source/blender/editors/sculpt_paint/paint_utils.c

   1 /** \file blender/editors/sculpt_paint/paint_utils.c
   2  *  \ingroup edsculpt
   3  */
   4
   5 #include <math.h>
   6 #include <stdlib.h>
   7
   8 #include "DNA_mesh_types.h"
   9 #include "DNA_meshdata_types.h"
  10 #include "DNA_object_types.h"
  11
  12 #include "DNA_scene_types.h"
  13 #include "DNA_brush_types.h"
  14
  15 #include "BLI_math.h"
  16 #include "BLI_utildefines.h"
  17
  18 #include "BKE_brush.h"
  19 #include "BKE_context.h"
  20 #include "BKE_DerivedMesh.h"
  21 #include "BKE_paint.h"
  22
  23 #include "RNA_access.h"
  24 #include "RNA_define.h"
  25
  26 #include "BIF_gl.h"
  27 /* TODO: remove once projectf goes away */
  28 #include "BIF_glutil.h"
  29
  30 #include "RE_shader_ext.h"
  31
  32 #include "ED_view3d.h"
  33 #include "ED_screen.h"
  34
  35 #include "BLO_sys_types.h"
  36 #include "ED_mesh.h" /* for face mask functions */
  37
  38 #include "WM_api.h"
  39 #include "WM_types.h"
  40
  41 #include "paint_intern.h"
  42
  43 /* convert a point in model coordinates to 2D screen coordinates */
  44 /* TODO: can be deleted once all calls are replaced with
  45    view3d_project_float() */
  46 void projectf(bglMats *mats, const float v[3], float p[2])
  47 {
  48         double ux, uy, uz;
  49
  50         gluProject(v[0],v[1],v[2], mats->modelview, mats->projection,
  51                    (GLint *)mats->viewport, &ux, &uy, &uz);
  52         p[0]= ux;
  53         p[1]= uy;
  54 }
  55
  56 float paint_calc_object_space_radius(ViewContext *vc, float center[3],
  57                                      float pixel_radius)
  58 {
  59         Object *ob = vc->obact;
  60         float delta[3], scale, loc[3];
  61
  62         mul_v3_m4v3(loc, ob->obmat, center);
  63
  64         initgrabz(vc->rv3d, loc[0], loc[1], loc[2]);
  65         window_to_3d_delta(vc->ar, delta, pixel_radius, 0);
  66
  67         scale= fabsf(mat4_to_scale(ob->obmat));
  68         scale= (scale == 0.0f)? 1.0f: scale;
  69
  70         return len_v3(delta)/scale;
  71 }
  72
  73 float paint_get_tex_pixel(Brush* br, float u, float v)
  74 {
  75         TexResult texres;
  76         float co[3];
  77         int hasrgb;
  78
  79         co[0] = u;
  80         co[1] = v;
  81         co[2] = 0;
  82
  83         memset(&texres, 0, sizeof(TexResult));
  84         hasrgb = multitex_ext(br->mtex.tex, co, NULL, NULL, 0, &texres);
  85
  86         if (hasrgb & TEX_RGB)
  87                 texres.tin = (0.35f*texres.tr + 0.45f*texres.tg + 0.2f*texres.tb)*texres.ta;
  88
  89         return texres.tin;
  90 }
  91
  92 /* 3D Paint */
  93
  94 static void imapaint_project(Object *ob, float *model, float *proj, float *co, float *pco)
  95 {
  96         VECCOPY(pco, co);
  97         pco[3]= 1.0f;
  98
  99         mul_m4_v3(ob->obmat, pco);
 100         mul_m4_v3((float(*)[4])model, pco);
 101         mul_m4_v4((float(*)[4])proj, pco);
 102 }
 103
 104 static void imapaint_tri_weights(Object *ob, float *v1, float *v2, float *v3, float *co, float *w)
 105 {
 106         float pv1[4], pv2[4], pv3[4], h[3], divw;
 107         float model[16], proj[16], wmat[3][3], invwmat[3][3];
 108         GLint view[4];
 109
 110         /* compute barycentric coordinates */
 111
 112         /* get the needed opengl matrices */
 113         glGetIntegerv(GL_VIEWPORT, view);
 114         glGetFloatv(GL_MODELVIEW_MATRIX, model);
 115         glGetFloatv(GL_PROJECTION_MATRIX, proj);
 116         view[0] = view[1] = 0;
 117
 118         /* project the verts */
 119         imapaint_project(ob, model, proj, v1, pv1);
 120         imapaint_project(ob, model, proj, v2, pv2);
 121         imapaint_project(ob, model, proj, v3, pv3);
 122
 123         /* do inverse view mapping, see gluProject man page */
 124         h[0]= (co[0] - view[0])*2.0f/view[2] - 1;
 125         h[1]= (co[1] - view[1])*2.0f/view[3] - 1;
 126         h[2]= 1.0f;
 127
 128         /* solve for(w1,w2,w3)/perspdiv in:
 129            h*perspdiv = Project*Model*(w1*v1 + w2*v2 + w3*v3) */
 130
 131         wmat[0][0]= pv1[0];  wmat[1][0]= pv2[0];  wmat[2][0]= pv3[0];
 132         wmat[0][1]= pv1[1];  wmat[1][1]= pv2[1];  wmat[2][1]= pv3[1];
 133         wmat[0][2]= pv1[3];  wmat[1][2]= pv2[3];  wmat[2][2]= pv3[3];
 134
 135         invert_m3_m3(invwmat, wmat);
 136         mul_m3_v3(invwmat, h);
 137
 138         VECCOPY(w, h);
 139
 140         /* w is still divided by perspdiv, make it sum to one */
 141         divw= w[0] + w[1] + w[2];
 142         if(divw != 0.0f)
 143                 mul_v3_fl(w, 1.0f/divw);
 144 }
 145
 146 /* compute uv coordinates of mouse in face */
 147 void imapaint_pick_uv(Scene *scene, Object *ob, unsigned int faceindex, int *xy, float *uv)
 148 {
 149         DerivedMesh *dm = mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH);
 150         const int *index = dm->getTessFaceDataArray(dm, CD_ORIGINDEX);
 151         MTFace *tface = dm->getTessFaceDataArray(dm, CD_MTFACE), *tf;
 152         int numfaces = dm->getNumTessFaces(dm), a, findex;
 153         float p[2], w[3], absw, minabsw;
 154         MFace mf;
 155         MVert mv[4];
 156
 157         minabsw = 1e10;
 158         uv[0] = uv[1] = 0.0;
 159
 160         /* test all faces in the derivedmesh with the original index of the picked face */
 161         for(a = 0; a < numfaces; a++) {
 162                 findex= index ? index[a]: a;
 163
 164                 if(findex == faceindex) {
 165                         dm->getTessFace(dm, a, &mf);
 166
 167                         dm->getVert(dm, mf.v1, &mv[0]);
 168                         dm->getVert(dm, mf.v2, &mv[1]);
 169                         dm->getVert(dm, mf.v3, &mv[2]);
 170                         if(mf.v4)
 171                                 dm->getVert(dm, mf.v4, &mv[3]);
 172
 173                         tf= &tface[a];
 174
 175                         p[0]= xy[0];
 176                         p[1]= xy[1];
 177
 178                         if(mf.v4) {
 179                                 /* the triangle with the largest absolute values is the one
 180                                    with the most negative weights */
 181                                 imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[3].co, p, w);
 182                                 absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
 183                                 if(absw < minabsw) {
 184                                         uv[0]= tf->uv[0][0]*w[0] + tf->uv[1][0]*w[1] + tf->uv[3][0]*w[2];
 185                                         uv[1]= tf->uv[0][1]*w[0] + tf->uv[1][1]*w[1] + tf->uv[3][1]*w[2];
 186                                         minabsw = absw;
 187                                 }
 188
 189                                 imapaint_tri_weights(ob, mv[1].co, mv[2].co, mv[3].co, p, w);
 190                                 absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
 191                                 if(absw < minabsw) {
 192                                         uv[0]= tf->uv[1][0]*w[0] + tf->uv[2][0]*w[1] + tf->uv[3][0]*w[2];
 193                                         uv[1]= tf->uv[1][1]*w[0] + tf->uv[2][1]*w[1] + tf->uv[3][1]*w[2];
 194                                         minabsw = absw;
 195                                 }
 196                         }
 197                         else {
 198                                 imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[2].co, p, w);
 199                                 absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
 200                                 if(absw < minabsw) {
 201                                         uv[0]= tf->uv[0][0]*w[0] + tf->uv[1][0]*w[1] + tf->uv[2][0]*w[2];
 202                                         uv[1]= tf->uv[0][1]*w[0] + tf->uv[1][1]*w[1] + tf->uv[2][1]*w[2];
 203                                         minabsw = absw;
 204                                 }
 205                         }
 206                 }
 207         }
 208
 209         dm->release(dm);
 210 }
 211
 212 ///* returns 0 if not found, otherwise 1 */
 213 int imapaint_pick_face(ViewContext *vc, Mesh *me, int *mval, unsigned int *index)
 214 {
 215         if(!me || me->totface==0)
 216                 return 0;
 217
 218         /* sample only on the exact position */
 219         *index = view3d_sample_backbuf(vc, mval[0], mval[1]);
 220
 221         if((*index)<=0 || (*index)>(unsigned int)me->totface)
 222                 return 0;
 223
 224         (*index)--;
 225
 226         return 1;
 227 }
 228
 229 /* used for both 3d view and image window */
 230 void paint_sample_color(Scene *scene, ARegion *ar, int x, int y)        /* frontbuf */
 231 {
 232         Brush *br = paint_brush(paint_get_active(scene));
 233         unsigned int col;
 234         char *cp;
 235
 236         CLAMP(x, 0, ar->winx);
 237         CLAMP(y, 0, ar->winy);
 238
 239         glReadBuffer(GL_FRONT);
 240         glReadPixels(x+ar->winrct.xmin, y+ar->winrct.ymin, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &col);
 241         glReadBuffer(GL_BACK);
 242
 243         cp = (char *)&col;
 244
 245         if(br) {
 246                 br->rgb[0]= cp[0]/255.0f;
 247                 br->rgb[1]= cp[1]/255.0f;
 248                 br->rgb[2]= cp[2]/255.0f;
 249         }
 250 }
 251
 252 static int brush_curve_preset_exec(bContext *C, wmOperator *op)
 253 {
 254         Brush *br = paint_brush(paint_get_active(CTX_data_scene(C)));
 255         brush_curve_preset(br, RNA_enum_get(op->ptr, "shape"));
 256
 257         return OPERATOR_FINISHED;
 258 }
 259
 260 static int brush_curve_preset_poll(bContext *C)
 261 {
 262         Brush *br = paint_brush(paint_get_active(CTX_data_scene(C)));
 263
 264         return br && br->curve;
 265 }
 266
 267 void BRUSH_OT_curve_preset(wmOperatorType *ot)
 268 {
 269         static EnumPropertyItem prop_shape_items[] = {
 270                 {CURVE_PRESET_SHARP, "SHARP", 0, "Sharp", ""},
 271                 {CURVE_PRESET_SMOOTH, "SMOOTH", 0, "Smooth", ""},
 272                 {CURVE_PRESET_MAX, "MAX", 0, "Max", ""},
 273                 {CURVE_PRESET_LINE, "LINE", 0, "Line", ""},
 274                 {CURVE_PRESET_ROUND, "ROUND", 0, "Round", ""},
 275                 {CURVE_PRESET_ROOT, "ROOT", 0, "Root", ""},
 276                 {0, NULL, 0, NULL, NULL}};
 277
 278         ot->name= "Preset";
 279         ot->description= "Set brush shape";
 280         ot->idname= "BRUSH_OT_curve_preset";
 281
 282         ot->exec= brush_curve_preset_exec;
 283         ot->poll= brush_curve_preset_poll;
 284
 285         ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 286
 287         RNA_def_enum(ot->srna, "shape", prop_shape_items, CURVE_PRESET_SMOOTH, "Mode", "");
 288 }
 289
 290
 291 /* face-select ops */
 292 static int paint_select_linked_exec(bContext *C, wmOperator *UNUSED(op))
 293 {
 294         paintface_select_linked(C, CTX_data_active_object(C), NULL, 2);
 295         ED_region_tag_redraw(CTX_wm_region(C));
 296         return OPERATOR_FINISHED;
 297 }
 298
 299 void PAINT_OT_face_select_linked(wmOperatorType *ot)
 300 {
 301         ot->name= "Select Linked";
 302         ot->description= "Select linked faces";
 303         ot->idname= "PAINT_OT_face_select_linked";
 304
 305         ot->exec= paint_select_linked_exec;
 306         ot->poll= facemask_paint_poll;
 307
 308         ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 309 }
 310
 311 static int paint_select_linked_pick_invoke(bContext *C, wmOperator *op, wmEvent *event)
 312 {
 313         int mode= RNA_boolean_get(op->ptr, "extend") ? 1:0;
 314         paintface_select_linked(C, CTX_data_active_object(C), event->mval, mode);
 315         ED_region_tag_redraw(CTX_wm_region(C));
 316         return OPERATOR_FINISHED;
 317 }
 318
 319 void PAINT_OT_face_select_linked_pick(wmOperatorType *ot)
 320 {
 321         ot->name= "Select Linked Pick";
 322         ot->description= "Select linked faces";
 323         ot->idname= "PAINT_OT_face_select_linked_pick";
 324
 325         ot->invoke= paint_select_linked_pick_invoke;
 326         ot->poll= facemask_paint_poll;
 327
 328         ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 329
 330         RNA_def_boolean(ot->srna, "extend", 0, "Extend", "Extend the existing selection");
 331 }
 332
 333
 334 static int face_select_all_exec(bContext *C, wmOperator *op)
 335 {
 336         Object *ob= CTX_data_active_object(C);
 337         paintface_deselect_all_visible(ob, RNA_enum_get(op->ptr, "action"), TRUE);
 338         ED_region_tag_redraw(CTX_wm_region(C));
 339         return OPERATOR_FINISHED;
 340 }
 341
 342
 343 void PAINT_OT_face_select_all(wmOperatorType *ot)
 344 {
 345         ot->name= "Face Selection";
 346         ot->description= "Change selection for all faces";
 347         ot->idname= "PAINT_OT_face_select_all";
 348
 349         ot->exec= face_select_all_exec;
 350         ot->poll= facemask_paint_poll;
 351
 352         ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 353
 354         WM_operator_properties_select_all(ot);
 355 }
 356
 357 static int face_select_inverse_exec(bContext *C, wmOperator *UNUSED(op))
 358 {
 359         Object *ob= CTX_data_active_object(C);
 360         paintface_deselect_all_visible(ob, SEL_INVERT, TRUE);
 361         ED_region_tag_redraw(CTX_wm_region(C));
 362         return OPERATOR_FINISHED;
 363 }
 364
 365
 366 void PAINT_OT_face_select_inverse(wmOperatorType *ot)
 367 {
 368         ot->name= "Face Select Invert";
 369         ot->description= "Invert selection of faces";
 370         ot->idname= "PAINT_OT_face_select_inverse";
 371
 372         ot->exec= face_select_inverse_exec;
 373         ot->poll= facemask_paint_poll;
 374
 375         ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 376 }
 377
 378 static int face_select_hide_exec(bContext *C, wmOperator *op)
 379 {
 380         const int unselected= RNA_boolean_get(op->ptr, "unselected");
 381         Object *ob= CTX_data_active_object(C);
 382         paintface_hide(ob, unselected);
 383         ED_region_tag_redraw(CTX_wm_region(C));
 384         return OPERATOR_FINISHED;
 385 }
 386
 387 void PAINT_OT_face_select_hide(wmOperatorType *ot)
 388 {
 389         ot->name= "Face Select Hide";
 390         ot->description= "Hide selected faces";
 391         ot->idname= "PAINT_OT_face_select_hide";
 392
 393         ot->exec= face_select_hide_exec;
 394         ot->poll= facemask_paint_poll;
 395
 396         ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 397
 398         RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects.");
 399 }
 400
 401 static int face_select_reveal_exec(bContext *C, wmOperator *UNUSED(op))
 402 {
 403         Object *ob= CTX_data_active_object(C);
 404         paintface_reveal(ob);
 405         ED_region_tag_redraw(CTX_wm_region(C));
 406         return OPERATOR_FINISHED;
 407 }
 408
 409 void PAINT_OT_face_select_reveal(wmOperatorType *ot)
 410 {
 411         ot->name= "Face Select Reveal";
 412         ot->description= "Reveal hidden faces";
 413         ot->idname= "PAINT_OT_face_select_reveal";
 414
 415         ot->exec= face_select_reveal_exec;
 416         ot->poll= facemask_paint_poll;
 417
 418         ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 419
 420         RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects.");
 421 }