2 * Copyright (C) 2009-2011 Andy Spencer <andy753421@gmail.com>
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.
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.
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/>.
19 * SECTION:grits-opengl
20 * @short_description: OpenGL based virtual globe
22 * #GritsOpenGL is the core rendering engine used by grits. Theoretically other
23 * renderers could be writte, but they have not been. GritsOpenGL uses the ROAM
24 * algorithm for updating surface mesh the planet. The only thing GritsOpenGL
25 * can actually render on it's own is a wireframe of a sphere.
27 * GritsOpenGL requires (at least) OpenGL 2.0.
33 #include <gdk/gdkkeysyms.h>
36 #include "grits-opengl.h"
37 #include "grits-util.h"
43 /* Tessellation, "finding intersecting triangles" */
44 /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
45 /* http://www.opengl.org/wiki/Alpha_Blending */
47 /* The unsorted/sroted GLists are blank head nodes,
48 * This way us we can remove objects from the level just by fixing up links
49 * I.e. we don't need to do a lookup to remove an object if we have its GList */
58 static void _set_visuals(GritsOpenGL *opengl)
60 double lat, lon, elev, rx, ry, rz;
61 grits_viewer_get_location(GRITS_VIEWER(opengl), &lat, &lon, &elev);
62 grits_viewer_get_rotation(GRITS_VIEWER(opengl), &rx, &ry, &rz);
64 /* Set projection and clipping planes */
65 glMatrixMode(GL_PROJECTION);
68 double width = GTK_WIDGET(opengl)->allocation.width;
69 double height = GTK_WIDGET(opengl)->allocation.height;
70 double ang = atan((height/2)/FOV_DIST)*2;
71 double atmos = 100000;
72 double near = MAX(elev*0.75 - atmos, 50); // View 100km of atmosphere
73 double far = elev + 2*EARTH_R + atmos; // on both sides of the earth
75 grits_viewer_get_location(GRITS_VIEWER(opengl), &lat, &lon, &elev);
76 glViewport(0, 0, width, height);
77 gluPerspective(rad2deg(ang), width/height, near, far);
79 /* Setup camera and lighting */
80 glMatrixMode(GL_MODELVIEW);
84 glRotatef(rx, 1, 0, 0);
85 glRotatef(rz, 0, 0, 1);
89 float light_ambient[] = {0.7f, 0.7f, 0.7f, 1.0f};
90 float light_diffuse[] = {2.0f, 2.0f, 2.0f, 1.0f};
92 float light_ambient[] = {0.2f, 0.2f, 0.2f, 1.0f};
93 float light_diffuse[] = {0.8f, 0.8f, 0.8f, 1.0f};
95 float light_position[] = {-13*EARTH_R, 1*EARTH_R, 3*EARTH_R, 1.0f};
96 glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
97 glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
98 glLightfv(GL_LIGHT0, GL_POSITION, light_position);
100 glEnable(GL_LIGHTING);
102 float material_ambient[] = {1.0, 1.0, 1.0, 1.0};
103 float material_diffuse[] = {1.0, 1.0, 1.0, 1.0};
104 float material_specular[] = {0.0, 0.0, 0.0, 1.0};
105 float material_emission[] = {0.0, 0.0, 0.0, 1.0};
106 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, material_ambient);
107 glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, material_diffuse);
108 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, material_specular);
109 glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, material_emission);
110 glDisable(GL_TEXTURE_2D);
111 glDisable(GL_COLOR_MATERIAL);
114 glTranslatef(0, 0, -elev2rad(elev));
115 glRotatef(lat, 1, 0, 0);
116 glRotatef(-lon, 0, 1, 0);
118 glDisable(GL_ALPHA_TEST);
120 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
125 glEnable(GL_CULL_FACE);
128 glDepthFunc(GL_LEQUAL);
129 glEnable(GL_DEPTH_TEST);
132 glEnable(GL_LINE_SMOOTH);
134 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
135 //glShadeModel(GL_FLAT);
137 g_mutex_lock(opengl->sphere_lock);
138 roam_sphere_update_view(opengl->sphere);
139 g_mutex_unlock(opengl->sphere_lock);
142 typedef void (*GritsLevelFunc)(GritsObject *obj, gpointer user_data, gint level, gboolean sorted);
144 static gboolean _foreach_object_cb(gpointer key, gpointer value, gpointer pointers)
146 struct RenderLevel *level = value;
147 GritsLevelFunc user_func = ((gpointer*)pointers)[0];
148 gpointer user_data = ((gpointer*)pointers)[1];
149 for (GList *cur = level->unsorted.next; cur; cur = cur->next)
150 user_func(cur->data, user_data, (gint)key, FALSE);
151 for (GList *cur = level->sorted.next; cur; cur = cur->next)
152 user_func(cur->data, user_data, (gint)key, TRUE);
156 static void _foreach_object(GritsOpenGL *opengl, GritsLevelFunc func, gpointer user_data)
158 gpointer pointers[2] = {func, user_data};
159 g_tree_foreach(opengl->objects, _foreach_object_cb, pointers);
162 static void _add_object_world(GritsObject *object, GPtrArray *array, gint level, gboolean sorted)
164 if (level < GRITS_LEVEL_HUD)
165 g_ptr_array_add(array, object);
168 static void _add_object_ortho(GritsObject *object, GPtrArray *array, gint level, gboolean sorted)
170 if (level >= GRITS_LEVEL_HUD)
171 g_ptr_array_add(array, object);
174 static GPtrArray *_objects_to_array(GritsOpenGL *opengl, gboolean ortho)
176 GPtrArray *array = g_ptr_array_new();
177 GritsLevelFunc func = (GritsLevelFunc)(ortho ? _add_object_ortho : _add_object_world);
178 _foreach_object(opengl, func, array);
185 static gboolean on_configure(GritsOpenGL *opengl, GdkEventConfigure *event, gpointer _)
187 g_debug("GritsOpenGL: on_configure");
189 _set_visuals(opengl);
191 g_mutex_lock(opengl->sphere_lock);
192 roam_sphere_update_errors(opengl->sphere);
193 g_mutex_unlock(opengl->sphere_lock);
199 static gint run_picking(GritsOpenGL *opengl, GPtrArray *objects)
201 /* Setup picking buffers */
202 guint buffer[100][4] = {};
203 glSelectBuffer(G_N_ELEMENTS(buffer), (guint*)buffer);
204 if (!opengl->pickmode)
205 glRenderMode(GL_SELECT);
208 /* Render/pick objects */
209 for (guint i = 0; i < objects->len; i++) {
211 GritsObject *object = objects->pdata[i];
212 object->state.picked = FALSE;
213 grits_object_pick(object, opengl);
217 int hits = glRenderMode(GL_RENDER);
220 for (int i = 0; i < hits; i++) {
221 //g_debug("\tHit: %d", i);
222 //g_debug("\t\tcount: %d", buffer[i][0]);
223 //g_debug("\t\tz1: %f", (float)buffer[i][1]/0x7fffffff);
224 //g_debug("\t\tz2: %f", (float)buffer[i][2]/0x7fffffff);
225 //g_debug("\t\tname: %p", (gpointer)buffer[i][3]);
226 guint index = buffer[i][3];
227 GritsObject *object = objects->pdata[index];
228 object->state.picked = TRUE;
231 /* Notify objects of pointer movements */
232 for (guint i = 0; i < objects->len; i++) {
233 GritsObject *object = objects->pdata[i];
234 grits_object_set_pointer(object, object->state.picked);
240 static gboolean on_motion_notify(GritsOpenGL *opengl, GdkEventMotion *event, gpointer _)
242 gdouble height = GTK_WIDGET(opengl)->allocation.height;
243 gdouble gl_x = event->x;
244 gdouble gl_y = height - event->y;
245 gdouble delta = opengl->pickmode ? 200 : 2;
247 if (opengl->pickmode) {
248 gtk_gl_begin(GTK_WIDGET(opengl));
249 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
253 gdouble projection[16];
254 gint viewport[4]; // x=0,y=0,w,h
255 glGetDoublev(GL_PROJECTION_MATRIX, projection);
256 glGetIntegerv(GL_VIEWPORT, viewport);
257 glMatrixMode(GL_MODELVIEW); glPushMatrix();
258 glMatrixMode(GL_PROJECTION); glPushMatrix();
260 g_mutex_lock(opengl->objects_lock);
262 GPtrArray *ortho = _objects_to_array(opengl, TRUE);
263 GPtrArray *world = _objects_to_array(opengl, FALSE);
265 /* Run perspective picking */
266 glMatrixMode(GL_PROJECTION); glLoadIdentity();
267 gluPickMatrix(gl_x, gl_y, delta, delta, viewport);
268 glMultMatrixd(projection);
269 gint world_hits = run_picking(opengl, world);
271 /* Run ortho picking */
272 glMatrixMode(GL_PROJECTION); glLoadIdentity();
273 gluPickMatrix(gl_x, gl_y, delta, delta, viewport);
274 glMatrixMode(GL_MODELVIEW); glLoadIdentity();
275 glOrtho(0, viewport[2], viewport[3], 0, 1000, -1000);
276 gint ortho_hits = run_picking(opengl, ortho);
278 g_debug("GritsOpenGL: on_motion_notify - hits=%d/%d,%d/%d ev=%.0lf,%.0lf",
279 world_hits, world->len, ortho_hits, ortho->len, gl_x, gl_y);
281 g_ptr_array_free(world, TRUE);
282 g_ptr_array_free(ortho, TRUE);
284 g_mutex_unlock(opengl->objects_lock);
288 //gdouble lat, lon, elev;
289 //grits_viewer_unproject(GRITS_VIEWER(opengl),
290 // gl_x, gl_y, -1, &lat, &lon, &elev);
293 glMatrixMode(GL_PROJECTION); glPopMatrix();
294 glMatrixMode(GL_MODELVIEW); glPopMatrix();
296 if (opengl->pickmode)
297 gtk_gl_end(GTK_WIDGET(opengl));
302 static gboolean _draw_level(gpointer key, gpointer value, gpointer user_data)
304 GritsOpenGL *opengl = user_data;
305 glong lnum = (glong)key;
306 struct RenderLevel *level = value;
308 g_debug("GritsOpenGL: _draw_level - level=%-4ld", lnum);
309 int nsorted = 0, nunsorted = 0;
312 /* Configure individual levels */
313 if (lnum < GRITS_LEVEL_WORLD) {
314 /* Disable depth for background levels */
316 glDisable(GL_ALPHA_TEST);
317 } else if (lnum < GRITS_LEVEL_OVERLAY) {
318 /* Enable depth and alpha for world levels */
319 glEnable(GL_ALPHA_TEST);
320 glAlphaFunc(GL_GREATER, 0.1);
323 /* Disable depth for Overlay/HUD levels */
324 // This causes rendering glitches not sure why..
325 //glDepthMask(FALSE);
329 if (lnum >= GRITS_LEVEL_HUD) {
330 glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
331 glMatrixMode(GL_MODELVIEW); glPushMatrix(); glLoadIdentity();
332 gint win_width = GTK_WIDGET(opengl)->allocation.width;
333 gint win_height = GTK_WIDGET(opengl)->allocation.height;
334 glOrtho(0, win_width, win_height, 0, 1000, -1000);
337 /* Draw unsorted objects without depth testing,
338 * these are polygons, etc, rather than physical objects */
339 glDisable(GL_DEPTH_TEST);
340 for (cur = level->unsorted.next; cur; cur = cur->next, nunsorted++)
341 grits_object_draw(GRITS_OBJECT(cur->data), opengl);
343 /* Draw sorted objects using depth testing
344 * These are things that are actually part of the world */
345 glEnable(GL_DEPTH_TEST);
346 for (cur = level->sorted.next; cur; cur = cur->next, nsorted++)
347 grits_object_draw(GRITS_OBJECT(cur->data), opengl);
350 if (lnum >= GRITS_LEVEL_HUD) {
351 glMatrixMode(GL_PROJECTION); glPopMatrix();
352 glMatrixMode(GL_MODELVIEW); glPopMatrix();
355 /* TODO: Prune empty levels */
357 g_debug("GritsOpenGL: _draw_level - drew %d,%d objects",
362 static gboolean on_expose(GritsOpenGL *opengl, GdkEventExpose *event, gpointer _)
364 g_debug("GritsOpenGL: on_expose - begin");
366 if (opengl->pickmode)
367 return on_motion_notify(opengl, (GdkEventMotion*)event, NULL);
369 gtk_gl_begin(GTK_WIDGET(opengl));
371 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
373 _set_visuals(opengl);
375 glColor4f(1.0, 1.0, 1.0, 1.0);
377 glDisable(GL_TEXTURE_2D);
378 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
379 roam_sphere_draw(opengl->sphere);
381 //roam_sphere_draw_normals(opengl->sphere);
383 g_mutex_lock(opengl->objects_lock);
384 if (opengl->wireframe)
385 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
386 g_tree_foreach(opengl->objects, _draw_level, opengl);
387 g_mutex_unlock(opengl->objects_lock);
390 gtk_gl_end(GTK_WIDGET(opengl));
392 g_debug("GritsOpenGL: on_expose - end\n");
396 static gboolean on_key_press(GritsOpenGL *opengl, GdkEventKey *event, gpointer _)
398 g_debug("GritsOpenGL: on_key_press - key=%x, state=%x, plus=%x",
399 event->keyval, event->state, GDK_plus);
401 guint kv = event->keyval;
404 opengl->wireframe = !opengl->wireframe;
405 gtk_widget_queue_draw(GTK_WIDGET(opengl));
408 opengl->pickmode = !opengl->pickmode;
409 gtk_widget_queue_draw(GTK_WIDGET(opengl));
412 else if (kv == GDK_n) roam_sphere_split_one(opengl->sphere);
413 else if (kv == GDK_p) roam_sphere_merge_one(opengl->sphere);
414 else if (kv == GDK_r) roam_sphere_split_merge(opengl->sphere);
415 else if (kv == GDK_u) roam_sphere_update_errors(opengl->sphere);
416 gtk_widget_queue_draw(GTK_WIDGET(opengl));
421 static gboolean on_chained_event(GritsOpenGL *opengl, GdkEvent *event, gpointer _)
423 _foreach_object(opengl, (GritsLevelFunc)grits_object_event, event);
427 static gboolean _update_errors_cb(gpointer _opengl)
429 GritsOpenGL *opengl = _opengl;
430 g_mutex_lock(opengl->sphere_lock);
431 roam_sphere_update_errors(opengl->sphere);
432 g_mutex_unlock(opengl->sphere_lock);
433 opengl->ue_source = 0;
436 static void on_view_changed(GritsOpenGL *opengl,
437 gdouble _1, gdouble _2, gdouble _3)
439 g_debug("GritsOpenGL: on_view_changed");
440 _set_visuals(opengl);
442 if (!opengl->ue_source)
443 opengl->ue_source = g_idle_add_full(G_PRIORITY_HIGH_IDLE+30,
444 _update_errors_cb, opengl, NULL);
445 //roam_sphere_update_errors(opengl->sphere);
447 (void)_update_errors_cb;
451 static gboolean on_idle(GritsOpenGL *opengl)
453 //g_debug("GritsOpenGL: on_idle");
454 g_mutex_lock(opengl->sphere_lock);
455 if (roam_sphere_split_merge(opengl->sphere))
456 gtk_widget_queue_draw(GTK_WIDGET(opengl));
457 g_mutex_unlock(opengl->sphere_lock);
461 static void on_realize(GritsOpenGL *opengl, gpointer _)
463 g_debug("GritsOpenGL: on_realize");
464 gtk_gl_begin(GTK_WIDGET(opengl));
466 /* Connect signals and idle functions now that opengl is fully initialized */
467 gtk_widget_add_events(GTK_WIDGET(opengl), GDK_KEY_PRESS_MASK);
468 g_signal_connect(opengl, "configure-event", G_CALLBACK(on_configure), NULL);
469 g_signal_connect(opengl, "expose-event", G_CALLBACK(on_expose), NULL);
471 g_signal_connect(opengl, "key-press-event", G_CALLBACK(on_key_press), NULL);
473 g_signal_connect(opengl, "location-changed", G_CALLBACK(on_view_changed), NULL);
474 g_signal_connect(opengl, "rotation-changed", G_CALLBACK(on_view_changed), NULL);
476 g_signal_connect(opengl, "motion-notify-event", G_CALLBACK(on_motion_notify), NULL);
477 g_signal_connect_after(opengl, "key-press-event", G_CALLBACK(on_chained_event), NULL);
478 g_signal_connect_after(opengl, "key-release-event", G_CALLBACK(on_chained_event), NULL);
479 g_signal_connect_after(opengl, "button-press-event", G_CALLBACK(on_chained_event), NULL);
480 g_signal_connect_after(opengl, "button-release-event", G_CALLBACK(on_chained_event), NULL);
481 g_signal_connect_after(opengl, "motion-notify-event", G_CALLBACK(on_chained_event), NULL);
484 opengl->sm_source[0] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+30, 33, (GSourceFunc)on_idle, opengl, NULL);
485 opengl->sm_source[1] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+10, 500, (GSourceFunc)on_idle, opengl, NULL);
488 (void)_update_errors_cb;
491 /* Re-queue resize incase configure was triggered before realize */
492 gtk_widget_queue_resize(GTK_WIDGET(opengl));
495 /*********************
496 * GritsViewer methods *
497 *********************/
500 * @plugins: the plugins store to use
501 * @prefs: the preferences object to use
503 * Create a new OpenGL renderer.
505 * Returns: the new #GritsOpenGL
507 GritsViewer *grits_opengl_new(GritsPlugins *plugins, GritsPrefs *prefs)
509 g_debug("GritsOpenGL: new");
510 GritsViewer *opengl = g_object_new(GRITS_TYPE_OPENGL, NULL);
511 grits_viewer_setup(opengl, plugins, prefs);
515 static void grits_opengl_center_position(GritsViewer *_opengl, gdouble lat, gdouble lon, gdouble elev)
517 glRotatef(lon, 0, 1, 0);
518 glRotatef(-lat, 1, 0, 0);
519 glTranslatef(0, 0, elev2rad(elev));
522 static void grits_opengl_project(GritsViewer *_opengl,
523 gdouble lat, gdouble lon, gdouble elev,
524 gdouble *px, gdouble *py, gdouble *pz)
526 GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
528 lle2xyz(lat, lon, elev, &x, &y, &z);
530 opengl->sphere->view->model,
531 opengl->sphere->view->proj,
532 opengl->sphere->view->view,
536 static void grits_opengl_unproject(GritsViewer *_opengl,
537 gdouble px, gdouble py, gdouble pz,
538 gdouble *lat, gdouble *lon, gdouble *elev)
540 GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
541 if (!opengl->sphere->view)
546 glReadPixels(px, py, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &tmp);
549 gluUnProject(px, py, pz,
550 opengl->sphere->view->model,
551 opengl->sphere->view->proj,
552 opengl->sphere->view->view,
554 xyz2lle(x, y, z, lat, lon, elev);
555 //g_message("GritsOpenGL: unproject - "
556 // "%4.0lf,%4.0lf,(%5.3lf) -> "
557 // "%8.0lf,%8.0lf,%8.0lf -> "
558 // "%6.2lf,%7.2lf,%4.0lf",
559 // px, py, pz, x, y, z, *lat, *lon, *elev);
562 static void grits_opengl_set_height_func(GritsViewer *_opengl, GritsBounds *bounds,
563 RoamHeightFunc height_func, gpointer user_data, gboolean update)
565 GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
566 /* TODO: get points? */
567 g_mutex_lock(opengl->sphere_lock);
568 GList *triangles = roam_sphere_get_intersect(opengl->sphere, TRUE,
569 bounds->n, bounds->s, bounds->e, bounds->w);
570 for (GList *cur = triangles; cur; cur = cur->next) {
571 RoamTriangle *tri = cur->data;
572 RoamPoint *points[] = {tri->p.l, tri->p.m, tri->p.r, tri->split};
573 for (int i = 0; i < G_N_ELEMENTS(points); i++) {
574 if (bounds->n >= points[i]->lat && points[i]->lat >= bounds->s &&
575 bounds->e >= points[i]->lon && points[i]->lon >= bounds->w) {
576 points[i]->height_func = height_func;
577 points[i]->height_data = user_data;
578 roam_point_update_height(points[i]);
582 g_list_free(triangles);
583 g_mutex_unlock(opengl->sphere_lock);
586 static void _grits_opengl_clear_height_func_rec(RoamTriangle *root)
590 RoamPoint *points[] = {root->p.l, root->p.m, root->p.r, root->split};
591 for (int i = 0; i < G_N_ELEMENTS(points); i++) {
592 points[i]->height_func = NULL;
593 points[i]->height_data = NULL;
594 roam_point_update_height(points[i]);
596 _grits_opengl_clear_height_func_rec(root->kids[0]);
597 _grits_opengl_clear_height_func_rec(root->kids[1]);
600 static void grits_opengl_clear_height_func(GritsViewer *_opengl)
602 GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
603 for (int i = 0; i < G_N_ELEMENTS(opengl->sphere->roots); i++)
604 _grits_opengl_clear_height_func_rec(opengl->sphere->roots[i]);
607 static gpointer grits_opengl_add(GritsViewer *_opengl, GritsObject *object,
608 gint key, gboolean sort)
610 g_assert(GRITS_IS_OPENGL(_opengl));
611 GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
612 g_mutex_lock(opengl->objects_lock);
613 struct RenderLevel *level = g_tree_lookup(opengl->objects, (gpointer)(gintptr)key);
615 level = g_new0(struct RenderLevel, 1);
616 g_tree_insert(opengl->objects, (gpointer)(gintptr)key, level);
618 GList *list = sort ? &level->sorted : &level->unsorted;
619 /* Put the link in the list */
620 GList *link = g_new0(GList, 1);
623 link->next = list->next;
625 list->next->prev = link;
627 g_mutex_unlock(opengl->objects_lock);
631 static GritsObject *grits_opengl_remove(GritsViewer *_opengl, GritsObject *object)
633 g_assert(GRITS_IS_OPENGL(_opengl));
634 GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
635 GList *link = object->ref;
636 g_mutex_lock(opengl->objects_lock);
637 /* Just unlink and free it, link->prev is assured */
638 link->prev->next = link->next;
640 link->next->prev = link->prev;
641 g_mutex_unlock(opengl->objects_lock);
643 object->viewer = NULL;
645 g_object_unref(object);
652 static int _objects_cmp(gconstpointer _a, gconstpointer _b, gpointer _)
654 gintptr a = (gintptr)_a, b = (gintptr)_b;
658 static void _objects_free(gpointer value)
660 struct RenderLevel *level = value;
661 if (level->sorted.next)
662 g_list_free(level->sorted.next);
663 if (level->unsorted.next)
664 g_list_free(level->unsorted.next);
668 G_DEFINE_TYPE(GritsOpenGL, grits_opengl, GRITS_TYPE_VIEWER);
669 static void grits_opengl_init(GritsOpenGL *opengl)
671 g_debug("GritsOpenGL: init");
672 opengl->objects = g_tree_new_full(_objects_cmp, NULL, NULL, _objects_free);
673 opengl->objects_lock = g_mutex_new();
674 opengl->sphere = roam_sphere_new(opengl);
675 opengl->sphere_lock = g_mutex_new();
676 gtk_gl_enable(GTK_WIDGET(opengl));
677 gtk_widget_add_events(GTK_WIDGET(opengl), GDK_KEY_PRESS_MASK);
678 g_signal_connect(opengl, "map", G_CALLBACK(on_realize), NULL);
680 static void grits_opengl_dispose(GObject *_opengl)
682 g_debug("GritsOpenGL: dispose");
683 GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
684 if (opengl->sm_source[0]) {
685 g_source_remove(opengl->sm_source[0]);
686 opengl->sm_source[0] = 0;
688 if (opengl->sm_source[1]) {
689 g_source_remove(opengl->sm_source[1]);
690 opengl->sm_source[1] = 0;
692 if (opengl->ue_source) {
693 g_source_remove(opengl->ue_source);
694 opengl->ue_source = 0;
696 G_OBJECT_CLASS(grits_opengl_parent_class)->dispose(_opengl);
698 static void grits_opengl_finalize(GObject *_opengl)
700 g_debug("GritsOpenGL: finalize");
701 GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
702 roam_sphere_free(opengl->sphere);
703 g_tree_destroy(opengl->objects);
704 g_mutex_free(opengl->objects_lock);
705 g_mutex_free(opengl->sphere_lock);
706 G_OBJECT_CLASS(grits_opengl_parent_class)->finalize(_opengl);
708 static void grits_opengl_class_init(GritsOpenGLClass *klass)
710 g_debug("GritsOpenGL: class_init");
711 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
712 gobject_class->finalize = grits_opengl_finalize;
713 gobject_class->dispose = grits_opengl_dispose;
715 GritsViewerClass *viewer_class = GRITS_VIEWER_CLASS(klass);
716 viewer_class->center_position = grits_opengl_center_position;
717 viewer_class->project = grits_opengl_project;
718 viewer_class->unproject = grits_opengl_unproject;
719 viewer_class->clear_height_func = grits_opengl_clear_height_func;
720 viewer_class->set_height_func = grits_opengl_set_height_func;
721 viewer_class->add = grits_opengl_add;
722 viewer_class->remove = grits_opengl_remove;