3 #include <gdk/gdkkeysyms.h>
8 static gboolean on_expose(GtkWidget *drawing, GdkEventExpose *event, gpointer _)
10 //glClearColor(0.5, 0.5, 1.0, 1.0);
11 glClearColor(0.0, 0.0, 0.0, 0.0);
12 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
14 /* No sorting, just add */
16 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
17 //glBlendFunc(GL_ONE, GL_ONE);
20 glMatrixMode(GL_MODELVIEW);
22 float light_ambient[] = {0.3f, 0.3f, 0.1f, 1.0f};
23 float light_diffuse[] = {0.9f, 0.9f, 0.9f, 1.0f};
24 float light_position[] = {-30.0f, 50.0f, 40.0f, 1.0f};
25 glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
26 glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
27 glLightfv(GL_LIGHT0, GL_POSITION, light_position);
28 glEnable(GL_COLOR_MATERIAL);
29 glEnable(GL_LIGHTING);
33 glMatrixMode(GL_PROJECTION);
35 glFrustum(-1,1, -1,1, 2,10);
37 glMatrixMode(GL_MODELVIEW);
39 gluLookAt(0,2,-3, 0,0,0, 0,1,0);
42 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
44 glColor4f(1, 0, 0, 0.5);
45 glBegin(GL_TRIANGLE_STRIP);
47 glVertex3i(-1, -1, 1);
48 glVertex3i( 1, 1, -1);
49 glVertex3i( 1, -1, -1);
52 glColor4f(0, 1, 0, 0.5);
53 glBegin(GL_TRIANGLE_STRIP);
55 glVertex3i( 1, -1, 1);
56 glVertex3i(-1, 1, -1);
57 glVertex3i(-1, -1, -1);
61 GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
62 if (gdk_gl_drawable_is_double_buffered(gldrawable))
63 gdk_gl_drawable_swap_buffers(gldrawable);
69 static gboolean on_configure(GtkWidget *drawing, GdkEventConfigure *event, gpointer _)
72 drawing->allocation.width,
73 drawing->allocation.height);
77 static gboolean on_key_press(GtkWidget *widget, GdkEventKey *event, gpointer _)
79 if (event->keyval == GDK_q)
84 int main(int argc, char **argv)
86 gtk_init(&argc, &argv);
88 GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
89 GtkWidget *drawing = gtk_drawing_area_new();
90 GdkGLConfig *glconfig = gdk_gl_config_new_by_mode((GdkGLConfigMode)(
91 GDK_GL_MODE_RGBA | GDK_GL_MODE_DEPTH |
92 GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA));
93 g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
94 g_signal_connect(window, "key-press-event", G_CALLBACK(on_key_press), NULL);
95 g_signal_connect(drawing, "expose-event", G_CALLBACK(on_expose), NULL);
96 g_signal_connect(drawing, "configure-event", G_CALLBACK(on_configure), NULL);
97 gtk_widget_set_gl_capability(drawing, glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE);
98 gtk_container_add(GTK_CONTAINER(window), drawing);
99 gtk_widget_show_all(window);
102 GdkGLContext *glcontext = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
103 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
104 gdk_gl_drawable_gl_begin(gldrawable, glcontext);
108 gdk_gl_drawable_gl_end(gldrawable);