Merging r50192 through r50223 from trunk into soc-2011-tomato
[blender-staging.git] / source / blender / editors / sculpt_paint / paint_utils.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  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
19  * All rights reserved.
20  *
21  * The Original Code is: all of this file.
22  *
23  * Contributor(s): none yet.
24  *
25  * ***** END GPL LICENSE BLOCK *****
26  */
27
28 /** \file blender/editors/sculpt_paint/paint_utils.c
29  *  \ingroup edsculpt
30  */
31
32 #include <math.h>
33 #include <stdlib.h>
34
35 #include "DNA_mesh_types.h"
36 #include "DNA_meshdata_types.h"
37 #include "DNA_object_types.h"
38
39 #include "DNA_scene_types.h"
40 #include "DNA_brush_types.h"
41
42 #include "BLI_math.h"
43 #include "BLI_utildefines.h"
44 #include "BLI_rect.h"
45
46 #include "BKE_brush.h"
47 #include "BKE_context.h"
48 #include "BKE_DerivedMesh.h"
49 #include "BKE_paint.h"
50
51 #include "RNA_access.h"
52 #include "RNA_define.h"
53
54 #include "BIF_gl.h"
55 /* TODO: remove once projectf goes away */
56 #include "BIF_glutil.h"
57
58 #include "RE_shader_ext.h"
59
60 #include "ED_view3d.h"
61 #include "ED_screen.h"
62
63 #include "BLO_sys_types.h"
64 #include "ED_mesh.h" /* for face mask functions */
65
66 #include "WM_api.h"
67 #include "WM_types.h"
68
69 #include "paint_intern.h"
70
71 /* Convert the object-space axis-aligned bounding box (expressed as
72  * its minimum and maximum corners) into a screen-space rectangle,
73  * returns zero if the result is empty */
74 int paint_convert_bb_to_rect(rcti *rect,
75                              const float bb_min[3],
76                              const float bb_max[3],
77                              const ARegion *ar,
78                              RegionView3D *rv3d,
79                              Object *ob)
80 {
81         float projection_mat[4][4];
82         int i, j, k;
83
84         BLI_rcti_init_minmax(rect);
85
86         /* return zero if the bounding box has non-positive volume */
87         if (bb_min[0] > bb_max[0] || bb_min[1] > bb_max[1] || bb_min[2] > bb_max[2])
88                 return 0;
89
90         ED_view3d_ob_project_mat_get(rv3d, ob, projection_mat);
91
92         for (i = 0; i < 2; ++i) {
93                 for (j = 0; j < 2; ++j) {
94                         for (k = 0; k < 2; ++k) {
95                                 float vec[3], proj[2];
96                                 int proj_i[2];
97                                 vec[0] = i ? bb_min[0] : bb_max[0];
98                                 vec[1] = j ? bb_min[1] : bb_max[1];
99                                 vec[2] = k ? bb_min[2] : bb_max[2];
100                                 /* convert corner to screen space */
101                                 ED_view3d_project_float_v2(ar, vec, proj, projection_mat);
102                                 /* expand 2D rectangle */
103
104                                 /* we could project directly to int? */
105                                 proj_i[0] = proj[0];
106                                 proj_i[1] = proj[1];
107
108                                 BLI_rcti_do_minmax_v(rect, proj_i);
109                         }
110                 }
111         }
112
113         /* return false if the rectangle has non-positive area */
114         return rect->xmin < rect->xmax && rect->ymin < rect->ymax;
115 }
116
117 /* Get four planes in object-space that describe the projection of
118  * screen_rect from screen into object-space (essentially converting a
119  * 2D screens-space bounding box into four 3D planes) */
120 void paint_calc_redraw_planes(float planes[4][4],
121                               const ARegion *ar,
122                               RegionView3D *rv3d,
123                               Object *ob,
124                               const rcti *screen_rect)
125 {
126         BoundBox bb;
127         bglMats mats;
128         rcti rect;
129
130         memset(&bb, 0, sizeof(BoundBox));
131         view3d_get_transformation(ar, rv3d, ob, &mats);
132
133         /* use some extra space just in case */
134         rect = *screen_rect;
135         rect.xmin -= 2;
136         rect.xmax += 2;
137         rect.ymin -= 2;
138         rect.ymax += 2;
139
140         ED_view3d_calc_clipping(&bb, planes, &mats, &rect);
141         mul_m4_fl(planes, -1.0f);
142 }
143
144 /* convert a point in model coordinates to 2D screen coordinates */
145 /* TODO: can be deleted once all calls are replaced with
146  * view3d_project_float() */
147 void projectf(bglMats *mats, const float v[3], float p[2])
148 {
149         double ux, uy, uz;
150
151         gluProject(v[0], v[1], v[2], mats->modelview, mats->projection,
152                    (GLint *)mats->viewport, &ux, &uy, &uz);
153         p[0] = ux;
154         p[1] = uy;
155 }
156
157 float paint_calc_object_space_radius(ViewContext *vc, const float center[3],
158                                      float pixel_radius)
159 {
160         Object *ob = vc->obact;
161         float delta[3], scale, loc[3];
162         float mval_f[2];
163
164         mul_v3_m4v3(loc, ob->obmat, center);
165
166         initgrabz(vc->rv3d, loc[0], loc[1], loc[2]);
167
168         mval_f[0] = pixel_radius;
169         mval_f[1] = 0.0f;
170         ED_view3d_win_to_delta(vc->ar, mval_f, delta);
171
172         scale = fabsf(mat4_to_scale(ob->obmat));
173         scale = (scale == 0.0f) ? 1.0f : scale;
174
175         return len_v3(delta) / scale;
176 }
177
178 float paint_get_tex_pixel(Brush *br, float u, float v)
179 {
180         TexResult texres = {0};
181         float co[3] = {u, v, 0.0f};
182         int hasrgb;
183
184         hasrgb = multitex_ext(br->mtex.tex, co, NULL, NULL, 0, &texres);
185
186         if (hasrgb & TEX_RGB)
187                 texres.tin = rgb_to_grayscale(&texres.tr) * texres.ta;
188
189         return texres.tin;
190 }
191
192 /* 3D Paint */
193
194 static void imapaint_project(Object *ob, float model[][4], float proj[][4], const float co[3], float pco[4])
195 {
196         copy_v3_v3(pco, co);
197         pco[3] = 1.0f;
198
199         mul_m4_v3(ob->obmat, pco);
200         mul_m4_v3(model, pco);
201         mul_m4_v4(proj, pco);
202 }
203
204 static void imapaint_tri_weights(Object *ob,
205                                  const float v1[3], const float v2[3], const float v3[3],
206                                  const float co[3], float w[3])
207 {
208         float pv1[4], pv2[4], pv3[4], h[3], divw;
209         float model[4][4], proj[4][4], wmat[3][3], invwmat[3][3];
210         GLint view[4];
211
212         /* compute barycentric coordinates */
213
214         /* get the needed opengl matrices */
215         glGetIntegerv(GL_VIEWPORT, view);
216         glGetFloatv(GL_MODELVIEW_MATRIX,  (float *)model);
217         glGetFloatv(GL_PROJECTION_MATRIX, (float *)proj);
218         view[0] = view[1] = 0;
219
220         /* project the verts */
221         imapaint_project(ob, model, proj, v1, pv1);
222         imapaint_project(ob, model, proj, v2, pv2);
223         imapaint_project(ob, model, proj, v3, pv3);
224
225         /* do inverse view mapping, see gluProject man page */
226         h[0] = (co[0] - view[0]) * 2.0f / view[2] - 1;
227         h[1] = (co[1] - view[1]) * 2.0f / view[3] - 1;
228         h[2] = 1.0f;
229
230         /* solve for (w1,w2,w3)/perspdiv in:
231          * h * perspdiv = Project * Model * (w1 * v1 + w2 * v2 + w3 * v3) */
232
233         wmat[0][0] = pv1[0];  wmat[1][0] = pv2[0];  wmat[2][0] = pv3[0];
234         wmat[0][1] = pv1[1];  wmat[1][1] = pv2[1];  wmat[2][1] = pv3[1];
235         wmat[0][2] = pv1[3];  wmat[1][2] = pv2[3];  wmat[2][2] = pv3[3];
236
237         invert_m3_m3(invwmat, wmat);
238         mul_m3_v3(invwmat, h);
239
240         copy_v3_v3(w, h);
241
242         /* w is still divided by perspdiv, make it sum to one */
243         divw = w[0] + w[1] + w[2];
244         if (divw != 0.0f) {
245                 mul_v3_fl(w, 1.0f / divw);
246         }
247 }
248
249 /* compute uv coordinates of mouse in face */
250 void imapaint_pick_uv(Scene *scene, Object *ob, unsigned int faceindex, const int xy[2], float uv[2])
251 {
252         DerivedMesh *dm = mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH);
253         const int *index = dm->getTessFaceDataArray(dm, CD_ORIGINDEX);
254         MTFace *tface = dm->getTessFaceDataArray(dm, CD_MTFACE), *tf;
255         int numfaces = dm->getNumTessFaces(dm), a, findex;
256         float p[2], w[3], absw, minabsw;
257         MFace mf;
258         MVert mv[4];
259
260         minabsw = 1e10;
261         uv[0] = uv[1] = 0.0;
262
263         /* test all faces in the derivedmesh with the original index of the picked face */
264         for (a = 0; a < numfaces; a++) {
265                 findex = index ? index[a] : a;
266
267                 if (findex == faceindex) {
268                         dm->getTessFace(dm, a, &mf);
269
270                         dm->getVert(dm, mf.v1, &mv[0]);
271                         dm->getVert(dm, mf.v2, &mv[1]);
272                         dm->getVert(dm, mf.v3, &mv[2]);
273                         if (mf.v4)
274                                 dm->getVert(dm, mf.v4, &mv[3]);
275
276                         tf = &tface[a];
277
278                         p[0] = xy[0];
279                         p[1] = xy[1];
280
281                         if (mf.v4) {
282                                 /* the triangle with the largest absolute values is the one
283                                  * with the most negative weights */
284                                 imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[3].co, p, w);
285                                 absw = fabsf(w[0]) + fabsf(w[1]) + fabsf(w[2]);
286                                 if (absw < minabsw) {
287                                         uv[0] = tf->uv[0][0] * w[0] + tf->uv[1][0] * w[1] + tf->uv[3][0] * w[2];
288                                         uv[1] = tf->uv[0][1] * w[0] + tf->uv[1][1] * w[1] + tf->uv[3][1] * w[2];
289                                         minabsw = absw;
290                                 }
291
292                                 imapaint_tri_weights(ob, mv[1].co, mv[2].co, mv[3].co, p, w);
293                                 absw = fabsf(w[0]) + fabsf(w[1]) + fabsf(w[2]);
294                                 if (absw < minabsw) {
295                                         uv[0] = tf->uv[1][0] * w[0] + tf->uv[2][0] * w[1] + tf->uv[3][0] * w[2];
296                                         uv[1] = tf->uv[1][1] * w[0] + tf->uv[2][1] * w[1] + tf->uv[3][1] * w[2];
297                                         minabsw = absw;
298                                 }
299                         }
300                         else {
301                                 imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[2].co, p, w);
302                                 absw = fabsf(w[0]) + fabsf(w[1]) + fabsf(w[2]);
303                                 if (absw < minabsw) {
304                                         uv[0] = tf->uv[0][0] * w[0] + tf->uv[1][0] * w[1] + tf->uv[2][0] * w[2];
305                                         uv[1] = tf->uv[0][1] * w[0] + tf->uv[1][1] * w[1] + tf->uv[2][1] * w[2];
306                                         minabsw = absw;
307                                 }
308                         }
309                 }
310         }
311
312         dm->release(dm);
313 }
314
315 /* returns 0 if not found, otherwise 1 */
316 int imapaint_pick_face(ViewContext *vc, const int mval[2], unsigned int *index, unsigned int totface)
317 {
318         if (totface == 0)
319                 return 0;
320
321         /* sample only on the exact position */
322         *index = view3d_sample_backbuf(vc, mval[0], mval[1]);
323
324         if ((*index) <= 0 || (*index) > (unsigned int)totface) {
325                 return 0;
326         }
327
328         (*index)--;
329         
330         return 1;
331 }
332
333 /* used for both 3d view and image window */
334 void paint_sample_color(const bContext *C, ARegion *ar, int x, int y)    /* frontbuf */
335 {
336         Brush *br = paint_brush(paint_get_active_from_context(C));
337         unsigned int col;
338         char *cp;
339
340         CLAMP(x, 0, ar->winx);
341         CLAMP(y, 0, ar->winy);
342         
343         glReadBuffer(GL_FRONT);
344         glReadPixels(x + ar->winrct.xmin, y + ar->winrct.ymin, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &col);
345         glReadBuffer(GL_BACK);
346
347         cp = (char *)&col;
348         
349         if (br) {
350                 br->rgb[0] = cp[0] / 255.0f;
351                 br->rgb[1] = cp[1] / 255.0f;
352                 br->rgb[2] = cp[2] / 255.0f;
353         }
354 }
355
356 static int brush_curve_preset_exec(bContext *C, wmOperator *op)
357 {
358         Brush *br = paint_brush(paint_get_active_from_context(C));
359         BKE_brush_curve_preset(br, RNA_enum_get(op->ptr, "shape"));
360
361         return OPERATOR_FINISHED;
362 }
363
364 static int brush_curve_preset_poll(bContext *C)
365 {
366         Brush *br = paint_brush(paint_get_active_from_context(C));
367
368         return br && br->curve;
369 }
370
371 void BRUSH_OT_curve_preset(wmOperatorType *ot)
372 {
373         static EnumPropertyItem prop_shape_items[] = {
374                 {CURVE_PRESET_SHARP, "SHARP", 0, "Sharp", ""},
375                 {CURVE_PRESET_SMOOTH, "SMOOTH", 0, "Smooth", ""},
376                 {CURVE_PRESET_MAX, "MAX", 0, "Max", ""},
377                 {CURVE_PRESET_LINE, "LINE", 0, "Line", ""},
378                 {CURVE_PRESET_ROUND, "ROUND", 0, "Round", ""},
379                 {CURVE_PRESET_ROOT, "ROOT", 0, "Root", ""},
380                 {0, NULL, 0, NULL, NULL}};
381
382         ot->name = "Preset";
383         ot->description = "Set brush shape";
384         ot->idname = "BRUSH_OT_curve_preset";
385
386         ot->exec = brush_curve_preset_exec;
387         ot->poll = brush_curve_preset_poll;
388
389         RNA_def_enum(ot->srna, "shape", prop_shape_items, CURVE_PRESET_SMOOTH, "Mode", "");
390 }
391
392
393 /* face-select ops */
394 static int paint_select_linked_exec(bContext *C, wmOperator *UNUSED(op))
395 {
396         paintface_select_linked(C, CTX_data_active_object(C), NULL, 2);
397         ED_region_tag_redraw(CTX_wm_region(C));
398         return OPERATOR_FINISHED;
399 }
400
401 void PAINT_OT_face_select_linked(wmOperatorType *ot)
402 {
403         ot->name = "Select Linked";
404         ot->description = "Select linked faces";
405         ot->idname = "PAINT_OT_face_select_linked";
406
407         ot->exec = paint_select_linked_exec;
408         ot->poll = facemask_paint_poll;
409
410         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
411 }
412
413 static int paint_select_linked_pick_invoke(bContext *C, wmOperator *op, wmEvent *event)
414 {
415         int mode = RNA_boolean_get(op->ptr, "extend") ? 1 : 0;
416         paintface_select_linked(C, CTX_data_active_object(C), event->mval, mode);
417         ED_region_tag_redraw(CTX_wm_region(C));
418         return OPERATOR_FINISHED;
419 }
420
421 void PAINT_OT_face_select_linked_pick(wmOperatorType *ot)
422 {
423         ot->name = "Select Linked Pick";
424         ot->description = "Select linked faces";
425         ot->idname = "PAINT_OT_face_select_linked_pick";
426
427         ot->invoke = paint_select_linked_pick_invoke;
428         ot->poll = facemask_paint_poll;
429
430         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
431
432         RNA_def_boolean(ot->srna, "extend", 0, "Extend", "Extend the existing selection");
433 }
434
435
436 static int face_select_all_exec(bContext *C, wmOperator *op)
437 {
438         Object *ob = CTX_data_active_object(C);
439         paintface_deselect_all_visible(ob, RNA_enum_get(op->ptr, "action"), TRUE);
440         ED_region_tag_redraw(CTX_wm_region(C));
441         return OPERATOR_FINISHED;
442 }
443
444
445 void PAINT_OT_face_select_all(wmOperatorType *ot)
446 {
447         ot->name = "Face Selection";
448         ot->description = "Change selection for all faces";
449         ot->idname = "PAINT_OT_face_select_all";
450
451         ot->exec = face_select_all_exec;
452         ot->poll = facemask_paint_poll;
453
454         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
455
456         WM_operator_properties_select_all(ot);
457 }
458
459
460 static int vert_select_all_exec(bContext *C, wmOperator *op)
461 {
462         Object *ob = CTX_data_active_object(C);
463         paintvert_deselect_all_visible(ob, RNA_enum_get(op->ptr, "action"), TRUE);
464         ED_region_tag_redraw(CTX_wm_region(C));
465         return OPERATOR_FINISHED;
466 }
467
468
469 void PAINT_OT_vert_select_all(wmOperatorType *ot)
470 {
471         ot->name = "Vertex Selection";
472         ot->description = "Change selection for all vertices";
473         ot->idname = "PAINT_OT_vert_select_all";
474
475         ot->exec = vert_select_all_exec;
476         ot->poll = vert_paint_poll;
477
478         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
479
480         WM_operator_properties_select_all(ot);
481 }
482
483 static int vert_select_inverse_exec(bContext *C, wmOperator *UNUSED(op))
484 {
485         Object *ob = CTX_data_active_object(C);
486         paintvert_deselect_all_visible(ob, SEL_INVERT, TRUE);
487         ED_region_tag_redraw(CTX_wm_region(C));
488         return OPERATOR_FINISHED;
489 }
490
491 void PAINT_OT_vert_select_inverse(wmOperatorType *ot)
492 {
493         ot->name = "Vertex Select Invert";
494         ot->description = "Invert selection of vertices";
495         ot->idname = "PAINT_OT_vert_select_inverse";
496
497         ot->exec = vert_select_inverse_exec;
498         ot->poll = vert_paint_poll;
499
500         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
501 }
502 static int face_select_inverse_exec(bContext *C, wmOperator *UNUSED(op))
503 {
504         Object *ob = CTX_data_active_object(C);
505         paintface_deselect_all_visible(ob, SEL_INVERT, TRUE);
506         ED_region_tag_redraw(CTX_wm_region(C));
507         return OPERATOR_FINISHED;
508 }
509
510
511 void PAINT_OT_face_select_inverse(wmOperatorType *ot)
512 {
513         ot->name = "Face Select Invert";
514         ot->description = "Invert selection of faces";
515         ot->idname = "PAINT_OT_face_select_inverse";
516
517         ot->exec = face_select_inverse_exec;
518         ot->poll = facemask_paint_poll;
519
520         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
521 }
522
523 static int face_select_hide_exec(bContext *C, wmOperator *op)
524 {
525         const int unselected = RNA_boolean_get(op->ptr, "unselected");
526         Object *ob = CTX_data_active_object(C);
527         paintface_hide(ob, unselected);
528         ED_region_tag_redraw(CTX_wm_region(C));
529         return OPERATOR_FINISHED;
530 }
531
532 void PAINT_OT_face_select_hide(wmOperatorType *ot)
533 {
534         ot->name = "Face Select Hide";
535         ot->description = "Hide selected faces";
536         ot->idname = "PAINT_OT_face_select_hide";
537
538         ot->exec = face_select_hide_exec;
539         ot->poll = facemask_paint_poll;
540
541         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
542
543         RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects");
544 }
545
546 static int face_select_reveal_exec(bContext *C, wmOperator *UNUSED(op))
547 {
548         Object *ob = CTX_data_active_object(C);
549         paintface_reveal(ob);
550         ED_region_tag_redraw(CTX_wm_region(C));
551         return OPERATOR_FINISHED;
552 }
553
554 void PAINT_OT_face_select_reveal(wmOperatorType *ot)
555 {
556         ot->name = "Face Select Reveal";
557         ot->description = "Reveal hidden faces";
558         ot->idname = "PAINT_OT_face_select_reveal";
559
560         ot->exec = face_select_reveal_exec;
561         ot->poll = facemask_paint_poll;
562
563         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
564
565         RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects");
566 }