code cleanup: favor braces when blocks have mixed brace use.
[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  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software Foundation,
16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17  *
18  * Contributor(s): Miika Hämäläinen
19  *
20  * ***** END GPL LICENSE BLOCK *****
21  */
22
23
24 #include "MEM_guardedalloc.h"
25
26 #include <math.h>
27 #include <stdio.h>
28
29 #include "BLI_blenlib.h"
30 #include "BLI_math.h"
31 #include "BLI_kdtree.h"
32 #include "BLI_threads.h"
33 #include "BLI_utildefines.h"
34
35 #include "BLF_translation.h"
36
37 #include "DNA_anim_types.h"
38 #include "DNA_armature_types.h"
39 #include "DNA_constraint_types.h"
40 #include "DNA_dynamicpaint_types.h"
41 #include "DNA_group_types.h" /*GroupObject*/
42 #include "DNA_material_types.h"
43 #include "DNA_mesh_types.h"
44 #include "DNA_meshdata_types.h"
45 #include "DNA_modifier_types.h"
46 #include "DNA_object_types.h"
47 #include "DNA_scene_types.h"
48 #include "DNA_space_types.h"
49 #include "DNA_texture_types.h"
50
51 #include "BKE_animsys.h"
52 #include "BKE_armature.h"
53 #include "BKE_bvhutils.h"   /* bvh tree */
54 #include "BKE_blender.h"
55 #include "BKE_cdderivedmesh.h"
56 #include "BKE_constraint.h"
57 #include "BKE_context.h"
58 #include "BKE_customdata.h"
59 #include "BKE_colortools.h"
60 #include "BKE_deform.h"
61 #include "BKE_depsgraph.h"
62 #include "BKE_DerivedMesh.h"
63 #include "BKE_dynamicpaint.h"
64 #include "BKE_effect.h"
65 #include "BKE_global.h"
66 #include "BKE_image.h"
67 #include "BKE_main.h"
68 #include "BKE_material.h"
69 #include "BKE_modifier.h"
70 #include "BKE_object.h"
71 #include "BKE_particle.h"
72 #include "BKE_pointcache.h"
73 #include "BKE_scene.h"
74 #include "BKE_texture.h"
75
76 #include "RNA_access.h"
77 #include "RNA_define.h"
78 #include "RNA_enum_types.h"
79
80 /* for image output     */
81 #include "IMB_imbuf_types.h"
82 #include "IMB_imbuf.h"
83
84 /* to read material/texture color       */
85 #include "RE_render_ext.h"
86 #include "RE_shader_ext.h"
87
88 #ifdef _OPENMP
89 #  include <omp.h>
90 #endif
91
92 /* could enable at some point but for now there are far too many conversions */
93 #ifdef __GNUC__
94 #  pragma GCC diagnostic ignored "-Wdouble-promotion"
95 #endif
96
97 /* precalculated gaussian factors for 5x super sampling */
98 static float gaussianFactors[5] = {0.996849f,
99                                    0.596145f,
100                                    0.596145f,
101                                    0.596145f,
102                                    0.524141f};
103 static float gaussianTotal = 3.309425f;
104
105 /* UV Image neighboring pixel table x and y list */
106 static int neighX[8] = {1, 1, 0, -1, -1, -1, 0, 1};
107 static int neighY[8] = {0, 1, 1, 1, 0, -1, -1, -1};
108
109 /* subframe_updateObject() flags */
110 #define UPDATE_PARENTS (1 << 0)
111 #define UPDATE_MESH (1 << 1)
112 #define UPDATE_EVERYTHING (UPDATE_PARENTS | UPDATE_MESH)
113 /* surface_getBrushFlags() return vals */
114 #define BRUSH_USES_VELOCITY (1 << 0)
115 /* brush mesh raycast status */
116 #define HIT_VOLUME 1
117 #define HIT_PROXIMITY 2
118 /* dynamicPaint_findNeighbourPixel() return codes */
119 #define NOT_FOUND -1
120 #define ON_MESH_EDGE -2
121 #define OUT_OF_TEXTURE -3
122 /* paint effect default movement per frame in global units */
123 #define EFF_MOVEMENT_PER_FRAME 0.05f
124 /* initial wave time factor */
125 #define WAVE_TIME_FAC (1.0f / 24.f)
126 #define CANVAS_REL_SIZE 5.0f
127 /* drying limits */
128 #define MIN_WETNESS 0.001f
129 #define MAX_WETNESS 5.0f
130
131
132 /* dissolve inline function */
133 BLI_INLINE void value_dissolve(float *r_value, const float time, const float scale, const int is_log)
134 {
135         *r_value = (is_log) ?
136                       (*r_value) * (powf(MIN_WETNESS, 1.0f / (1.2f * time / scale))) :
137                       (*r_value) - 1.0f / time * scale;
138 }
139
140
141 /***************************** Internal Structs ***************************/
142
143 typedef struct Bounds2D {
144         float min[2], max[2];
145 } Bounds2D;
146
147 typedef struct Bounds3D {
148         int valid;
149         float min[3], max[3];
150 } Bounds3D;
151
152 typedef struct VolumeGrid {
153         int dim[3];
154         Bounds3D grid_bounds; /* whole grid bounds */
155
156         Bounds3D *bounds;   /* (x*y*z) precalculated grid cell bounds */
157         int *s_pos; /* (x*y*z) t_index begin id */
158         int *s_num; /* (x*y*z) number of t_index points */
159         int *t_index; /* actual surface point index,
160                        * access: (s_pos+s_num) */
161 } VolumeGrid;
162
163 typedef struct Vec3f {
164         float v[3];
165 } Vec3f;
166
167 typedef struct BakeAdjPoint {
168         float dir[3];   /* vector pointing towards this neighbor */
169         float dist;     /* distance to */
170 } BakeAdjPoint;
171
172 /* Surface data used while processing a frame   */
173 typedef struct PaintBakeNormal {
174         float invNorm[3];  /* current pixel world-space inverted normal */
175         float normal_scale; /* normal directional scale for displace mapping */
176 } PaintBakeNormal;
177
178 /* Temp surface data used to process a frame */
179 typedef struct PaintBakeData {
180         /* point space data */
181         PaintBakeNormal *bNormal;
182         int *s_pos; /* index to start reading point sample realCoord */
183         int *s_num; /* num of realCoord samples */
184         Vec3f *realCoord;  /* current pixel center world-space coordinates for each sample
185                             *  ordered as (s_pos+s_num)*/
186         Bounds3D mesh_bounds;
187
188         /* adjacency info */
189         BakeAdjPoint *bNeighs; /* current global neighbor distances and directions, if required */
190         double average_dist;
191         /* space partitioning */
192         VolumeGrid *grid;       /* space partitioning grid to optimize brush checks */
193
194         /* velocity and movement */
195         Vec3f *velocity;        /* speed vector in global space movement per frame, if required */
196         Vec3f *prev_velocity;
197         float *brush_velocity;  /* special temp data for post-p velocity based brushes like smudge
198                                  *  3 float dir vec + 1 float str */
199         MVert *prev_verts;      /* copy of previous frame vertices. used to observe surface movement */
200         float prev_obmat[4][4]; /* previous frame object matrix */
201         int clear;              /* flag to check if surface was cleared/reset -> have to redo velocity etc. */
202
203 } PaintBakeData;
204
205 /* UV Image sequence format point       */
206 typedef struct PaintUVPoint {
207         /* Pixel / mesh data */
208         unsigned int face_index, pixel_index;   /* face index on domain derived mesh */
209         unsigned int v1, v2, v3;                /* vertex indexes */
210
211         unsigned int neighbour_pixel;   /* If this pixel isn't uv mapped to any face,
212                                          * but it's neighboring pixel is */
213         short quad;
214 } PaintUVPoint;
215
216 typedef struct ImgSeqFormatData {
217         PaintUVPoint *uv_p;
218         Vec3f *barycentricWeights;      /* b-weights for all pixel samples */
219 } ImgSeqFormatData;
220
221 /* adjacency data flags */
222 #define ADJ_ON_MESH_EDGE (1 << 0)
223
224 typedef struct PaintAdjData {
225         int *n_target;  /* array of neighboring point indexes,
226                          * for single sample use (n_index + neigh_num) */
227         int *n_index;   /* index to start reading n_target for each point */
228         int *n_num;     /* num of neighs for each point */
229         int *flags;     /* vertex adjacency flags */
230         int total_targets; /* size of n_target */
231 } PaintAdjData;
232
233 /***************************** General Utils ******************************/
234
235 /* Set canvas error string to display at the bake report */
236 static int setError(DynamicPaintCanvasSettings *canvas, const char *string)
237 {
238         /* Add error to canvas ui info label */
239         BLI_strncpy(canvas->error, string, sizeof(canvas->error));
240         return 0;
241 }
242
243 /* Get number of surface points for cached types */
244 static int dynamicPaint_surfaceNumOfPoints(DynamicPaintSurface *surface)
245 {
246         if (surface->format == MOD_DPAINT_SURFACE_F_PTEX) {
247                 return 0; /* not supported atm */
248         }
249         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
250                 if (!surface->canvas->dm) return 0;  /* invalid derived mesh */
251                 return surface->canvas->dm->getNumVerts(surface->canvas->dm);
252         }
253         else
254                 return 0;
255 }
256
257 /* checks whether surface's format/type has realtime preview */
258 int dynamicPaint_surfaceHasColorPreview(DynamicPaintSurface *surface)
259 {
260         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
261                 return 0;
262         }
263         else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
264                 if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE ||
265                     surface->type == MOD_DPAINT_SURFACE_T_WAVE)
266                 {
267                         return 0;
268                 }
269                 else {
270                         return 1;
271                 }
272         }
273         else {
274                 return 1;
275         }
276 }
277
278 /* get currently active surface (in user interface) */
279 DynamicPaintSurface *get_activeSurface(DynamicPaintCanvasSettings *canvas)
280 {
281         DynamicPaintSurface *surface = canvas->surfaces.first;
282         int i;
283
284         for (i = 0; surface; surface = surface->next) {
285                 if (i == canvas->active_sur)
286                         return surface;
287                 i++;
288         }
289         return NULL;
290 }
291
292 /* set preview to first previewable surface */
293 void dynamicPaint_resetPreview(DynamicPaintCanvasSettings *canvas)
294 {
295         DynamicPaintSurface *surface = canvas->surfaces.first;
296         int done = FALSE;
297
298         for (; surface; surface = surface->next) {
299                 if (!done && dynamicPaint_surfaceHasColorPreview(surface)) {
300                         surface->flags |= MOD_DPAINT_PREVIEW;
301                         done = TRUE;
302                 }
303                 else
304                         surface->flags &= ~MOD_DPAINT_PREVIEW;
305         }
306 }
307
308 /* set preview to defined surface */
309 static void dynamicPaint_setPreview(DynamicPaintSurface *t_surface)
310 {
311         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
312         for (; surface; surface = surface->next) {
313                 if (surface == t_surface)
314                         surface->flags |= MOD_DPAINT_PREVIEW;
315                 else
316                         surface->flags &= ~MOD_DPAINT_PREVIEW;
317         }
318 }
319
320 int dynamicPaint_outputLayerExists(struct DynamicPaintSurface *surface, Object *ob, int output)
321 {
322         char *name;
323
324         if (output == 0)
325                 name = surface->output_name;
326         else if (output == 1)
327                 name = surface->output_name2;
328         else
329                 return 0;
330
331         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
332                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
333                         Mesh *me = ob->data;
334                         return (CustomData_get_named_layer_index(&me->fdata, CD_MCOL, name) != -1);
335                 }
336                 else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT)
337                         return (defgroup_name_index(ob, surface->output_name) != -1);
338         }
339
340         return 0;
341 }
342
343 static bool surface_duplicateOutputExists(void *arg, const char *name)
344 {
345         DynamicPaintSurface *t_surface = (DynamicPaintSurface *)arg;
346         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
347
348         for (; surface; surface = surface->next) {
349                 if (surface != t_surface && surface->type == t_surface->type &&
350                     surface->format == t_surface->format)
351                 {
352                         if (surface->output_name[0] != '\0' && !BLI_path_cmp(name, surface->output_name)) return true;
353                         if (surface->output_name2[0] != '\0' && !BLI_path_cmp(name, surface->output_name2)) return true;
354                 }
355         }
356         return false;
357 }
358
359 static void surface_setUniqueOutputName(DynamicPaintSurface *surface, char *basename, int output)
360 {
361         char name[64];
362         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
363         if (!output)
364                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name, sizeof(surface->output_name));
365         if (output)
366                 BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name2, sizeof(surface->output_name2));
367 }
368
369
370 static bool surface_duplicateNameExists(void *arg, const char *name)
371 {
372         DynamicPaintSurface *t_surface = (DynamicPaintSurface *)arg;
373         DynamicPaintSurface *surface = t_surface->canvas->surfaces.first;
374
375         for (; surface; surface = surface->next) {
376                 if (surface != t_surface && !strcmp(name, surface->name)) return true;
377         }
378         return false;
379 }
380
381 void dynamicPaintSurface_setUniqueName(DynamicPaintSurface *surface, const char *basename)
382 {
383         char name[64];
384         BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */
385         BLI_uniquename_cb(surface_duplicateNameExists, surface, name, '.', surface->name, sizeof(surface->name));
386 }
387
388
389 /* change surface data to defaults on new type */
390 void dynamicPaintSurface_updateType(struct DynamicPaintSurface *surface)
391 {
392         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
393                 surface->output_name[0] = '\0';
394                 surface->output_name2[0] = '\0';
395                 surface->flags |= MOD_DPAINT_ANTIALIAS;
396                 surface->depth_clamp = 1.0f;
397         }
398         else {
399                 strcpy(surface->output_name, "dp_");
400                 BLI_strncpy(surface->output_name2, surface->output_name, sizeof(surface->output_name2));
401                 surface->flags &= ~MOD_DPAINT_ANTIALIAS;
402                 surface->depth_clamp = 0.0f;
403         }
404
405         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
406                 strcat(surface->output_name, "paintmap");
407                 strcat(surface->output_name2, "wetmap");
408                 surface_setUniqueOutputName(surface, surface->output_name2, 1);
409         }
410         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
411                 strcat(surface->output_name, "displace");
412         }
413         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
414                 strcat(surface->output_name, "weight");
415         }
416         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
417                 strcat(surface->output_name, "wave");
418         }
419
420         surface_setUniqueOutputName(surface, surface->output_name, 0);
421
422         /* update preview */
423         if (dynamicPaint_surfaceHasColorPreview(surface))
424                 dynamicPaint_setPreview(surface);
425         else
426                 dynamicPaint_resetPreview(surface->canvas);
427 }
428
429 static int surface_totalSamples(DynamicPaintSurface *surface)
430 {
431         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ &&
432             surface->flags & MOD_DPAINT_ANTIALIAS)
433         {
434                 return (surface->data->total_points * 5);
435         }
436         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
437             surface->flags & MOD_DPAINT_ANTIALIAS && surface->data->adj_data)
438         {
439                 return (surface->data->total_points + surface->data->adj_data->total_targets);
440         }
441
442         return surface->data->total_points;
443 }
444
445 static void blendColors(const float t_color[3], float t_alpha, const float s_color[3], float s_alpha, float result[4])
446 {
447         int i;
448         float i_alpha = 1.0f - s_alpha;
449         float f_alpha = t_alpha * i_alpha + s_alpha;
450
451         /* blend colors */
452         if (f_alpha) {
453                 for (i = 0; i < 3; i++) {
454                         result[i] = (t_color[i] * t_alpha * i_alpha + s_color[i] * s_alpha) / f_alpha;
455                 }
456         }
457         else {
458                 copy_v3_v3(result, t_color);
459         }
460         /* return final alpha */
461         result[3] = f_alpha;
462 }
463
464 /* Mix two alpha weighed colors by a defined ratio. output is saved at a_color */
465 static float mixColors(float a_color[3], float a_weight, float b_color[3], float b_weight, float ratio)
466 {
467         float weight_ratio, factor;
468         if (b_weight) {
469                 /* if first value has no weight just use b_color */
470                 if (!a_weight) {
471                         copy_v3_v3(a_color, b_color);
472                         return b_weight * ratio;
473                 }
474                 weight_ratio = b_weight / (a_weight + b_weight);
475         }
476         else {
477                 return a_weight * (1.0f - ratio);
478         }
479
480         /* calculate final interpolation factor */
481         if (ratio <= 0.5f) {
482                 factor = weight_ratio * (ratio * 2.0f);
483         }
484         else {
485                 ratio = (ratio * 2.0f - 1.0f);
486                 factor = weight_ratio * (1.0f - ratio) + ratio;
487         }
488         /* mix final color */
489         interp_v3_v3v3(a_color, a_color, b_color, factor);
490         return (1.0f - factor) * a_weight + factor * b_weight;
491 }
492
493 /* set "ignore cache" flag for all caches on this object */
494 static void object_cacheIgnoreClear(Object *ob, int state)
495 {
496         ListBase pidlist;
497         PTCacheID *pid;
498         BKE_ptcache_ids_from_object(&pidlist, ob, NULL, 0);
499
500         for (pid = pidlist.first; pid; pid = pid->next) {
501                 if (pid->cache) {
502                         if (state)
503                                 pid->cache->flag |= PTCACHE_IGNORE_CLEAR;
504                         else
505                                 pid->cache->flag &= ~PTCACHE_IGNORE_CLEAR;
506                 }
507         }
508
509         BLI_freelistN(&pidlist);
510 }
511
512 static int subframe_updateObject(Scene *scene, Object *ob, int flags, float frame)
513 {
514         DynamicPaintModifierData *pmd = (DynamicPaintModifierData *)modifiers_findByType(ob, eModifierType_DynamicPaint);
515         bConstraint *con;
516
517         /* if other is dynamic paint canvas, don't update */
518         if (pmd && pmd->canvas)
519                 return 1;
520
521         /* if object has parents, update them too */
522         if (flags & UPDATE_PARENTS) {
523                 int is_canvas = 0;
524                 if (ob->parent) is_canvas += subframe_updateObject(scene, ob->parent, 0, frame);
525                 if (ob->track) is_canvas += subframe_updateObject(scene, ob->track, 0, frame);
526
527                 /* skip subframe if object is parented
528                  *  to vertex of a dynamic paint canvas */
529                 if (is_canvas && (ob->partype == PARVERT1 || ob->partype == PARVERT3))
530                         return 0;
531
532                 /* also update constraint targets */
533                 for (con = ob->constraints.first; con; con = con->next) {
534                         bConstraintTypeInfo *cti = BKE_constraint_get_typeinfo(con);
535                         ListBase targets = {NULL, NULL};
536
537                         if (cti && cti->get_constraint_targets) {
538                                 bConstraintTarget *ct;
539                                 cti->get_constraint_targets(con, &targets);
540                                 for (ct = targets.first; ct; ct = ct->next) {
541                                         if (ct->tar)
542                                                 subframe_updateObject(scene, ct->tar, 0, frame);
543                                 }
544                                 /* free temp targets */
545                                 if (cti->flush_constraint_targets)
546                                         cti->flush_constraint_targets(con, &targets, 0);
547                         }
548                 }
549         }
550
551         /* was originally OB_RECALC_ALL - TODO - which flags are really needed??? */
552         ob->recalc |= OB_RECALC_OB | OB_RECALC_DATA | OB_RECALC_TIME;
553         BKE_animsys_evaluate_animdata(scene, &ob->id, ob->adt, frame, ADT_RECALC_ANIM);
554         if (flags & UPDATE_MESH) {
555                 /* ignore cache clear during subframe updates
556                  *  to not mess up cache validity */
557                 object_cacheIgnoreClear(ob, 1);
558                 BKE_object_handle_update(scene, ob);
559                 object_cacheIgnoreClear(ob, 0);
560         }
561         else
562                 BKE_object_where_is_calc_time(scene, ob, frame);
563
564         /* for curve following objects, parented curve has to be updated too */
565         if (ob->type == OB_CURVE) {
566                 Curve *cu = ob->data;
567                 BKE_animsys_evaluate_animdata(scene, &cu->id, cu->adt, frame, ADT_RECALC_ANIM);
568         }
569         /* and armatures... */
570         if (ob->type == OB_ARMATURE) {
571                 bArmature *arm = ob->data;
572                 BKE_animsys_evaluate_animdata(scene, &arm->id, arm->adt, frame, ADT_RECALC_ANIM);
573                 BKE_pose_where_is(scene, ob);
574         }
575
576         return 0;
577 }
578
579 static void scene_setSubframe(Scene *scene, float subframe)
580 {
581         /* dynamic paint subframes must be done on previous frame */
582         scene->r.cfra -= 1;
583         scene->r.subframe = subframe;
584 }
585
586 static int surface_getBrushFlags(DynamicPaintSurface *surface, Scene *scene)
587 {
588         Base *base = NULL;
589         GroupObject *go = NULL;
590         Object *brushObj = NULL;
591         ModifierData *md = NULL;
592
593         int flags = 0;
594
595         if (surface->brush_group)
596                 go = surface->brush_group->gobject.first;
597         else
598                 base = scene->base.first;
599
600         while (base || go) {
601                 brushObj = NULL;
602
603                 /* select object */
604                 if (surface->brush_group) {
605                         if (go->ob) brushObj = go->ob;
606                 }
607                 else
608                         brushObj = base->object;
609
610                 if (!brushObj) {
611                         if (surface->brush_group) go = go->next;
612                         else base = base->next;
613                         continue;
614                 }
615
616                 if (surface->brush_group)
617                         go = go->next;
618                 else
619                         base = base->next;
620
621                 md = modifiers_findByType(brushObj, eModifierType_DynamicPaint);
622                 if (md && md->mode & (eModifierMode_Realtime | eModifierMode_Render)) {
623                         DynamicPaintModifierData *pmd2 = (DynamicPaintModifierData *)md;
624
625                         if (pmd2->brush) {
626                                 DynamicPaintBrushSettings *brush = pmd2->brush;
627
628                                 if (brush->flags & MOD_DPAINT_USES_VELOCITY)
629                                         flags |= BRUSH_USES_VELOCITY;
630                         }
631                 }
632         }
633
634         return flags;
635 }
636
637 static int brush_usesMaterial(DynamicPaintBrushSettings *brush, Scene *scene)
638 {
639         return ((brush->flags & MOD_DPAINT_USE_MATERIAL) && (!strcmp(scene->r.engine, "BLENDER_RENDER")));
640 }
641
642 /* check whether two bounds intersect */
643 static int boundsIntersect(Bounds3D *b1, Bounds3D *b2)
644 {
645         int i = 2;
646         if (!b1->valid || !b2->valid) return 0;
647         for (; i >= 0; i -= 1)
648                 if (!(b1->min[i] <= b2->max[i] && b1->max[i] >= b2->min[i])) return 0;
649         return 1;
650 }
651
652 /* check whether two bounds intersect inside defined proximity */
653 static int boundsIntersectDist(Bounds3D *b1, Bounds3D *b2, float dist)
654 {
655         int i = 2;
656         if (!b1->valid || !b2->valid) return 0;
657         for (; i >= 0; i -= 1)
658                 if (!(b1->min[i] <= (b2->max[i] + dist) && b1->max[i] >= (b2->min[i] - dist))) return 0;
659         return 1;
660 }
661
662 /* check whether bounds intersects a point with given radius */
663 static int boundIntersectPoint(Bounds3D *b, float point[3], float radius)
664 {
665         int i = 2;
666         if (!b->valid) return 0;
667         for (; i >= 0; i -= 1)
668                 if (!(b->min[i] <= (point[i] + radius) && b->max[i] >= (point[i] - radius))) return 0;
669         return 1;
670 }
671
672 /* expand bounds by a new point */
673 static void boundInsert(Bounds3D *b, float point[3])
674 {
675         int i = 2;
676         if (!b->valid) {
677                 copy_v3_v3(b->min, point);
678                 copy_v3_v3(b->max, point);
679                 b->valid = 1;
680         }
681         else {
682                 for (; i >= 0; i -= 1) {
683                         if (point[i] < b->min[i]) b->min[i] = point[i];
684                         if (point[i] > b->max[i]) b->max[i] = point[i];
685                 }
686         }
687 }
688
689 static float getSurfaceDimension(PaintSurfaceData *sData)
690 {
691         Bounds3D *mb = &sData->bData->mesh_bounds;
692         return max_fff((mb->max[0] - mb->min[0]), (mb->max[1] - mb->min[1]), (mb->max[2] - mb->min[2]));
693 }
694
695 static void freeGrid(PaintSurfaceData *data)
696 {
697         PaintBakeData *bData = data->bData;
698         VolumeGrid *grid = bData->grid;
699
700         if (grid->bounds) MEM_freeN(grid->bounds);
701         if (grid->s_pos) MEM_freeN(grid->s_pos);
702         if (grid->s_num) MEM_freeN(grid->s_num);
703         if (grid->t_index) MEM_freeN(grid->t_index);
704
705         MEM_freeN(bData->grid);
706         bData->grid = NULL;
707 }
708
709 static void surfaceGenerateGrid(struct DynamicPaintSurface *surface)
710 {
711         PaintSurfaceData *sData = surface->data;
712         PaintBakeData *bData = sData->bData;
713         Bounds3D *grid_bounds;
714         VolumeGrid *grid;
715         int grid_cells, axis = 3;
716         int *temp_t_index = NULL;
717         int *temp_s_num = NULL;
718
719 #ifdef _OPENMP
720         int num_of_threads = omp_get_max_threads();
721 #else
722         int num_of_threads = 1;
723 #endif
724
725         if (bData->grid)
726                 freeGrid(sData);
727
728         /* allocate separate bounds for each thread */
729         grid_bounds = MEM_callocN(sizeof(Bounds3D) * num_of_threads, "Grid Bounds");
730         bData->grid = MEM_callocN(sizeof(VolumeGrid), "Surface Grid");
731         grid = bData->grid;
732
733         if (grid && grid_bounds) {
734                 int i, error = 0;
735                 float dim_factor, volume, dim[3];
736                 float td[3];
737                 float min_dim;
738
739                 /* calculate canvas dimensions */
740                 #pragma omp parallel for schedule(static)
741                 for (i = 0; i < sData->total_points; i++) {
742                         #ifdef _OPENMP
743                         int id = omp_get_thread_num();
744                         boundInsert(&grid_bounds[id], (bData->realCoord[bData->s_pos[i]].v));
745                         #else
746                         boundInsert(&grid_bounds[0], (bData->realCoord[bData->s_pos[i]].v));
747                         #endif
748                 }
749
750                 /* get final dimensions */
751                 for (i = 0; i < num_of_threads; i++) {
752                         boundInsert(&grid->grid_bounds, grid_bounds[i].min);
753                         boundInsert(&grid->grid_bounds, grid_bounds[i].max);
754                 }
755
756                 /* get dimensions */
757                 sub_v3_v3v3(dim, grid->grid_bounds.max, grid->grid_bounds.min);
758                 copy_v3_v3(td, dim);
759                 min_dim = max_fff(td[0], td[1], td[2]) / 1000.f;
760
761                 /* deactivate zero axises */
762                 for (i = 0; i < 3; i++) {
763                         if (td[i] < min_dim) { td[i] = 1.0f; axis -= 1; }
764                 }
765
766                 if (axis == 0 || max_fff(td[0], td[1], td[2]) < 0.0001f) {
767                         MEM_freeN(grid_bounds);
768                         MEM_freeN(bData->grid);
769                         bData->grid = NULL;
770                         return;
771                 }
772
773                 /* now calculate grid volume/area/width depending on num of active axis */
774                 volume = td[0] * td[1] * td[2];
775
776                 /* determine final grid size by trying to fit average 10.000 points per grid cell */
777                 dim_factor = (float)pow((double)volume / ((double)sData->total_points / 10000.0), 1.0 / (double)axis);
778
779                 /* define final grid size using dim_factor, use min 3 for active axises */
780                 for (i = 0; i < 3; i++) {
781                         grid->dim[i] = (int)floor(td[i] / dim_factor);
782                         CLAMP(grid->dim[i], (dim[i] >= min_dim) ? 3 : 1, 100);
783                 }
784                 grid_cells = grid->dim[0] * grid->dim[1] * grid->dim[2];
785
786                 /* allocate memory for grids */
787                 grid->bounds = MEM_callocN(sizeof(Bounds3D) * grid_cells, "Surface Grid Bounds");
788                 grid->s_pos = MEM_callocN(sizeof(int) * grid_cells, "Surface Grid Position");
789                 grid->s_num = MEM_callocN(sizeof(int) * grid_cells * num_of_threads, "Surface Grid Points");
790                 temp_s_num = MEM_callocN(sizeof(int) * grid_cells, "Temp Surface Grid Points");
791                 grid->t_index = MEM_callocN(sizeof(int) * sData->total_points, "Surface Grid Target Ids");
792                 temp_t_index = MEM_callocN(sizeof(int) * sData->total_points, "Temp Surface Grid Target Ids");
793
794                 /* in case of an allocation failure abort here */
795                 if (!grid->bounds || !grid->s_pos || !grid->s_num || !grid->t_index || !temp_s_num || !temp_t_index)
796                         error = 1;
797
798                 if (!error) {
799                         /* calculate number of points withing each cell */
800                         #pragma omp parallel for schedule(static)
801                         for (i = 0; i < sData->total_points; i++) {
802                                 int co[3], j;
803                                 for (j = 0; j < 3; j++) {
804                                         co[j] = (int)floor((bData->realCoord[bData->s_pos[i]].v[j] - grid->grid_bounds.min[j]) / dim[j] * grid->dim[j]);
805                                         CLAMP(co[j], 0, grid->dim[j] - 1);
806                                 }
807
808                                 temp_t_index[i] = co[0] + co[1] * grid->dim[0] + co[2] * grid->dim[0] * grid->dim[1];
809                                 #ifdef _OPENMP
810                                 grid->s_num[temp_t_index[i] + omp_get_thread_num() * grid_cells]++;
811                                 #else
812                                 grid->s_num[temp_t_index[i]]++;
813                                 #endif
814                         }
815
816                         /* for first cell only calc s_num */
817                         for (i = 1; i < num_of_threads; i++) {
818                                 grid->s_num[0] += grid->s_num[i * grid_cells];
819                         }
820
821                         /* calculate grid indexes */
822                         for (i = 1; i < grid_cells; i++) {
823                                 int id;
824                                 for (id = 1; id < num_of_threads; id++) {
825                                         grid->s_num[i] += grid->s_num[i + id * grid_cells];
826                                 }
827                                 grid->s_pos[i] = grid->s_pos[i - 1] + grid->s_num[i - 1];
828                         }
829
830                         /* save point indexes to final array */
831                         for (i = 0; i < sData->total_points; i++) {
832                                 int pos = grid->s_pos[temp_t_index[i]] + temp_s_num[temp_t_index[i]];
833                                 grid->t_index[pos] = i;
834
835                                 temp_s_num[temp_t_index[i]]++;
836                         }
837
838                         /* calculate cell bounds */
839                         {
840                                 int x;
841                                 #pragma omp parallel for schedule(static)
842                                 for (x = 0; x < grid->dim[0]; x++) {
843                                         int y;
844                                         for (y = 0; y < grid->dim[1]; y++) {
845                                                 int z;
846                                                 for (z = 0; z < grid->dim[2]; z++) {
847                                                         int j, b_index = x + y * grid->dim[0] + z * grid->dim[0] * grid->dim[1];
848                                                         /* set bounds */
849                                                         for (j = 0; j < 3; j++) {
850                                                                 int s = (j == 0) ? x : ((j == 1) ? y : z);
851                                                                 grid->bounds[b_index].min[j] = grid->grid_bounds.min[j] + dim[j] / grid->dim[j] * s;
852                                                                 grid->bounds[b_index].max[j] = grid->grid_bounds.min[j] + dim[j] / grid->dim[j] * (s + 1);
853                                                         }
854                                                         grid->bounds[b_index].valid = 1;
855                                                 }
856                                         }
857                                 }
858                         }
859                 }
860
861                 if (temp_s_num) MEM_freeN(temp_s_num);
862                 if (temp_t_index) MEM_freeN(temp_t_index);
863
864                 /* free per thread s_num values */
865                 grid->s_num = MEM_reallocN(grid->s_num, sizeof(int) * grid_cells);
866
867                 if (error || !grid->s_num) {
868                         setError(surface->canvas, N_("Not enough free memory"));
869                         freeGrid(sData);
870                 }
871         }
872
873         if (grid_bounds) MEM_freeN(grid_bounds);
874 }
875
876 /***************************** Freeing data ******************************/
877
878 /* Free brush data */
879 void dynamicPaint_freeBrush(struct DynamicPaintModifierData *pmd)
880 {
881         if (pmd->brush) {
882                 if (pmd->brush->dm)
883                         pmd->brush->dm->release(pmd->brush->dm);
884                 pmd->brush->dm = NULL;
885
886                 if (pmd->brush->paint_ramp)
887                         MEM_freeN(pmd->brush->paint_ramp);
888                 pmd->brush->paint_ramp = NULL;
889                 if (pmd->brush->vel_ramp)
890                         MEM_freeN(pmd->brush->vel_ramp);
891                 pmd->brush->vel_ramp = NULL;
892
893                 MEM_freeN(pmd->brush);
894                 pmd->brush = NULL;
895         }
896 }
897
898 static void dynamicPaint_freeAdjData(PaintSurfaceData *data)
899 {
900         if (data->adj_data) {
901                 if (data->adj_data->n_index) MEM_freeN(data->adj_data->n_index);
902                 if (data->adj_data->n_num) MEM_freeN(data->adj_data->n_num);
903                 if (data->adj_data->n_target) MEM_freeN(data->adj_data->n_target);
904                 if (data->adj_data->flags) MEM_freeN(data->adj_data->flags);
905                 MEM_freeN(data->adj_data);
906                 data->adj_data = NULL;
907         }
908 }
909
910 static void free_bakeData(PaintSurfaceData *data)
911 {
912         PaintBakeData *bData = data->bData;
913         if (bData) {
914                 if (bData->bNormal) MEM_freeN(bData->bNormal);
915                 if (bData->s_pos) MEM_freeN(bData->s_pos);
916                 if (bData->s_num) MEM_freeN(bData->s_num);
917                 if (bData->realCoord) MEM_freeN(bData->realCoord);
918                 if (bData->bNeighs) MEM_freeN(bData->bNeighs);
919                 if (bData->grid) freeGrid(data);
920                 if (bData->prev_verts) MEM_freeN(bData->prev_verts);
921                 if (bData->velocity) MEM_freeN(bData->velocity);
922                 if (bData->prev_velocity) MEM_freeN(bData->prev_velocity);
923
924                 MEM_freeN(data->bData);
925                 data->bData = NULL;
926         }
927 }
928
929 /* free surface data if it's not used anymore */
930 static void surface_freeUnusedData(DynamicPaintSurface *surface)
931 {
932         if (!surface->data) return;
933
934         /* free bakedata if not active or surface is baked */
935         if (!(surface->flags & MOD_DPAINT_ACTIVE) ||
936             (surface->pointcache && surface->pointcache->flag & PTCACHE_BAKED))
937         {
938                 free_bakeData(surface->data);
939         }
940 }
941
942 void dynamicPaint_freeSurfaceData(DynamicPaintSurface *surface)
943 {
944         PaintSurfaceData *data = surface->data;
945         if (!data) return;
946         if (data->format_data) {
947                 /* format specific free */
948                 if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
949                         ImgSeqFormatData *format_data = (ImgSeqFormatData *)data->format_data;
950                         if (format_data->uv_p)
951                                 MEM_freeN(format_data->uv_p);
952                         if (format_data->barycentricWeights)
953                                 MEM_freeN(format_data->barycentricWeights);
954                 }
955                 MEM_freeN(data->format_data);
956         }
957         /* type data */
958         if (data->type_data) MEM_freeN(data->type_data);
959         dynamicPaint_freeAdjData(data);
960         /* bake data */
961         free_bakeData(data);
962
963         MEM_freeN(surface->data);
964         surface->data = NULL;
965 }
966
967 void dynamicPaint_freeSurface(DynamicPaintSurface *surface)
968 {
969         /* point cache */
970         BKE_ptcache_free_list(&(surface->ptcaches));
971         surface->pointcache = NULL;
972
973         if (surface->effector_weights)
974                 MEM_freeN(surface->effector_weights);
975         surface->effector_weights = NULL;
976
977         BLI_remlink(&(surface->canvas->surfaces), surface);
978         dynamicPaint_freeSurfaceData(surface);
979         MEM_freeN(surface);
980 }
981
982 /* Free canvas data */
983 void dynamicPaint_freeCanvas(DynamicPaintModifierData *pmd)
984 {
985         if (pmd->canvas) {
986                 /* Free surface data */
987                 DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
988                 DynamicPaintSurface *next_surface = NULL;
989
990                 while (surface) {
991                         next_surface = surface->next;
992                         dynamicPaint_freeSurface(surface);
993                         surface = next_surface;
994                 }
995
996                 /* free dm copy */
997                 if (pmd->canvas->dm)
998                         pmd->canvas->dm->release(pmd->canvas->dm);
999                 pmd->canvas->dm = NULL;
1000
1001                 MEM_freeN(pmd->canvas);
1002                 pmd->canvas = NULL;
1003         }
1004 }
1005
1006 /* Free whole dp modifier */
1007 void dynamicPaint_Modifier_free(struct DynamicPaintModifierData *pmd)
1008 {
1009         if (pmd) {
1010                 dynamicPaint_freeCanvas(pmd);
1011                 dynamicPaint_freeBrush(pmd);
1012         }
1013 }
1014
1015
1016 /***************************** Initialize and reset ******************************/
1017
1018 /*
1019  * Creates a new surface and adds it to the list
1020  * If scene is null, frame range of 1-250 is used
1021  * A pointer to this surface is returned
1022  */
1023 DynamicPaintSurface *dynamicPaint_createNewSurface(DynamicPaintCanvasSettings *canvas, Scene *scene)
1024 {
1025         DynamicPaintSurface *surface = MEM_callocN(sizeof(DynamicPaintSurface), "DynamicPaintSurface");
1026         if (!surface) return NULL;
1027
1028         surface->canvas = canvas;
1029         surface->format = MOD_DPAINT_SURFACE_F_VERTEX;
1030         surface->type = MOD_DPAINT_SURFACE_T_PAINT;
1031
1032         /* cache */
1033         surface->pointcache = BKE_ptcache_add(&(surface->ptcaches));
1034         surface->pointcache->flag |= PTCACHE_DISK_CACHE;
1035         surface->pointcache->step = 1;
1036
1037         /* Set initial values */
1038         surface->flags = MOD_DPAINT_ANTIALIAS | MOD_DPAINT_MULALPHA | MOD_DPAINT_DRY_LOG | MOD_DPAINT_DISSOLVE_LOG |
1039                          MOD_DPAINT_ACTIVE | MOD_DPAINT_PREVIEW | MOD_DPAINT_OUT1 | MOD_DPAINT_USE_DRYING;
1040         surface->effect = 0;
1041         surface->effect_ui = 1;
1042
1043         surface->diss_speed = 250;
1044         surface->dry_speed = 500;
1045         surface->color_dry_threshold = 1.0f;
1046         surface->depth_clamp = 0.0f;
1047         surface->disp_factor = 1.0f;
1048         surface->disp_type = MOD_DPAINT_DISP_DISPLACE;
1049         surface->image_fileformat = MOD_DPAINT_IMGFORMAT_PNG;
1050
1051         surface->influence_scale = 1.0f;
1052         surface->radius_scale = 1.0f;
1053
1054         surface->init_color[0] = 1.0f;
1055         surface->init_color[1] = 1.0f;
1056         surface->init_color[2] = 1.0f;
1057         surface->init_color[3] = 1.0f;
1058
1059         surface->image_resolution = 256;
1060         surface->substeps = 0;
1061
1062         if (scene) {
1063                 surface->start_frame = scene->r.sfra;
1064                 surface->end_frame = scene->r.efra;
1065         }
1066         else {
1067                 surface->start_frame = 1;
1068                 surface->end_frame = 250;
1069         }
1070
1071         surface->spread_speed = 1.0f;
1072         surface->color_spread_speed = 1.0f;
1073         surface->shrink_speed = 1.0f;
1074
1075         surface->wave_damping = 0.04f;
1076         surface->wave_speed = 1.0f;
1077         surface->wave_timescale = 1.0f;
1078         surface->wave_spring = 0.20f;
1079
1080         modifier_path_init(surface->image_output_path, sizeof(surface->image_output_path), "cache_dynamicpaint");
1081
1082         dynamicPaintSurface_setUniqueName(surface, "Surface");
1083
1084         surface->effector_weights = BKE_add_effector_weights(NULL);
1085
1086         dynamicPaintSurface_updateType(surface);
1087
1088         BLI_addtail(&canvas->surfaces, surface);
1089
1090         return surface;
1091 }
1092
1093 /*
1094  * Initialize modifier data
1095  */
1096 int dynamicPaint_createType(struct DynamicPaintModifierData *pmd, int type, struct Scene *scene)
1097 {
1098         if (pmd) {
1099                 if (type == MOD_DYNAMICPAINT_TYPE_CANVAS) {
1100                         DynamicPaintCanvasSettings *canvas;
1101                         if (pmd->canvas)
1102                                 dynamicPaint_freeCanvas(pmd);
1103
1104                         canvas = pmd->canvas = MEM_callocN(sizeof(DynamicPaintCanvasSettings), "DynamicPaint Canvas");
1105                         if (!canvas)
1106                                 return 0;
1107                         canvas->pmd = pmd;
1108                         canvas->dm = NULL;
1109
1110                         /* Create one surface */
1111                         if (!dynamicPaint_createNewSurface(canvas, scene))
1112                                 return 0;
1113
1114                 }
1115                 else if (type == MOD_DYNAMICPAINT_TYPE_BRUSH) {
1116                         DynamicPaintBrushSettings *brush;
1117                         if (pmd->brush)
1118                                 dynamicPaint_freeBrush(pmd);
1119
1120                         brush = pmd->brush = MEM_callocN(sizeof(DynamicPaintBrushSettings), "DynamicPaint Paint");
1121                         if (!brush)
1122                                 return 0;
1123                         brush->pmd = pmd;
1124
1125                         brush->psys = NULL;
1126
1127                         brush->flags = MOD_DPAINT_ABS_ALPHA | MOD_DPAINT_RAMP_ALPHA;
1128                         brush->collision = MOD_DPAINT_COL_VOLUME;
1129                         
1130                         brush->mat = NULL;
1131                         brush->r = 0.15f;
1132                         brush->g = 0.4f;
1133                         brush->b = 0.8f;
1134                         brush->alpha = 1.0f;
1135                         brush->wetness = 1.0f;
1136
1137                         brush->paint_distance = 1.0f;
1138                         brush->proximity_falloff = MOD_DPAINT_PRFALL_SMOOTH;
1139
1140                         brush->particle_radius = 0.2f;
1141                         brush->particle_smooth = 0.05f;
1142
1143                         brush->wave_type = MOD_DPAINT_WAVEB_CHANGE;
1144                         brush->wave_factor = 1.0f;
1145                         brush->wave_clamp = 0.0f;
1146                         brush->smudge_strength = 0.3f;
1147                         brush->max_velocity = 1.0f;
1148
1149                         brush->dm = NULL;
1150
1151                         /* Paint proximity falloff colorramp. */
1152                         {
1153                                 CBData *ramp;
1154
1155                                 brush->paint_ramp = add_colorband(0);
1156                                 if (!brush->paint_ramp)
1157                                         return 0;
1158                                 ramp = brush->paint_ramp->data;
1159                                 /* Add default smooth-falloff ramp.     */
1160                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = 1.0f;
1161                                 ramp[0].pos = 0.0f;
1162                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].pos = 1.0f;
1163                                 ramp[1].a = 0.0f;
1164                                 pmd->brush->paint_ramp->tot = 2;
1165                         }
1166
1167                         /* Brush velocity ramp. */
1168                         {
1169                                 CBData *ramp;
1170
1171                                 brush->vel_ramp = add_colorband(0);
1172                                 if (!brush->vel_ramp)
1173                                         return 0;
1174                                 ramp = brush->vel_ramp->data;
1175                                 ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = ramp[0].pos = 0.0f;
1176                                 ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].a = ramp[1].pos = 1.0f;
1177                                 brush->paint_ramp->tot = 2;
1178                         }
1179                 }
1180         }
1181         else
1182                 return 0;
1183
1184         return 1;
1185 }
1186
1187 void dynamicPaint_Modifier_copy(struct DynamicPaintModifierData *pmd, struct DynamicPaintModifierData *tpmd)
1188 {
1189         /* Init modifier        */
1190         tpmd->type = pmd->type;
1191         if (pmd->canvas)
1192                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_CANVAS, NULL);
1193         if (pmd->brush)
1194                 dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_BRUSH, NULL);
1195
1196         /* Copy data    */
1197         if (tpmd->canvas) {
1198                 DynamicPaintSurface *surface;
1199                 tpmd->canvas->pmd = tpmd;
1200                 /* free default surface */
1201                 if (tpmd->canvas->surfaces.first)
1202                         dynamicPaint_freeSurface(tpmd->canvas->surfaces.first);
1203
1204                 /* copy existing surfaces */
1205                 for (surface = pmd->canvas->surfaces.first; surface; surface = surface->next) {
1206                         DynamicPaintSurface *t_surface = dynamicPaint_createNewSurface(tpmd->canvas, NULL);
1207
1208                         /* surface settings */
1209                         t_surface->brush_group = surface->brush_group;
1210                         MEM_freeN(t_surface->effector_weights);
1211                         t_surface->effector_weights = MEM_dupallocN(surface->effector_weights);
1212
1213                         BLI_strncpy(t_surface->name, surface->name, sizeof(t_surface->name));
1214                         t_surface->format = surface->format;
1215                         t_surface->type = surface->type;
1216                         t_surface->disp_type = surface->disp_type;
1217                         t_surface->image_fileformat = surface->image_fileformat;
1218                         t_surface->effect_ui = surface->effect_ui;
1219                         t_surface->preview_id = surface->preview_id;
1220                         t_surface->init_color_type = surface->init_color_type;
1221                         t_surface->flags = surface->flags;
1222                         t_surface->effect = surface->effect;
1223
1224                         t_surface->image_resolution = surface->image_resolution;
1225                         t_surface->substeps = surface->substeps;
1226                         t_surface->start_frame = surface->start_frame;
1227                         t_surface->end_frame = surface->end_frame;
1228
1229                         copy_v4_v4(t_surface->init_color, surface->init_color);
1230                         t_surface->init_texture = surface->init_texture;
1231                         BLI_strncpy(t_surface->init_layername, surface->init_layername, sizeof(t_surface->init_layername));
1232
1233                         t_surface->dry_speed = surface->dry_speed;
1234                         t_surface->diss_speed = surface->diss_speed;
1235                         t_surface->color_dry_threshold = surface->color_dry_threshold;
1236                         t_surface->depth_clamp = surface->depth_clamp;
1237                         t_surface->disp_factor = surface->disp_factor;
1238
1239
1240                         t_surface->spread_speed = surface->spread_speed;
1241                         t_surface->color_spread_speed = surface->color_spread_speed;
1242                         t_surface->shrink_speed = surface->shrink_speed;
1243                         t_surface->drip_vel = surface->drip_vel;
1244                         t_surface->drip_acc = surface->drip_acc;
1245
1246                         t_surface->influence_scale = surface->influence_scale;
1247                         t_surface->radius_scale = surface->radius_scale;
1248
1249                         t_surface->wave_damping = surface->wave_damping;
1250                         t_surface->wave_speed = surface->wave_speed;
1251                         t_surface->wave_timescale = surface->wave_timescale;
1252                         t_surface->wave_spring = surface->wave_spring;
1253
1254                         BLI_strncpy(t_surface->uvlayer_name, surface->uvlayer_name, sizeof(t_surface->uvlayer_name));
1255                         BLI_strncpy(t_surface->image_output_path, surface->image_output_path, sizeof(t_surface->image_output_path));
1256                         BLI_strncpy(t_surface->output_name, surface->output_name, sizeof(t_surface->output_name));
1257                         BLI_strncpy(t_surface->output_name2, surface->output_name2, sizeof(t_surface->output_name2));
1258                 }
1259                 dynamicPaint_resetPreview(tpmd->canvas);
1260         }
1261         else if (tpmd->brush) {
1262                 DynamicPaintBrushSettings *brush = pmd->brush, *t_brush = tpmd->brush;
1263                 t_brush->pmd = tpmd;
1264
1265                 t_brush->flags = brush->flags;
1266                 t_brush->collision = brush->collision;
1267
1268                 t_brush->mat = brush->mat;
1269                 t_brush->r = brush->r;
1270                 t_brush->g = brush->g;
1271                 t_brush->b = brush->b;
1272                 t_brush->alpha = brush->alpha;
1273                 t_brush->wetness = brush->wetness;
1274
1275                 t_brush->particle_radius = brush->particle_radius;
1276                 t_brush->particle_smooth = brush->particle_smooth;
1277                 t_brush->paint_distance = brush->paint_distance;
1278                 t_brush->psys = brush->psys;
1279
1280                 if (brush->paint_ramp)
1281                         memcpy(t_brush->paint_ramp, brush->paint_ramp, sizeof(ColorBand));
1282                 if (brush->vel_ramp)
1283                         memcpy(t_brush->vel_ramp, brush->vel_ramp, sizeof(ColorBand));
1284
1285                 t_brush->proximity_falloff = brush->proximity_falloff;
1286                 t_brush->wave_type = brush->wave_type;
1287                 t_brush->ray_dir = brush->ray_dir;
1288
1289                 t_brush->wave_factor = brush->wave_factor;
1290                 t_brush->wave_clamp = brush->wave_clamp;
1291                 t_brush->max_velocity = brush->max_velocity;
1292                 t_brush->smudge_strength = brush->smudge_strength;
1293         }
1294 }
1295
1296 /* allocates surface data depending on surface type */
1297 static void dynamicPaint_allocateSurfaceType(DynamicPaintSurface *surface)
1298 {
1299         PaintSurfaceData *sData = surface->data;
1300
1301         switch (surface->type) {
1302                 case MOD_DPAINT_SURFACE_T_PAINT:
1303                         sData->type_data = MEM_callocN(sizeof(PaintPoint) * sData->total_points, "DynamicPaintSurface Data");
1304                         break;
1305                 case MOD_DPAINT_SURFACE_T_DISPLACE:
1306                         sData->type_data = MEM_callocN(sizeof(float) * sData->total_points, "DynamicPaintSurface DepthData");
1307                         break;
1308                 case MOD_DPAINT_SURFACE_T_WEIGHT:
1309                         sData->type_data = MEM_callocN(sizeof(float) * sData->total_points, "DynamicPaintSurface WeightData");
1310                         break;
1311                 case MOD_DPAINT_SURFACE_T_WAVE:
1312                         sData->type_data = MEM_callocN(sizeof(PaintWavePoint) * sData->total_points, "DynamicPaintSurface WaveData");
1313                         break;
1314         }
1315
1316         if (sData->type_data == NULL) setError(surface->canvas, N_("Not enough free memory"));
1317 }
1318
1319 static int surface_usesAdjDistance(DynamicPaintSurface *surface)
1320 {
1321         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT && surface->effect) return 1;
1322         if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 1;
1323         return 0;
1324 }
1325
1326 static int surface_usesAdjData(DynamicPaintSurface *surface)
1327 {
1328         if (surface_usesAdjDistance(surface)) return 1;
1329         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX &&
1330             surface->flags & MOD_DPAINT_ANTIALIAS)
1331         {
1332                 return 1;
1333         }
1334         else {
1335                 return 0;
1336         }
1337 }
1338
1339 /* initialize surface adjacency data */
1340 static void dynamicPaint_initAdjacencyData(DynamicPaintSurface *surface, int force_init)
1341 {
1342         PaintSurfaceData *sData = surface->data;
1343         DerivedMesh *dm = surface->canvas->dm;
1344         PaintAdjData *ad;
1345         int *temp_data;
1346         int neigh_points = 0;
1347
1348         if (!surface_usesAdjData(surface) && !force_init) return;
1349
1350         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1351                 /* For vertex format, neighbors are connected by edges */
1352                 neigh_points = 2 * dm->getNumEdges(dm);
1353         }
1354         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ)
1355                 neigh_points = sData->total_points * 8;
1356
1357         if (!neigh_points) return;
1358
1359         /* allocate memory */
1360         ad = sData->adj_data = MEM_callocN(sizeof(PaintAdjData), "Surface Adj Data");
1361         if (!ad) return;
1362         ad->n_index = MEM_callocN(sizeof(int) * sData->total_points, "Surface Adj Index");
1363         ad->n_num = MEM_callocN(sizeof(int) * sData->total_points, "Surface Adj Counts");
1364         temp_data = MEM_callocN(sizeof(int) * sData->total_points, "Temp Adj Data");
1365         ad->n_target = MEM_callocN(sizeof(int) * neigh_points, "Surface Adj Targets");
1366         ad->flags = MEM_callocN(sizeof(int) * sData->total_points, "Surface Adj Flags");
1367         ad->total_targets = neigh_points;
1368
1369         /* in case of allocation error, free memory */
1370         if (!ad->n_index || !ad->n_num || !ad->n_target || !temp_data) {
1371                 dynamicPaint_freeAdjData(sData);
1372                 if (temp_data) MEM_freeN(temp_data);
1373                 setError(surface->canvas, N_("Not enough free memory"));
1374                 return;
1375         }
1376
1377         if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1378                 int i;
1379                 int n_pos;
1380
1381                 /* For vertex format, count every vertex that is connected by an edge */
1382                 int numOfEdges = dm->getNumEdges(dm);
1383                 int numOfPolys = dm->getNumPolys(dm);
1384                 struct MEdge *edge =  dm->getEdgeArray(dm);
1385                 struct MPoly *mpoly = dm->getPolyArray(dm);
1386                 struct MLoop *mloop = dm->getLoopArray(dm);
1387
1388                 /* count number of edges per vertex */
1389                 for (i = 0; i < numOfEdges; i++) {
1390                         ad->n_num[edge[i].v1]++;
1391                         ad->n_num[edge[i].v2]++;
1392
1393                         temp_data[edge[i].v1]++;
1394                         temp_data[edge[i].v2]++;
1395                 }
1396
1397                 /* also add number of vertices to temp_data
1398                  *  to locate points on "mesh edge" */
1399                 for (i = 0; i < numOfPolys; i++) {
1400                         int j = 0;
1401                         for (; j < mpoly[i].totloop; j++) {
1402                                 temp_data[mloop[mpoly[i].loopstart + j].v]++;
1403                         }
1404                 }
1405
1406                 /* now check if total number of edges+faces for
1407                  *  each vertex is even, if not -> vertex is on mesh edge */
1408                 for (i = 0; i < sData->total_points; i++) {
1409                         if ((temp_data[i] % 2) ||
1410                             (temp_data[i] < 4))
1411                         {
1412                                 ad->flags[i] |= ADJ_ON_MESH_EDGE;
1413                         }
1414
1415                         /* reset temp data */ 
1416                         temp_data[i] = 0;
1417                 }
1418
1419                 /* order n_index array */
1420                 n_pos = 0;
1421                 for (i = 0; i < sData->total_points; i++) {
1422                         ad->n_index[i] = n_pos;
1423                         n_pos += ad->n_num[i];
1424                 }
1425
1426                 /* and now add neighbor data using that info */
1427                 for (i = 0; i < numOfEdges; i++) {
1428                         /* first vertex */
1429                         int index = edge[i].v1;
1430                         n_pos = ad->n_index[index] + temp_data[index];
1431                         ad->n_target[n_pos] = edge[i].v2;
1432                         temp_data[index]++;
1433
1434                         /* second vertex */
1435                         index = edge[i].v2;
1436                         n_pos = ad->n_index[index] + temp_data[index];
1437                         ad->n_target[n_pos] = edge[i].v1;
1438                         temp_data[index]++;
1439                 }
1440         }
1441         else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1442                 /* for image sequences, only allocate memory.
1443                  *  bake initialization takes care of rest */
1444         }
1445
1446         MEM_freeN(temp_data);
1447 }
1448
1449 static void dynamicPaint_setInitialColor(DynamicPaintSurface *surface)
1450 {
1451         PaintSurfaceData *sData = surface->data;
1452         PaintPoint *pPoint = (PaintPoint *)sData->type_data;
1453         DerivedMesh *dm = surface->canvas->dm;
1454         int i;
1455
1456         if (surface->type != MOD_DPAINT_SURFACE_T_PAINT)
1457                 return;
1458
1459         if (surface->init_color_type == MOD_DPAINT_INITIAL_NONE)
1460                 return;
1461         /* Single color */
1462         else if (surface->init_color_type == MOD_DPAINT_INITIAL_COLOR) {
1463                 /* apply color to every surface point */
1464                 #pragma omp parallel for schedule(static)
1465                 for (i = 0; i < sData->total_points; i++) {
1466                         copy_v3_v3(pPoint[i].color, surface->init_color);
1467                         pPoint[i].alpha = surface->init_color[3];
1468                 }
1469         }
1470         /* UV mapped texture */
1471         else if (surface->init_color_type == MOD_DPAINT_INITIAL_TEXTURE) {
1472                 Tex *tex = surface->init_texture;
1473                 MTFace *tface;
1474                 MFace *mface = dm->getTessFaceArray(dm);
1475                 int numOfFaces = dm->getNumTessFaces(dm);
1476                 char uvname[MAX_CUSTOMDATA_LAYER_NAME];
1477
1478                 if (!tex) return;
1479
1480                 /* get uv map */
1481                 CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->init_layername, uvname);
1482                 tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
1483                 if (!tface) return;
1484
1485                 /* for vertex surface loop through tfaces and find uv color
1486                  *  that provides highest alpha */
1487                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1488                         struct ImagePool *pool = BKE_image_pool_new();
1489
1490                         #pragma omp parallel for schedule(static) shared(pool)
1491                         for (i = 0; i < numOfFaces; i++) {
1492                                 int numOfVert = (mface[i].v4) ? 4 : 3;
1493                                 float uv[3] = {0.0f};
1494                                 int j;
1495                                 for (j = 0; j < numOfVert; j++) {
1496                                         TexResult texres = {0};
1497                                         unsigned int *vert = (&mface[i].v1) + j;
1498
1499                                         /* remap to -1.0 to 1.0 */
1500                                         uv[0] = tface[i].uv[j][0] * 2.0f - 1.0f;
1501                                         uv[1] = tface[i].uv[j][1] * 2.0f - 1.0f;
1502
1503                                         multitex_ext_safe(tex, uv, &texres, pool);
1504
1505                                         if (texres.tin > pPoint[*vert].alpha) {
1506                                                 copy_v3_v3(pPoint[*vert].color, &texres.tr);
1507                                                 pPoint[*vert].alpha = texres.tin;
1508                                         }
1509                                 }
1510                         }
1511                         BKE_image_pool_free(pool);
1512                 }
1513                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1514                         ImgSeqFormatData *f_data = (ImgSeqFormatData *)sData->format_data;
1515                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1516
1517                         #pragma omp parallel for schedule(static)
1518                         for (i = 0; i < sData->total_points; i++) {
1519                                 float uv[9] = {0.0f};
1520                                 float uv_final[3] = {0.0f};
1521                                 int j;
1522                                 TexResult texres = {0};
1523
1524                                 /* collect all uvs */
1525                                 for (j = 0; j < 3; j++) {
1526                                         int v = (f_data->uv_p[i].quad && j > 0) ? j + 1 : j;
1527                                         copy_v2_v2(&uv[j * 3], tface[f_data->uv_p[i].face_index].uv[v]);
1528                                 }
1529
1530                                 /* interpolate final uv pos */
1531                                 interp_v3_v3v3v3(uv_final, &uv[0], &uv[3], &uv[6],
1532                                                  f_data->barycentricWeights[i * samples].v);
1533                                 /* remap to -1.0 to 1.0 */
1534                                 uv_final[0] = uv_final[0] * 2.0f - 1.0f;
1535                                 uv_final[1] = uv_final[1] * 2.0f - 1.0f;
1536                                         
1537                                 multitex_ext_safe(tex, uv_final, &texres, NULL);
1538
1539                                 /* apply color */
1540                                 copy_v3_v3(pPoint[i].color, &texres.tr);
1541                                 pPoint[i].alpha = texres.tin;
1542                         }
1543                 }
1544         }
1545         /* vertex color layer */
1546         else if (surface->init_color_type == MOD_DPAINT_INITIAL_VERTEXCOLOR) {
1547
1548                 /* for vertex surface, just copy colors from mcol */
1549                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1550                         MLoop *mloop = dm->getLoopArray(dm);
1551                         int numOfLoops = dm->getNumLoops(dm);
1552                         MCol *col = CustomData_get_layer_named(&dm->loopData, CD_MLOOPCOL, surface->init_layername);
1553                         if (!col) return;
1554
1555                         #pragma omp parallel for schedule(static)
1556                         for (i = 0; i < numOfLoops; i++) {
1557                                 pPoint[mloop[i].v].color[0] = 1.0f / 255.f * (float)col[i].b;
1558                                 pPoint[mloop[i].v].color[1] = 1.0f / 255.f * (float)col[i].g;
1559                                 pPoint[mloop[i].v].color[2] = 1.0f / 255.f * (float)col[i].r;
1560                                 pPoint[mloop[i].v].alpha = 1.0f / 255.f * (float)col[i].a;
1561                         }
1562                 }
1563                 else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) {
1564                         ImgSeqFormatData *f_data = (ImgSeqFormatData *)sData->format_data;
1565                         int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
1566                         MCol *col = CustomData_get_layer_named(&dm->faceData, CD_MCOL, surface->init_layername);
1567                         if (!col) return;
1568
1569                         #pragma omp parallel for schedule(static)
1570                         for (i = 0; i < sData->total_points; i++) {
1571                                 int face_ind = f_data->uv_p[i].face_index;
1572                                 float colors[3][4] = {{0.0f, 0.0f, 0.0f, 0.0f}};
1573                                 float final_color[4];
1574                                 int j;
1575                                 /* collect color values */
1576                                 for (j = 0; j < 3; j++) {
1577                                         int v = (f_data->uv_p[i].quad && j > 0) ? j + 1 : j;
1578                                         colors[j][0] = 1.0f / 255.f * (float)col[face_ind * 4 + v].b;
1579                                         colors[j][1] = 1.0f / 255.f * (float)col[face_ind * 4 + v].g;
1580                                         colors[j][2] = 1.0f / 255.f * (float)col[face_ind * 4 + v].r;
1581                                         colors[j][3] = 1.0f / 255.f * (float)col[face_ind * 4 + v].a;
1582                                 }
1583                                 
1584                                 /* interpolate final color */
1585                                 interp_v4_v4v4v4(final_color, colors[0], colors[1], colors[2],
1586                                                  f_data->barycentricWeights[i * samples].v);
1587
1588                                 copy_v3_v3(pPoint[i].color, final_color);
1589                                 pPoint[i].alpha = final_color[3];
1590                         }
1591                 }
1592         }
1593 }
1594
1595 /* clears surface data back to zero */
1596 void dynamicPaint_clearSurface(DynamicPaintSurface *surface)
1597 {
1598         PaintSurfaceData *sData = surface->data;
1599         if (sData && sData->type_data) {
1600                 unsigned int data_size;
1601
1602                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1603                         data_size = sizeof(PaintPoint);
1604                 else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE)
1605                         data_size = sizeof(PaintWavePoint);
1606                 else
1607                         data_size = sizeof(float);
1608
1609                 memset(sData->type_data, 0, data_size * sData->total_points);
1610
1611                 /* set initial color */
1612                 if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1613                         dynamicPaint_setInitialColor(surface);
1614
1615                 if (sData->bData)
1616                         sData->bData->clear = 1;
1617         }
1618 }
1619
1620 /* completely (re)initializes surface (only for point cache types)*/
1621 int dynamicPaint_resetSurface(DynamicPaintSurface *surface)
1622 {
1623         int numOfPoints = dynamicPaint_surfaceNumOfPoints(surface);
1624         /* free existing data */
1625         if (surface->data) dynamicPaint_freeSurfaceData(surface);
1626
1627         /* don't reallocate for image sequence types. they get handled only on bake */
1628         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 1;
1629         if (numOfPoints < 1) return 0;
1630
1631         /* allocate memory */
1632         surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
1633         if (!surface->data) return 0;
1634
1635         /* allocate data depending on surface type and format */
1636         surface->data->total_points = numOfPoints;
1637         dynamicPaint_allocateSurfaceType(surface);
1638         dynamicPaint_initAdjacencyData(surface, 0);
1639
1640         /* set initial color */
1641         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT)
1642                 dynamicPaint_setInitialColor(surface);
1643
1644         return 1;
1645 }
1646
1647 /* make sure allocated surface size matches current requirements */
1648 static int dynamicPaint_checkSurfaceData(DynamicPaintSurface *surface)
1649 {
1650         if (!surface->data || ((dynamicPaint_surfaceNumOfPoints(surface) != surface->data->total_points))) {
1651                 return dynamicPaint_resetSurface(surface);
1652         }
1653         return 1;
1654 }
1655
1656
1657 /***************************** Modifier processing ******************************/
1658
1659
1660 /* apply displacing vertex surface to the derived mesh */
1661 static void dynamicPaint_applySurfaceDisplace(DynamicPaintSurface *surface, DerivedMesh *result)
1662 {
1663         PaintSurfaceData *sData = surface->data;
1664
1665         if (!sData || surface->format != MOD_DPAINT_SURFACE_F_VERTEX) return;
1666
1667         /* displace paint */
1668         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
1669                 MVert *mvert = result->getVertArray(result);
1670                 int i;
1671                 float *value = (float *)sData->type_data;
1672
1673                 #pragma omp parallel for schedule(static)
1674                 for (i = 0; i < sData->total_points; i++) {
1675                         float normal[3], val = value[i] * surface->disp_factor;
1676                         normal_short_to_float_v3(normal, mvert[i].no);
1677                         normalize_v3(normal);
1678
1679                         mvert[i].co[0] -= normal[0] * val;
1680                         mvert[i].co[1] -= normal[1] * val;
1681                         mvert[i].co[2] -= normal[2] * val;
1682                 }
1683         }
1684 }
1685
1686 /*
1687  *      Apply canvas data to the object derived mesh
1688  */
1689 static DerivedMesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd,
1690                                                 Object *ob,
1691                                                 DerivedMesh *dm)
1692 {
1693         DerivedMesh *result = CDDM_copy(dm);
1694
1695         if (pmd->canvas && !(pmd->canvas->flags & MOD_DPAINT_BAKING)) {
1696
1697                 DynamicPaintSurface *surface;
1698                 int update_normals = 0;
1699
1700                 /* loop through surfaces */
1701                 for (surface = pmd->canvas->surfaces.first; surface; surface = surface->next) {
1702                         PaintSurfaceData *sData = surface->data;
1703
1704                         if (surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ && sData) {
1705                                 if (!(surface->flags & (MOD_DPAINT_ACTIVE))) continue;
1706
1707                                 /* process vertex surface previews */
1708                                 if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) {
1709
1710                                         /* vertex color paint */
1711                                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
1712
1713                                                 int i;
1714                                                 PaintPoint *pPoint = (PaintPoint *)sData->type_data;
1715                                                 MLoopCol *col = NULL;
1716                                                 MLoop *mloop = CDDM_get_loops(result);
1717                                                 int totloop = result->numLoopData;
1718
1719                                                 /* paint is stored on dry and wet layers, so mix final color first */
1720                                                 float *fcolor = MEM_callocN(sizeof(float) * sData->total_points * 4, "Temp paint color");
1721
1722                                                 #pragma omp parallel for schedule(static)
1723                                                 for (i = 0; i < sData->total_points; i++) {
1724                                                         /* blend dry and wet layer */
1725                                                         blendColors(pPoint[i].color, pPoint[i].alpha, pPoint[i].e_color, pPoint[i].e_alpha, &fcolor[i * 4]);
1726                                                 }
1727
1728                                                 /* viewport preview */
1729                                                 if (surface->flags & MOD_DPAINT_PREVIEW) {
1730                                                         MPoly *mp = CDDM_get_polys(result);
1731                                                         int totpoly = result->numPolyData;
1732
1733 #if 0
1734                                                         /* XXX We have to create a CD_PREVIEW_MCOL, else it might sigsev
1735                                                          *     (after a SubSurf mod, eg)... */
1736                                                         if (!result->getTessFaceDataArray(result, CD_PREVIEW_MCOL)) {
1737                                                                 int numFaces = result->getNumTessFaces(result);
1738                                                                 CustomData_add_layer(&result->faceData, CD_PREVIEW_MCOL, CD_CALLOC, NULL, numFaces);
1739                                                         }
1740 #endif
1741
1742                                                         /* Save preview results to weight layer to be
1743                                                          *   able to share same drawing methods */
1744                                                         col = CustomData_get_layer(&result->loopData, CD_PREVIEW_MLOOPCOL);
1745                                                         if (!col)
1746                                                                 col = CustomData_add_layer(&result->loopData, CD_PREVIEW_MLOOPCOL, CD_CALLOC,
1747                                                                                            NULL, totloop);
1748
1749                                                         if (col) {
1750                                                                 #pragma omp parallel for schedule(static)
1751                                                                 for (i = 0; i < totpoly; i++) {
1752                                                                         int j = 0;
1753                                                                         Material *material = give_current_material(ob, mp[i].mat_nr + 1);
1754
1755                                                                         for (; j < mp[i].totloop; j++) {
1756                                                                                 int l_index = mp[i].loopstart + j;
1757                                                                                 int v_index = mloop[l_index].v;
1758
1759                                                                                 if (surface->preview_id == MOD_DPAINT_SURFACE_PREV_PAINT) {
1760                                                                                         float c[3];
1761                                                                                         v_index *= 4;
1762
1763                                                                                         /* Apply material color as base vertex color for preview */
1764                                                                                         col[l_index].a = 255;
1765                                                                                         if (material) {
1766                                                                                                 c[0] = material->r;
1767                                                                                                 c[1] = material->g;
1768                                                                                                 c[2] = material->b;
1769                                                                                         }
1770                                                                                         else { /* default gray */
1771                                                                                                 c[0] = 0.65f;
1772                                                                                                 c[1] = 0.65f;
1773                                                                                                 c[2] = 0.65f;
1774                                                                                         }
1775                                                                                         /* mix surface color */
1776                                                                                         interp_v3_v3v3(c, c, &fcolor[v_index], fcolor[v_index + 3]);
1777
1778                                                                                         rgb_float_to_uchar((unsigned char *)&col[l_index].r, c);
1779                                                                                 }
1780                                                                                 else {
1781                                                                                         col[l_index].r =
1782                                                                                             col[l_index].g =
1783                                                                                                 col[l_index].b = FTOCHAR(pPoint[v_index].wetness);
1784                                                                                         col[l_index].a = 255;
1785                                                                                 }
1786                                                                         }
1787                                                                 }
1788                                                         }
1789                                                 }
1790
1791
1792                                                 /* save layer data to output layer */
1793
1794                                                 /* paint layer */
1795                                                 col = CustomData_get_layer_named(&result->loopData, CD_MLOOPCOL, surface->output_name);
1796                                                 /* if output layer is lost from a constructive modifier, re-add it */
1797                                                 if (!col && dynamicPaint_outputLayerExists(surface, ob, 0))
1798                                                         col = CustomData_add_layer_named(&result->loopData, CD_MLOOPCOL, CD_CALLOC, NULL, totloop, surface->output_name);
1799                                                 /* apply color */
1800                                                 if (col) {
1801                                                         #pragma omp parallel for schedule(static)
1802                                                         for (i = 0; i < totloop; i++) {
1803                                                                 int index = mloop[i].v * 4;
1804                                                                 rgb_float_to_uchar((unsigned char *)&col[i].r, &fcolor[index]);
1805                                                                 col[i].a = FTOCHAR(fcolor[index + 3]); /* IS THIS NEEDED? */
1806                                                         }
1807                                                 }
1808                                                 
1809                                                 MEM_freeN(fcolor);
1810
1811                                                 /* wet layer */
1812                                                 col = CustomData_get_layer_named(&result->loopData, CD_MLOOPCOL, surface->output_name2);
1813                                                 /* if output layer is lost from a constructive modifier, re-add it */
1814                                                 if (!col && dynamicPaint_outputLayerExists(surface, ob, 1))
1815                                                         col = CustomData_add_layer_named(&result->loopData, CD_MLOOPCOL, CD_CALLOC, NULL, totloop, surface->output_name2);
1816                                                 /* apply color */
1817                                                 if (col) {
1818                                                         #pragma omp parallel for schedule(static)
1819                                                         for (i = 0; i < totloop; i++) {
1820                                                                 int index = mloop[i].v;
1821                                                                 col[i].r =
1822                                                                     col[i].g =
1823                                                                         col[i].b = FTOCHAR(pPoint[index].wetness);
1824                                                                 col[i].a = 255;
1825                                                         }
1826                                                 }
1827
1828                                                 /* Mark tessellated CD layers as dirty. */
1829                                                 result->dirty |= DM_DIRTY_TESS_CDLAYERS;
1830                                         }
1831                                         /* vertex group paint */
1832                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
1833                                                 int defgrp_index = defgroup_name_index(ob, surface->output_name);
1834                                                 MDeformVert *dvert = result->getVertDataArray(result, CD_MDEFORMVERT);
1835                                                 float *weight = (float *)sData->type_data;
1836
1837                                                 /* viewport preview */
1838                                                 if (surface->flags & MOD_DPAINT_PREVIEW) {
1839                                                         /* Save preview results to weight layer to be
1840                                                          * able to share same drawing methods.
1841                                                          * Note this func also sets DM_DIRTY_TESS_CDLAYERS flag! */
1842                                                         DM_update_weight_mcol(ob, result, 0, weight, 0, NULL);
1843                                                 }
1844
1845                                                 /* apply weights into a vertex group, if doesnt exists add a new layer */
1846                                                 if (defgrp_index != -1 && !dvert && (surface->output_name[0] != '\0'))
1847                                                         dvert = CustomData_add_layer_named(&result->vertData, CD_MDEFORMVERT, CD_CALLOC,
1848                                                                                            NULL, sData->total_points, surface->output_name);
1849                                                 if (defgrp_index != -1 && dvert) {
1850                                                         int i;
1851                                                         for (i = 0; i < sData->total_points; i++) {
1852                                                                 MDeformVert *dv = &dvert[i];
1853                                                                 MDeformWeight *def_weight = defvert_find_index(dv, defgrp_index);
1854
1855                                                                 /* skip if weight value is 0 and no existing weight is found */
1856                                                                 if ((def_weight != NULL) || (weight[i] != 0.0f)) {
1857
1858                                                                         /* if not found, add a weight for it */
1859                                                                         if (def_weight == NULL) {
1860                                                                                 def_weight = defvert_verify_index(dv, defgrp_index);
1861                                                                         }
1862
1863                                                                         /* set weight value */
1864                                                                         def_weight->weight = weight[i];
1865                                                                 }
1866                                                         }
1867                                                 }
1868                                         }
1869                                         /* wave simulation */
1870                                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
1871                                                 MVert *mvert = result->getVertArray(result);
1872                                                 int i;
1873                                                 PaintWavePoint *wPoint = (PaintWavePoint *)sData->type_data;
1874
1875                                                 #pragma omp parallel for schedule(static)
1876                                                 for (i = 0; i < sData->total_points; i++) {
1877                                                         float normal[3];
1878                                                         normal_short_to_float_v3(normal, mvert[i].no);
1879                                                         madd_v3_v3fl(mvert[i].co, normal, wPoint[i].height);
1880                                                 }
1881                                                 update_normals = 1;
1882                                         }
1883
1884                                         /* displace */
1885                                         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
1886                                                 dynamicPaint_applySurfaceDisplace(surface, result);
1887                                                 update_normals = 1;
1888                                         }
1889                                 }
1890                         }
1891                 }
1892
1893                 if (update_normals)
1894                         CDDM_calc_normals(result);
1895         }
1896         /* make a copy of dm to use as brush data */
1897         if (pmd->brush) {
1898                 if (pmd->brush->dm) pmd->brush->dm->release(pmd->brush->dm);
1899                 pmd->brush->dm = CDDM_copy(result);
1900         }
1901
1902         return result;
1903 }
1904
1905 /* update cache frame range */
1906 void dynamicPaint_cacheUpdateFrames(DynamicPaintSurface *surface)
1907 {
1908         if (surface->pointcache) {
1909                 surface->pointcache->startframe = surface->start_frame;
1910                 surface->pointcache->endframe = surface->end_frame;
1911         }
1912 }
1913
1914 static void canvas_copyDerivedMesh(DynamicPaintCanvasSettings *canvas, DerivedMesh *dm)
1915 {
1916         if (canvas->dm) {
1917                 canvas->dm->release(canvas->dm);
1918         }
1919
1920         canvas->dm = CDDM_copy(dm);
1921 }
1922
1923 /*
1924  *      Updates derived mesh copy and processes dynamic paint step / caches.
1925  */
1926 static void dynamicPaint_frameUpdate(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
1927 {
1928         if (pmd->canvas) {
1929                 DynamicPaintCanvasSettings *canvas = pmd->canvas;
1930                 DynamicPaintSurface *surface = canvas->surfaces.first;
1931
1932                 /* update derived mesh copy */
1933                 canvas_copyDerivedMesh(canvas, dm);
1934
1935                 /* in case image sequence baking, stop here */
1936                 if (canvas->flags & MOD_DPAINT_BAKING) return;
1937
1938                 /* loop through surfaces */
1939                 for (; surface; surface = surface->next) {
1940                         int current_frame = (int)scene->r.cfra;
1941
1942                         /* free bake data if not required anymore */
1943                         surface_freeUnusedData(surface);
1944
1945                         /* image sequences are handled by bake operator */
1946                         if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) continue;
1947                         if (!(surface->flags & MOD_DPAINT_ACTIVE)) continue;
1948
1949                         /* make sure surface is valid */
1950                         if (!dynamicPaint_checkSurfaceData(surface)) continue;
1951
1952                         /* limit frame range */
1953                         CLAMP(current_frame, surface->start_frame, surface->end_frame);
1954
1955                         if (current_frame != surface->current_frame || (int)scene->r.cfra == surface->start_frame) {
1956                                 PointCache *cache = surface->pointcache;
1957                                 PTCacheID pid;
1958                                 surface->current_frame = current_frame;
1959
1960                                 /* read point cache */
1961                                 BKE_ptcache_id_from_dynamicpaint(&pid, ob, surface);
1962                                 pid.cache->startframe = surface->start_frame;
1963                                 pid.cache->endframe = surface->end_frame;
1964                                 BKE_ptcache_id_time(&pid, scene, (float)scene->r.cfra, NULL, NULL, NULL);
1965
1966                                 /* reset non-baked cache at first frame */
1967                                 if ((int)scene->r.cfra == surface->start_frame && !(cache->flag & PTCACHE_BAKED)) {
1968                                         cache->flag |= PTCACHE_REDO_NEEDED;
1969                                         BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
1970                                         cache->flag &= ~PTCACHE_REDO_NEEDED;
1971                                 }
1972
1973                                 /* try to read from cache */
1974                                 if (BKE_ptcache_read(&pid, (float)scene->r.cfra)) {
1975                                         BKE_ptcache_validate(cache, (int)scene->r.cfra);
1976                                 }
1977                                 /* if read failed and we're on surface range do recalculate */
1978                                 else if ((int)scene->r.cfra == current_frame && !(cache->flag & PTCACHE_BAKED)) {
1979                                         /* calculate surface frame */
1980                                         canvas->flags |= MOD_DPAINT_BAKING;
1981                                         dynamicPaint_calculateFrame(surface, scene, ob, current_frame);
1982                                         canvas->flags &= ~MOD_DPAINT_BAKING;
1983
1984                                         /* restore canvas derivedmesh if required */
1985                                         if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE &&
1986                                             surface->flags & MOD_DPAINT_DISP_INCREMENTAL && surface->next)
1987                                         {
1988                                                 canvas_copyDerivedMesh(canvas, dm);
1989                                         }
1990
1991                                         BKE_ptcache_validate(cache, surface->current_frame);
1992                                         BKE_ptcache_write(&pid, surface->current_frame);
1993                                 }
1994                         }
1995                 }
1996         }
1997 }
1998
1999 /* Modifier call. Processes dynamic paint modifier step. */
2000 DerivedMesh *dynamicPaint_Modifier_do(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm)
2001 {
2002         /* For now generate tessfaces in every case
2003          *  XXX - move/remove when most of dpaint functions are converted to use bmesh types */
2004         DM_ensure_tessface(dm);
2005
2006         /* Update canvas data for a new frame */
2007         dynamicPaint_frameUpdate(pmd, scene, ob, dm);
2008
2009         /* Return output mesh */
2010         return dynamicPaint_Modifier_apply(pmd, ob, dm);
2011 }
2012
2013
2014 /***************************** Image Sequence / UV Image Surface Calls ******************************/
2015
2016 /*
2017  *      Tries to find the neighboring pixel in given (uv space) direction.
2018  *      Result is used by effect system to move paint on the surface.
2019  *
2020  *   px, py : origin pixel x and y
2021  *      n_index : lookup direction index (use neighX, neighY to get final index)
2022  */
2023 static int dynamicPaint_findNeighbourPixel(PaintUVPoint *tempPoints, DerivedMesh *dm,
2024                                            const char *uvname, int w, int h, int px, int py, int n_index)
2025 {
2026         /* Note: Current method only uses polygon edges to detect neighboring pixels.
2027          *  -> It doesn't always lead to the optimum pixel but is accurate enough
2028          *  and faster/simpler than including possible face tip point links)
2029          */
2030
2031         int x, y;
2032         PaintUVPoint *tPoint = NULL;
2033         PaintUVPoint *cPoint = NULL;
2034
2035         /* shift position by given n_index */
2036         x = px + neighX[n_index];
2037         y = py + neighY[n_index];
2038
2039         if (x < 0 || x >= w) return OUT_OF_TEXTURE;
2040         if (y < 0 || y >= h) return OUT_OF_TEXTURE;
2041
2042         tPoint = &tempPoints[x + w * y];        /* UV neighbor */
2043         cPoint = &tempPoints[px + w * py];      /* Origin point */
2044
2045         /*
2046          *      Check if shifted point is on same face -> it's a correct neighbor
2047          *   (and if it isn't marked as an "edge pixel")
2048          */
2049         if ((tPoint->face_index == cPoint->face_index) && (tPoint->neighbour_pixel == -1))
2050                 return (x + w * y);
2051
2052         /*
2053          *      Even if shifted point is on another face
2054          *      -> use this point.
2055          *
2056          *      !! Replace with "is uv faces linked" check !!
2057          *      This should work fine as long as uv island
2058          *      margin is > 1 pixel.
2059          */
2060         if ((tPoint->face_index != -1) && (tPoint->neighbour_pixel == -1)) {
2061                 return (x + w * y);
2062         }
2063
2064         /*
2065          *      If we get here, the actual neighboring pixel
2066          *      is located on a non-linked uv face, and we have to find
2067          *      it's "real" position.
2068          *
2069          *      Simple neighboring face finding algorithm:
2070          *      - find closest uv edge to shifted pixel and get
2071          *        the another face that shares that edge
2072          *      - find corresponding position of that new face edge
2073          *        in uv space
2074          *
2075          *      TODO: Implement something more accurate / optimized?
2076          */
2077         {
2078                 int numOfFaces = dm->getNumTessFaces(dm);
2079                 MFace *mface = dm->getTessFaceArray(dm);
2080                 MTFace *tface =  CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
2081
2082                 /* Get closest edge to that subpixel on UV map  */
2083                 {
2084                         float pixel[2];
2085                         /* distances only used for comparison */
2086                         float dist_squared, t_dist_squared;
2087
2088                         int i, uindex[3], edge1_index, edge2_index,
2089                             e1_index, e2_index, target_face;
2090                         float closest_point[2], lambda, dir_vec[2];
2091                         int target_uv1, target_uv2, final_pixel[2], final_index;
2092
2093                         float *s_uv1, *s_uv2, *t_uv1, *t_uv2;
2094
2095                         pixel[0] = ((float)(px + neighX[n_index]) + 0.5f) / (float)w;
2096                         pixel[1] = ((float)(py + neighY[n_index]) + 0.5f) / (float)h;
2097
2098                         /* Get uv indexes for current face part */
2099                         if (cPoint->quad) {
2100                                 uindex[0] = 0; uindex[1] = 2; uindex[2] = 3;
2101                         }
2102                         else {
2103                                 uindex[0] = 0; uindex[1] = 1; uindex[2] = 2;
2104                         }
2105
2106                         /*
2107                          *      Find closest edge to that pixel
2108                          */
2109                         /* Dist to first edge */
2110                         e1_index = cPoint->v1; e2_index = cPoint->v2; edge1_index = uindex[0]; edge2_index = uindex[1];
2111                         dist_squared = dist_squared_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
2112
2113                         /* Dist to second edge */
2114                         t_dist_squared = dist_squared_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[1]], tface[cPoint->face_index].uv[uindex[2]]);
2115                         if (t_dist_squared < dist_squared) { e1_index = cPoint->v2; e2_index = cPoint->v3; edge1_index = uindex[1]; edge2_index = uindex[2]; dist_squared = t_dist_squared; }
2116
2117                         /* Dist to third edge */
2118                         t_dist_squared = dist_squared_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[2]], tface[cPoint->face_index].uv[uindex[0]]);
2119                         if (t_dist_squared < dist_squared) { e1_index = cPoint->v3; e2_index = cPoint->v1;  edge1_index = uindex[2]; edge2_index = uindex[0]; dist_squared = t_dist_squared; }
2120
2121
2122                         /*
2123                          *      Now find another face that is linked to that edge
2124                          */
2125                         target_face = -1;
2126
2127                         for (i = 0; i < numOfFaces; i++) {
2128                                 /*
2129                                  *      Check if both edge vertices share this face
2130                                  */
2131                                 int v4 = (mface[i].v4) ? mface[i].v4 : -1;
2132
2133                                 if ((e1_index == mface[i].v1 || e1_index == mface[i].v2 || e1_index == mface[i].v3 || e1_index == v4) &&
2134                                     (e2_index == mface[i].v1 || e2_index == mface[i].v2 || e2_index == mface[i].v3 || e2_index == v4))
2135                                 {
2136                                         if (i == cPoint->face_index) continue;
2137
2138                                         target_face = i;
2139
2140                                         /*
2141                                          *      Get edge UV index
2142                                          */
2143                                         if (e1_index == mface[i].v1) target_uv1 = 0;
2144                                         else if (e1_index == mface[i].v2) target_uv1 = 1;
2145                                         else if (e1_index == mface[i].v3) target_uv1 = 2;
2146                                         else target_uv1 = 3;
2147
2148                                         if (e2_index == mface[i].v1) target_uv2 = 0;
2149                                         else if (e2_index == mface[i].v2) target_uv2 = 1;
2150                                         else if (e2_index == mface[i].v3) target_uv2 = 2;
2151                                         else target_uv2 = 3;
2152
2153                                         break;
2154                                 }
2155                         }
2156
2157                         /* If none found pixel is on mesh edge  */
2158                         if (target_face == -1) return ON_MESH_EDGE;
2159
2160                         /*
2161                          *      If target face is connected in UV space as well, just use original index
2162                          */
2163                         s_uv1 = (float *)tface[cPoint->face_index].uv[edge1_index];
2164                         s_uv2 = (float *)tface[cPoint->face_index].uv[edge2_index];
2165                         t_uv1 = (float *)tface[target_face].uv[target_uv1];
2166                         t_uv2 = (float *)tface[target_face].uv[target_uv2];
2167
2168                         //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]);
2169
2170                         if (((s_uv1[0] == t_uv1[0] && s_uv1[1] == t_uv1[1]) &&
2171                              (s_uv2[0] == t_uv2[0] && s_uv2[1] == t_uv2[1]) ) ||
2172                             ((s_uv2[0] == t_uv1[0] && s_uv2[1] == t_uv1[1]) &&
2173                              (s_uv1[0] == t_uv2[0] && s_uv1[1] == t_uv2[1]) ))
2174                         {
2175                                 return ((px + neighX[n_index]) + w * (py + neighY[n_index]));
2176                         }
2177
2178                         /*
2179                          *      Find a point that is relatively at same edge position
2180                          *      on this other face UV
2181                          */
2182                         lambda = closest_to_line_v2(closest_point, pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]);
2183                         if (lambda < 0.0f) lambda = 0.0f;
2184                         if (lambda > 1.0f) lambda = 1.0f;
2185
2186                         sub_v2_v2v2(dir_vec, tface[target_face].uv[target_uv2], tface[target_face].uv[target_uv1]);
2187
2188                         mul_v2_fl(dir_vec, lambda);
2189
2190                         copy_v2_v2(pixel, tface[target_face].uv[target_uv1]);
2191                         add_v2_v2(pixel, dir_vec);
2192                         pixel[0] = (pixel[0] * (float)w) - 0.5f;
2193                         pixel[1] = (pixel[1] * (float)h) - 0.5f;
2194
2195                         final_pixel[0] = (int)floor(pixel[0]);
2196                         final_pixel[1] = (int)floor(pixel[1]);
2197
2198                         /* If current pixel uv is outside of texture    */
2199                         if (final_pixel[0] < 0 || final_pixel[0] >= w) return OUT_OF_TEXTURE;
2200                         if (final_pixel[1] < 0 || final_pixel[1] >= h) return OUT_OF_TEXTURE;
2201
2202                         final_index = final_pixel[0] + w * final_pixel[1];
2203
2204                         /* If we ended up to our origin point ( mesh has smaller than pixel sized faces)        */
2205                         if (final_index == (px + w * py)) return NOT_FOUND;
2206                         /* If found pixel still lies on wrong face ( mesh has smaller than pixel sized faces)   */
2207                         if (tempPoints[final_index].face_index != target_face) return NOT_FOUND;
2208
2209                         /*
2210                          *      If final point is an "edge pixel", use it's "real" neighbor instead
2211                          */
2212                         if (tempPoints[final_index].neighbour_pixel != -1) final_index = cPoint->neighbour_pixel;
2213
2214                         return final_index;
2215                 }
2216         }
2217 }
2218
2219 /*
2220  *      Create a surface for uv image sequence format
2221  */
2222 int dynamicPaint_createUVSurface(DynamicPaintSurface *surface)
2223 {
2224         /* Antialias jitter point relative coords       */
2225         float jitter5sample[10] =  {0.0f, 0.0f,
2226                                         -0.2f, -0.4f,
2227                                         0.2f, 0.4f,
2228                                         0.4f, -0.2f,
2229                                         -0.4f, 0.3f};
2230         int ty;
2231         int w, h;
2232         int numOfFaces;
2233         char uvname[MAX_CUSTOMDATA_LAYER_NAME];
2234         int active_points = 0;
2235         int error = 0;
2236
2237         PaintSurfaceData *sData;
2238         DynamicPaintCanvasSettings *canvas = surface->canvas;
2239         DerivedMesh *dm = canvas->dm;
2240
2241         PaintUVPoint *tempPoints = NULL;
2242         Vec3f *tempWeights = NULL;
2243         MFace *mface = NULL;
2244         MTFace *tface = NULL;
2245         Bounds2D *faceBB = NULL;
2246         int *final_index;
2247         int aa_samples;
2248
2249         if (!dm)
2250                 return setError(canvas, N_("Canvas mesh not updated"));
2251         if (surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ)
2252                 return setError(canvas, N_("Cannot bake non-'image sequence' formats"));
2253
2254         numOfFaces = dm->getNumTessFaces(dm);
2255         mface = dm->getTessFaceArray(dm);
2256
2257         /* get uv map */
2258         CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->uvlayer_name, uvname);
2259         tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname);
2260
2261         /* Check for validity   */
2262         if (!tface)
2263                 return setError(canvas, N_("No UV data on canvas"));
2264         if (surface->image_resolution < 16 || surface->image_resolution > 8192)
2265                 return setError(canvas, N_("Invalid resolution"));
2266
2267         w = h = surface->image_resolution;
2268
2269         /*
2270          *      Start generating the surface
2271          */
2272         printf("DynamicPaint: Preparing UV surface of %ix%i pixels and %i faces.\n", w, h, numOfFaces);
2273
2274         /* Init data struct */
2275         if (surface->data) dynamicPaint_freeSurfaceData(surface);
2276         sData = surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData");
2277         if (!surface->data)
2278                 return setError(canvas, N_("Not enough free memory"));
2279
2280         aa_samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1;
2281         tempPoints = (struct PaintUVPoint *) MEM_callocN(w * h * sizeof(struct PaintUVPoint), "Temp PaintUVPoint");
2282         if (!tempPoints) error = 1;
2283
2284         final_index = (int *) MEM_callocN(w * h * sizeof(int), "Temp UV Final Indexes");
2285         if (!final_index) error = 1;
2286
2287         tempWeights = (struct Vec3f *) MEM_mallocN(w * h * aa_samples * sizeof(struct Vec3f), "Temp bWeights");
2288         if (!tempWeights) error = 1;
2289
2290         /*
2291          *      Generate a temporary bounding box array for UV faces to optimize
2292          *      the pixel-inside-a-face search.
2293          */
2294         if (!error) {
2295                 faceBB = (struct Bounds2D *) MEM_mallocN(numOfFaces * sizeof(struct Bounds2D), "MPCanvasFaceBB");
2296                 if (!faceBB) error = 1;
2297         }
2298
2299         if (!error)
2300                 for (ty = 0; ty < numOfFaces; ty++) {
2301                         int numOfVert = (mface[ty].v4) ? 4 : 3;
2302                         int i;
2303
2304                         copy_v2_v2(faceBB[ty].min, tface[ty].uv[0]);
2305                         copy_v2_v2(faceBB[ty].max, tface[ty].uv[0]);
2306
2307                         for (i = 1; i < numOfVert; i++) {
2308                                 if (tface[ty].uv[i][0] < faceBB[ty].min[0]) faceBB[ty].min[0] = tface[ty].uv[i][0];
2309                                 if (tface[ty].uv[i][1] < faceBB[ty].min[1]) faceBB[ty].min[1] = tface[ty].uv[i][1];
2310                                 if (tface[ty].uv[i][0] > faceBB[ty].max[0]) faceBB[ty].max[0] = tface[ty].uv[i][0];
2311                                 if (tface[ty].uv[i][1] > faceBB[ty].max[1]) faceBB[ty].max[1] = tface[ty].uv[i][1];
2312
2313                         }
2314                 }
2315
2316         /*
2317          *      Loop through every pixel and check
2318          *      if pixel is uv-mapped on a canvas face.
2319          */
2320         if (!error) {
2321                 #pragma omp parallel for schedule(static)
2322                 for (ty = 0; ty < h; ty++) {
2323                         int tx;
2324                         for (tx = 0; tx < w; tx++) {
2325                                 int i, sample;
2326                                 int index = tx + w * ty;
2327                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2328
2329                                 short isInside = 0; /* if point is inside a uv face */
2330
2331                                 float d1[2], d2[2], d3[2], point[5][2];
2332                                 float dot00, dot01, dot02, dot11, dot12, invDenom, u, v;
2333
2334                                 /* Init per pixel settings */
2335                                 tPoint->face_index = -1;
2336                                 tPoint->neighbour_pixel = -1;
2337                                 tPoint->pixel_index = index;
2338
2339                                 /* Actual pixel center, used when collision is found    */
2340                                 point[0][0] = ((float)tx + 0.5f) / w;
2341                                 point[0][1] = ((float)ty + 0.5f) / h;
2342
2343                                 /*
2344                                  * A pixel middle sample isn't enough to find very narrow polygons
2345                                  * So using 4 samples of each corner too
2346                                  */
2347                                 point[1][0] = ((float)tx) / w;
2348                                 point[1][1] = ((float)ty) / h;
2349
2350                                 point[2][0] = ((float)tx + 1) / w;
2351                                 point[2][1] = ((float)ty) / h;
2352
2353                                 point[3][0] = ((float)tx) / w;
2354                                 point[3][1] = ((float)ty + 1) / h;
2355
2356                                 point[4][0] = ((float)tx + 1) / w;
2357                                 point[4][1] = ((float)ty + 1) / h;
2358
2359
2360                                 /* Loop through samples, starting from middle point     */
2361                                 for (sample = 0; sample < 5; sample++) {
2362                                         
2363                                         /* Loop through every face in the mesh  */
2364                                         for (i = 0; i < numOfFaces; i++) {
2365
2366                                                 /* Check uv bb  */
2367                                                 if (faceBB[i].min[0] > (point[sample][0])) continue;
2368                                                 if (faceBB[i].min[1] > (point[sample][1])) continue;
2369                                                 if (faceBB[i].max[0] < (point[sample][0])) continue;
2370                                                 if (faceBB[i].max[1] < (point[sample][1])) continue;
2371
2372                                                 /*  Calculate point inside a triangle check
2373                                                  *      for uv0, 1, 2 */
2374                                                 sub_v2_v2v2(d1,  tface[i].uv[2], tface[i].uv[0]);   // uv2 - uv0
2375                                                 sub_v2_v2v2(d2,  tface[i].uv[1], tface[i].uv[0]);   // uv1 - uv0
2376                                                 sub_v2_v2v2(d3,  point[sample], tface[i].uv[0]);    // point - uv0
2377
2378                                                 dot00 = d1[0] * d1[0] + d1[1] * d1[1];
2379                                                 dot01 = d1[0] * d2[0] + d1[1] * d2[1];
2380                                                 dot02 = d1[0] * d3[0] + d1[1] * d3[1];
2381                                                 dot11 = d2[0] * d2[0] + d2[1] * d2[1];
2382                                                 dot12 = d2[0] * d3[0] + d2[1] * d3[1];
2383
2384                                                 invDenom = (dot00 * dot11 - dot01 * dot01);
2385                                                 invDenom = invDenom ? 1.0f / invDenom : 1.0f;
2386                                                 u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2387                                                 v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2388
2389                                                 if ((u > 0) && (v > 0) && (u + v < 1)) { isInside = 1; } /* is inside a triangle */
2390
2391                                                 /*  If collision wasn't found but the face is a quad
2392                                                  *      do another check for the second half */
2393                                                 if ((!isInside) && mface[i].v4) {
2394
2395                                                         /* change d2 to test the other half     */
2396                                                         sub_v2_v2v2(d2,  tface[i].uv[3], tface[i].uv[0]);   // uv3 - uv0
2397
2398                                                         /* test again   */
2399                                                         dot00 = d1[0] * d1[0] + d1[1] * d1[1];
2400                                                         dot01 = d1[0] * d2[0] + d1[1] * d2[1];
2401                                                         dot02 = d1[0] * d3[0] + d1[1] * d3[1];
2402                                                         dot11 = d2[0] * d2[0] + d2[1] * d2[1];
2403                                                         dot12 = d2[0] * d3[0] + d2[1] * d3[1];
2404
2405                                                         invDenom = (dot00 * dot11 - dot01 * dot01);
2406                                                         invDenom = invDenom ? 1.0f / invDenom : 1.0f;
2407                                                         u = (dot11 * dot02 - dot01 * dot12) * invDenom;
2408                                                         v = (dot00 * dot12 - dot01 * dot02) * invDenom;
2409
2410                                                         if ((u > 0) && (v > 0) && (u + v < 1)) { isInside = 2; } /* is inside the second half of the quad */
2411
2412                                                 }
2413
2414                                                 /*
2415                                                  *      If point was inside the face
2416                                                  */
2417                                                 if (isInside != 0) {
2418
2419                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2420                                                         int j;
2421
2422                                                         /* Get triagnle uvs     */
2423                                                         if (isInside == 1) {
2424                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2425                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2426                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2427                                                         }
2428                                                         else {
2429                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2430                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2431                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2432                                                         }
2433
2434                                                         /* Add b-weights per anti-aliasing sample       */
2435                                                         for (j = 0; j < aa_samples; j++) {
2436                                                                 uv[0] = point[0][0] + jitter5sample[j * 2] / w;
2437                                                                 uv[1] = point[0][1] + jitter5sample[j * 2 + 1] / h;
2438
2439                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index * aa_samples + j].v);
2440                                                         }
2441
2442                                                         /* Set surface point face values        */
2443                                                         tPoint->face_index = i;                         /* face index */
2444                                                         tPoint->quad = (isInside == 2) ? 1 : 0;     /* quad or tri part*/
2445
2446                                                         /* save vertex indexes  */
2447                                                         tPoint->v1 = mface[i].v1;
2448                                                         tPoint->v2 = (isInside == 2) ? mface[i].v3 : mface[i].v2;
2449                                                         tPoint->v3 = (isInside == 2) ? mface[i].v4 : mface[i].v3;
2450
2451                                                         sample = 5; /* make sure we exit sample loop as well */
2452                                                         break;
2453                                                 }
2454                                         }
2455                                 } /* sample loop */
2456                         }
2457                 }
2458
2459                 /*
2460                  *      Now loop through every pixel that was left without index
2461                  *      and find if they have neighboring pixels that have an index.
2462                  *      If so use that polygon as pixel surface.
2463                  *      (To avoid seams on uv island edges)
2464                  */
2465                 #pragma omp parallel for schedule(static)
2466                 for (ty = 0; ty < h; ty++) {
2467                         int tx;
2468                         for (tx = 0; tx < w; tx++) {
2469                                 int index = tx + w * ty;
2470                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2471
2472                                 /* If point isn't't on canvas mesh      */
2473                                 if (tPoint->face_index == -1) {
2474                                         int u_min, u_max, v_min, v_max;
2475                                         int u, v, ind;
2476                                         float point[2];
2477
2478                                         /* get loop area        */
2479                                         u_min = (tx > 0) ? -1 : 0;
2480                                         u_max = (tx < (w - 1)) ? 1 : 0;
2481                                         v_min = (ty > 0) ? -1 : 0;
2482                                         v_max = (ty < (h - 1)) ? 1 : 0;
2483
2484                                         point[0] = ((float)tx + 0.5f) / w;
2485                                         point[1] = ((float)ty + 0.5f) / h;
2486
2487                                         /* search through defined area for neighbor     */
2488                                         for (u = u_min; u <= u_max; u++)
2489                                                 for (v = v_min; v <= v_max; v++) {
2490                                                         /* if not this pixel itself     */
2491                                                         if (u != 0 || v != 0) {
2492                                                                 ind = (tx + u) + w * (ty + v);
2493
2494                                                                 /* if neighbor has index        */
2495                                                                 if (tempPoints[ind].face_index != -1) {
2496
2497                                                                         float uv1co[2], uv2co[2], uv3co[2], uv[2];
2498                                                                         int i = tempPoints[ind].face_index, j;
2499
2500                                                                         /* Now calculate pixel data for this pixel as it was on polygon surface */
2501                                                                         if (!tempPoints[ind].quad) {
2502                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2503                                                                                 copy_v2_v2(uv2co, tface[i].uv[1]);
2504                                                                                 copy_v2_v2(uv3co, tface[i].uv[2]);
2505                                                                         }
2506                                                                         else {
2507                                                                                 copy_v2_v2(uv1co, tface[i].uv[0]);
2508                                                                                 copy_v2_v2(uv2co, tface[i].uv[2]);
2509                                                                                 copy_v2_v2(uv3co, tface[i].uv[3]);
2510                                                                         }
2511
2512                                                                         /* Add b-weights per anti-aliasing sample       */
2513                                                                         for (j = 0; j < aa_samples; j++) {
2514
2515                                                                                 uv[0] = point[0] + jitter5sample[j * 2] / w;
2516                                                                                 uv[1] = point[1] + jitter5sample[j * 2 + 1] / h;
2517                                                                                 barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index * aa_samples + j].v);
2518                                                                         }
2519
2520                                                                         /* Set values   */
2521                                                                         tPoint->neighbour_pixel = ind;              // face index
2522                                                                         tPoint->quad = tempPoints[ind].quad;        // quad or tri
2523
2524                                                                         /* save vertex indexes  */
2525                                                                         tPoint->v1 = mface[i].v1;
2526                                                                         tPoint->v2 = (tPoint->quad) ? mface[i].v3 : mface[i].v2;
2527                                                                         tPoint->v3 = (tPoint->quad) ? mface[i].v4 : mface[i].v3;
2528
2529                                                                         u = u_max + 1;  /* make sure we exit outer loop as well */
2530                                                                         break;
2531                                                                 }
2532                                                         }
2533                                                 }
2534                                 }
2535                         }
2536                 }
2537
2538                 /*
2539                  *      When base loop is over convert found neighbor indexes to real ones
2540                  *      Also count the final number of active surface points
2541                  */
2542                 for (ty = 0; ty < h; ty++) {
2543                         int tx;
2544                         for (tx = 0; tx < w; tx++) {
2545                                 int index = tx + w * ty;
2546                                 PaintUVPoint *tPoint = (&tempPoints[index]);
2547
2548                                 if (tPoint->face_index == -1 && tPoint->neighbour_pixel != -1) tPoint->face_index = tempPoints[tPoint->neighbour_pixel].face_index;
2549                                 if (tPoint->face_index != -1) active_points++;
2550                         }
2551                 }
2552
2553                 /*      Generate surface adjacency data. */
2554                 {
2555                         int i, cursor = 0;
2556
2557                         /* Create a temporary array of final indexes (before unassigned
2558                          *  pixels have been dropped) */
2559                         for (i = 0; i < w * h; i++) {
2560                                 if (tempPoints[i].face_index != -1) {
2561                                         final_index[i] = cursor;
2562                                         cursor++;
2563                                 }
2564                         }
2565                         /* allocate memory */
2566                         sData->total_points = w * h;
2567                         dynamicPaint_initAdjacencyData(surface, 1);
2568
2569                         if (sData->adj_data) {
2570                                 PaintAdjData *ed = sData->adj_data;
2571                                 unsigned int n_pos = 0;
2572                                 for (ty = 0; ty < h; ty++) {
2573                                         int tx;
2574                                         for (tx = 0; tx < w; tx++) {
2575                                                 int i, index = tx + w * ty;
2576
2577                                                 if (tempPoints[index].face_index != -1) {
2578                                                         ed->n_index[final_index[index]] = n_pos;
2579                                                         ed->n_num[final_index[index]] = 0;
2580
2581                                                         for (i = 0; i < 8; i++) {
2582
2583                                                                 /* Try to find a neighboring pixel in defined direction
2584                                                                  *  If not found, -1 is returned */
2585                                                                 int n_target = dynamicPaint_findNeighbourPixel(tempPoints, dm, uvname, w, h, tx, ty, i);
2586
2587                                                                 if (n_target >= 0) {
2588                                                                         ed->n_target[n_pos] = final_index[n_target];
2589                                                                         ed->n_num[final_index[index]]++;
2590                                                                         n_pos++;
2591                                                                 }
2592                                                                 else if (n_target == ON_MESH_EDGE || n_target == OUT_OF_TEXTURE) {
2593                                                                         ed->flags[final_index[index]] |= ADJ_ON_MESH_EDGE;
2594                                                                 }
2595                                                         }
2596                                                 }
2597                                         }
2598                                 }
2599                         }
2600                 }
2601
2602                 /* Create final surface data without inactive points */
2603                 {
2604                         ImgSeqFormatData *f_data = MEM_callocN(sizeof(struct ImgSeqFormatData), "ImgSeqFormatData");
2605                         if (f_data) {
2606                                 f_data->uv_p = MEM_callocN(active_points * sizeof(struct PaintUVPoint), "PaintUVPoint");
2607                                 f_data->barycentricWeights = MEM_callocN(active_points * aa_samples * sizeof(struct Vec3f), "PaintUVPoint");
2608
2609                                 if (!f_data->uv_p || !f_data->barycentricWeights) error = 1;
2610                         }
2611                         else {
2612                                 error = 1;
2613                         }
2614
2615                         sData->total_points = active_points;
2616                         
2617                         /* in case of allocation error, free everything */
2618                         if (error) {
2619                                 if (f_data) {
2620                                         if (f_data->uv_p) MEM_freeN(f_data->uv_p);
2621                                         if (f_data->barycentricWeights) MEM_freeN(f_data->barycentricWeights);
2622                                         MEM_freeN(f_data);
2623                                 }
2624                         }
2625                         else {
2626                                 int index, cursor = 0;
2627                                 sData->total_points = active_points;
2628                                 sData->format_data = f_data;
2629
2630                                 for (index = 0; index < (w * h); index++) {
2631                                         if (tempPoints[index].face_index != -1) {
2632                                                 memcpy(&f_data->uv_p[cursor], &tempPoints[index], sizeof(PaintUVPoint));
2633                                                 memcpy(&f_data->barycentricWeights[cursor * aa_samples], &tempWeights[index * aa_samples], sizeof(Vec3f) * aa_samples);
2634                                                 cursor++;
2635                                         }
2636                                 }
2637                         }
2638                 }
2639         }
2640         if (error == 1)
2641                 setError(canvas, N_("Not enough free memory"));
2642
2643         if (faceBB) MEM_freeN(faceBB);
2644         if (tempPoints) MEM_freeN(tempPoints);
2645         if (tempWeights) MEM_freeN(tempWeights);
2646         if (final_index) MEM_freeN(final_index);
2647
2648         /* Init surface type data */
2649         if (!error) {
2650                 dynamicPaint_allocateSurfaceType(surface);
2651
2652 #if 0
2653                 /*  -----------------------------------------------------------------
2654                  *      For debug, output pixel statuses to the color map
2655                  *      -----------------------------------------------------------------*/
2656                 #pragma omp parallel for schedule(static)
2657                 for (index = 0; index < sData->total_points; index++)
2658                 {
2659                         ImgSeqFormatData *f_data = (ImgSeqFormatData *)sData->format_data;
2660                         PaintUVPoint *uvPoint = &((PaintUVPoint *)f_data->uv_p)[index];
2661                         PaintPoint *pPoint = &((PaintPoint *)sData->type_data)[index];
2662                         pPoint->alpha = 1.0f;
2663
2664                         /* Every pixel that is assigned as "edge pixel" gets blue color */
2665                         if (uvPoint->neighbour_pixel != -1) pPoint->color[2] = 1.0f;
2666                         /* and every pixel that finally got an polygon gets red color   */
2667                         if (uvPoint->face_index != -1) pPoint->color[0] = 1.0f;
2668                         /* green color shows pixel face index hash      */
2669                         if (uvPoint->face_index != -1) pPoint->color[1] = (float)(uvPoint->face_index % 255) / 256.0f;
2670                 }
2671
2672 #endif
2673                 dynamicPaint_setInitialColor(surface);
2674         }
2675
2676         return (error == 0);
2677 }
2678
2679 /*
2680  *      Outputs an image file from uv surface data.
2681  */
2682 void dynamicPaint_outputSurfaceImage(DynamicPaintSurface *surface, char *filename, short output_layer)
2683 {
2684         int index;
2685         ImBuf *ibuf = NULL;
2686         PaintSurfaceData *sData = surface->data;
2687         ImgSeqFormatData *f_data = (ImgSeqFormatData *)sData->format_data;
2688         /* OpenEXR or PNG       */
2689         int format = (surface->image_fileformat & MOD_DPAINT_IMGFORMAT_OPENEXR) ? R_IMF_IMTYPE_OPENEXR : R_IMF_IMTYPE_PNG;
2690         char output_file[FILE_MAX];
2691
2692         if (!sData->type_data) {
2693                 setError(surface->canvas, N_("Image save failed: invalid surface"));
2694                 return;
2695         }
2696         /* if selected format is openexr, but current build doesnt support one */
2697         #ifndef WITH_OPENEXR
2698         if (format == R_IMF_IMTYPE_OPENEXR) format = R_IMF_IMTYPE_PNG;
2699         #endif
2700         BLI_strncpy(output_file, filename, sizeof(output_file));
2701         BKE_add_image_extension_from_type(output_file, format);
2702
2703         /* Validate output file path    */
2704         BLI_path_abs(output_file, G.main->name);
2705         BLI_make_existing_file(output_file);
2706
2707         /* Init image buffer    */
2708         ibuf = IMB_allocImBuf(surface->image_resolution, surface->image_resolution, 32, IB_rectfloat);
2709         if (ibuf == NULL) {
2710                 setError(surface->canvas, N_("Image save failed: not enough free memory"));
2711                 return;
2712         }
2713
2714         #pragma omp parallel for schedule(static)
2715         for (index = 0; index < sData->total_points; index++) {
2716                 int pos = f_data->uv_p[index].pixel_index * 4;  /* image buffer position */
2717
2718                 /* Set values of preferred type */
2719                 if (output_layer == 1) {
2720                         /* wetmap */
2721                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2722                                 PaintPoint *point = &((PaintPoint *)sData->type_data)[index];
2723                                 float value = (point->wetness > 1.0f) ? 1.0f : point->wetness;
2724
2725                                 ibuf->rect_float[pos] = value;
2726                                 ibuf->rect_float[pos + 1] = value;
2727                                 ibuf->rect_float[pos + 2] = value;
2728                                 ibuf->rect_float[pos + 3] = 1.0f;
2729                         }
2730                 }
2731                 else if (output_layer == 0) {
2732                         /* Paintmap */
2733                         if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) {
2734                                 PaintPoint *point = &((PaintPoint *)sData->type_data)[index];
2735
2736                                 /* blend wet and dry layers */
2737                                 blendColors(point->color, point->alpha, point->e_color, point->e_alpha, &ibuf->rect_float[pos]);
2738
2739                                 /* Multiply color by alpha if enabled   */
2740                                 if (surface->flags & MOD_DPAINT_MULALPHA) {
2741                                         ibuf->rect_float[pos]   *= ibuf->rect_float[pos + 3];
2742                                         ibuf->rect_float[pos + 1] *= ibuf->rect_float[pos + 3];
2743                                         ibuf->rect_float[pos + 2] *= ibuf->rect_float[pos + 3];
2744                                 }
2745                         }
2746                         /* displace */
2747                         else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) {
2748                                 float depth = ((float *)sData->type_data)[index];
2749                                 if (surface->depth_clamp)
2750                                         depth /= surface->depth_clamp;
2751
2752                                 if (surface->disp_type == MOD_DPAINT_DISP_DISPLACE) {
2753                                         depth = (0.5f - depth / 2.0f);
2754                                 }
2755
2756                                 CLAMP(depth, 0.0f, 1.0f);
2757
2758                                 ibuf->rect_float[pos] = depth;
2759                                 ibuf->rect_float[pos + 1] = depth;
2760                                 ibuf->rect_float[pos + 2] = depth;
2761                                 ibuf->rect_float[pos + 3] = 1.0f;
2762                         }
2763                         /* waves */
2764                         else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) {
2765                                 PaintWavePoint *wPoint = &((PaintWavePoint *)sData->type_data)[index];
2766                                 float depth = wPoint->height;
2767                                 if (surface->depth_clamp)
2768                                         depth /= surface->depth_clamp;
2769                                 depth = (0.5f + depth / 2.0f);
2770                                 CLAMP(depth, 0.0f, 1.0f);
2771
2772                                 ibuf->rect_float[pos] = depth;
2773                                 ibuf->rect_float[pos + 1] = depth;
2774                                 ibuf->rect_float[pos + 2] = depth;
2775                                 ibuf->rect_float[pos + 3] = 1.0f;
2776                         }
2777                 }
2778         }
2779
2780         /* Set output format, png in case exr isn't supported */
2781         ibuf->ftype = PNG | 95;
2782 #ifdef WITH_OPENEXR
2783         if (format == R_IMF_IMTYPE_OPENEXR) {   /* OpenEXR 32-bit float */
2784                 ibuf->ftype = OPENEXR | OPENEXR_COMPRESS;