+/*
+ * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <math.h>
+#include <gtk/gtkgl.h>
+#include <GL/gl.h>
+
+#include <gis/gis.h>
+
+#include "env.h"
+
+/***********
+ * Helpers *
+ ***********/
+static gpointer expose(GisCallback *callback, gpointer _self)
+{
+ GisPluginEnv *self = GIS_PLUGIN_ENV(_self);
+ g_debug("GisPluginEnv: expose");
+
+ gdouble lat, lon, elev;
+ gis_viewer_get_location(self->viewer, &lat, &lon, &elev);
+
+ /* Misc */
+ gdouble rg = MAX(0, 1-(elev/20000));
+ gdouble blue = MAX(0, 1-(elev/50000));
+ glClearColor(MIN(0.65,rg), MIN(0.65,rg), MIN(1,blue), 1.0f);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ /* Attempt to render an atmosphere */
+ /*
+ glEnable(GL_COLOR_MATERIAL);
+ glDisable(GL_CULL_FACE);
+ glDisable(GL_LIGHTING);
+
+ glBlendFunc(GL_ONE, GL_ONE);
+
+ glMatrixMode(GL_MODELVIEW);
+
+ elev = -EARTH_R;
+ for (elev = -EARTH_R; elev < 0; elev += EARTH_R/10) {
+ glPushMatrix();
+ glColor4f(0.3, 0.3, 1.0, 0.2);
+ gis_viewer_center_position(self->viewer, lat, lon, elev);
+
+ glBegin(GL_TRIANGLE_FAN);
+ glVertex3f(0, 0, 0);
+ for (gdouble i = 0; i <= 2*G_PI; i += G_PI/10) {
+ gint rad = 1*EARTH_R + 300000;
+ glVertex3f(rad*sin(i), rad*cos(i), 0);
+ g_message("%f %f %f", 3*EARTH_R*sin(i), 3*EARTH_R*cos(i), 0.);
+ }
+ glEnd();
+ glPopMatrix();
+ }
+ */
+
+ return NULL;
+}
+
+
+/***********
+ * Methods *
+ ***********/
+GisPluginEnv *gis_plugin_env_new(GisViewer *viewer, GisPrefs *prefs)
+{
+ g_debug("GisPluginEnv: new");
+ GisPluginEnv *self = g_object_new(GIS_TYPE_PLUGIN_ENV, NULL);
+ self->viewer = viewer;
+
+ /* Add renderers */
+ GisCallback *callback = gis_callback_new(expose, self);
+ gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_BACKGROUND, 0);
+
+ return self;
+}
+
+
+/****************
+ * GObject code *
+ ****************/
+/* Plugin init */
+static void gis_plugin_env_plugin_init(GisPluginInterface *iface);
+G_DEFINE_TYPE_WITH_CODE(GisPluginEnv, gis_plugin_env, G_TYPE_OBJECT,
+ G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
+ gis_plugin_env_plugin_init));
+static void gis_plugin_env_plugin_init(GisPluginInterface *iface)
+{
+ g_debug("GisPluginEnv: plugin_init");
+ /* Add methods to the interface */
+}
+/* Class/Object init */
+static void gis_plugin_env_init(GisPluginEnv *self)
+{
+ g_debug("GisPluginEnv: init");
+ /* Set defaults */
+}
+static void gis_plugin_env_dispose(GObject *gobject)
+{
+ g_debug("GisPluginEnv: dispose");
+ GisPluginEnv *self = GIS_PLUGIN_ENV(gobject);
+ /* Drop references */
+ G_OBJECT_CLASS(gis_plugin_env_parent_class)->dispose(gobject);
+}
+static void gis_plugin_env_class_init(GisPluginEnvClass *klass)
+{
+ g_debug("GisPluginEnv: class_init");
+ GObjectClass *gobject_class = (GObjectClass*)klass;
+ gobject_class->dispose = gis_plugin_env_dispose;
+}