--- /dev/null
+/*
+ * 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 <config.h>
+#include <math.h>
+#include <gdk/gdkkeysyms.h>
+#include <gtk/gtk.h>
+#include <gtk/gtkgl.h>
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#include "misc.h"
+#include "aweather-gui.h"
+#include "gis-world.h"
+#include "gis-view.h"
+#include "gis-opengl.h"
+
+/****************
+ * GObject code *
+ ****************/
+G_DEFINE_TYPE(GisOpenGL, gis_opengl, G_TYPE_OBJECT);
+static void gis_opengl_init(GisOpenGL *self)
+{
+ g_debug("GisOpenGL: init");
+}
+static GObject *gis_opengl_constructor(GType gtype, guint n_properties,
+ GObjectConstructParam *properties)
+{
+ g_debug("gis_opengl: constructor");
+ GObjectClass *parent_class = G_OBJECT_CLASS(gis_opengl_parent_class);
+ return parent_class->constructor(gtype, n_properties, properties);
+}
+static void gis_opengl_dispose(GObject *gobject)
+{
+ g_debug("GisOpenGL: dispose");
+ GisOpenGL *self = GIS_OPENGL(gobject);
+ if (self->world) {
+ g_object_unref(self->world);
+ self->world = NULL;
+ }
+ if (self->view) {
+ g_object_unref(self->view);
+ self->view = NULL;
+ }
+ if (self->drawing) {
+ g_object_unref(self->drawing);
+ self->drawing = NULL;
+ }
+ G_OBJECT_CLASS(gis_opengl_parent_class)->dispose(gobject);
+}
+static void gis_opengl_finalize(GObject *gobject)
+{
+ g_debug("GisOpenGL: finalize");
+ G_OBJECT_CLASS(gis_opengl_parent_class)->finalize(gobject);
+ gtk_main_quit();
+
+}
+static void gis_opengl_class_init(GisOpenGLClass *klass)
+{
+ g_debug("GisOpenGL: class_init");
+ GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
+ gobject_class->constructor = gis_opengl_constructor;
+ gobject_class->dispose = gis_opengl_dispose;
+ gobject_class->finalize = gis_opengl_finalize;
+}
+
+/*************
+ * Callbacks *
+ *************/
+gboolean on_button_press(GtkWidget *widget, GdkEventButton *event, GisOpenGL *self)
+{
+ g_debug("GisOpenGL: on_drawing_button_press - Grabbing focus");
+ gtk_widget_grab_focus(GTK_WIDGET(self->drawing));
+ return TRUE;
+}
+gboolean on_key_press(GtkWidget *widget, GdkEventKey *event, GisOpenGL *self)
+{
+ g_debug("GisOpenGL: on_drawing_key_press - key=%x, state=%x, plus=%x",
+ event->keyval, event->state, GDK_plus);
+ double x,y,z;
+ gis_view_get_location(self->view, &x, &y, &z);
+ guint kv = event->keyval;
+ if (kv == GDK_Left || kv == GDK_h) gis_view_pan(self->view, -z/10, 0, 0);
+ else if (kv == GDK_Down || kv == GDK_j) gis_view_pan(self->view, 0, -z/10, 0);
+ else if (kv == GDK_Up || kv == GDK_k) gis_view_pan(self->view, 0, z/10, 0);
+ else if (kv == GDK_Right || kv == GDK_l) gis_view_pan(self->view, z/10, 0, 0);
+ else if (kv == GDK_minus || kv == GDK_o) gis_view_zoom(self->view, 10./9);
+ else if (kv == GDK_plus || kv == GDK_i) gis_view_zoom(self->view, 9./10);
+ else if (kv == GDK_H ) gis_view_rotate(self->view, 0, -10, 0);
+ else if (kv == GDK_J ) gis_view_rotate(self->view, 10, 0, 0);
+ else if (kv == GDK_K ) gis_view_rotate(self->view, -10, 0, 0);
+ else if (kv == GDK_L ) gis_view_rotate(self->view, 0, 10, 0);
+ return TRUE;
+}
+
+
+gboolean on_map(GtkWidget *drawing, GdkEventConfigure *event, GisOpenGL *self)
+{
+ g_debug("GisOpenGL: on_map");
+
+ /* Misc */
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+
+ /* Tessellation, "finding intersecting triangles" */
+ /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
+ /* http://www.opengl.org/wiki/Alpha_Blending */
+ glAlphaFunc(GL_GREATER,0.1);
+ glEnable(GL_ALPHA_TEST);
+
+ /* Depth test */
+ glClearDepth(1.0);
+ glDepthFunc(GL_LEQUAL);
+ glEnable(GL_DEPTH_TEST);
+
+ gis_opengl_end(self);
+ return FALSE;
+}
+
+gboolean on_configure(GtkWidget *drawing, GdkEventConfigure *event, GisOpenGL *self)
+{
+ g_debug("GisOpenGL: on_confiure");
+ gis_opengl_begin(self);
+
+ double x, y, z;
+ gis_view_get_location(self->view, &x, &y, &z);
+
+ /* Window is at 500 m from camera */
+ double width = GTK_WIDGET(self->drawing)->allocation.width;
+ double height = GTK_WIDGET(self->drawing)->allocation.height;
+
+ glViewport(0, 0, width, height);
+
+ /* Perspective */
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ double ang = atan((height/2)/500);
+
+ //gluPerspective(r2d(ang)*2, width/height, -z-20, -z+20);
+ gluPerspective(r2d(ang)*2, width/height, 1, 500*1000);
+
+ gis_opengl_end(self);
+ return FALSE;
+}
+
+gboolean on_expose(GtkWidget *drawing, GdkEventExpose *event, GisOpenGL *self)
+{
+ g_debug("GisOpenGL: on_expose - begin");
+ gis_opengl_begin(self);
+
+ double lx, ly, lz;
+ double rx, ry, rz;
+ gis_view_get_location(self->view, &lx, &ly, &lz);
+ gis_view_get_rotation(self->view, &rx, &ry, &rz);
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glTranslatef(lx, ly, lz);
+ glRotatef(rx, 1, 0, 0);
+ glRotatef(ry, 0, 1, 0);
+ glRotatef(rz, 0, 0, 1);
+
+ /* Expose plugins */
+ /* TODO: Figure out how to handle plugins:
+ * - Do they belong to AWeatherGui, GisOpenGL, etc?
+ */
+ for (GList *cur = self->plugins; cur; cur = cur->next) {
+ AWeatherPlugin *plugin = AWEATHER_PLUGIN(cur->data);
+ aweather_plugin_expose(plugin);
+ }
+
+ gis_opengl_end(self);
+ gis_opengl_flush(self);
+ g_debug("GisOpenGL: on_expose - end\n");
+ return FALSE;
+}
+
+void on_state_changed(GisView *view,
+ gdouble x, gdouble y, gdouble z, GisOpenGL *self)
+{
+ /* Reset clipping area and redraw */
+ on_configure(NULL, NULL, self);
+ gis_opengl_redraw(self);
+}
+
+/***********
+ * Methods *
+ ***********/
+GisOpenGL *gis_opengl_new(GisWorld *world, GisView *view, GtkDrawingArea *drawing)
+{
+ g_debug("GisOpenGL: new");
+ GisOpenGL *self = g_object_new(GIS_TYPE_OPENGL, NULL);
+ self->world = world;
+ self->view = view;
+ self->drawing = drawing;
+ g_object_ref(world);
+ g_object_ref(view);
+ g_object_ref(drawing);
+
+ /* OpenGL setup */
+ GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
+ GDK_GL_MODE_RGBA | GDK_GL_MODE_DEPTH |
+ GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
+ if (!glconfig)
+ g_error("Failed to create glconfig");
+ if (!gtk_widget_set_gl_capability(GTK_WIDGET(self->drawing),
+ glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
+ g_error("GL lacks required capabilities");
+
+ g_signal_connect(self->view, "location-changed", G_CALLBACK(on_state_changed), self);
+ g_signal_connect(self->view, "rotation-changed", G_CALLBACK(on_state_changed), self);
+
+ g_signal_connect(self->drawing, "map-event", G_CALLBACK(on_map), self);
+ g_signal_connect(self->drawing, "configure-event", G_CALLBACK(on_configure), self);
+ g_signal_connect(self->drawing, "expose-event", G_CALLBACK(on_expose), self);
+
+ g_signal_connect(self->drawing, "button-press-event", G_CALLBACK(on_button_press), self);
+ g_signal_connect(self->drawing, "enter-notify-event", G_CALLBACK(on_button_press), self);
+ g_signal_connect(self->drawing, "key-press-event", G_CALLBACK(on_key_press), self);
+ return self;
+}
+
+void gis_opengl_redraw(GisOpenGL *self)
+{
+ g_debug("GisOpenGL: gl_redraw");
+ gtk_widget_queue_draw(GTK_WIDGET(self->drawing));
+}
+void gis_opengl_begin(GisOpenGL *self)
+{
+ g_assert(GIS_IS_OPENGL(self));
+
+ GdkGLContext *glcontext = gtk_widget_get_gl_context(GTK_WIDGET(self->drawing));
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(self->drawing));
+
+ if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
+ g_assert_not_reached();
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+void gis_opengl_end(GisOpenGL *self)
+{
+ g_assert(GIS_IS_OPENGL(self));
+ GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
+ gdk_gl_drawable_gl_end(gldrawable);
+}
+void gis_opengl_flush(GisOpenGL *self)
+{
+ g_assert(GIS_IS_OPENGL(self));
+ GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
+ if (gdk_gl_drawable_is_double_buffered(gldrawable))
+ gdk_gl_drawable_swap_buffers(gldrawable);
+ else
+ glFlush();
+ gdk_gl_drawable_gl_end(gldrawable);
+}
projects / aweather / blobdiff