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

   1 #include <config.h>
   2 #include <gtk/gtk.h>
   3 #include <gtk/gtkgl.h>
   4 #include <gdk/gdkkeysyms.h>
   5 #include <GL/gl.h>
   6 #include <math.h>
   7
   8 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data);
   9 static gboolean rotate(gpointer user_data);
  10
  11 static GtkWidget *rotate_button;
  12
  13 float boxv[][3] = {
  14         { -0.5, -0.5, -0.5 },
  15         {  0.5, -0.5, -0.5 },
  16         {  0.5,  0.5, -0.5 },
  17         { -0.5,  0.5, -0.5 },
  18         { -0.5, -0.5,  0.5 },
  19         {  0.5, -0.5,  0.5 },
  20         {  0.5,  0.5,  0.5 },
  21         { -0.5,  0.5,  0.5 }
  22 };
  23 #define ALPHA 0.5
  24
  25 static float ang = 30.;
  26
  27 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
  28 {
  29         //GdkGLContext  *glcontext  = gtk_widget_get_gl_context (da);
  30         //GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (da);
  31
  32         /* draw in here */
  33         glPushMatrix();
  34
  35         glRotatef (ang, 1, 0, 1);
  36
  37         glShadeModel(GL_FLAT);
  38
  39         glBegin (GL_LINES);
  40         glColor3f (1., 0., 0.);
  41         glVertex3f (0., 0., 0.);
  42         glVertex3f (1., 0., 0.);
  43         glEnd ();
  44
  45         glBegin (GL_LINES);
  46         glColor3f (0., 1., 0.);
  47         glVertex3f (0., 0., 0.);
  48         glVertex3f (0., 1., 0.);
  49         glEnd ();
  50
  51         glBegin (GL_LINES);
  52         glColor3f (0., 0., 1.);
  53         glVertex3f (0., 0., 0.);
  54         glVertex3f (0., 0., 1.);
  55         glEnd ();
  56
  57         glBegin(GL_LINES);
  58         glColor3f (1., 1., 1.);
  59         glVertex3fv(boxv[0]);
  60         glVertex3fv(boxv[1]);
  61
  62         glVertex3fv(boxv[1]);
  63         glVertex3fv(boxv[2]);
  64
  65         glVertex3fv(boxv[2]);
  66         glVertex3fv(boxv[3]);
  67
  68         glVertex3fv(boxv[3]);
  69         glVertex3fv(boxv[0]);
  70
  71         glVertex3fv(boxv[4]);
  72         glVertex3fv(boxv[5]);
  73
  74         glVertex3fv(boxv[5]);
  75         glVertex3fv(boxv[6]);
  76
  77         glVertex3fv(boxv[6]);
  78         glVertex3fv(boxv[7]);
  79
  80         glVertex3fv(boxv[7]);
  81         glVertex3fv(boxv[4]);
  82
  83         glVertex3fv(boxv[0]);
  84         glVertex3fv(boxv[4]);
  85
  86         glVertex3fv(boxv[1]);
  87         glVertex3fv(boxv[5]);
  88
  89         glVertex3fv(boxv[2]);
  90         glVertex3fv(boxv[6]);
  91
  92         glVertex3fv(boxv[3]);
  93         glVertex3fv(boxv[7]);
  94         glEnd();
  95
  96         glPopMatrix ();
  97
  98         return FALSE;
  99 }
 100
 101 static gboolean rotate(gpointer user_data)
 102 {
 103         if (!gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(rotate_button)))
 104                 return TRUE;
 105
 106         GtkWidget *da = GTK_WIDGET (user_data);
 107
 108         ang++;
 109
 110         gdk_window_invalidate_rect(da->window, &da->allocation, FALSE);
 111         gdk_window_process_updates(da->window, FALSE);
 112
 113         return TRUE;
 114 }
 115
 116 gboolean cube_init(GtkDrawingArea *drawing, GtkNotebook *config)
 117 {
 118         /* Add configuration tab */
 119         GtkWidget *label = gtk_label_new("Cube");
 120         rotate_button = gtk_toggle_button_new_with_label("Rotate");
 121         gtk_notebook_append_page(GTK_NOTEBOOK(config), rotate_button, label);
 122
 123         /* Set up OpenGL Stuff */
 124         g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
 125         g_timeout_add(1000/60, rotate, drawing);
 126         return TRUE;
 127 }