X-Git-Url: http://pileus.org/git/?p=grits;a=blobdiff_plain;f=src%2Fplugins%2Fenv.c;h=129e759ea8d39b4ea4a4126a2adde2c5e3a7397f;hp=7deea1fee3e08db85bb36a5d2d23b1cade99e42c;hb=d8948985b467a5cfd0447ae413ed1c5d01afb024;hpb=b92087ed5280da4c84ea927a73a8d7bb461e7d47 diff --git a/src/plugins/env.c b/src/plugins/env.c index 7deea1f..129e759 100644 --- a/src/plugins/env.c +++ b/src/plugins/env.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2009 Andy Spencer + * Copyright (C) 2009-2010 Andy Spencer * * 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 @@ -15,77 +15,101 @@ * along with this program. If not, see . */ +/** + * SECTION:env + * @short_description: Environment plugin + * + * #GisPluginEnv provides environmental information such as sky images. It can + * also paint a blank overlay on the surface so that other plugins can draw + * transparent overlays nicely. + */ + #include #include #include -#include +#include #include "env.h" /*********** * Helpers * ***********/ -static gpointer expose(GisCallback *callback, gpointer _self) +static void expose(GisCallback *callback, GisOpenGL *opengl, gpointer _env) { - GisPluginEnv *self = GIS_PLUGIN_ENV(_self); + GisPluginEnv *env = GIS_PLUGIN_ENV(_env); g_debug("GisPluginEnv: expose"); gdouble lat, lon, elev; - gis_viewer_get_location(self->viewer, &lat, &lon, &elev); + gis_viewer_get_location(env->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); + gdouble rg = MAX(0, 1-(elev/40000)); + gdouble blue = MAX(0, 1-(elev/100000)); + glClearColor(MIN(0.4,rg), MIN(0.4,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); + glMatrixMode(GL_MODELVIEW); + glBlendFunc(GL_SRC_ALPHA, GL_DST_ALPHA); + gis_viewer_center_position(env->viewer, lat, lon, -EARTH_R); - glBlendFunc(GL_ONE, GL_ONE); + gdouble ds = EARTH_R+elev; // distance to self + gdouble da = EARTH_R+300000; // distance to top of atmosphere + gdouble dg = EARTH_R-100000; // distance to top of atmosphere + gdouble ang = acos(EARTH_R/ds); // angle to horizon + ang = MAX(ang,0.1); - glMatrixMode(GL_MODELVIEW); + gdouble ar = sin(ang)*da; // top of quad fan "atomosphere"j + gdouble az = cos(ang)*da; // - 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(); - } - */ + gdouble gr = sin(ang)*dg; // bottom of quad fan "ground" + gdouble gz = cos(ang)*dg; // - return NULL; + glBegin(GL_QUAD_STRIP); + for (gdouble i = 0; i <= 2*G_PI; i += G_PI/30) { + glColor4f(0.3, 0.3, 1.0, 1.0); glVertex3f(gr*sin(i), gr*cos(i), gz); + glColor4f(0.3, 0.3, 1.0, 0.0); glVertex3f(ar*sin(i), ar*cos(i), az); + } + glEnd(); } /*********** * Methods * ***********/ +/** + * gis_plugin_env_new: + * @viewer: the #GisViewer to use for drawing + * @prefs: the #GisPrefs for storing configurations + * + * Create a new instance of the environment plugin. + * + * Returns: the new #GisPluginEnv + */ 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; + GisPluginEnv *env = g_object_new(GIS_TYPE_PLUGIN_ENV, NULL); + env->viewer = g_object_ref(viewer); + + /* Create objects */ + GisCallback *callback = gis_callback_new(expose, env); + GisTile *background = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST); + glGenTextures(1, &env->tex); + background->data = &env->tex; /* Add renderers */ - GisCallback *callback = gis_callback_new(expose, self); - gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_BACKGROUND, 0); + gpointer ref1, ref2; + ref1 = gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_BACKGROUND, FALSE); + ref2 = gis_viewer_add(viewer, GIS_OBJECT(background), GIS_LEVEL_BACKGROUND, FALSE); + env->refs = g_list_prepend(env->refs, ref1); + env->refs = g_list_prepend(env->refs, ref2); - return self; + return env; } @@ -103,7 +127,7 @@ static void gis_plugin_env_plugin_init(GisPluginInterface *iface) /* Add methods to the interface */ } /* Class/Object init */ -static void gis_plugin_env_init(GisPluginEnv *self) +static void gis_plugin_env_init(GisPluginEnv *env) { g_debug("GisPluginEnv: init"); /* Set defaults */ @@ -111,13 +135,21 @@ static void gis_plugin_env_init(GisPluginEnv *self) static void gis_plugin_env_dispose(GObject *gobject) { g_debug("GisPluginEnv: dispose"); - GisPluginEnv *self = GIS_PLUGIN_ENV(gobject); + GisPluginEnv *env = GIS_PLUGIN_ENV(gobject); /* Drop references */ + if (env->viewer) { + for (GList *cur = env->refs; cur; cur = cur->next) + gis_viewer_remove(env->viewer, cur->data); + g_list_free(env->refs); + g_object_unref(env->viewer); + glDeleteTextures(1, &env->tex); + env->viewer = NULL; + } 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; + gobject_class->dispose = gis_plugin_env_dispose; }