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/>.
19 #include <gtk/gtkgl.h>
29 static void expose(GisCallback *callback, gpointer _env)
31 GisPluginEnv *env = GIS_PLUGIN_ENV(_env);
32 g_debug("GisPluginEnv: expose");
34 gdouble lat, lon, elev;
35 gis_viewer_get_location(env->viewer, &lat, &lon, &elev);
38 gdouble rg = MAX(0, 1-(elev/20000));
39 gdouble blue = MAX(0, 1-(elev/50000));
40 glClearColor(MIN(0.65,rg), MIN(0.65,rg), MIN(1,blue), 1.0f);
41 glClear(GL_COLOR_BUFFER_BIT);
43 /* Attempt to render an atmosphere */
45 glEnable(GL_COLOR_MATERIAL);
46 glDisable(GL_CULL_FACE);
47 glDisable(GL_LIGHTING);
49 glBlendFunc(GL_ONE, GL_ONE);
51 glMatrixMode(GL_MODELVIEW);
54 for (elev = -EARTH_R; elev < 0; elev += EARTH_R/10) {
56 glColor4f(0.3, 0.3, 1.0, 0.2);
57 gis_viewer_center_position(env->viewer, lat, lon, elev);
59 glBegin(GL_TRIANGLE_FAN);
61 for (gdouble i = 0; i <= 2*G_PI; i += G_PI/10) {
62 gint rad = 1*EARTH_R + 300000;
63 glVertex3f(rad*sin(i), rad*cos(i), 0);
64 g_message("%f %f %f", 3*EARTH_R*sin(i), 3*EARTH_R*cos(i), 0.);
76 GisPluginEnv *gis_plugin_env_new(GisViewer *viewer, GisPrefs *prefs)
78 g_debug("GisPluginEnv: new");
79 GisPluginEnv *env = g_object_new(GIS_TYPE_PLUGIN_ENV, NULL);
80 env->viewer = g_object_ref(viewer);
83 GisCallback *callback = gis_callback_new(expose, env);
84 GisTile *background = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
85 glGenTextures(1, &env->tex);
86 background->data = &env->tex;
90 ref1 = gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_BACKGROUND, FALSE);
91 ref2 = gis_viewer_add(viewer, GIS_OBJECT(background), GIS_LEVEL_BACKGROUND, FALSE);
92 env->refs = g_list_prepend(env->refs, ref1);
93 env->refs = g_list_prepend(env->refs, ref2);
103 static void gis_plugin_env_plugin_init(GisPluginInterface *iface);
104 G_DEFINE_TYPE_WITH_CODE(GisPluginEnv, gis_plugin_env, G_TYPE_OBJECT,
105 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
106 gis_plugin_env_plugin_init));
107 static void gis_plugin_env_plugin_init(GisPluginInterface *iface)
109 g_debug("GisPluginEnv: plugin_init");
110 /* Add methods to the interface */
112 /* Class/Object init */
113 static void gis_plugin_env_init(GisPluginEnv *env)
115 g_debug("GisPluginEnv: init");
118 static void gis_plugin_env_dispose(GObject *gobject)
120 g_debug("GisPluginEnv: dispose");
121 GisPluginEnv *env = GIS_PLUGIN_ENV(gobject);
122 /* Drop references */
124 for (GList *cur = env->refs; cur; cur = cur->next)
125 gis_viewer_remove(env->viewer, cur->data);
126 g_list_free(env->refs);
127 g_object_unref(env->viewer);
128 glDeleteTextures(1, &env->tex);
131 G_OBJECT_CLASS(gis_plugin_env_parent_class)->dispose(gobject);
133 static void gis_plugin_env_class_init(GisPluginEnvClass *klass)
135 g_debug("GisPluginEnv: class_init");
136 GObjectClass *gobject_class = (GObjectClass*)klass;
137 gobject_class->dispose = gis_plugin_env_dispose;