code cleanup: remove redundant calls to CTX_data_main()
[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 #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;
181         float co[3];
182         int hasrgb;
183
184         co[0] = u;
185         co[1] = v;
186         co[2] = 0;
187
188         memset(&texres, 0, sizeof(TexResult));
189         hasrgb = multitex_ext(br->mtex.tex, co, NULL, NULL, 0, &texres);
190
191         if (hasrgb & TEX_RGB)
192                 texres.tin = rgb_to_grayscale(&texres.tr) * texres.ta;
193
194         return texres.tin;
195 }
196
197 /* 3D Paint */
198
199 static void imapaint_project(Object *ob, float model[][4], float proj[][4], const float co[3], float pco[4])
200 {
201         copy_v3_v3(pco, co);
202         pco[3] = 1.0f;
203
204         mul_m4_v3(ob->obmat, pco);
205         mul_m4_v3(model, pco);
206         mul_m4_v4(proj, pco);
207 }
208
209 static void imapaint_tri_weights(Object *ob,
210                                  const float v1[3], const float v2[3], const float v3[3],
211                                  const float co[3], float w[3])
212 {
213         float pv1[4], pv2[4], pv3[4], h[3], divw;
214         float model[4][4], proj[4][4], wmat[3][3], invwmat[3][3];
215         GLint view[4];
216
217         /* compute barycentric coordinates */
218
219         /* get the needed opengl matrices */
220         glGetIntegerv(GL_VIEWPORT, view);
221         glGetFloatv(GL_MODELVIEW_MATRIX,  (float *)model);
222         glGetFloatv(GL_PROJECTION_MATRIX, (float *)proj);
223         view[0] = view[1] = 0;
224
225         /* project the verts */
226         imapaint_project(ob, model, proj, v1, pv1);
227         imapaint_project(ob, model, proj, v2, pv2);
228         imapaint_project(ob, model, proj, v3, pv3);
229
230         /* do inverse view mapping, see gluProject man page */
231         h[0] = (co[0] - view[0]) * 2.0f / view[2] - 1;
232         h[1] = (co[1] - view[1]) * 2.0f / view[3] - 1;
233         h[2] = 1.0f;
234
235         /* solve for (w1,w2,w3)/perspdiv in:
236          * h * perspdiv = Project * Model * (w1 * v1 + w2 * v2 + w3 * v3) */
237
238         wmat[0][0] = pv1[0];  wmat[1][0] = pv2[0];  wmat[2][0] = pv3[0];
239         wmat[0][1] = pv1[1];  wmat[1][1] = pv2[1];  wmat[2][1] = pv3[1];
240         wmat[0][2] = pv1[3];  wmat[1][2] = pv2[3];  wmat[2][2] = pv3[3];
241
242         invert_m3_m3(invwmat, wmat);
243         mul_m3_v3(invwmat, h);
244
245         copy_v3_v3(w, h);
246
247         /* w is still divided by perspdiv, make it sum to one */
248         divw = w[0] + w[1] + w[2];
249         if (divw != 0.0f) {
250                 mul_v3_fl(w, 1.0f / divw);
251         }
252 }
253
254 /* compute uv coordinates of mouse in face */
255 void imapaint_pick_uv(Scene *scene, Object *ob, unsigned int faceindex, const int xy[2], float uv[2])
256 {
257         DerivedMesh *dm = mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH);
258         const int *index = dm->getTessFaceDataArray(dm, CD_ORIGINDEX);
259         MTFace *tface = dm->getTessFaceDataArray(dm, CD_MTFACE), *tf;
260         int numfaces = dm->getNumTessFaces(dm), a, findex;
261         float p[2], w[3], absw, minabsw;
262         MFace mf;
263         MVert mv[4];
264
265         minabsw = 1e10;
266         uv[0] = uv[1] = 0.0;
267
268         /* test all faces in the derivedmesh with the original index of the picked face */
269         for (a = 0; a < numfaces; a++) {
270                 findex = index ? index[a] : a;
271
272                 if (findex == faceindex) {
273                         dm->getTessFace(dm, a, &mf);
274
275                         dm->getVert(dm, mf.v1, &mv[0]);
276                         dm->getVert(dm, mf.v2, &mv[1]);
277                         dm->getVert(dm, mf.v3, &mv[2]);
278                         if (mf.v4)
279                                 dm->getVert(dm, mf.v4, &mv[3]);
280
281                         tf = &tface[a];
282
283                         p[0] = xy[0];
284                         p[1] = xy[1];
285
286                         if (mf.v4) {
287                                 /* the triangle with the largest absolute values is the one
288                                  * with the most negative weights */
289                                 imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[3].co, p, w);
290                                 absw = fabsf(w[0]) + fabsf(w[1]) + fabsf(w[2]);
291                                 if (absw < minabsw) {
292                                         uv[0] = tf->uv[0][0] * w[0] + tf->uv[1][0] * w[1] + tf->uv[3][0] * w[2];
293                                         uv[1] = tf->uv[0][1] * w[0] + tf->uv[1][1] * w[1] + tf->uv[3][1] * w[2];
294                                         minabsw = absw;
295                                 }
296
297                                 imapaint_tri_weights(ob, mv[1].co, mv[2].co, mv[3].co, p, w);
298                                 absw = fabsf(w[0]) + fabsf(w[1]) + fabsf(w[2]);
299                                 if (absw < minabsw) {
300                                         uv[0] = tf->uv[1][0] * w[0] + tf->uv[2][0] * w[1] + tf->uv[3][0] * w[2];
301                                         uv[1] = tf->uv[1][1] * w[0] + tf->uv[2][1] * w[1] + tf->uv[3][1] * w[2];
302                                         minabsw = absw;
303                                 }
304                         }
305                         else {
306                                 imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[2].co, p, w);
307                                 absw = fabsf(w[0]) + fabsf(w[1]) + fabsf(w[2]);
308                                 if (absw < minabsw) {
309                                         uv[0] = tf->uv[0][0] * w[0] + tf->uv[1][0] * w[1] + tf->uv[2][0] * w[2];
310                                         uv[1] = tf->uv[0][1] * w[0] + tf->uv[1][1] * w[1] + tf->uv[2][1] * w[2];
311                                         minabsw = absw;
312                                 }
313                         }
314                 }
315         }
316
317         dm->release(dm);
318 }
319
320 /* returns 0 if not found, otherwise 1 */
321 int imapaint_pick_face(ViewContext *vc, const int mval[2], unsigned int *index, unsigned int totface)
322 {
323         if (totface == 0)
324                 return 0;
325
326         /* sample only on the exact position */
327         *index = view3d_sample_backbuf(vc, mval[0], mval[1]);
328
329         if ((*index) <= 0 || (*index) > (unsigned int)totface) {
330                 return 0;
331         }
332
333         (*index)--;
334         
335         return 1;
336 }
337
338 /* used for both 3d view and image window */
339 void paint_sample_color(const bContext *C, ARegion *ar, int x, int y)    /* frontbuf */
340 {
341         Brush *br = paint_brush(paint_get_active_from_context(C));
342         unsigned int col;
343         char *cp;
344
345         CLAMP(x, 0, ar->winx);
346         CLAMP(y, 0, ar->winy);
347         
348         glReadBuffer(GL_FRONT);
349         glReadPixels(x + ar->winrct.xmin, y + ar->winrct.ymin, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &col);
350         glReadBuffer(GL_BACK);
351
352         cp = (char *)&col;
353         
354         if (br) {
355                 br->rgb[0] = cp[0] / 255.0f;
356                 br->rgb[1] = cp[1] / 255.0f;
357                 br->rgb[2] = cp[2] / 255.0f;
358         }
359 }
360
361 static int brush_curve_preset_exec(bContext *C, wmOperator *op)
362 {
363         Brush *br = paint_brush(paint_get_active_from_context(C));
364         BKE_brush_curve_preset(br, RNA_enum_get(op->ptr, "shape"));
365
366         return OPERATOR_FINISHED;
367 }
368
369 static int brush_curve_preset_poll(bContext *C)
370 {
371         Brush *br = paint_brush(paint_get_active_from_context(C));
372
373         return br && br->curve;
374 }
375
376 void BRUSH_OT_curve_preset(wmOperatorType *ot)
377 {
378         static EnumPropertyItem prop_shape_items[] = {
379                 {CURVE_PRESET_SHARP, "SHARP", 0, "Sharp", ""},
380                 {CURVE_PRESET_SMOOTH, "SMOOTH", 0, "Smooth", ""},
381                 {CURVE_PRESET_MAX, "MAX", 0, "Max", ""},
382                 {CURVE_PRESET_LINE, "LINE", 0, "Line", ""},
383                 {CURVE_PRESET_ROUND, "ROUND", 0, "Round", ""},
384                 {CURVE_PRESET_ROOT, "ROOT", 0, "Root", ""},
385                 {0, NULL, 0, NULL, NULL}};
386
387         ot->name = "Preset";
388         ot->description = "Set brush shape";
389         ot->idname = "BRUSH_OT_curve_preset";
390
391         ot->exec = brush_curve_preset_exec;
392         ot->poll = brush_curve_preset_poll;
393
394         RNA_def_enum(ot->srna, "shape", prop_shape_items, CURVE_PRESET_SMOOTH, "Mode", "");
395 }
396
397
398 /* face-select ops */
399 static int paint_select_linked_exec(bContext *C, wmOperator *UNUSED(op))
400 {
401         paintface_select_linked(C, CTX_data_active_object(C), NULL, 2);
402         ED_region_tag_redraw(CTX_wm_region(C));
403         return OPERATOR_FINISHED;
404 }
405
406 void PAINT_OT_face_select_linked(wmOperatorType *ot)
407 {
408         ot->name = "Select Linked";
409         ot->description = "Select linked faces";
410         ot->idname = "PAINT_OT_face_select_linked";
411
412         ot->exec = paint_select_linked_exec;
413         ot->poll = facemask_paint_poll;
414
415         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
416 }
417
418 static int paint_select_linked_pick_invoke(bContext *C, wmOperator *op, wmEvent *event)
419 {
420         int mode = RNA_boolean_get(op->ptr, "extend") ? 1 : 0;
421         paintface_select_linked(C, CTX_data_active_object(C), event->mval, mode);
422         ED_region_tag_redraw(CTX_wm_region(C));
423         return OPERATOR_FINISHED;
424 }
425
426 void PAINT_OT_face_select_linked_pick(wmOperatorType *ot)
427 {
428         ot->name = "Select Linked Pick";
429         ot->description = "Select linked faces";
430         ot->idname = "PAINT_OT_face_select_linked_pick";
431
432         ot->invoke = paint_select_linked_pick_invoke;
433         ot->poll = facemask_paint_poll;
434
435         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
436
437         RNA_def_boolean(ot->srna, "extend", 0, "Extend", "Extend the existing selection");
438 }
439
440
441 static int face_select_all_exec(bContext *C, wmOperator *op)
442 {
443         Object *ob = CTX_data_active_object(C);
444         paintface_deselect_all_visible(ob, RNA_enum_get(op->ptr, "action"), TRUE);
445         ED_region_tag_redraw(CTX_wm_region(C));
446         return OPERATOR_FINISHED;
447 }
448
449
450 void PAINT_OT_face_select_all(wmOperatorType *ot)
451 {
452         ot->name = "Face Selection";
453         ot->description = "Change selection for all faces";
454         ot->idname = "PAINT_OT_face_select_all";
455
456         ot->exec = face_select_all_exec;
457         ot->poll = facemask_paint_poll;
458
459         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
460
461         WM_operator_properties_select_all(ot);
462 }
463
464
465 static int vert_select_all_exec(bContext *C, wmOperator *op)
466 {
467         Object *ob = CTX_data_active_object(C);
468         paintvert_deselect_all_visible(ob, RNA_enum_get(op->ptr, "action"), TRUE);
469         ED_region_tag_redraw(CTX_wm_region(C));
470         return OPERATOR_FINISHED;
471 }
472
473
474 void PAINT_OT_vert_select_all(wmOperatorType *ot)
475 {
476         ot->name = "Vertex Selection";
477         ot->description = "Change selection for all vertices";
478         ot->idname = "PAINT_OT_vert_select_all";
479
480         ot->exec = vert_select_all_exec;
481         ot->poll = vert_paint_poll;
482
483         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
484
485         WM_operator_properties_select_all(ot);
486 }
487
488 static int vert_select_inverse_exec(bContext *C, wmOperator *UNUSED(op))
489 {
490         Object *ob = CTX_data_active_object(C);
491         paintvert_deselect_all_visible(ob, SEL_INVERT, TRUE);
492         ED_region_tag_redraw(CTX_wm_region(C));
493         return OPERATOR_FINISHED;
494 }
495
496 void PAINT_OT_vert_select_inverse(wmOperatorType *ot)
497 {
498         ot->name = "Vertex Select Invert";
499         ot->description = "Invert selection of vertices";
500         ot->idname = "PAINT_OT_vert_select_inverse";
501
502         ot->exec = vert_select_inverse_exec;
503         ot->poll = vert_paint_poll;
504
505         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
506 }
507 static int face_select_inverse_exec(bContext *C, wmOperator *UNUSED(op))
508 {
509         Object *ob = CTX_data_active_object(C);
510         paintface_deselect_all_visible(ob, SEL_INVERT, TRUE);
511         ED_region_tag_redraw(CTX_wm_region(C));
512         return OPERATOR_FINISHED;
513 }
514
515
516 void PAINT_OT_face_select_inverse(wmOperatorType *ot)
517 {
518         ot->name = "Face Select Invert";
519         ot->description = "Invert selection of faces";
520         ot->idname = "PAINT_OT_face_select_inverse";
521
522         ot->exec = face_select_inverse_exec;
523         ot->poll = facemask_paint_poll;
524
525         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
526 }
527
528 static int face_select_hide_exec(bContext *C, wmOperator *op)
529 {
530         const int unselected = RNA_boolean_get(op->ptr, "unselected");
531         Object *ob = CTX_data_active_object(C);
532         paintface_hide(ob, unselected);
533         ED_region_tag_redraw(CTX_wm_region(C));
534         return OPERATOR_FINISHED;
535 }
536
537 void PAINT_OT_face_select_hide(wmOperatorType *ot)
538 {
539         ot->name = "Face Select Hide";
540         ot->description = "Hide selected faces";
541         ot->idname = "PAINT_OT_face_select_hide";
542
543         ot->exec = face_select_hide_exec;
544         ot->poll = facemask_paint_poll;
545
546         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
547
548         RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects");
549 }
550
551 static int face_select_reveal_exec(bContext *C, wmOperator *UNUSED(op))
552 {
553         Object *ob = CTX_data_active_object(C);
554         paintface_reveal(ob);
555         ED_region_tag_redraw(CTX_wm_region(C));
556         return OPERATOR_FINISHED;
557 }
558
559 void PAINT_OT_face_select_reveal(wmOperatorType *ot)
560 {
561         ot->name = "Face Select Reveal";
562         ot->description = "Reveal hidden faces";
563         ot->idname = "PAINT_OT_face_select_reveal";
564
565         ot->exec = face_select_reveal_exec;
566         ot->poll = facemask_paint_poll;
567
568         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
569
570         RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects");
571 }