Pileus Git - grits/blob - src/example.c

   1 #include <config.h>
   2 #include <gtk/gtk.h>
   3 #include <gtk/gtkgl.h>
   4 #include <GL/gl.h>
   5
   6 static GtkWidget *rotate_button;
   7
   8 static float ang = 30.;
   9
  10 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
  11 {
  12         glPushMatrix();
  13         glDisable(GL_TEXTURE_2D);
  14         glLoadIdentity();
  15         glTranslatef(0.5, -0.5, -2);
  16
  17         float light_ambient[]  = {0.1f, 0.1f, 0.0f};
  18         float light_diffuse[]  = {0.9f, 0.9f, 0.9f};
  19         float light_position[] = {-20.0f, 40.0f, -40.0f, 1.0f};
  20         glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
  21         glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
  22         glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  23         glEnable(GL_LIGHT0);
  24         glEnable(GL_LIGHTING);
  25         glEnable(GL_COLOR_MATERIAL);
  26
  27         glRotatef(ang, 1, 0, 1);
  28         glColor4f(0.9, 0.9, 0.7, 1.0);
  29         gdk_gl_draw_teapot(TRUE, 0.25);
  30         gdk_gl_draw_cube(TRUE, 0.25);
  31         glColor4f(1.0, 1.0, 1.0, 1.0);
  32
  33         glDisable(GL_LIGHT0);
  34         glDisable(GL_LIGHTING);
  35         glDisable(GL_COLOR_MATERIAL);
  36
  37         glPopMatrix();
  38         return FALSE;
  39 }
  40
  41 static gboolean rotate(gpointer user_data)
  42 {
  43         if (!gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(rotate_button)))
  44                 return TRUE;
  45
  46         GtkWidget *da = GTK_WIDGET (user_data);
  47
  48         ang++;
  49
  50         gdk_window_invalidate_rect(da->window, &da->allocation, FALSE);
  51         gdk_window_process_updates(da->window, FALSE);
  52
  53         return TRUE;
  54 }
  55
  56 gboolean example_init(GtkDrawingArea *drawing, GtkNotebook *config)
  57 {
  58         /* Add configuration tab */
  59         GtkWidget *label = gtk_label_new("example");
  60         rotate_button = gtk_toggle_button_new_with_label("Rotate");
  61         gtk_notebook_append_page(GTK_NOTEBOOK(config), rotate_button, label);
  62
  63         /* Set up OpenGL Stuff */
  64         g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
  65         g_timeout_add(1000/60, rotate, drawing);
  66         return TRUE;
  67 }