2 * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
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 gpointer expose(GisCallback *callback, gpointer _self)
31 GisPluginEnv *self = GIS_PLUGIN_ENV(_self);
32 g_debug("GisPluginEnv: expose");
34 gdouble lat, lon, elev;
35 gis_viewer_get_location(self->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(self->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.);
78 GisPluginEnv *gis_plugin_env_new(GisViewer *viewer, GisPrefs *prefs)
80 g_debug("GisPluginEnv: new");
81 GisPluginEnv *self = g_object_new(GIS_TYPE_PLUGIN_ENV, NULL);
82 self->viewer = viewer;
85 GisCallback *callback = gis_callback_new(expose, self);
86 gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_BACKGROUND, 0);
96 static void gis_plugin_env_plugin_init(GisPluginInterface *iface);
97 G_DEFINE_TYPE_WITH_CODE(GisPluginEnv, gis_plugin_env, G_TYPE_OBJECT,
98 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
99 gis_plugin_env_plugin_init));
100 static void gis_plugin_env_plugin_init(GisPluginInterface *iface)
102 g_debug("GisPluginEnv: plugin_init");
103 /* Add methods to the interface */
105 /* Class/Object init */
106 static void gis_plugin_env_init(GisPluginEnv *self)
108 g_debug("GisPluginEnv: init");
111 static void gis_plugin_env_dispose(GObject *gobject)
113 g_debug("GisPluginEnv: dispose");
114 GisPluginEnv *self = GIS_PLUGIN_ENV(gobject);
115 /* Drop references */
116 G_OBJECT_CLASS(gis_plugin_env_parent_class)->dispose(gobject);
118 static void gis_plugin_env_class_init(GisPluginEnvClass *klass)
120 g_debug("GisPluginEnv: class_init");
121 GObjectClass *gobject_class = (GObjectClass*)klass;
122 gobject_class->dispose = gis_plugin_env_dispose;