style cleanup: spaces aroudn operators for operator definitions.
[blender.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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, 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
45 #include "BKE_brush.h"
46 #include "BKE_context.h"
47 #include "BKE_DerivedMesh.h"
48 #include "BKE_paint.h"
49
50 #include "RNA_access.h"
51 #include "RNA_define.h"
52
53 #include "BIF_gl.h"
54 /* TODO: remove once projectf goes away */
55 #include "BIF_glutil.h"
56
57 #include "RE_shader_ext.h"
58
59 #include "ED_view3d.h"
60 #include "ED_screen.h"
61
62 #include "BLO_sys_types.h"
63 #include "ED_mesh.h" /* for face mask functions */
64
65 #include "WM_api.h"
66 #include "WM_types.h"
67
68 #include "paint_intern.h"
69
70 /* Convert the object-space axis-aligned bounding box (expressed as
71  * its minimum and maximum corners) into a screen-space rectangle,
72  * returns zero if the result is empty */
73 int paint_convert_bb_to_rect(rcti *rect,
74                                                          const float bb_min[3],
75                                                          const float bb_max[3],
76                                                          const ARegion *ar,
77                                                          RegionView3D *rv3d,
78                                                          Object *ob)
79 {
80         float projection_mat[4][4];
81         int i, j, k;
82
83         rect->xmin = rect->ymin = INT_MAX;
84         rect->xmax = rect->ymax = INT_MIN;
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                                 vec[0] = i ? bb_min[0] : bb_max[0];
97                                 vec[1] = j ? bb_min[1] : bb_max[1];
98                                 vec[2] = k ? bb_min[2] : bb_max[2];
99                                 /* convert corner to screen space */
100                                 ED_view3d_project_float_v2(ar, vec, proj, projection_mat);
101                                 /* expand 2D rectangle */
102                                 rect->xmin = MIN2(rect->xmin, proj[0]);
103                                 rect->xmax = MAX2(rect->xmax, proj[0]);
104                                 rect->ymin = MIN2(rect->ymin, proj[1]);
105                                 rect->ymax = MAX2(rect->ymax, proj[1]);
106                         }
107                 }
108         }
109
110         /* return false if the rectangle has non-positive area */
111         return rect->xmin < rect->xmax && rect->ymin < rect->ymax;
112 }
113
114 /* Get four planes in object-space that describe the projection of
115  * screen_rect from screen into object-space (essentially converting a
116  * 2D screens-space bounding box into four 3D planes) */
117 void paint_calc_redraw_planes(float planes[4][4],
118                                                           const ARegion *ar,
119                                                           RegionView3D *rv3d,
120                                                           Object *ob,
121                                                           const rcti *screen_rect)
122 {
123         BoundBox bb;
124         bglMats mats;
125         rcti rect;
126
127         memset(&bb, 0, sizeof(BoundBox));
128         view3d_get_transformation(ar, rv3d, ob, &mats);
129
130         /* use some extra space just in case */
131         rect = *screen_rect;
132         rect.xmin -= 2;
133         rect.xmax += 2;
134         rect.ymin -= 2;
135         rect.ymax += 2;
136
137         ED_view3d_calc_clipping(&bb, planes, &mats, &rect);
138         mul_m4_fl(planes, -1.0f);
139 }
140
141 /* convert a point in model coordinates to 2D screen coordinates */
142 /* TODO: can be deleted once all calls are replaced with
143  * view3d_project_float() */
144 void projectf(bglMats *mats, const float v[3], float p[2])
145 {
146         double ux, uy, uz;
147
148         gluProject(v[0],v[1],v[2], mats->modelview, mats->projection,
149                    (GLint *)mats->viewport, &ux, &uy, &uz);
150         p[0]= ux;
151         p[1]= uy;
152 }
153
154 float paint_calc_object_space_radius(ViewContext *vc, const float center[3],
155                                      float pixel_radius)
156 {
157         Object *ob = vc->obact;
158         float delta[3], scale, loc[3];
159         float mval_f[2];
160
161         mul_v3_m4v3(loc, ob->obmat, center);
162
163         initgrabz(vc->rv3d, loc[0], loc[1], loc[2]);
164
165         mval_f[0]= pixel_radius;
166         mval_f[1]= 0.0f;
167         ED_view3d_win_to_delta(vc->ar, mval_f, delta);
168
169         scale= fabsf(mat4_to_scale(ob->obmat));
170         scale= (scale == 0.0f)? 1.0f: scale;
171
172         return len_v3(delta)/scale;
173 }
174
175 float paint_get_tex_pixel(Brush* br, float u, float v)
176 {
177         TexResult texres;
178         float co[3];
179         int hasrgb;
180
181         co[0] = u;
182         co[1] = v;
183         co[2] = 0;
184
185         memset(&texres, 0, sizeof(TexResult));
186         hasrgb = multitex_ext(br->mtex.tex, co, NULL, NULL, 0, &texres);
187
188         if (hasrgb & TEX_RGB)
189                 texres.tin = (0.35f*texres.tr + 0.45f*texres.tg + 0.2f*texres.tb)*texres.ta;
190
191         return texres.tin;
192 }
193
194 /* 3D Paint */
195
196 static void imapaint_project(Object *ob, float model[][4], float proj[][4], const float co[3], float pco[4])
197 {
198         copy_v3_v3(pco, co);
199         pco[3]= 1.0f;
200
201         mul_m4_v3(ob->obmat, pco);
202         mul_m4_v3(model, pco);
203         mul_m4_v4(proj, pco);
204 }
205
206 static void imapaint_tri_weights(Object *ob,
207                                  const float v1[3], const float v2[3], const float v3[3],
208                                  const float co[3], float w[3])
209 {
210         float pv1[4], pv2[4], pv3[4], h[3], divw;
211         float model[4][4], proj[4][4], wmat[3][3], invwmat[3][3];
212         GLint view[4];
213
214         /* compute barycentric coordinates */
215
216         /* get the needed opengl matrices */
217         glGetIntegerv(GL_VIEWPORT, view);
218         glGetFloatv(GL_MODELVIEW_MATRIX,  (float *)model);
219         glGetFloatv(GL_PROJECTION_MATRIX, (float *)proj);
220         view[0] = view[1] = 0;
221
222         /* project the verts */
223         imapaint_project(ob, model, proj, v1, pv1);
224         imapaint_project(ob, model, proj, v2, pv2);
225         imapaint_project(ob, model, proj, v3, pv3);
226
227         /* do inverse view mapping, see gluProject man page */
228         h[0]= (co[0] - view[0])*2.0f/view[2] - 1;
229         h[1]= (co[1] - view[1])*2.0f/view[3] - 1;
230         h[2]= 1.0f;
231
232         /* solve for(w1,w2,w3)/perspdiv in:
233          * h * perspdiv = Project * Model * (w1 * v1 + w2 * v2 + w3 * v3) */
234
235         wmat[0][0]= pv1[0];  wmat[1][0]= pv2[0];  wmat[2][0]= pv3[0];
236         wmat[0][1]= pv1[1];  wmat[1][1]= pv2[1];  wmat[2][1]= pv3[1];
237         wmat[0][2]= pv1[3];  wmat[1][2]= pv2[3];  wmat[2][2]= pv3[3];
238
239         invert_m3_m3(invwmat, wmat);
240         mul_m3_v3(invwmat, h);
241
242         copy_v3_v3(w, h);
243
244         /* w is still divided by perspdiv, make it sum to one */
245         divw= w[0] + w[1] + w[2];
246         if(divw != 0.0f) {
247                 mul_v3_fl(w, 1.0f/divw);
248         }
249 }
250
251 /* compute uv coordinates of mouse in face */
252 void imapaint_pick_uv(Scene *scene, Object *ob, unsigned int faceindex, const int xy[2], float uv[2])
253 {
254         DerivedMesh *dm = mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH);
255         const int *index = dm->getTessFaceDataArray(dm, CD_ORIGINDEX);
256         MTFace *tface = dm->getTessFaceDataArray(dm, CD_MTFACE), *tf;
257         int numfaces = dm->getNumTessFaces(dm), a, findex;
258         float p[2], w[3], absw, minabsw;
259         MFace mf;
260         MVert mv[4];
261
262         minabsw = 1e10;
263         uv[0] = uv[1] = 0.0;
264
265         /* test all faces in the derivedmesh with the original index of the picked face */
266         for(a = 0; a < numfaces; a++) {
267                 findex= index ? index[a]: a;
268
269                 if(findex == faceindex) {
270                         dm->getTessFace(dm, a, &mf);
271
272                         dm->getVert(dm, mf.v1, &mv[0]);
273                         dm->getVert(dm, mf.v2, &mv[1]);
274                         dm->getVert(dm, mf.v3, &mv[2]);
275                         if(mf.v4)
276                                 dm->getVert(dm, mf.v4, &mv[3]);
277
278                         tf= &tface[a];
279
280                         p[0]= xy[0];
281                         p[1]= xy[1];
282
283                         if(mf.v4) {
284                                 /* the triangle with the largest absolute values is the one
285                                  * with the most negative weights */
286                                 imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[3].co, p, w);
287                                 absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
288                                 if(absw < minabsw) {
289                                         uv[0]= tf->uv[0][0]*w[0] + tf->uv[1][0]*w[1] + tf->uv[3][0]*w[2];
290                                         uv[1]= tf->uv[0][1]*w[0] + tf->uv[1][1]*w[1] + tf->uv[3][1]*w[2];
291                                         minabsw = absw;
292                                 }
293
294                                 imapaint_tri_weights(ob, mv[1].co, mv[2].co, mv[3].co, p, w);
295                                 absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
296                                 if(absw < minabsw) {
297                                         uv[0]= tf->uv[1][0]*w[0] + tf->uv[2][0]*w[1] + tf->uv[3][0]*w[2];
298                                         uv[1]= tf->uv[1][1]*w[0] + tf->uv[2][1]*w[1] + tf->uv[3][1]*w[2];
299                                         minabsw = absw;
300                                 }
301                         }
302                         else {
303                                 imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[2].co, p, w);
304                                 absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
305                                 if(absw < minabsw) {
306                                         uv[0]= tf->uv[0][0]*w[0] + tf->uv[1][0]*w[1] + tf->uv[2][0]*w[2];
307                                         uv[1]= tf->uv[0][1]*w[0] + tf->uv[1][1]*w[1] + tf->uv[2][1]*w[2];
308                                         minabsw = absw;
309                                 }
310                         }
311                 }
312         }
313
314         dm->release(dm);
315 }
316
317 ///* returns 0 if not found, otherwise 1 */
318 int imapaint_pick_face(ViewContext *vc, Mesh *me, const int mval[2], unsigned int *index)
319 {
320         if(!me || me->totface==0)
321                 return 0;
322
323         /* sample only on the exact position */
324         *index = view3d_sample_backbuf(vc, mval[0], mval[1]);
325
326         if((*index)<=0 || (*index)>(unsigned int)me->totface)
327                 return 0;
328
329         (*index)--;
330         
331         return 1;
332 }
333
334 /* used for both 3d view and image window */
335 void paint_sample_color(Scene *scene, ARegion *ar, int x, int y)        /* frontbuf */
336 {
337         Brush *br = paint_brush(paint_get_active(scene));
338         unsigned int col;
339         char *cp;
340
341         CLAMP(x, 0, ar->winx);
342         CLAMP(y, 0, ar->winy);
343         
344         glReadBuffer(GL_FRONT);
345         glReadPixels(x+ar->winrct.xmin, y+ar->winrct.ymin, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &col);
346         glReadBuffer(GL_BACK);
347
348         cp = (char *)&col;
349         
350         if(br) {
351                 br->rgb[0]= cp[0]/255.0f;
352                 br->rgb[1]= cp[1]/255.0f;
353                 br->rgb[2]= cp[2]/255.0f;
354         }
355 }
356
357 static int brush_curve_preset_exec(bContext *C, wmOperator *op)
358 {
359         Brush *br = paint_brush(paint_get_active(CTX_data_scene(C)));
360         brush_curve_preset(br, RNA_enum_get(op->ptr, "shape"));
361
362         return OPERATOR_FINISHED;
363 }
364
365 static int brush_curve_preset_poll(bContext *C)
366 {
367         Brush *br = paint_brush(paint_get_active(CTX_data_scene(C)));
368
369         return br && br->curve;
370 }
371
372 void BRUSH_OT_curve_preset(wmOperatorType *ot)
373 {
374         static EnumPropertyItem prop_shape_items[] = {
375                 {CURVE_PRESET_SHARP, "SHARP", 0, "Sharp", ""},
376                 {CURVE_PRESET_SMOOTH, "SMOOTH", 0, "Smooth", ""},
377                 {CURVE_PRESET_MAX, "MAX", 0, "Max", ""},
378                 {CURVE_PRESET_LINE, "LINE", 0, "Line", ""},
379                 {CURVE_PRESET_ROUND, "ROUND", 0, "Round", ""},
380                 {CURVE_PRESET_ROOT, "ROOT", 0, "Root", ""},
381                 {0, NULL, 0, NULL, NULL}};
382
383         ot->name = "Preset";
384         ot->description = "Set brush shape";
385         ot->idname = "BRUSH_OT_curve_preset";
386
387         ot->exec = brush_curve_preset_exec;
388         ot->poll = brush_curve_preset_poll;
389
390         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
391
392         RNA_def_enum(ot->srna, "shape", prop_shape_items, CURVE_PRESET_SMOOTH, "Mode", "");
393 }
394
395
396 /* face-select ops */
397 static int paint_select_linked_exec(bContext *C, wmOperator *UNUSED(op))
398 {
399         paintface_select_linked(C, CTX_data_active_object(C), NULL, 2);
400         ED_region_tag_redraw(CTX_wm_region(C));
401         return OPERATOR_FINISHED;
402 }
403
404 void PAINT_OT_face_select_linked(wmOperatorType *ot)
405 {
406         ot->name = "Select Linked";
407         ot->description = "Select linked faces";
408         ot->idname = "PAINT_OT_face_select_linked";
409
410         ot->exec = paint_select_linked_exec;
411         ot->poll = facemask_paint_poll;
412
413         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
414 }
415
416 static int paint_select_linked_pick_invoke(bContext *C, wmOperator *op, wmEvent *event)
417 {
418         int mode= RNA_boolean_get(op->ptr, "extend") ? 1:0;
419         paintface_select_linked(C, CTX_data_active_object(C), event->mval, mode);
420         ED_region_tag_redraw(CTX_wm_region(C));
421         return OPERATOR_FINISHED;
422 }
423
424 void PAINT_OT_face_select_linked_pick(wmOperatorType *ot)
425 {
426         ot->name = "Select Linked Pick";
427         ot->description = "Select linked faces";
428         ot->idname = "PAINT_OT_face_select_linked_pick";
429
430         ot->invoke = paint_select_linked_pick_invoke;
431         ot->poll = facemask_paint_poll;
432
433         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
434
435         RNA_def_boolean(ot->srna, "extend", 0, "Extend", "Extend the existing selection");
436 }
437
438
439 static int face_select_all_exec(bContext *C, wmOperator *op)
440 {
441         Object *ob= CTX_data_active_object(C);
442         paintface_deselect_all_visible(ob, RNA_enum_get(op->ptr, "action"), TRUE);
443         ED_region_tag_redraw(CTX_wm_region(C));
444         return OPERATOR_FINISHED;
445 }
446
447
448 void PAINT_OT_face_select_all(wmOperatorType *ot)
449 {
450         ot->name = "Face Selection";
451         ot->description = "Change selection for all faces";
452         ot->idname = "PAINT_OT_face_select_all";
453
454         ot->exec = face_select_all_exec;
455         ot->poll = facemask_paint_poll;
456
457         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
458
459         WM_operator_properties_select_all(ot);
460 }
461
462
463 static int vert_select_all_exec(bContext *C, wmOperator *op)
464 {
465         Object *ob= CTX_data_active_object(C);
466         paintvert_deselect_all_visible(ob, RNA_enum_get(op->ptr, "action"), TRUE);
467         ED_region_tag_redraw(CTX_wm_region(C));
468         return OPERATOR_FINISHED;
469 }
470
471
472 void PAINT_OT_vert_select_all(wmOperatorType *ot)
473 {
474         ot->name = "Vertex Selection";
475         ot->description = "Change selection for all vertices";
476         ot->idname = "PAINT_OT_vert_select_all";
477
478         ot->exec = vert_select_all_exec;
479         ot->poll = vert_paint_poll;
480
481         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
482
483         WM_operator_properties_select_all(ot);
484 }
485
486 static int vert_select_inverse_exec(bContext *C, wmOperator *UNUSED(op))
487 {
488         Object *ob= CTX_data_active_object(C);
489         paintvert_deselect_all_visible(ob, SEL_INVERT, TRUE);
490         ED_region_tag_redraw(CTX_wm_region(C));
491         return OPERATOR_FINISHED;
492 }
493
494 void PAINT_OT_vert_select_inverse(wmOperatorType *ot)
495 {
496         ot->name = "Vertex Select Invert";
497         ot->description = "Invert selection of vertices";
498         ot->idname = "PAINT_OT_vert_select_inverse";
499
500         ot->exec = vert_select_inverse_exec;
501         ot->poll = vert_paint_poll;
502
503         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
504 }
505 static int face_select_inverse_exec(bContext *C, wmOperator *UNUSED(op))
506 {
507         Object *ob= CTX_data_active_object(C);
508         paintface_deselect_all_visible(ob, SEL_INVERT, TRUE);
509         ED_region_tag_redraw(CTX_wm_region(C));
510         return OPERATOR_FINISHED;
511 }
512
513
514 void PAINT_OT_face_select_inverse(wmOperatorType *ot)
515 {
516         ot->name = "Face Select Invert";
517         ot->description = "Invert selection of faces";
518         ot->idname = "PAINT_OT_face_select_inverse";
519
520         ot->exec = face_select_inverse_exec;
521         ot->poll = facemask_paint_poll;
522
523         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
524 }
525
526 static int face_select_hide_exec(bContext *C, wmOperator *op)
527 {
528         const int unselected= RNA_boolean_get(op->ptr, "unselected");
529         Object *ob= CTX_data_active_object(C);
530         paintface_hide(ob, unselected);
531         ED_region_tag_redraw(CTX_wm_region(C));
532         return OPERATOR_FINISHED;
533 }
534
535 void PAINT_OT_face_select_hide(wmOperatorType *ot)
536 {
537         ot->name = "Face Select Hide";
538         ot->description = "Hide selected faces";
539         ot->idname = "PAINT_OT_face_select_hide";
540
541         ot->exec = face_select_hide_exec;
542         ot->poll = facemask_paint_poll;
543
544         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
545
546         RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects");
547 }
548
549 static int face_select_reveal_exec(bContext *C, wmOperator *UNUSED(op))
550 {
551         Object *ob= CTX_data_active_object(C);
552         paintface_reveal(ob);
553         ED_region_tag_redraw(CTX_wm_region(C));
554         return OPERATOR_FINISHED;
555 }
556
557 void PAINT_OT_face_select_reveal(wmOperatorType *ot)
558 {
559         ot->name = "Face Select Reveal";
560         ot->description = "Reveal hidden faces";
561         ot->idname = "PAINT_OT_face_select_reveal";
562
563         ot->exec = face_select_reveal_exec;
564         ot->poll = facemask_paint_poll;
565
566         ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
567
568         RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects");
569 }