/*
- * Copyright (C) 2009-201
0 Andy Spencer <andy753421@gmail.com>
+ * Copyright (C) 2009-201
1 Andy Spencer <andy753421@gmail.com>
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+/**
+ * SECTION:env
+ * @short_description: Environment plugin
+ *
+ * #GritsPluginEnv 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 <math.h>
-#include <gtk/gtkgl.h>
-#include <GL/gl.h>
-#include <gis/gis.h>
+#include <grits.h>
+
+#ifdef HAVE_GLUT
+#include <GL/glut.h>
+#endif
#include "env.h"
/***********
* Helpers *
***********/
-static gpointer expose(GisCallback *callback, gpointer _self)
+
+/* Sky */
+static void sky_expose(GritsCallback *sky, GritsOpenGL *opengl, gpointer _env)
{
- GisPluginEnv *self = GIS_PLUGIN_ENV(_self);
- g_debug("GisPluginEnv: expose");
+ GritsPluginEnv *env = GRITS_PLUGIN_ENV(_env);
+ g_debug("GritsPluginEnv: expose_sky");
gdouble lat, lon, elev;
- gis_viewer_get_location(self->viewer, &lat, &lon, &elev);
+ grits_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);
+ grits_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; //
+
+ gdouble gr = sin(ang)*dg; // bottom of quad fan "ground"
+ gdouble gz = cos(ang)*dg; //
+
+ 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();
+}
+
+/* Compass */
+static void compass_draw_compass(gdouble scale)
+{
+ gfloat thick = scale * 0.20;
+
+ /* Setup lighting */
+ float light_ambient[] = {0.4f, 0.4f, 0.4f, 0.4f};
+ float light_diffuse[] = {0.9f, 0.9f, 0.9f, 1.0f};
+ float light_position[] = {-scale*2, -scale*4, -scale*0.5, 1.0f};
+ glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+ glLightfv(GL_LIGHT0, GL_POSITION, light_position);
- 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.);
+ /* Compass data */
+ gdouble colors[][3] = {
+ {1, 0, 0},
+ {1, 1, 1},
+ {1, 1, 1},
+ {1, 1, 1},
+ };
+ gdouble points[][3] = {
+ { 0, -scale, 0},
+ { 0, 0, thick},
+ { thick, -thick, 0},
+ { 0, 0, -thick},
+ {-thick, -thick, 0},
+ };
+ gint faces[][3] = {
+ {1, 0, 2},
+ {2, 0, 3},
+ {3, 0, 4},
+ {4, 0, 1},
+ };
+ gint outline[] = {
+ 2, 0, 4,
+ 1, 2, 3, 4,
+ };
+
+ /* Draw compas */
+ glEnable(GL_POLYGON_OFFSET_FILL);
+ glPolygonOffset(1, 1);
+ for (int i = 0; i < G_N_ELEMENTS(colors); i++) {
+ gdouble *color = colors[i];
+ glColor3dv(color);
+ for (int j = 0; j < G_N_ELEMENTS(faces); j++) {
+ gdouble norm[3];
+ gdouble *v0 = points[faces[j][0]];
+ gdouble *v1 = points[faces[j][1]];
+ gdouble *v2 = points[faces[j][2]];
+ crossd3(v2, v1, v0, norm);
+ glNormal3dv(norm);
+ glBegin(GL_TRIANGLES);
+ glVertex3dv(v0);
+ glVertex3dv(v1);
+ glVertex3dv(v2);
+ glEnd();
}
+ glRotatef(90, 0, 0, 1);
+ }
+
+ /* Draw outline */
+ glEnable(GL_POLYGON_OFFSET_LINE);
+ glDisable(GL_LIGHTING);
+ glPolygonOffset(0, 0);
+ glColor4f(0, 0, 0, 0.25);
+ glLineWidth(1);
+ for (int i = 0; i < G_N_ELEMENTS(colors); i++) {
+ glBegin(GL_LINE_STRIP);
+ for (int j = 0; j < G_N_ELEMENTS(outline); j++)
+ glVertex3dv(points[outline[j]]);
glEnd();
- glPopMatrix();
+ glRotatef(90, 0, 0, 1);
+ }
+}
+
+static gboolean compass_draw_teapot(gdouble scale, GritsPluginEnv *env)
+{
+ static int teatime = 0;
+#ifdef HAVE_GLUT
+ static int init, argc; char *argv[] = {"", NULL};
+ if (!init) {
+ teatime = grits_prefs_get_boolean(env->prefs, "grits/teatime", NULL);
+ glutInit(&argc, argv);
+ init = 1;
+ g_message("teatime=%d", teatime);
}
- */
- return NULL;
+ if (teatime) {
+ /* Setup lighting */
+ float light_ambient[] = {0.1f, 0.1f, 0.0f, 1.0f};
+ float light_diffuse[] = {0.9f, 0.9f, 0.9f, 1.0f};
+ float light_position[] = {-50.0f, -40.0f, -80.0f, 1.0f};
+ glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+ glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+
+ /* Draw teapot */
+ glRotatef(-90, 0, 0, 1);
+ glRotatef(-90, 1, 0, 0);
+ glColor4f(0.9, 0.9, 0.7, 1.0);
+ glutSolidTeapot(scale * 0.60);
+ }
+#endif
+ return teatime;
}
+static void compass_expose(GritsCallback *compass, GritsOpenGL *opengl, gpointer _env)
+{
+ GritsPluginEnv *env = GRITS_PLUGIN_ENV(_env);
+ g_debug("GritsPluginEnv: compass_expose");
+ gdouble x, y, z;
+ grits_viewer_get_rotation(env->viewer, &x, &y, &z);
+
+ /* Setup projection */
+ gint win_width = GTK_WIDGET(opengl)->allocation.width;
+ gint win_height = GTK_WIDGET(opengl)->allocation.height;
+ float scale = CLAMP(MIN(win_width,win_height)/2.0 * 0.1, 40, 100);
+ float offset = scale + 20;
+ glTranslatef(win_width - offset, offset, 0);
+
+ /* Setup state */
+ glClear(GL_DEPTH_BUFFER_BIT);
+ glEnable(GL_COLOR_MATERIAL);
+ glEnable(GL_DEPTH_TEST);
+ glDisable(GL_CULL_FACE);
+ glEnable(GL_POLYGON_SMOOTH);
+ glEnable(GL_LINE_SMOOTH);
+
+ /* Draw compass */
+ x = CLAMP(x, -66, 66);;
+ glRotatef(x, 1, 0, 0);
+ glRotatef(-z, 0, 0, 1);
+ if (!compass_draw_teapot(scale, env))
+ compass_draw_compass(scale);
+}
+
+static gboolean compass_click(GritsCallback *compass, GdkEvent *evnet, GritsViewer *viewer)
+{
+ grits_viewer_set_rotation(viewer, 0, 0, 0);
+ return TRUE;
+}
+
+/* Info */
+static void info_expose(GritsCallback *compass, GritsOpenGL *opengl, gpointer _env)
+{
+ gint win_width = GTK_WIDGET(opengl)->allocation.width;
+ gint win_height = GTK_WIDGET(opengl)->allocation.height;
+
+ /* Create cairo surface */
+ guint tex = 0;
+ const gchar *label0 = "Location: %7.3lf°, %8.3lf°, %4.0fm";
+ const gchar *label1 = "Cursor: %7.3lf°, %8.3lf°, %4.0fm";
+ gdouble width = 300;
+ gdouble height = 200;
+ cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
+ cairo_t *cairo = cairo_create(surface);
+
+ /* Text */
+ gdouble lat, lon, elev;
+ grits_viewer_get_location(GRITS_VIEWER(opengl), &lat, &lon, &elev);
+ gchar *text0 = g_strdup_printf(label0, lat, lon, elev);
+ gchar *text1 = g_strdup_printf(label1, lat, lon, elev);
+
+ /* Draw outline */
+ cairo_set_line_width(cairo, 3);
+ cairo_set_source_rgba(cairo, 0, 0, 0, 0.75);
+ cairo_move_to(cairo, 2, 20); cairo_text_path(cairo, text0);
+ cairo_move_to(cairo, 2, 40); cairo_text_path(cairo, text1);
+ cairo_stroke(cairo);
+
+ /* Draw filler */
+ cairo_set_source_rgba(cairo, 1, 1, 1, 1);
+ cairo_move_to(cairo, 2, 20); cairo_show_text(cairo, text0);
+ cairo_move_to(cairo, 2, 40); cairo_show_text(cairo, text1);
+
+ /* Setup pango */
+ PangoLayout *layout = pango_cairo_create_layout(cairo);
+ PangoFontDescription *font = pango_font_description_from_string("Mono 9");
+ pango_layout_set_font_description(layout, font);
+ pango_font_description_free(font);
+ pango_layout_set_text(layout, text0, -1);
+ pango_cairo_update_layout(cairo, layout);
+ cairo_set_line_join(cairo, CAIRO_LINE_JOIN_ROUND);
+ cairo_move_to(cairo, 2, 40);
+ pango_cairo_layout_path(cairo, layout);
+ for (float w = 0.2; w <= 0.8; w+=0.2) {
+ cairo_set_line_width(cairo, (1-w)*8);
+ cairo_set_source_rgba(cairo, 0, 0, 0, w);
+ cairo_stroke_preserve(cairo);
+ }
+ cairo_set_source_rgba(cairo, 1, 1, 1, 1);
+ pango_cairo_show_layout(cairo, layout);
+
+ /* Load GL texture */
+ glEnable(GL_TEXTURE_2D);
+ glGenTextures(1, &tex);
+ glBindTexture(GL_TEXTURE_2D, tex);
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height,
+ 0, GL_BGRA, GL_UNSIGNED_BYTE, cairo_image_surface_get_data(surface));
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+ /* Draw surface */
+ glDisable(GL_LIGHTING);
+ glDisable(GL_COLOR_MATERIAL);
+ glDisable(GL_DEPTH_TEST);
+ glEnable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, tex);
+ glDisable(GL_CULL_FACE);
+ glTranslatef(win_width - width, win_height - height, 0);
+ glBegin(GL_QUADS);
+ glTexCoord2f(1, 0); glVertex3f(width, 0 , 0); // 0 - 3 0
+ glTexCoord2f(1, 1); glVertex3f(width, height, 0); // 1 - | |
+ glTexCoord2f(0, 1); glVertex3f(0 , height, 0); // 2 - | |
+ glTexCoord2f(0, 0); glVertex3f(0 , 0 , 0); // 3 - 2----1
+ glEnd();
+}
/***********
* Methods *
***********/
-GisPluginEnv *gis_plugin_env_new(GisViewer *viewer, GisPrefs *prefs)
+/**
+ * grits_plugin_env_new:
+ * @viewer: the #GritsViewer to use for drawing
+ * @prefs: the #GritsPrefs for storing configurations
+ *
+ * Create a new instance of the environment plugin.
+ *
+ * Returns: the new #GritsPluginEnv
+ */
+GritsPluginEnv *grits_plugin_env_new(GritsViewer *viewer, GritsPrefs *prefs)
{
- g_debug("GisPluginEnv: new");
- GisPluginEnv *self = g_object_new(GIS_TYPE_PLUGIN_ENV, NULL);
- self->viewer = viewer;
+ g_debug("GritsPluginEnv: new");
+ GritsPluginEnv *env = g_object_new(GRITS_TYPE_PLUGIN_ENV, NULL);
+ env->viewer = g_object_ref(viewer);
+ env->prefs = g_object_ref(prefs);
+
+ /* Add sky */
+ GritsCallback *sky = grits_callback_new(sky_expose, env);
+ grits_viewer_add(viewer, GRITS_OBJECT(sky), GRITS_LEVEL_BACKGROUND, FALSE);
+ env->refs = g_list_prepend(env->refs, sky);
- /* Add renderers */
- GisCallback *callback = gis_callback_new(expose, self);
- gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_BACKGROUND, 0);
+ /* Add compass */
+ GritsCallback *compass = grits_callback_new(compass_expose, env);
+ grits_viewer_add(viewer, GRITS_OBJECT(compass), GRITS_LEVEL_HUD, TRUE);
+ g_signal_connect(compass, "clicked", G_CALLBACK(compass_click), viewer);
+ grits_object_set_cursor(GRITS_OBJECT(compass), GDK_CROSS);
+ env->refs = g_list_prepend(env->refs, compass);
- return self;
+ /* Add info */
+ //GritsCallback *info = grits_callback_new(info_expose, env);
+ //grits_viewer_add(viewer, GRITS_OBJECT(info), GRITS_LEVEL_HUD, FALSE);
+ //env->refs = g_list_prepend(env->refs, info);
+ (void)info_expose;
+
+ /* Add background */
+ //GritsTile *background = grits_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
+ //glGenTextures(1, &env->tex);
+ //background->data = &env->tex;
+ //grits_viewer_add(viewer, GRITS_OBJECT(background), GRITS_LEVEL_BACKGROUND, FALSE);
+ //env->refs = g_list_prepend(env->refs, background);
+
+ return env;
}
* 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)
+static void grits_plugin_env_plugin_init(GritsPluginInterface *iface);
+G_DEFINE_TYPE_WITH_CODE(GritsPluginEnv, grits_plugin_env, G_TYPE_OBJECT,
+ G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN,
+ grits_plugin_env_plugin_init));
+static void grits_plugin_env_plugin_init(GritsPluginInterface *iface)
{
- g_debug("GisPluginEnv: plugin_init");
+ g_debug("GritsPluginEnv: plugin_init");
/* Add methods to the interface */
}
/* Class/Object init */
-static void gis_plugin_env_init(GisPluginEnv *self)
+static void grits_plugin_env_init(GritsPluginEnv *env)
{
- g_debug("GisPluginEnv: init");
+ g_debug("GritsPluginEnv: init");
/* Set defaults */
}
-static void gis_plugin_env_dispose(GObject *gobject)
+static void grits_plugin_env_dispose(GObject *gobject)
{
- g_debug("GisPluginEnv: dispose");
- GisPluginEnv *self = GIS_PLUGIN_ENV(gobject);
+ g_debug("GritsPluginEnv: dispose");
+ GritsPluginEnv *env = GRITS_PLUGIN_ENV(gobject);
/* Drop references */
- G_OBJECT_CLASS(gis_plugin_env_parent_class)->dispose(gobject);
+ if (env->viewer) {
+ for (GList *cur = env->refs; cur; cur = cur->next)
+ grits_viewer_remove(env->viewer, cur->data);
+ g_list_free_full(env->refs, g_object_unref);
+ g_object_unref(env->viewer);
+ g_object_unref(env->prefs);
+ glDeleteTextures(1, &env->tex);
+ env->viewer = NULL;
+ }
+ G_OBJECT_CLASS(grits_plugin_env_parent_class)->dispose(gobject);
}
-static void gis_plugin_env_class_init(GisPluginEnvClass *klass)
+static void grits_plugin_env_class_init(GritsPluginEnvClass *klass)
{
- g_debug("GisPluginEnv: class_init");
+ g_debug("GritsPluginEnv: class_init");
GObjectClass *gobject_class = (GObjectClass*)klass;
- gobject_class->dispose = gis_plugin_env_dispose;
+ gobject_class->dispose = grits_plugin_env_dispose;
}
projects / grits / blobdiff