                 }
1768                         }
1769                 }
1770
1771                 if (update_normals)
1772                         CDDM_calc_normals(result);
1773         }
1774         /* make a copy of dm to use as brush data */
1775         if (pmd->brush) {
1776                 if (pmd->brush->dm) pmd->brush->dm->release(pmd->brush->dm);
1777                 pmd->brush->dm = CDDM_copy(result);
1778         }
1779
1780         return result;
1781 }
1782
1783 /* update cache frame range */
1784 void dynamicPaint_cacheUpdateFrames(DynamicPaintSurface *surface)
1785 {
1786         if (surface->pointcache) {
1787                 surface->pointcache->startframe = surface->start_frame;
1788                 surface->pointcache->endframe = surface->end_frame;
1789         }
1790 }
1791
1792 void canvas_copyDerivedMesh(DynamicPaintCanvasSettings *canvas, DerivedMesh *dm)
1793 {
1794         if (canvas->dm) canvas->dm->release(canvas->dm);
1795         canvas->dm = CDDM_copy(dm);
1796 }
1797
1798 /*
1799 *       Updates derived mesh copy and processes dynamic paint step / caches.
1800 */
1801 static void dynamicPaint_frameUpdate(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1802 {
1803         if(pmd->canvas) {
1804                 DynamicPaintCanvasSettings *canvas = pmd->canvas;
1805                 DynamicPaintSurface *surface = canvas->surfaces.first;
1806
1807                 /* update derived mesh copy */
1808                 canvas_copyDerivedMesh(canvas, dm);
1809
1810                 /* in case image sequence baking, stop here */
1811                 if (canvas->flags & MOD_DPAINT_BAKING) return;
1812
1813                 /* loop through surfaces */
1814                 for (; surface; surface=surface->next) {
1815                         int current_frame = (int)scene->r.cfra;
1816
1817                         /* free bake data if not required anymore */
1818                         surface_freeUnusedData(surface);
1819
1820                         /* image sequences are handled by bake operator */
1821                         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) continue;
1822                         if (!(surface->flags & MOD_DPAINT_ACTIVE)) continue;
1823
1824                         /* make sure surface is valid */
1825                         if (!dynamicPaint_checkSurfaceData(surface)) continue;
1826
1827                         /* limit frame range */
1828                         CLAMP(current_frame, surface->start_frame, surface->end_frame);
1829
1830                         if (current_frame != surface->current_frame || (int)scene->r.cfra == surface->start_frame) {
1831                                 PointCache *cache = surface->pointcache;
1832                                 PTCacheID pid;
1833                                 surface->current_frame = current_frame;
1834
1835                                 /* read point cache */
1836                                 BKE_ptcache_id_from_dynamicpaint(&pid, ob, surface);
1837                                 pid.cache->startframe = surface->start_frame;
1838                                 pid.cache->endframe = surface->end_frame;
1839                                 BKE_ptcache_id_time(&pid, scene, (float)scene->r.cfra, NULL, NULL, NULL);
1840
1841                                 /* reset non-baked cache at first frame */
1842                                 if((int)scene->r.cfra == surface->start_frame && !(cache->flag & PTCACHE_BAKED))
1843                                 {
1844                                         cache->flag |= PTCACHE_REDO_NEEDED;
1845                                         BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
1846                                         cache->flag &= ~PTCACHE_REDO_NEEDED;
1847                                 }
1848
1849                                 /* try to read from cache */
1850                                 if(BKE_ptcache_read(&pid, (float)scene->r.cfra)) {
1851                                         BKE_ptcache_validate(cache, (int)scene->r.cfra);
1852                                 }
1853                                 /* if read failed and we're on surface range do recalculate */
1854                                 else if ((int)scene->r.cfra == current_frame
1855                                         && !(cache->flag & PTCACHE_BAKED)) {
1856                                         /* calculate surface frame */
1857                                         canvas->flags |= MOD_DPAINT_BAKING;
1858                                         dynamicPaint_calculateFrame(surface, scene, ob, current_frame);
1859                                         canvas->flags &= ~MOD_DPAINT_BAKING;
1860
1861                                         /* restore canvas derivedmesh if required */
1862                                         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE &&
1863                                                 surface->flags & MOD_DPAINT_DISP_INCREMENTAL && surface->next)
1864                                                 canvas_copyDerivedMesh(canvas, dm);
1865
1866                                         BKE_ptcache_validate(cache, surface->current_frame);
1867                                         BKE_ptcache_write(&pid, surface->current_frame);
1868                                 }
1869                         }
1870                 }
1871         }
1872 }
1873
1874 /* Modifier call. Processes dynamic paint modifier step. */
1875 struct DerivedMesh *dynamicPaint_Modifier_do(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1876 {       
1877         /* For now generate tessfaces in every case
1878         *  XXX - move/remove when most of dpaint functions are converted to use bmesh types */
1879         DM_ensure_tessface(dm);
1880
1881         /* Update canvas data for a new frame */
1882         dynamicPaint_frameUpdate(pmd, scene, ob, dm);
1883
1884         /* Return output mesh */
1885         return dynamicPaint_Modifier_apply(pmd, ob, dm);
1886 }
1887
1888
1889 /***************************** Image Sequence / UV Image Surface Calls ******************************/
1890
1891 /*
1892 *       Tries to find the neighboring pixel in given (uv space) direction.
1893 *       Result is used by effect system to move paint on the surface.
1894 *
1895 *   px,py : origin pixel x and y
1896 *       n_index : lookup direction index (use neighX,neighY to get final index)
1897 */
1898 static int dynamicPaint_findNeighbourPixel(PaintUVPoint *tempPoints, DerivedMesh *dm,
1899                                            const char *uvname, int w, int h, int px, int py, int n_index)
1900 {
1901         /* Note: Current method only uses polygon edges to detect neighboring pixels.
1902         *  -> It doesn't always lead to the optimum pixel but is accurate enough
1903         *  and faster/simplier than including possible face tip point links)
1904         */
1905
1906         int x,y;
1907         PaintUVPoint *tPoint = NULL;
1908         PaintUVPoint *cPoint = NULL;
1909
1910         /* shift position by given n_index */
1911         x = px + neighX[n_index];
1912         y = py + neighY[n_index];
1913
1914         if (x<0 || x>=w) return OUT_OF_TEXTURE;
1915         if (y<0 || y>=h) return OUT_OF_TEXTURE;
1916
1917         tPoint = &tempPoints[x+w*y];            /* UV neighbor */
1918         cPoint = &tempPoints[px+w*py];          /* Origin point */
1919
1920         /*
1921         *       Check if shifted point is on same face -> it's a correct neighbor
1922         *   (and if it isn't marked as an "edge pixel")
1923         */
1924         if ((tPoint->face_index == cPoint->face_index) && (tPoint->neighbour_pixel == -1))
1925                 return (x+w*y);
1926
1927         /*
1928         *       Even if shifted point is on another face
1929         *       -> use this point.
1930         *       
1931         *       !! Replace with "is uv faces linked" check !!
1932         *       This should work fine as long as uv island
1933         *       margin is > 1 pixel.
1934         */
1935         if ((tPoint->face_index != -1) && (tPoint->neighbour_pixel == -1)) {
1936                 return (x+w*y);
1937         }
1938
1939         /*
1940         *       If we get here, the actual neighboring pixel
1941         *       is located on a non-linked uv face, and we have to find
1942         *       it's "real" position.
1943         *
1944         *       Simple neighboring face finding algorithm:
1945         *       - find closest uv edge to shifted pixel and get
1946         *         the another face that shares that edge
1947         *       - find corresponding position of that new face edge
1948         *         in uv space
1949         *
1950         *       TODO: Implement something more accurate / optimized?
1951         */
1952         {
1953                 int numOfFaces = dm->getNumTessFaces(dm);
1954                 MFace *mface = dm->getTessFaceArray(dm);
1955                 MTFace *tface =  CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1956
1957                 /* Get closest edge to that subpixel on UV map  */
1958                 {
1959                         float pixel[2], dist, t_dist;
1960                         int i, uindex[3], edge1_index, edge2_index,
1961                                 e1_index, e2_index, target_face;
1962                         float closest_point[2], lambda, dir_vec[2];
1963                         int target_uv1, target_uv2, final_pixel[2], final_index;
1964
1965                         float *s_uv1, *s_uv2, *t_uv1, *t_uv2;
1966
1967                         pixel[0] = ((float)(px + neighX[n_index]) + 0.5f) / (float)w;
1968                         pixel[1] = ((float)(py + neighY[n_index]) + 0.5f) / (float)h;
1969
1970                         /* Get uv indexes for current face part */
1971                         if (cPoint->quad) {
1972                                 uindex[0] = 0; uindex[1] = 2; uindex[2] = 3;
1973                         }
1974                         else {
1975                                 uindex[0] = 0; uindex[1] = 1; uindex[2] = 2;
1976                         }
1977
1978                         /*
1979                         *       Find closest edge to that pixel
1980                         */
1981                         /* Dist to first edge   */
1982                         e1_index = cPoint->v1; e2_index = cPoint->v2; edge1_index = uindex[0]; edge2_index = uindex[1];
1983                         dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
1984
1985                         /* Dist to second edge  */
1986                         t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[1]], tface[cPoint->face_index].uv[uindex[2]]);
1987                         if (t_dist < dist) {e1_index = cPoint->v2; e2_index = cPoint->v3; edge1_index = uindex[1]; edge2_index = uindex[2]; dist = t_dist;}
1988
1989                         /* Dist to third edge   */
1990                         t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[2]], tface[cPoint->face_index].uv[uindex[0]]);
1991                         if (t_dist < dist) {e1_index = cPoint->v3; e2_index = cPoint->v1;  edge1_index = uindex[2]; edge2_index = uindex[0]; dist = t_dist;}
1992
1993
1994                         /*
1995                         *       Now find another face that is linked to that edge
1996                         */
1997                         target_face = -1;
1998
1999                         for (i=0; i<numOfFaces; i++) {
2000                                 /*
2001                                 *       Check if both edge vertices share this face
2002                                 */
2003                                 int v4 = (mface[i].v4) ? mface[i].v4 : -1;
2004
2005                                 if ((e1_index == mface[i].v1 || e1_index == mface[i].v2 || e1_index == mface[i].v3 || e1_index == v4) &&
2006                                         (e2_index == mface[i].v1 || e2_index == mface[i].v2 || e2_index == mface[i].v3 || e2_index == v4)) {
2007                                         if (i == cPoint->face_index) continue;
2008
2009                                         target_face = i;
2010
2011                                         /*
2012                                         *       Get edge UV index
2013                                         */
2014                                         if (e1_index == mface[i].v1) target_uv1 = 0;
2015                                         else if (e1_index == mface[i].v2) target_uv1 = 1;
2016                                         else if (e1_index == mface[i].v3) target_uv1 = 2;
2017                                         else target_uv1 = 3;
2018
2019                                         if (e2_index == mface[i].v1) target_uv2 = 0;
2020                                         else if (e2_index == mface[i].v2) target_uv2 = 1;
2021                                         else if (e2_index == mface[i].v3) target_uv2 = 2;
2022                                         else target_uv2 = 3;
2023
2024                                         break;
2025                                 }
2026                         }
2027
2028                         /* If none found pixel is on mesh edge  */
2029                         if (target_face == -1) return ON_MESH_EDGE;
2030
2031                         /*
2032                         *       If target face is connected in UV space as well, just use original index
2033                         */
2034                         s_uv1 = (float *)tface[cPoint->face_index].uv[edge1_index];
2035                         s_uv2 = (float *)tface[cPoint->face_index].uv[edge2_index];
2036                         t_uv1 = (float *)tface[target_face].uv[target_uv1];
2037                         t_uv2 = (float *)tface[target_face].uv[target_uv2];
2038
2039                         //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]);
2040
2041                         if (((s_uv1[0] == t_uv1[0] && s_uv1[1] == t_uv1[1]) &&
2042                                  (s_uv2[0] == t_uv2[0] && s_uv2[1] == t_uv2[1]) ) ||
2043                                 ((s_uv2[0] == t_uv1[0] && s_uv2[1] == t_uv1[1]) &&
2044                                  (s_uv1[0] == t_uv2[0] && s_uv1[1] == t_uv2[1]) )) return ((px+neighX[n_index]) + w*(py+neighY[n_index]));
2045
2046                         /*
2047                         *       Find a point that is relatively at same edge position
2048                         *       on this other face UV
2049                         */
2050                         lambda = closest_to_line_v2(closest_point, pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
2051                         if (lambda < 0.0f) lambda = 0.0f;
2052                         if (lambda > 1.0f) lambda = 1.0f;
2053
2054                         sub_v2_v2v2(dir_vec, tface[target_face].uv[target_uv2], tface[target_face].uv[target_uv1]);
2055
2056                         mul_v2_fl(dir_vec, lambda);
2057
2058                         copy_v2_v2(pixel, tface[target_face].uv[target_uv1]);
2059                         add_v2_v2(pixel, dir_vec);
2060                         pixel[0] = (pixel[0] * (float)w) - 0.5f;
2061                         pixel[1] = (pixel[1] * (float)h) - 0.5f;
2062
2063                         final_pixel[0] = (int)floor(pixel[0]);
2064                         final_pixel[1] = (int)floor(pixel[1]);
2065
2066                         /* If current pixel uv is outside of texture    */
2067                         if (final_pixel[0] < 0 || final_pixel[0] >= w) return OUT_OF_TEXTURE;
2068                         if (final_pixel[1] < 0 || final_pixel[1] >= h) return OUT_OF_TEXTURE;
2069
2070                         final_index = final_pixel[0] + w * final_pixel[1];
2071
2072                         /* If we ended up to our origin point ( mesh has smaller than pixel sized faces)        */
2073                         if (final_index == (px+w*py)) return NOT_FOUND;
2074                         /* If found pixel still lies on wrong face ( mesh has smaller than pixel sized faces)   */
2075                         if (tempPoints[final_index].face_index != target_face) return NOT_FOUND;
2076
2077                         /*
2078                         *       If final point is an "edge pixel", use it's "real" neighbor instead
2079                         */
2080                         if (tempPoints[final_index].neighbour_pixel != -1) final_index = cPoint->neighbour_pixel;
2081
2082                         return final_index;
2083                 }
2084         }
2085 }
2086
2087 /*
2088 *       Create a surface for uv image sequence format
2089 */
2090 int dynamicPaint_createUVSurface(DynamicPaintSurface *surface)
2091 {
2092         /* Antialias jitter point relative coords       */
2093         float jitter5sample[10] =  {0.0f, 0.0f,
2094                                                         -0.2f, -0.4f,
2095                                                         0.2f, 0.4f,
2096                                                         0.4f, -0.2f,
2097                                                         -0.4f, 0.3f};
2098         int ty;
2099         int w,h;
2100         int numOfFaces;
2101         char uvname[MAX_CUSTOMDATA_LAYER_NAME];
2102         int active_points = 0;
2103         int error = 0;
2104
2105         PaintSurfaceData *sData;
2106         DynamicPaintCanvasSettings *canvas = surface->canvas;
2107         DerivedMesh *dm = canvas->dm;
2108
2109         PaintUVPoint *tempPoints = NULL;
2110         Vec3f *tempWeights = NULL;
2111         MFace *mface = NULL;
2112         MTFace *tface = NULL;
2113         Bounds2D *faceBB = NULL;
2114         int *final_index;
2115         int aa_samples;
2116
2117         if (!dm) return setError(canvas, "Canvas mesh not updated.");
2118         if (surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ) return setError(canvas, "Can't bake non-\"image sequence\" formats.");
2119
2120         numOfFaces = dm->getNumTessFaces(dm);
2121         mface = dm->getTessFaceArray(dm);
2122
2123         /* get uv map */
2124         CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->uvlayer_name, uvname);
2125         tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
2126
2127         /* Check for validity   */
2128         if (!tface) return setError(canvas, "No UV data on canvas.");
2129         if (surface->image_resolution < 16 || surface->image_resolution > 8192) return setError(canvas, "Invalid resolution.");
2130
2131         w = h = surface->image_resolution;
2132
2133         /*
2134         *       Start generating the surface
2135         */
2136         printf("DynamicPaint: Preparing UV surface of %ix%i pixels and %i faces.\n", w, h, numOfFaces);
2137
2138         /* Init data struct */
2139         if (surface->data) dynamicPaint_freeSurfaceData(surface);
2140         sData = surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
2141         if (!surface->data) return setError(canvas, "Not enough free memory.");
2142
2143         aa_samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
2144         tempPoints = (struct PaintUVPoint *) MEM_callocN(w*h*sizeof(struct PaintUVPoint), "Temp PaintUVPoint");
2145         if (!tempPoints) error=1;
2146
2147         final_index = (int *) MEM_callocN(w*h*sizeof(int), "Temp UV Final Indexes");
2148         if (!final_index) error=1;
2149
2150         tempWeights = (struct Vec3f *) MEM_mallocN(w*h*aa_samples*sizeof(struct Vec3f), "Temp bWeights");
2151         if (!tempWeights) error=1;
2152
2153         /*
2154         *       Generate a temporary bounding box array for UV faces to optimize
2155         *       the pixel-inside-a-face search.
2156         */
2157         if (!error) {
2158                 faceBB = (struct Bounds2D *) MEM_mallocN(numOfFaces*sizeof(struct Bounds2D), "MPCanvasFaceBB");
2159                 if (!faceBB) error=1;
2160         }
2161
2162         if (!error)
2163         for (ty=0; ty<numOfFaces; ty++) {
2164                 int numOfVert = (mface[ty].v4) ? 4 : 3;
2165                 int i;
2166
2167                 copy_v2_v2(faceBB[ty].min, tface[ty].uv[0]);
2168                 copy_v2_v2(faceBB[ty].max, tface[ty].uv[0]);
2169
2170                 for (i = 1; i<numOfVert; i++) {
2171                         if (tface[ty].uv[i][0] < faceBB[ty].min[0]) faceBB[ty].min[0] = tface[ty].uv[i][0];
2172                         if (tface[ty].uv[i][1] < faceBB[ty].min[1]) faceBB[ty].min[1] = tface[ty].uv[i][1];
2173                         if (tface[ty].uv[i][0] > faceBB[ty].max[0]) faceBB[ty].max[0] = tface[ty].uv[i][0];
2174                         if (tface[ty].uv[i][1] > faceBB[ty].max[1]) faceBB[ty].max[1] = tface[ty].uv[i][1];
2175
2176                 }
2177         }
2178
2179         /*
2180         *       Loop through every pixel and check
2181         *       if pixel is uv-mapped on a canvas face.
2182         */
2183         if (!error) {
2184                 #pragma omp parallel for schedule(static)
2185                 for (ty = 0; ty < h; ty++)
2186                 {
2187                         int tx;
2188                         for (tx = 0; tx < w; tx++)
2189                         {
2190                                 int i, sample;
2191                                 int index = tx+w*ty;
2192                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2193
2194                                 short isInside = 0;     /* if point is inside a uv face */
2195
2196                                 float d1[2], d2[2], d3[2], point[5][2];
2197                                 float dot00,dot01,dot02,dot11,dot12, invDenom, u,v;
2198
2199                                 /* Init per pixel settings */
2200                                 tPoint->face_index = -1;
2201                                 tPoint->neighbour_pixel = -1;
2202                                 tPoint->pixel_index = index;
2203
2204                                 /* Actual pixel center, used when collision is found    */
2205                                 point[0][0] = ((float)tx + 0.5f) / w;
2206                                 point[0][1] = ((float)ty + 0.5f) / h;
2207
2208                                 /*
2209                                 * A pixel middle sample isn't enough to find very narrow polygons
2210                                 * So using 4 samples of each corner too
2211                                 */
2212                                 point[1][0] = ((float)tx) / w;
2213                                 point[1][1] = ((float)ty) / h;
2214
2215                                 point[2][0] = ((float)tx+1) / w;
2216                                 point[2][1] = ((float)ty) / h;
2217
2218                                 point[3][0] = ((float)tx) / w;
2219                                 point[3][1] = ((float)ty+1) / h;
2220
2221                                 point[4][0] = ((float)tx+1) / w;
2222                                 point[4][1] = ((float)ty+1) / h;
2223
2224
2225                                 /* Loop through samples, starting from middle point     */
2226                                 for (sample=0; sample<5; sample++) {
2227                                         
2228                                         /* Loop through every face in the mesh  */
2229                                         for (i=0; i<numOfFaces; i++) {
2230
2231                                                 /* Check uv bb  */
2232                                                 if (faceBB[i].min[0] > (point[sample][0])) continue;
2233                                                 if (faceBB[i].min[1] > (point[sample][1])) continue;
2234                                                 if (faceBB[i].max[0] < (point[sample][0])) continue;
2235                                                 if (faceBB[i].max[1] < (point[sample][1])) continue;
2236
2237                                                 /*  Calculate point inside a triangle check
2238                                                 *       for uv0,1,2 */
2239                                                 sub_v2_v2v2(d1,  tface[i].uv[2], tface[i].uv[0]);       // uv2 - uv0
2240                                                 sub_v2_v2v2(d2,  tface[i].uv[1], tface[i].uv[0]);       // uv1 - uv0
2241                                                 sub_v2_v2v2(d3,  point[sample], tface[i].uv[0]);        // point - uv0
2242
2243                                                 dot00 = d1[0]*d1[0] + d1[1]*d1[1];
2244                                                 dot01 = d1[0]*d2[0] + d1[1]*d2[1];
2245                                                 dot02 = d1[0]*d3[0] + d1[1]*d3[1];
2246                                                 dot11 = d2[0]*d2[0] + d2[1]*d2[1];
2247                                                 dot12 = d2[0]*d3[0] + d2[1]*d3[1];
2248
2249                                                 invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
2250                                                 u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2251                                                 v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2252
2253                                                 if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=1;} /* is inside a triangle */
2254
2255                                                 /*  If collision wasn't found but the face is a quad
2256                                                 *       do another check for the second half */
2257                                                 if ((!isInside) && mface[i].v4)
2258                                                 {
2259
2260                                                         /* change d2 to test the other half     */
2261                                                         sub_v2_v2v2(d2,  tface[i].uv[3], tface[i].uv[0]);       // uv3 - uv0
2262
2263                                                         /* test again   */
2264                                                         dot00 = d1[0]*d1[0] + d1[1]*d1[1];
2265                                                         dot01 = d1[0]*d2[0] + d1[1]*d2[1];
2266                                                         dot02 = d1[0]*d3[0] + d1[1]*d3[1];
2267                                                         dot11 = d2[0]*d2[0] + d2[1]*d2[1];
2268                                                         dot12 = d2[0]*d3[0] + d2[1]*d3[1];
2269
2270                                                         invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
2271                                                         u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2272                                                         v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2273
2274                                                         if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=2;} /* is inside the second half of the quad */
2275
2276                                                 }
2277
2278                                                 /*
2279                                                 *       If point was inside the face
2280                                                 */
2281                                                 if (isInside != 0) {
2282
2283                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2284                                                         int j;
2285
2286                                                         /* Get triagnle uvs     */
2287                                                         if (isInside==1) {
2288                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2289                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2290                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2291                                                         }
2292                                                         else {
2293                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2294                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2295                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2296                                                         }
2297
2298                                                         /* Add b-weights per anti-aliasing sample       */
2299                                                         for (j=0; j<aa_samples; j++) {
2300                                                                 uv[0] = point[0][0] + jitter5sample[j*2] / w;
2301                                                                 uv[1] = point[0][1] + jitter5sample[j*2+1] / h;
2302
2303                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v);
2304                                                         }
2305
2306                                                         /* Set surface point face values        */
2307                                                         tPoint->face_index = i;                                                 /* face index */
2308                                                         tPoint->quad = (isInside == 2) ? 1 : 0;         /* quad or tri part*/
2309
2310                                                         /* save vertex indexes  */
2311                                                         tPoint->v1 = mface[i].v1;
2312                                                         tPoint->v2 = (isInside == 2) ? mface[i].v3 : mface[i].v2;
2313                                                         tPoint->v3 = (isInside == 2) ? mface[i].v4 : mface[i].v3;
2314
2315                                                         sample = 5;     /* make sure we exit sample loop as well */
2316                                                         break;
2317                                                 }
2318                                         }
2319                                 } /* sample loop */
2320                         }
2321                 }
2322
2323                 /*
2324                 *       Now loop through every pixel that was left without index
2325                 *       and find if they have neighboring pixels that have an index.
2326                 *       If so use that polygon as pixel surface.
2327                 *       (To avoid seams on uv island edges)
2328                 */
2329                 #pragma omp parallel for schedule(static)
2330                 for (ty = 0; ty < h; ty++)
2331                 {
2332                         int tx;
2333                         for (tx = 0; tx < w; tx++)
2334                         {
2335                                 int index = tx+w*ty;
2336                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2337
2338                                 /* If point isnt't on canvas mesh       */
2339                                 if (tPoint->face_index == -1) {
2340                                         int u_min, u_max, v_min, v_max;
2341                                         int u,v, ind;
2342                                         float point[2];
2343
2344                                         /* get loop area        */
2345                                         u_min = (tx > 0) ? -1 : 0;
2346                                         u_max = (tx < (w-1)) ? 1 : 0;
2347                                         v_min = (ty > 0) ? -1 : 0;
2348                                         v_max = (ty < (h-1)) ? 1 : 0;
2349
2350                                         point[0] = ((float)tx + 0.5f) / w;
2351                                         point[1] = ((float)ty + 0.5f) / h;
2352
2353                                         /* search through defined area for neighbor     */
2354                                         for (u=u_min; u<=u_max; u++)
2355                                                 for (v=v_min; v<=v_max; v++) {
2356                                                         /* if not this pixel itself     */
2357                                                         if (u!=0 || v!=0) {
2358                                                                 ind = (tx+u)+w*(ty+v);
2359
2360                                                                 /* if neighbor has index        */
2361                                                                 if (tempPoints[ind].face_index != -1) {
2362
2363                                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2364                                                                         int i = tempPoints[ind].face_index, j;
2365
2366                                                                         /* Now calculate pixel data for this pixel as it was on polygon surface */
2367                                                                         if (!tempPoints[ind].quad) {
2368                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2369                                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2370                                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2371                                                                         }
2372                                                                         else {
2373                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2374                                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2375                                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2376                                                                         }
2377
2378                                                                         /* Add b-weights per anti-aliasing sample       */
2379                                                                         for (j=0; j<aa_samples; j++) {
2380
2381                                                                                 uv[0] = point[0] + jitter5sample[j*2] / w;
2382                                                                                 uv[1] = point[1] + jitter5sample[j*2+1] / h;
2383                                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v);
2384                                                                         }
2385
2386                                                                         /* Set values   */
2387                                                                         tPoint->neighbour_pixel = ind;                          // face index
2388                                                                         tPoint->quad = tempPoints[ind].quad;            // quad or tri
2389
2390                                                                         /* save vertex indexes  */
2391                                                                         tPoint->v1 = mface[i].v1;
2392                                                                         tPoint->v2 = (tPoint->quad) ? mface[i].v3 : mface[i].v2;
2393                                                                         tPoint->v3 = (tPoint->quad) ? mface[i].v4 : mface[i].v3;
2394
2395                                                                         u = u_max + 1;  /* make sure we exit outer loop as well */
2396                                                                         break;
2397                                                                 }
2398                                                 }
2399                                         }
2400                                 }
2401                         }
2402                 }
2403
2404                 /*
2405                 *       When base loop is over convert found neighbor indexes to real ones
2406                 *       Also count the final number of active surface points
2407                 */
2408                 for (ty = 0; ty < h; ty++)
2409                 {
2410                         int tx;
2411                         for (tx = 0; tx < w; tx++)
2412                         {
2413                                 int index = tx+w*ty;
2414                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2415
2416                                 if (tPoint->face_index == -1 && tPoint->neighbour_pixel != -1) tPoint->face_index = tempPoints[tPoint->neighbour_pixel].face_index;
2417                                 if (tPoint->face_index != -1) active_points++;
2418                         }
2419                 }
2420
2421                 /*      Generate surface adjacency data. */
2422                 {
2423                         int i, cursor=0;
2424
2425                         /* Create a temporary array of final indexes (before unassigned
2426                         *  pixels have been dropped) */
2427                         for (i=0; i<w*h; i++) {
2428                                 if (tempPoints[i].face_index != -1) {
2429                                         final_index[i] = cursor;
2430                                         cursor++;
2431                                 }
2432                         }
2433                         /* allocate memory */
2434                         sData->total_points = w*h;
2435                         dynamicPaint_initAdjacencyData(surface, 1);
2436
2437                         if (sData->adj_data) {
2438                                 PaintAdjData *ed = sData->adj_data;
2439                                 unsigned int n_pos = 0;
2440                                 for (ty = 0; ty < h; ty++)
2441                                 {
2442                                         int tx;
2443                                         for (tx = 0; tx < w; tx++)
2444                                         {
2445                                                 int i, index = tx+w*ty;
2446
2447                                                 if (tempPoints[index].face_index != -1) {
2448                                                         ed->n_index[final_index[index]] = n_pos;
2449                                                         ed->n_num[final_index[index]] = 0;
2450
2451                                                         for (i=0; i<8; i++) {
2452
2453                                                                 /* Try to find a neighboring pixel in defined direction
2454                                                                 *  If not found, -1 is returned */
2455                                                                 int n_target = dynamicPaint_findNeighbourPixel(tempPoints, dm, uvname, w, h, tx, ty, i);
2456
2457                                                                 if (n_target >= 0) {
2458                                                                         ed->n_target[n_pos] = final_index[n_target];
2459                                                                         ed->n_num[final_index[index]]++;
2460                                                                         n_pos++;
2461                                                                 }
2462                                                                 else if (n_target == ON_MESH_EDGE || n_target == OUT_OF_TEXTURE) {
2463                                                                         ed->flags[final_index[index]] |= ADJ_ON_MESH_EDGE;
2464                                                                 }
2465                                                         }
2466                                                 }
2467                                         }
2468                                 }
2469                         }
2470                 }
2471
2472                 /* Create final surface data without inactive points */
2473                 {
2474                         ImgSeqFormatData *f_data = MEM_callocN(sizeof(struct ImgSeqFormatData), "ImgSeqFormatData");
2475                         if (f_data) {
2476                                 f_data->uv_p = MEM_callocN(active_points*sizeof(struct PaintUVPoint), "PaintUVPoint");
2477                                 f_data->barycentricWeights = MEM_callocN(active_points*aa_samples*sizeof(struct Vec3f), "PaintUVPoint");
2478
2479                                 if (!f_data->uv_p || !f_data->barycentricWeights) error=1;
2480                         }
2481                         else error=1;
2482
2483                         sData->total_points = active_points;
2484                         
2485                         /* in case of allocation error, free everything */
2486                         if (error) {
2487                                 if (f_data) {
2488                                         if (f_data->uv_p) MEM_freeN(f_data->uv_p);
2489                                         if (f_data->barycentricWeights) MEM_freeN(f_data->barycentricWeights);
2490                                         MEM_freeN(f_data);
2491                                 }
2492                         }
2493                         else {
2494                                 int index, cursor = 0;
2495                                 sData->total_points = active_points;
2496                                 sData->format_data = f_data;
2497
2498                                 for(index = 0; index < (w*h); index++) {
2499                                         if (tempPoints[index].face_index != -1) {
2500                                                 memcpy(&f_data->uv_p[cursor], &tempPoints[index], sizeof(PaintUVPoint));
2501                                                 memcpy(&f_data->barycentricWeights[cursor*aa_samples], &tempWeights[index*aa_samples], sizeof(Vec3f)*aa_samples);
2502                                                 cursor++;
2503                                         }
2504                                 }
2505                         }
2506                 }
2507         }
2508         if (error==1) setError(canvas, "Not enough free memory.");
2509
2510         if (faceBB) MEM_freeN(faceBB);
2511         if (tempPoints) MEM_freeN(tempPoints);
2512         if (tempWeights) MEM_freeN(tempWeights);
2513         if (final_index) MEM_freeN(final_index);
2514
2515         /* Init surface type data */
2516         if (!error) {
2517                 dynamicPaint_allocateSurfaceType(surface);
2518
2519 #if 0
2520                 /*  -----------------------------------------------------------------
2521                 *       For debug, output pixel statuses to the color map
2522                 *       -----------------------------------------------------------------*/
2523                 #pragma omp parallel for schedule(static)
2524                 for (index = 0; index < sData->total_points; index++)
2525                 {
2526                         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
2527                         PaintUVPoint *uvPoint = &((PaintUVPoint*)f_data->uv_p)[index];
2528                         PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index];
2529                         pPoint->alpha=1.0f;
2530
2531                         /* Every pixel that is assigned as "edge pixel" gets blue color */
2532                         if (uvPoint->neighbour_pixel != -1) pPoint->color[2] = 1.0f;
2533                         /* and every pixel that finally got an polygon gets red color   */
2534                         if (uvPoint->face_index != -1) pPoint->color[0] = 1.0f;
2535                         /* green color shows pixel face index hash      */
2536                         if (uvPoint->face_index != -1) pPoint->color[1] = (float)(uvPoint->face_index % 255)/256.0f;
2537                 }
2538
2539 #endif
2540                 dynamicPaint_setInitialColor(surface);
2541         }
2542
2543         return (error == 0);
2544 }
2545
2546 /*
2547 *       Outputs an image file from uv surface data.
2548 */
2549 void dynamicPaint_outputSurfaceImage(DynamicPaintSurface *surface, char* filename, short output_layer)
2550 {
2551         int index;
2552         ImBuf* ibuf = NULL;
2553         PaintSurfaceData *sData = surface->data;
2554         ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data;
2555         /* OpenEXR or PNG       */
2556         int format = (surface->image_fileformat & MOD_DPAINT_IMGFORMAT_OPENEXR) ? R_IMF_IMTYPE_OPENEXR : R_IMF_IMTYPE_PNG;
2557         char output_file[FILE_MAX];
2558
2559         if (!sData || !sData->type_data) {setError(surface->canvas, "Image save failed: Invalid surface.");return;}
2560         /* if selected format is openexr, but current build doesnt support one */
2561         #ifndef WITH_OPENEXR
2562         if (format == R_IMF_IMTYPE_OPENEXR) format = R_IMF_IMTYPE_PNG;
2563         #endif
2564         BLI_strncpy(output_file, filename, sizeof(output_file));
2565         BKE_add_image_extension(output_file, format);
2566
2567         /* Validate output file path    */
2568         BLI_path_abs(output_file, G.main->name);
2569         BLI_make_existing_file(output_file);
2570
2571         /* Init image buffer    */
2572         ibuf = IMB_allocImBuf(surface->image_resolution, surface->image_resolution, 32, IB_rectfloat);
2573         if (ibuf == NULL) {setError(surface->canvas, "Image save failed: Not enough free memory.");return;}
2574
2575         #pragma omp parallel for schedule(static)
2576         for (index = 0; index < sData->total_points; index++)
2577         {
2578                 int pos=f_data->uv_p[index].pixel_index*4;      /* image buffer position */
2579
2580                 /* Set values of preferred type */
2581                 if (output_layer == 1) {
2582                         /* wetmap */
2583                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2584                                 PaintPoint *point = &((PaintPoint*)sData->type_data)[index];
2585                                 float value = (point->wetness > 1.0f) ? 1.0f : point->wetness;
2586
2587                                 ibuf->rect_float[pos]=value;
2588                                 ibuf->rect_float[pos+1]=value;
2589                                 ibuf->rect_float[pos+2]=value;
2590                                 ibuf->rect_float[pos+3]=1.0f;
2591                         }
2592                 }
2593                 else if (output_layer == 0) {
2594                         /* Paintmap */
2595                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2596                                 PaintPoint *point = &((PaintPoint*)sData->type_data)[index];
2597
2598                                 /* blend wet and dry layers */
2599                                 blendColors(point->color, point->alpha, point->e_color, point->e_alpha, &ibuf->rect_float[pos]);
2600
2601                                 /* Multiply color by alpha if enabled   */
2602                                 if (surface->flags & MOD_DPAINT_MULALPHA) {
2603                                         ibuf->rect_float[pos]   *= ibuf->rect_float[pos+3];
2604                                         ibuf->rect_float[pos+1] *= ibuf->rect_float[pos+3];
2605                                         ibuf->rect_float[pos+2] *= ibuf->rect_float[pos+3];
2606                                 }
2607                         }
2608                         /* displace */
2609                         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
2610                                 float depth = ((float*)sData->type_data)[index];
2611                                 if (surface->depth_clamp)
2612                                         depth /= surface->depth_clamp;
2613
2614                                 if (surface->disp_type == MOD_DPAINT_DISP_DISPLACE) {
2615                                         depth = (0.5f - depth/2.0f);
2616                                 }
2617
2618                                 CLAMP(depth, 0.0f, 1.0f);
2619
2620                                 ibuf->rect_float[pos]=depth;
2621                                 ibuf->rect_float[pos+1]=depth;
2622                                 ibuf->rect_float[pos+2]=depth;
2623                                 ibuf->rect_float[pos+3]=1.0f;
2624                         }
2625                         /* waves */
2626                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
2627                                 PaintWavePoint *wPoint = &((PaintWavePoint*)sData->type_data)[index];
2628                                 float depth = wPoint->height;
2629                                 if (surface->depth_clamp)
2630                                                 depth /= surface->depth_clamp;
2631                                 depth = (0.5f + depth/2.0f);
2632                                 CLAMP(depth, 0.0f, 1.0f);
2633
2634                                 ibuf->rect_float[pos]=depth;
2635                                 ibuf->rect_float[pos+1]=depth;
2636                                 ibuf->rect_float[pos+2]=depth;
2637                                 ibuf->rect_float[pos+3]=1.0f;
2638                         }
2639                 }
2640         }
2641
2642         /* Set output format, png in case exr isnt supported */
2643         ibuf->ftype= PNG|95;
2644 #ifdef WITH_OPENEXR
2645         if (format == R_IMF_IMTYPE_OPENEXR) {   /* OpenEXR 32-bit float */
2646                 ibuf->ftype = OPENEXR | OPENEXR_COMPRESS;
2647         }
2648 #endif
2649
2650         /* Save image */
2651         IMB_saveiff(ibuf, output_file, IB_rectfloat);
2652         IMB_freeImBuf(ibuf);
2653 }
2654
2655
2656 /***************************** Material / Texture Sampling ******************************/
2657
2658 /* stores a copy of required materials to allow doing adjustments
2659 *  without interfering the render/preview */
2660 typedef struct BrushMaterials {
2661         Material *mat;
2662         Material **ob_mats;
2663         int tot;
2664 } BrushMaterials;
2665
2666 /* Initialize materials for brush object:
2667 *  Calculates inverse matrices for linked objects, updates
2668 *  volume caches etc. */
2669 static void dynamicPaint_updateBrushMaterials(Object *brushOb, Material *ui_mat, Scene *scene, BrushMaterials *bMats)
2670 {
2671         /* Calculate inverse transformation matrix
2672         *  for this object */
2673         invert_m4_m4(brushOb->imat, brushOb->obmat);
2674         copy_m4_m4(brushOb->imat_ren, brushOb->imat);
2675
2676         /* Now process every material linked to this brush object */
2677         if ((ui_mat == NULL) && brushOb->mat && brushOb->totcol) {
2678                 int i, tot=(*give_totcolp(brushOb));
2679
2680                 /* allocate material pointer array */
2681                 if (tot) {
2682                         bMats->ob_mats = MEM_callocN(sizeof(Material*)*(tot), "BrushMaterials");
2683                         for (i=0; i<tot; i++) {
2684                                 bMats->ob_mats[i] = RE_init_sample_material(give_current_material(brushOb,(i+1)), scene);
2685                         }
2686                 }
2687                 bMats->tot = tot;
2688         }
2689         else {
2690                 bMats->mat = RE_init_sample_material(ui_mat, scene);
2691         }
2692 }
2693
2694 /* free all data allocated by dynamicPaint_updateBrushMaterials() */
2695 static void dynamicPaint_freeBrushMaterials(BrushMaterials *bMats)
2696 {
2697         /* Now process every material linked to this brush object */
2698         if (bMats->ob_mats) {
2699                 int i;
2700                 for (i=0; i<bMats->tot; i++) {
2701                         RE_free_sample_material(bMats->ob_mats[i]);
2702                 }
2703                 MEM_freeN(bMats->ob_mats);
2704         }
2705         else if (bMats->mat) {
2706                 RE_free_sample_material(bMats->mat);
2707         }
2708 }
2709
2710 /*
2711 *       Get material diffuse color and alpha (including linked textures) in given coordinates
2712 */
2713 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)
2714 {
2715         Material *mat = bMats->mat;
2716         MFace *mface = orcoDm->getTessFaceArray(orcoDm);
2717
2718         /* If no material defined, use the one assigned to the mesh face */
2719         if (mat == NULL) {
2720                 if (bMats->ob_mats) {
2721                         int mat_nr = mface[faceIndex].mat_nr;
2722                         if (mat_nr >= (*give_totcolp(brushOb))) return;
2723                         mat = bMats->ob_mats[mat_nr];
2724                         if (mat == NULL) return;        /* No material assigned */
2725                 }
2726                 else return;
2727         }
2728
2729         RE_sample_material_color(mat, color, alpha, volume_co, surface_co, faceIndex, isQuad, orcoDm, brushOb);
2730 }
2731
2732
2733 /***************************** Ray / Nearest Point Utils ******************************/
2734
2735
2736 /*  A modified callback to bvh tree raycast. The tree must bust have been built using bvhtree_from_mesh_faces.
2737 *   userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree.
2738 *  
2739 *       To optimize brush detection speed this doesn't calculate hit coordinates or normal.
2740 *       If ray hit the second half of a quad, no[0] is set to 1.0f.
2741 */
2742 static void mesh_faces_spherecast_dp(void *userdata, int index, const BVHTreeRay *ray, BVHTreeRayHit *hit)
2743 {
2744         const BVHTreeFromMesh *data = (BVHTreeFromMesh*) userdata;
2745         MVert *vert     = data->vert;
2746         MFace *face = data->face + index;
2747         short quad = 0;
2748
2749         float *t0, *t1, *t2, *t3;
2750         t0 = vert[ face->v1 ].co;
2751         t1 = vert[ face->v2 ].co;
2752         t2 = vert[ face->v3 ].co;
2753         t3 = face->v4 ? vert[ face->v4].co : NULL;
2754
2755         do
2756         {       
2757                 float dist = bvhtree_ray_tri_intersection(ray, hit->dist, t0, t1, t2);
2758
2759                 if(dist >= 0 && dist < hit->dist)
2760                 {
2761                         hit->index = index;
2762                         hit->dist = dist;
2763                         hit->no[0] = (quad) ? 1.0f : 0.0f;
2764                 }
2765
2766                 t1 = t2;
2767                 t2 = t3;
2768                 t3 = NULL;
2769                 quad = 1;
2770
2771         } while(t2);
2772 }
2773
2774 /* A modified callback to bvh tree nearest point. The tree must bust have been built using bvhtree_from_mesh_faces.
2775 *  userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree.
2776 *  
2777 *       To optimize brush detection speed this doesn't calculate hit normal.
2778 *       If ray hit the second half of a quad, no[0] is set to 1.0f, else 0.0f
2779 */
2780 static void mesh_faces_nearest_point_dp(void *userdata, int index, const float *co, BVHTreeNearest *nearest)
2781 {
2782         const BVHTreeFromMesh *data = (BVHTreeFromMesh*) userdata;
2783         MVert *vert     = data->vert;
2784         MFace *face = data->face + index;
2785         short quad = 0;
2786
2787         float *t0, *t1, *t2, *t3;
2788         t0 = vert[ face->v1 ].co;
2789         t1 = vert[ face->v2 ].co;
2790         t2 = vert[ face->v3 ].co;
2791         t3 = face->v4 ? vert[ face->v4].co : NULL;
2792
2793         do
2794         {       
2795                 float nearest_tmp[3], dist;
2796                 int vertex, edge;
2797                 
2798                 dist = nearest_point_in_tri_surface(t0, t1, t2, co, &vertex, &edge, nearest_tmp);
2799                 if(dist < nearest->dist)
2800                 {