Pileus Git - grits/blob - src/roam.c

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <glib.h>
  19 #include <math.h>
  20 #include <string.h>
  21 #include "gpqueue.h"
  22 #include <GL/gl.h>
  23 #include <GL/glu.h>
  24
  25 #include "gis-world.h"
  26
  27 #include "roam.h"
  28
  29
  30 /**
  31  * TODO:
  32  *   - Optimize for memory consumption
  33  *   - Profile for computation speed
  34  *   - Target polygon count/detail
  35  */
  36
  37 /* Misc */
  38 RoamView *roam_view_new()
  39 {
  40         return g_new0(RoamView, 1);
  41 }
  42 void roam_view_update(RoamView *view)
  43 {
  44         glGetDoublev (GL_MODELVIEW_MATRIX,  view->model);
  45         glGetDoublev (GL_PROJECTION_MATRIX, view->proj);
  46         glGetIntegerv(GL_VIEWPORT,          view->view);
  47         view->version++;
  48 }
  49
  50 /* For GPQueue comparators */
  51 static gint tri_cmp(RoamTriangle *a, RoamTriangle *b, gpointer data)
  52 {
  53         if      (a->error < b->error) return  1;
  54         else if (a->error > b->error) return -1;
  55         else                          return  0;
  56 }
  57 static gint dia_cmp(RoamDiamond *a, RoamDiamond *b, gpointer data)
  58 {
  59         if      (a->error < b->error) return -1;
  60         else if (a->error > b->error) return  1;
  61         else                          return  0;
  62 }
  63
  64 /*************
  65  * RoamPoint *
  66  *************/
  67 RoamPoint *roam_point_new(gdouble x, gdouble y, gdouble z)
  68 {
  69         RoamPoint *self = g_new0(RoamPoint, 1);
  70         self->x = x;
  71         self->y = y;
  72         self->z = z;
  73         return self;
  74 }
  75 RoamPoint *roam_point_dup(RoamPoint *self)
  76 {
  77         RoamPoint *new = g_memdup(self, sizeof(RoamPoint));
  78         new->tris = 0;
  79         return new;
  80 }
  81 void roam_point_add_triangle(RoamPoint *self, RoamTriangle *triangle)
  82 {
  83         for (int i = 0; i < 3; i++) {
  84                 self->norm[i] *= self->tris;
  85                 self->norm[i] += triangle->norm[i];
  86         }
  87         self->tris++;
  88         for (int i = 0; i < 3; i++)
  89                 self->norm[i] /= self->tris;
  90 }
  91 void roam_point_remove_triangle(RoamPoint *self, RoamTriangle *triangle)
  92 {
  93         for (int i = 0; i < 3; i++) {
  94                 self->norm[i] *= self->tris;
  95                 self->norm[i] -= triangle->norm[i];
  96         }
  97         self->tris--;
  98         if (self->tris)
  99                 for (int i = 0; i < 3; i++)
 100                         self->norm[i] /= self->tris;
 101 }
 102 void roam_point_update_height(RoamPoint *self, RoamSphere *sphere)
 103 {
 104         if (sphere->height_func) {
 105                 sphere->height_func(self, sphere->user_data);
 106         } else {
 107                 gdouble dist = sqrt(self->x * self->x +
 108                                     self->y * self->y +
 109                                     self->z * self->z);
 110                 self->x = self->x/dist * EARTH_R;
 111                 self->y = self->y/dist * EARTH_R;
 112                 self->z = self->z/dist * EARTH_R;
 113         }
 114 }
 115 void roam_point_update_projection(RoamPoint *self, RoamSphere *sphere)
 116 {
 117         static int count   = 0;
 118         static int version = 0;
 119         if (version != sphere->view->version) {
 120                 g_debug("Projected %d points", count);
 121                 count   = 0;
 122                 version = sphere->view->version;
 123         }
 124
 125         if (self->pversion != sphere->view->version) {
 126                 /* Cache projection */
 127                 gluProject(self->x, self->y, self->z,
 128                         sphere->view->model, sphere->view->proj, sphere->view->view,
 129                         &self->px, &self->py, &self->pz);
 130                 self->pversion = sphere->view->version;
 131                 count++;
 132         }
 133 }
 134
 135 /****************
 136  * RoamTriangle *
 137  ****************/
 138 RoamTriangle *roam_triangle_new(RoamPoint *l, RoamPoint *m, RoamPoint *r)
 139 {
 140         RoamTriangle *self = g_new0(RoamTriangle, 1);
 141
 142         self->p.l = l;
 143         self->p.m = m;
 144         self->p.r = r;
 145         self->split = roam_point_new(
 146                 (l->x + r->x)/2,
 147                 (l->y + r->y)/2,
 148                 (l->z + r->z)/2);
 149
 150         self->error = 0;
 151
 152         /* Update normal */
 153         double pa[3];
 154         double pb[3];
 155         pa[0] = self->p.l->x - self->p.m->x;
 156         pa[1] = self->p.l->y - self->p.m->y;
 157         pa[2] = self->p.l->z - self->p.m->z;
 158
 159         pb[0] = self->p.r->x - self->p.m->x;
 160         pb[1] = self->p.r->y - self->p.m->y;
 161         pb[2] = self->p.r->z - self->p.m->z;
 162
 163         self->norm[0] = pa[1] * pb[2] - pa[2] * pb[1];
 164         self->norm[1] = pa[2] * pb[0] - pa[0] * pb[2];
 165         self->norm[2] = pa[0] * pb[1] - pa[1] * pb[0];
 166
 167         double total = sqrt(self->norm[0] * self->norm[0] +
 168                             self->norm[1] * self->norm[1] +
 169                             self->norm[2] * self->norm[2]);
 170
 171         self->norm[0] /= total;
 172         self->norm[1] /= total;
 173         self->norm[2] /= total;
 174
 175         //g_message("roam_triangle_new: %p", self);
 176         return self;
 177 }
 178
 179 void roam_triangle_free(RoamTriangle *self)
 180 {
 181         g_free(self->split);
 182         g_free(self);
 183 }
 184
 185 void roam_triangle_add(RoamTriangle *self,
 186                 RoamTriangle *left, RoamTriangle *base, RoamTriangle *right,
 187                 RoamSphere *sphere)
 188 {
 189         self->t.l = left;
 190         self->t.b = base;
 191         self->t.r = right;
 192
 193         roam_point_add_triangle(self->p.l, self);
 194         roam_point_add_triangle(self->p.m, self);
 195         roam_point_add_triangle(self->p.r, self);
 196
 197         if (sphere->view)
 198                 roam_triangle_update_errors(self, sphere);
 199
 200         self->handle = g_pqueue_push(sphere->triangles, self);
 201 }
 202
 203 void roam_triangle_remove(RoamTriangle *self, RoamSphere *sphere)
 204 {
 205         /* Update vertex normals */
 206         roam_point_remove_triangle(self->p.l, self);
 207         roam_point_remove_triangle(self->p.m, self);
 208         roam_point_remove_triangle(self->p.r, self);
 209
 210         g_pqueue_remove(sphere->triangles, self->handle);
 211 }
 212
 213 void roam_triangle_sync_neighbors(RoamTriangle *new, RoamTriangle *old, RoamTriangle *neigh)
 214 {
 215         if      (neigh->t.l == old) neigh->t.l = new;
 216         else if (neigh->t.b == old) neigh->t.b = new;
 217         else if (neigh->t.r == old) neigh->t.r = new;
 218         else g_assert_not_reached();
 219 }
 220
 221 gboolean roam_point_visible(RoamPoint *self, RoamSphere *sphere)
 222 {
 223         gint *view = sphere->view->view;
 224         return self->px > view[0] && self->px < view[2] &&
 225                self->py > view[1] && self->py < view[3] &&
 226                self->pz > 0       && self->pz < 1;
 227 }
 228 gboolean roam_triangle_visible(RoamTriangle *self, RoamSphere *sphere)
 229 {
 230         /* Do this with a bounding box */
 231         return roam_point_visible(self->p.l, sphere) ||
 232                roam_point_visible(self->p.m, sphere) ||
 233                roam_point_visible(self->p.r, sphere);
 234 }
 235
 236 void roam_triangle_update_errors(RoamTriangle *self, RoamSphere *sphere)
 237 {
 238         /* Update points */
 239         roam_point_update_projection(self->p.l, sphere);
 240         roam_point_update_projection(self->p.m, sphere);
 241         roam_point_update_projection(self->p.r, sphere);
 242         roam_point_update_projection(self->split, sphere);
 243
 244         /* Not exactly correct, could be out on both sides (middle in) */
 245         if (!roam_triangle_visible(self, sphere)) {
 246                 self->error = -1;
 247         } else {
 248                 RoamPoint *l = self->p.l;
 249                 RoamPoint *m = self->p.m;
 250                 RoamPoint *r = self->p.r;
 251                 RoamPoint *split = self->split;
 252
 253                 /*               l-r midpoint        projected l-r midpoint */
 254                 gdouble pxdist = (l->px + r->px)/2 - split->px;
 255                 gdouble pydist = (l->py + r->py)/2 - split->py;
 256
 257                 self->error = sqrt(pxdist*pxdist + pydist*pydist);
 258
 259                 /* Multiply by size of triangle */
 260                 double size = -( l->px * (m->py - r->py) +
 261                                  m->px * (r->py - l->py) +
 262                                  r->px * (l->py - m->py) ) / 2.0;
 263
 264                 /* Size < 0 == backface */
 265                 self->error *= size;
 266         }
 267 }
 268
 269 void roam_triangle_split(RoamTriangle *self, RoamSphere *sphere)
 270 {
 271         //g_message("roam_triangle_split: %p, e=%f\n", self, self->error);
 272
 273         sphere->polys += 2;
 274
 275         if (self != self->t.b->t.b)
 276                 roam_triangle_split(self->t.b, sphere);
 277
 278         RoamTriangle *base = self->t.b;
 279
 280         /* Add new triangles */
 281         RoamPoint *mid = self->split;
 282         RoamTriangle *sl = roam_triangle_new(self->p.m, mid, self->p.l); // Self Left
 283         RoamTriangle *sr = roam_triangle_new(self->p.r, mid, self->p.m); // Self Right
 284         RoamTriangle *bl = roam_triangle_new(base->p.m, mid, base->p.l); // Base Left
 285         RoamTriangle *br = roam_triangle_new(base->p.r, mid, base->p.m); // Base Right
 286
 287         roam_point_update_height(sl->split, sphere);
 288         roam_point_update_height(sr->split, sphere);
 289         roam_point_update_height(bl->split, sphere);
 290         roam_point_update_height(br->split, sphere);
 291
 292         /*                tri,l,  base,      r,  sphere */
 293         roam_triangle_add(sl, sr, self->t.l, br, sphere);
 294         roam_triangle_add(sr, bl, self->t.r, sl, sphere);
 295         roam_triangle_add(bl, br, base->t.l, sr, sphere);
 296         roam_triangle_add(br, sl, base->t.r, bl, sphere);
 297
 298         roam_triangle_sync_neighbors(sl, self, self->t.l);
 299         roam_triangle_sync_neighbors(sr, self, self->t.r);
 300         roam_triangle_sync_neighbors(bl, base, base->t.l);
 301         roam_triangle_sync_neighbors(br, base, base->t.r);
 302
 303         /* Remove old triangles */
 304         roam_triangle_remove(self, sphere);
 305         roam_triangle_remove(base, sphere);
 306
 307         /* Add/Remove diamonds */
 308         RoamDiamond *diamond = roam_diamond_new(self, base, sl, sr, bl, br);
 309         roam_diamond_update_errors(diamond, sphere);
 310         roam_diamond_add(diamond, sphere);
 311         roam_diamond_remove(self->parent, sphere);
 312         roam_diamond_remove(base->parent, sphere);
 313 }
 314
 315 void roam_triangle_draw(RoamTriangle *self)
 316 {
 317         glBegin(GL_TRIANGLES);
 318         glNormal3dv(self->p.r->norm); glVertex3dv((double*)self->p.r);
 319         glNormal3dv(self->p.m->norm); glVertex3dv((double*)self->p.m);
 320         glNormal3dv(self->p.l->norm); glVertex3dv((double*)self->p.l);
 321         glEnd();
 322         return;
 323 }
 324
 325 void roam_triangle_draw_normal(RoamTriangle *self)
 326 {
 327         double center[] = {
 328                 (self->p.l->x + self->p.m->x + self->p.r->x)/3.0,
 329                 (self->p.l->y + self->p.m->y + self->p.r->y)/3.0,
 330                 (self->p.l->z + self->p.m->z + self->p.r->z)/3.0,
 331         };
 332         double end[] = {
 333                 center[0]+self->norm[0]*2000000,
 334                 center[1]+self->norm[1]*2000000,
 335                 center[2]+self->norm[2]*2000000,
 336         };
 337         glBegin(GL_LINES);
 338         glVertex3dv(center);
 339         glVertex3dv(end);
 340         glEnd();
 341 }
 342
 343 /***************
 344  * RoamDiamond *
 345  ***************/
 346 RoamDiamond *roam_diamond_new(
 347                 RoamTriangle *parent0, RoamTriangle *parent1,
 348                 RoamTriangle *kid0, RoamTriangle *kid1,
 349                 RoamTriangle *kid2, RoamTriangle *kid3)
 350 {
 351         RoamDiamond *self = g_new0(RoamDiamond, 1);
 352
 353         self->kids[0] = kid0;
 354         self->kids[1] = kid1;
 355         self->kids[2] = kid2;
 356         self->kids[3] = kid3;
 357
 358         kid0->parent = self;
 359         kid1->parent = self;
 360         kid2->parent = self;
 361         kid3->parent = self;
 362
 363         self->parents[0] = parent0;
 364         self->parents[1] = parent1;
 365
 366         return self;
 367 }
 368 void roam_diamond_add(RoamDiamond *self, RoamSphere *sphere)
 369 {
 370         self->active = TRUE;
 371         self->error  = MAX(self->parents[0]->error, self->parents[1]->error);
 372         self->handle = g_pqueue_push(sphere->diamonds, self);
 373 }
 374 void roam_diamond_remove(RoamDiamond *self, RoamSphere *sphere)
 375 {
 376         if (self && self->active) {
 377                 self->active = FALSE;
 378                 g_pqueue_remove(sphere->diamonds, self->handle);
 379         }
 380 }
 381 void roam_diamond_merge(RoamDiamond *self, RoamSphere *sphere)
 382 {
 383         //g_message("roam_diamond_merge: %p, e=%f\n", self, self->error);
 384
 385         sphere->polys -= 2;
 386
 387         /* TODO: pick the best split */
 388         RoamTriangle **kids = self->kids;
 389
 390         /* Create triangles */
 391         RoamTriangle *tri  = self->parents[0];
 392         RoamTriangle *base = self->parents[1];
 393
 394         roam_triangle_add(tri,  kids[0]->t.b, base, kids[1]->t.b, sphere);
 395         roam_triangle_add(base, kids[2]->t.b, tri,  kids[3]->t.b, sphere);
 396
 397         roam_triangle_sync_neighbors(tri,  kids[0], kids[0]->t.b);
 398         roam_triangle_sync_neighbors(tri,  kids[1], kids[1]->t.b);
 399         roam_triangle_sync_neighbors(base, kids[2], kids[2]->t.b);
 400         roam_triangle_sync_neighbors(base, kids[3], kids[3]->t.b);
 401
 402         /* Remove triangles */
 403         roam_triangle_remove(kids[0], sphere);
 404         roam_triangle_remove(kids[1], sphere);
 405         roam_triangle_remove(kids[2], sphere);
 406         roam_triangle_remove(kids[3], sphere);
 407
 408         /* Add/Remove triangles */
 409         if (tri->t.l->t.l == tri->t.r->t.r &&
 410             tri->t.l->t.l != tri && tri->parent) {
 411                 roam_diamond_update_errors(tri->parent, sphere);
 412                 roam_diamond_add(tri->parent, sphere);
 413         }
 414
 415         if (base->t.l->t.l == base->t.r->t.r &&
 416             base->t.l->t.l != base && base->parent) {
 417                 roam_diamond_update_errors(base->parent, sphere);
 418                 roam_diamond_add(base->parent, sphere);
 419         }
 420
 421         /* Remove and free diamond and child triangles */
 422         roam_diamond_remove(self, sphere);
 423         g_assert(self->kids[0]->p.m == self->kids[1]->p.m &&
 424                  self->kids[1]->p.m == self->kids[2]->p.m &&
 425                  self->kids[2]->p.m == self->kids[3]->p.m);
 426         g_assert(self->kids[0]->p.m->tris == 0);
 427         roam_triangle_free(self->kids[0]);
 428         roam_triangle_free(self->kids[1]);
 429         roam_triangle_free(self->kids[2]);
 430         roam_triangle_free(self->kids[3]);
 431         g_free(self);
 432 }
 433 void roam_diamond_update_errors(RoamDiamond *self, RoamSphere *sphere)
 434 {
 435         roam_triangle_update_errors(self->parents[0], sphere);
 436         roam_triangle_update_errors(self->parents[1], sphere);
 437         self->error = MAX(self->parents[0]->error, self->parents[1]->error);
 438 }
 439
 440 /**************
 441  * RoamSphere *
 442  **************/
 443 RoamSphere *roam_sphere_new(gpointer user_data)
 444 {
 445         RoamSphere *self = g_new0(RoamSphere, 1);
 446         self->user_data   = user_data;
 447         self->polys       = 12;
 448         self->triangles   = g_pqueue_new((GCompareDataFunc)tri_cmp, NULL);
 449         self->diamonds    = g_pqueue_new((GCompareDataFunc)dia_cmp, NULL);
 450
 451         RoamPoint *vertexes[] = {
 452                 roam_point_new( 1, 1, 1), // 0
 453                 roam_point_new( 1, 1,-1), // 1
 454                 roam_point_new( 1,-1, 1), // 2
 455                 roam_point_new( 1,-1,-1), // 3
 456                 roam_point_new(-1, 1, 1), // 4
 457                 roam_point_new(-1, 1,-1), // 5
 458                 roam_point_new(-1,-1, 1), // 6
 459                 roam_point_new(-1,-1,-1), // 7
 460         };
 461         int _triangles[][2][3] = {
 462                 /*lv mv rv   ln, bn, rn */
 463                 {{3,2,0}, {10, 1, 7}}, // 0
 464                 {{0,1,3}, { 9, 0, 2}}, // 1
 465                 {{7,3,1}, {11, 3, 1}}, // 2
 466                 {{1,5,7}, { 8, 2, 4}}, // 3
 467                 {{6,7,5}, {11, 5, 3}}, // 4
 468                 {{5,4,6}, { 8, 4, 6}}, // 5
 469                 {{2,6,4}, {10, 7, 5}}, // 6
 470                 {{4,0,2}, { 9, 6, 0}}, // 7
 471                 {{4,5,1}, { 5, 9, 3}}, // 8
 472                 {{1,0,4}, { 1, 8, 7}}, // 9
 473                 {{6,2,3}, { 6,11, 0}}, // 10
 474                 {{3,7,6}, { 2,10, 4}}, // 11
 475         };
 476         RoamTriangle *triangles[12];
 477
 478         for (int i = 0; i < 8; i++)
 479                 roam_point_update_height(vertexes[i], self);
 480         for (int i = 0; i < 12; i++)
 481                 triangles[i] = roam_triangle_new(
 482                         vertexes[_triangles[i][0][0]],
 483                         vertexes[_triangles[i][0][1]],
 484                         vertexes[_triangles[i][0][2]]);
 485         for (int i = 0; i < 12; i++)
 486                 roam_point_update_height(triangles[i]->split, self);
 487         for (int i = 0; i < 12; i++)
 488                 roam_triangle_add(triangles[i],
 489                         triangles[_triangles[i][1][0]],
 490                         triangles[_triangles[i][1][1]],
 491                         triangles[_triangles[i][1][2]],
 492                         self);
 493
 494         return self;
 495 }
 496 void roam_sphere_update_errors(RoamSphere *self)
 497 {
 498         g_debug("RoamSphere: update_errors - polys=%d", self->polys);
 499         if (!self->view)
 500                 self->view = roam_view_new();
 501         roam_view_update(self->view);
 502
 503         GPtrArray *tris = g_pqueue_get_array(self->triangles);
 504         GPtrArray *dias = g_pqueue_get_array(self->diamonds);
 505
 506         for (int i = 0; i < tris->len; i++) {
 507                 RoamTriangle *tri = tris->pdata[i];
 508                 roam_triangle_update_errors(tri, self);
 509                 g_pqueue_priority_changed(self->triangles, tri->handle);
 510         }
 511
 512         for (int i = 0; i < dias->len; i++) {
 513                 RoamDiamond *dia = dias->pdata[i];
 514                 roam_diamond_update_errors(dia, self);
 515                 g_pqueue_priority_changed(self->diamonds, dia->handle);
 516         }
 517
 518         g_ptr_array_free(tris, TRUE);
 519         g_ptr_array_free(dias, TRUE);
 520 }
 521
 522 void roam_sphere_split_one(RoamSphere *self)
 523 {
 524         RoamTriangle *to_split = g_pqueue_peek(self->triangles);
 525         if (!to_split) return;
 526         roam_triangle_split(to_split, self);
 527 }
 528 void roam_sphere_merge_one(RoamSphere *self)
 529 {
 530         RoamDiamond *to_merge = g_pqueue_peek(self->diamonds);
 531         if (!to_merge) return;
 532         roam_diamond_merge(to_merge, self);
 533 }
 534 gint roam_sphere_split_merge(RoamSphere *self)
 535 {
 536         gint iters = 0, max_iters = 500;
 537         //gint target = 4000;
 538         gint target = 2000;
 539         //gint target = 500;
 540
 541         if (!self->view)
 542                 return 0;
 543
 544         if (target - self->polys > 100) {
 545                 //g_debug("RoamSphere: split_merge - Splitting %d - %d > 100", target, self->polys);
 546                 while (self->polys < target && iters++ < max_iters)
 547                         roam_sphere_split_one(self);
 548         }
 549
 550         if (self->polys - target > 100) {
 551                 //g_debug("RoamSphere: split_merge - Merging %d - %d > 100", self->polys, target);
 552                 while (self->polys > target && iters++ < max_iters)
 553                         roam_sphere_merge_one(self);
 554         }
 555
 556         while (((RoamTriangle*)g_pqueue_peek(self->triangles))->error >
 557                ((RoamDiamond *)g_pqueue_peek(self->diamonds ))->error &&
 558                iters++ < max_iters) {
 559                 //g_debug("RoamSphere: split_merge - Fixing 1 %f > %f && %d < %d",
 560                 //              ((RoamTriangle*)g_pqueue_peek(self->triangles))->error,
 561                 //              ((RoamDiamond *)g_pqueue_peek(self->diamonds ))->error,
 562                 //              iters-1, max_iters);
 563                 roam_sphere_merge_one(self);
 564                 roam_sphere_split_one(self);
 565         }
 566
 567         return iters;
 568 }
 569 void roam_sphere_draw(RoamSphere *self)
 570 {
 571         g_debug("RoamSphere: draw");
 572         g_pqueue_foreach(self->triangles, (GFunc)roam_triangle_draw, NULL);
 573 }
 574 void roam_sphere_draw_normals(RoamSphere *self)
 575 {
 576         g_debug("RoamSphere: draw_normal");
 577         g_pqueue_foreach(self->triangles, (GFunc)roam_triangle_draw_normal, NULL);
 578 }
 579 void roam_sphere_free_tri(RoamTriangle *tri)
 580 {
 581         if (--tri->p.l->tris == 0) g_free(tri->p.l);
 582         if (--tri->p.m->tris == 0) g_free(tri->p.m);
 583         if (--tri->p.r->tris == 0) g_free(tri->p.r);
 584         roam_triangle_free(tri);
 585 }
 586 void roam_sphere_free(RoamSphere *self)
 587 {
 588         /* Slow method, but it should work */
 589         while (self->polys > 12)
 590                 roam_sphere_merge_one(self);
 591         /* TODO: free points */
 592         g_pqueue_foreach(self->triangles, (GFunc)roam_sphere_free_tri, NULL);
 593         g_pqueue_free(self->triangles);
 594         g_pqueue_free(self->diamonds);
 595         g_free(self->view);
 596         g_free(self);
 597 }