2 * Copyright (C) 2009-2010 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/>.
18 /* Tessellation, "finding intersecting triangles" */
19 /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
20 /* http://www.opengl.org/wiki/Alpha_Blending */
25 #include <gdk/gdkkeysyms.h>
27 #include <gtk/gtkgl.h>
31 #include "gis-opengl.h"
35 #include "objects/gis-object.h"
36 #include "objects/gis-marker.h"
37 #include "objects/gis-callback.h"
39 #define FOV_DIST 2000.0
40 #define MPPX(dist) (4*dist/FOV_DIST)
47 static void _set_visuals(GisOpenGL *self)
49 glMatrixMode(GL_MODELVIEW);
53 double lat, lon, elev, rx, ry, rz;
54 gis_viewer_get_location(GIS_VIEWER(self), &lat, &lon, &elev);
55 gis_viewer_get_rotation(GIS_VIEWER(self), &rx, &ry, &rz);
56 glRotatef(rx, 1, 0, 0);
57 glRotatef(rz, 0, 0, 1);
61 float light_ambient[] = {0.7f, 0.7f, 0.7f, 1.0f};
62 float light_diffuse[] = {2.0f, 2.0f, 2.0f, 1.0f};
64 float light_ambient[] = {0.2f, 0.2f, 0.2f, 1.0f};
65 float light_diffuse[] = {5.0f, 5.0f, 5.0f, 1.0f};
67 float light_position[] = {-13*EARTH_R, 1*EARTH_R, 3*EARTH_R, 1.0f};
68 glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
69 glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
70 glLightfv(GL_LIGHT0, GL_POSITION, light_position);
72 glEnable(GL_LIGHTING);
74 float material_ambient[] = {0.2, 0.2, 0.2, 1.0};
75 float material_diffuse[] = {0.8, 0.8, 0.8, 1.0};
76 float material_specular[] = {0.1, 0.1, 0.1, 1.0};
77 float material_emission[] = {0.0, 0.0, 0.0, 1.0};
78 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, material_ambient);
79 glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, material_diffuse);
80 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, material_specular);
81 glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, material_emission);
82 glDisable(GL_TEXTURE_2D);
83 glDisable(GL_COLOR_MATERIAL);
86 glTranslatef(0, 0, -elev2rad(elev));
87 glRotatef(lat, 1, 0, 0);
88 glRotatef(-lon, 0, 1, 0);
90 glDisable(GL_ALPHA_TEST);
92 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
97 glEnable(GL_CULL_FACE);
101 glDepthFunc(GL_LEQUAL);
102 glEnable(GL_DEPTH_TEST);
104 glEnable(GL_LINE_SMOOTH);
106 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
107 //glShadeModel(GL_FLAT);
109 roam_sphere_update_view(self->sphere);
113 /********************
115 ********************/
116 static void _draw_tile(GisOpenGL *self, GisTile *tile)
118 if (!tile || !tile->data)
120 GList *triangles = roam_sphere_get_intersect(self->sphere, FALSE,
121 tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
123 g_warning("GisOpenGL: _draw_tiles - No triangles to draw: edges=%f,%f,%f,%f",
124 tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
125 //g_message("drawing %4d triangles for tile edges=%7.2f,%7.2f,%7.2f,%7.2f",
126 // g_list_length(triangles), tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
127 for (GList *cur = triangles; cur; cur = cur->next) {
128 RoamTriangle *tri = cur->data;
130 gdouble lat[3] = {tri->p.r->lat, tri->p.m->lat, tri->p.l->lat};
131 gdouble lon[3] = {tri->p.r->lon, tri->p.m->lon, tri->p.l->lon};
133 if (lon[0] < -90 || lon[1] < -90 || lon[2] < -90) {
134 if (lon[0] > 90) lon[0] -= 360;
135 if (lon[1] > 90) lon[1] -= 360;
136 if (lon[2] > 90) lon[2] -= 360;
139 gdouble n = tile->edge.n;
140 gdouble s = tile->edge.s;
141 gdouble e = tile->edge.e;
142 gdouble w = tile->edge.w;
144 gdouble londist = e - w;
145 gdouble latdist = n - s;
148 {(lon[0]-w)/londist, 1-(lat[0]-s)/latdist},
149 {(lon[1]-w)/londist, 1-(lat[1]-s)/latdist},
150 {(lon[2]-w)/londist, 1-(lat[2]-s)/latdist},
153 //if ((lat[0] == 90 && (xy[0][0] < 0 || xy[0][0] > 1)) ||
154 // (lat[1] == 90 && (xy[1][0] < 0 || xy[1][0] > 1)) ||
155 // (lat[2] == 90 && (xy[2][0] < 0 || xy[2][0] > 1)))
156 // g_message("w,e=%4.f,%4.f "
158 // "%4.1f,%4.0f,%4.2f,%4.2f "
159 // "%4.1f,%4.0f,%4.2f,%4.2f "
160 // "%4.1f,%4.0f,%4.2f,%4.2f ",
162 // lat[0], lon[0], xy[0][0], xy[0][1],
163 // lat[1], lon[1], xy[1][0], xy[1][1],
164 // lat[2], lon[2], xy[2][0], xy[2][1]);
167 if (lat[0] == 90 || lat[0] == -90) xy[0][0] = 0.5;
168 if (lat[1] == 90 || lat[1] == -90) xy[1][0] = 0.5;
169 if (lat[2] == 90 || lat[2] == -90) xy[2][0] = 0.5;
171 glEnable(GL_TEXTURE_2D);
172 glBindTexture(GL_TEXTURE_2D, *(guint*)tile->data);
173 glBegin(GL_TRIANGLES);
174 glNormal3dv(tri->p.r->norm); glTexCoord2dv(xy[0]); glVertex3dv((double*)tri->p.r);
175 glNormal3dv(tri->p.m->norm); glTexCoord2dv(xy[1]); glVertex3dv((double*)tri->p.m);
176 glNormal3dv(tri->p.l->norm); glTexCoord2dv(xy[2]); glVertex3dv((double*)tri->p.l);
179 g_list_free(triangles);
182 static void _draw_tiles(GisOpenGL *self, GisTile *tile)
184 /* Only draw children if possible */
185 gboolean has_children = TRUE;
187 gis_tile_foreach(tile, child)
188 if (!child || !child->data)
189 has_children = FALSE;
191 /* Only draw children */
192 gis_tile_foreach(tile, child)
193 _draw_tiles(self, child);
195 /* No children, draw this tile */
196 _draw_tile(self, tile);
199 static void _draw_marker(GisOpenGL *self, GisMarker *marker)
201 GisPoint *point = gis_object_center(GIS_OBJECT(marker));
203 gis_viewer_project(GIS_VIEWER(self),
204 point->lat, point->lon, point->elev,
209 //g_debug("GisOpenGL: draw_marker - %s pz=%f ", marker->label, pz);
211 cairo_surface_t *surface = cairo_get_target(marker->cairo);
212 gdouble width = cairo_image_surface_get_width(surface);
213 gdouble height = cairo_image_surface_get_height(surface);
215 glMatrixMode(GL_PROJECTION); glLoadIdentity();
216 glMatrixMode(GL_MODELVIEW); glLoadIdentity();
217 glOrtho(0, GTK_WIDGET(self)->allocation.width,
218 0, GTK_WIDGET(self)->allocation.height, -1, 1);
219 glTranslated(px - marker->xoff,
220 py - marker->yoff, 0);
222 glDisable(GL_LIGHTING);
223 glDisable(GL_COLOR_MATERIAL);
224 glDisable(GL_DEPTH_TEST);
225 glEnable(GL_TEXTURE_2D);
226 glBindTexture(GL_TEXTURE_2D, marker->tex);
228 glTexCoord2f(1, 1); glVertex3f(width, 0 , 0);
229 glTexCoord2f(1, 0); glVertex3f(width, height, 0);
230 glTexCoord2f(0, 0); glVertex3f(0 , height, 0);
231 glTexCoord2f(0, 1); glVertex3f(0 , 0 , 0);
235 static void _draw_callback(GisOpenGL *self, GisCallback *callback)
237 callback->callback(callback, callback->user_data);
240 static void _draw_object(GisOpenGL *self, GisObject *object)
242 //g_debug("GisOpenGL: draw_object");
243 /* Skip out of range objects */
244 if (object->lod > 0) {
245 gdouble eye[3], obj[3];
246 gis_viewer_get_location(GIS_VIEWER(self), &eye[0], &eye[1], &eye[2]);
247 lle2xyz(eye[0], eye[1], eye[2], &eye[0], &eye[1], &eye[2]);
248 lle2xyz(object->center.lat, object->center.lon, object->center.elev,
249 &obj[0], &obj[1], &obj[2]);
250 gdouble dist = distd(obj, eye);
251 if (object->lod < dist)
256 glMatrixMode(GL_PROJECTION); glPushMatrix();
257 glMatrixMode(GL_MODELVIEW); glPushMatrix();
258 glPushAttrib(GL_ALL_ATTRIB_BITS);
259 if (GIS_IS_MARKER(object)) {
260 _draw_marker(self, GIS_MARKER(object));
261 } else if (GIS_IS_CALLBACK(object)) {
262 _draw_callback(self, GIS_CALLBACK(object));
263 } else if (GIS_IS_TILE(object)) {
264 _draw_tiles(self, GIS_TILE(object));
267 glMatrixMode(GL_PROJECTION); glPopMatrix();
268 glMatrixMode(GL_MODELVIEW); glPopMatrix();
271 static void _load_object(GisOpenGL *self, GisObject *object)
273 g_debug("GisOpenGL: load_object");
274 if (GIS_IS_MARKER(object)) {
275 GisMarker *marker = GIS_MARKER(object);
276 cairo_surface_t *surface = cairo_get_target(marker->cairo);
277 gdouble width = cairo_image_surface_get_width(surface);
278 gdouble height = cairo_image_surface_get_height(surface);
280 glEnable(GL_TEXTURE_2D);
281 glGenTextures(1, &marker->tex);
282 glBindTexture(GL_TEXTURE_2D, marker->tex);
284 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
285 glPixelStorei(GL_PACK_ALIGNMENT, 1);
286 glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
287 cairo_image_surface_get_data(surface));
288 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
289 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
290 g_debug("load_texture: %d", marker->tex);
294 static void _unload_object(GisOpenGL *self, GisObject *object)
296 g_debug("GisOpenGL: unload_object");
297 if (GIS_IS_MARKER(object)) {
298 GisMarker *marker = GIS_MARKER(object);
299 glDeleteTextures(1, &marker->tex);
307 /* The unsorted/sroted GLists are blank head nodes,
308 * This way us we can remove objects from the level just by fixing up links
309 * I.e. we don't need to do a lookup to remove an object if we have its GList */
315 static void on_realize(GisOpenGL *self, gpointer _)
317 g_debug("GisOpenGL: on_realize");
319 GdkGLContext *glcontext = gtk_widget_get_gl_context(GTK_WIDGET(self));
320 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(self));
321 if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
322 g_assert_not_reached();
325 g_mutex_lock(self->sphere_lock);
326 roam_sphere_update_errors(self->sphere);
327 g_mutex_unlock(self->sphere_lock);
330 static gboolean on_configure(GisOpenGL *self, GdkEventConfigure *event, gpointer _)
332 g_debug("GisOpenGL: on_configure");
334 double width = GTK_WIDGET(self)->allocation.width;
335 double height = GTK_WIDGET(self)->allocation.height;
337 /* Setup OpenGL Window */
338 glViewport(0, 0, width, height);
339 glMatrixMode(GL_PROJECTION);
341 double ang = atan(height/FOV_DIST);
342 gluPerspective(rad2deg(ang)*2, width/height, 1, 10*EARTH_R);
345 g_mutex_lock(self->sphere_lock);
346 roam_sphere_update_errors(self->sphere);
347 g_mutex_unlock(self->sphere_lock);
353 static gboolean _draw_level(gpointer key, gpointer value, gpointer user_data)
355 g_debug("GisOpenGL: _draw_level - level=%-4d", (int)key);
356 GisOpenGL *self = user_data;
357 struct RenderLevel *level = value;
358 int nsorted = 0, nunsorted = 0;
361 /* Draw opaque objects without sorting */
363 glClear(GL_DEPTH_BUFFER_BIT);
364 for (cur = level->unsorted.next; cur; cur = cur->next, nunsorted++)
365 _draw_object(self, GIS_OBJECT(cur->data));
367 /* Freeze depth buffer and draw transparent objects sorted */
369 //glDepthMask(FALSE);
370 glAlphaFunc(GL_GREATER, 0.1);
371 for (cur = level->sorted.next; cur; cur = cur->next, nsorted++)
372 _draw_object(self, GIS_OBJECT(cur->data));
374 /* TODO: Prune empty levels */
376 g_debug("GisOpenGL: _draw_level - drew %d,%d objects",
381 static gboolean on_expose(GisOpenGL *self, GdkEventExpose *event, gpointer _)
383 g_debug("GisOpenGL: on_expose - begin");
385 glClear(GL_COLOR_BUFFER_BIT);
389 glColor4f(0.0, 0.0, 9.0, 0.6);
390 glDisable(GL_TEXTURE_2D);
391 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
392 roam_sphere_draw(self->sphere);
393 //roam_sphere_draw_normals(self->sphere);
395 g_tree_foreach(self->objects, _draw_level, self);
396 if (self->wireframe) {
397 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
398 roam_sphere_draw(self->sphere);
402 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(self));
403 gdk_gl_drawable_swap_buffers(gldrawable);
405 g_debug("GisOpenGL: on_expose - end\n");
409 static gboolean on_key_press(GisOpenGL *self, GdkEventKey *event, gpointer _)
411 g_debug("GisOpenGL: on_key_press - key=%x, state=%x, plus=%x",
412 event->keyval, event->state, GDK_plus);
414 guint kv = event->keyval;
418 self->wireframe = !self->wireframe;
419 gtk_widget_queue_draw(GTK_WIDGET(self));
422 else if (kv == GDK_n) roam_sphere_split_one(self->sphere);
423 else if (kv == GDK_p) roam_sphere_merge_one(self->sphere);
424 else if (kv == GDK_r) roam_sphere_split_merge(self->sphere);
425 else if (kv == GDK_u) roam_sphere_update_errors(self->sphere);
427 gtk_widget_queue_draw(GTK_WIDGET(self));
434 static gboolean _update_errors_cb(gpointer sphere)
436 roam_sphere_update_errors(sphere);
439 static void on_view_changed(GisOpenGL *self,
440 gdouble _1, gdouble _2, gdouble _3)
442 g_debug("GisOpenGL: on_view_changed");
446 self->ue_source = g_idle_add_full(G_PRIORITY_HIGH_IDLE+30,
447 _update_errors_cb, self->sphere, NULL);
448 //roam_sphere_update_errors(self->sphere);
453 static gboolean on_idle(GisOpenGL *self)
455 //g_debug("GisOpenGL: on_idle");
457 g_mutex_lock(self->sphere_lock);
458 if (roam_sphere_split_merge(self->sphere))
459 gtk_widget_queue_draw(GTK_WIDGET(self));
460 g_mutex_unlock(self->sphere_lock);
466 /*********************
467 * GisViewer methods *
468 *********************/
469 GisViewer *gis_opengl_new(GisPlugins *plugins, GisPrefs *prefs)
471 g_debug("GisOpenGL: new");
472 GisViewer *self = g_object_new(GIS_TYPE_OPENGL, NULL);
473 gis_viewer_setup(self, plugins, prefs);
477 static void gis_opengl_center_position(GisViewer *_self, gdouble lat, gdouble lon, gdouble elev)
479 GisOpenGL *self = GIS_OPENGL(_self);
480 glRotatef(lon, 0, 1, 0);
481 glRotatef(-lat, 1, 0, 0);
482 glTranslatef(0, 0, elev2rad(elev));
485 static void gis_opengl_project(GisViewer *_self,
486 gdouble lat, gdouble lon, gdouble elev,
487 gdouble *px, gdouble *py, gdouble *pz)
489 GisOpenGL *self = GIS_OPENGL(_self);
491 lle2xyz(lat, lon, elev, &x, &y, &z);
493 self->sphere->view->model,
494 self->sphere->view->proj,
495 self->sphere->view->view,
499 static void gis_opengl_set_height_func(GisViewer *_self, GisTile *tile,
500 RoamHeightFunc height_func, gpointer user_data, gboolean update)
502 GisOpenGL *self = GIS_OPENGL(_self);
505 /* TODO: get points? */
506 g_mutex_lock(self->sphere_lock);
507 GList *triangles = roam_sphere_get_intersect(self->sphere, TRUE,
508 tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
509 for (GList *cur = triangles; cur; cur = cur->next) {
510 RoamTriangle *tri = cur->data;
511 RoamPoint *points[] = {tri->p.l, tri->p.m, tri->p.r, tri->split};
512 for (int i = 0; i < G_N_ELEMENTS(points); i++) {
513 if (tile->edge.n >= points[i]->lat && points[i]->lat >= tile->edge.s &&
514 tile->edge.e >= points[i]->lon && points[i]->lon >= tile->edge.w) {
515 points[i]->height_func = height_func;
516 points[i]->height_data = user_data;
517 roam_point_update_height(points[i]);
521 g_list_free(triangles);
522 g_mutex_unlock(self->sphere_lock);
525 static void _gis_opengl_clear_height_func_rec(RoamTriangle *root)
529 RoamPoint *points[] = {root->p.l, root->p.m, root->p.r, root->split};
530 for (int i = 0; i < G_N_ELEMENTS(points); i++) {
531 points[i]->height_func = NULL;
532 points[i]->height_data = NULL;
533 roam_point_update_height(points[i]);
535 _gis_opengl_clear_height_func_rec(root->kids[0]);
536 _gis_opengl_clear_height_func_rec(root->kids[1]);
539 static void gis_opengl_clear_height_func(GisViewer *_self)
541 GisOpenGL *self = GIS_OPENGL(_self);
542 for (int i = 0; i < G_N_ELEMENTS(self->sphere->roots); i++)
543 _gis_opengl_clear_height_func_rec(self->sphere->roots[i]);
546 static gpointer gis_opengl_add(GisViewer *_self, GisObject *object,
547 gint key, gboolean sort)
549 g_assert(GIS_IS_OPENGL(_self));
550 GisOpenGL *self = GIS_OPENGL(_self);
551 _load_object(self, object);
552 struct RenderLevel *level = g_tree_lookup(self->objects, (gpointer)key);
554 level = g_new0(struct RenderLevel, 1);
555 g_tree_insert(self->objects, (gpointer)key, level);
557 GList *list = sort ? &level->sorted : &level->unsorted;
558 /* Put the link in the list */
559 GList *next = g_new0(GList, 1);
562 next->next = list->next;
567 static GisObject *gis_opengl_remove(GisViewer *_self, gpointer _link)
569 g_assert(GIS_IS_OPENGL(_self));
570 GisOpenGL *self = GIS_OPENGL(_self);
572 GisObject *object = link->data;
573 _unload_object(self, object);
574 /* Just unlink and free it, link->prev is assured */
575 link->prev->next = link->next;
577 link->next->prev = link->prev;
579 g_object_unref(object);
586 static int _objects_cmp(gconstpointer _a, gconstpointer _b, gpointer _)
588 gint a = (int)_a, b = (int)_b;
592 static void _objects_free(gpointer value)
594 struct RenderLevel *level = value;
595 if (level->sorted.next)
596 g_list_free(level->sorted.next);
597 if (level->unsorted.next)
598 g_list_free(level->unsorted.next);
602 G_DEFINE_TYPE(GisOpenGL, gis_opengl, GIS_TYPE_VIEWER);
603 static void gis_opengl_init(GisOpenGL *self)
605 g_debug("GisOpenGL: init");
607 GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
608 GDK_GL_MODE_RGBA | GDK_GL_MODE_DEPTH |
609 GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
611 g_error("Failed to create glconfig");
612 if (!gtk_widget_set_gl_capability(GTK_WIDGET(self),
613 glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
614 g_error("GL lacks required capabilities");
615 g_object_unref(glconfig);
617 gtk_widget_set_size_request(GTK_WIDGET(self), 600, 550);
618 gtk_widget_set_events(GTK_WIDGET(self),
619 GDK_BUTTON_PRESS_MASK |
620 GDK_ENTER_NOTIFY_MASK |
622 g_object_set(self, "can-focus", TRUE, NULL);
624 self->objects = g_tree_new_full(_objects_cmp, NULL, NULL, _objects_free);
625 self->sphere = roam_sphere_new(self);
626 self->sphere_lock = g_mutex_new();
629 self->sm_source[0] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+30, 33, (GSourceFunc)on_idle, self, NULL);
630 self->sm_source[1] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+10, 500, (GSourceFunc)on_idle, self, NULL);
633 g_signal_connect(self, "realize", G_CALLBACK(on_realize), NULL);
634 g_signal_connect(self, "configure-event", G_CALLBACK(on_configure), NULL);
635 g_signal_connect(self, "expose-event", G_CALLBACK(on_expose), NULL);
637 g_signal_connect(self, "key-press-event", G_CALLBACK(on_key_press), NULL);
639 g_signal_connect(self, "location-changed", G_CALLBACK(on_view_changed), NULL);
640 g_signal_connect(self, "rotation-changed", G_CALLBACK(on_view_changed), NULL);
642 static void gis_opengl_dispose(GObject *_self)
644 g_debug("GisOpenGL: dispose");
645 GisOpenGL *self = GIS_OPENGL(_self);
646 if (self->sm_source[0]) {
647 g_source_remove(self->sm_source[0]);
648 self->sm_source[0] = 0;
650 if (self->sm_source[1]) {
651 g_source_remove(self->sm_source[1]);
652 self->sm_source[1] = 0;
654 if (self->ue_source) {
655 g_source_remove(self->ue_source);
658 G_OBJECT_CLASS(gis_opengl_parent_class)->dispose(_self);
660 static void gis_opengl_finalize(GObject *_self)
662 g_debug("GisOpenGL: finalize");
663 GisOpenGL *self = GIS_OPENGL(_self);
664 roam_sphere_free(self->sphere);
665 g_tree_destroy(self->objects);
666 g_mutex_free(self->sphere_lock);
667 G_OBJECT_CLASS(gis_opengl_parent_class)->finalize(_self);
669 static void gis_opengl_class_init(GisOpenGLClass *klass)
671 g_debug("GisOpenGL: class_init");
672 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
673 gobject_class->finalize = gis_opengl_finalize;
674 gobject_class->dispose = gis_opengl_dispose;
676 GisViewerClass *viewer_class = GIS_VIEWER_CLASS(klass);
677 viewer_class->center_position = gis_opengl_center_position;
678 viewer_class->project = gis_opengl_project;
679 viewer_class->clear_height_func = gis_opengl_clear_height_func;
680 viewer_class->set_height_func = gis_opengl_set_height_func;
681 viewer_class->add = gis_opengl_add;
682 viewer_class->remove = gis_opengl_remove;