1 (defpackage :gtk-glext-demo
2 (:use :cl :gtk :gtkglext :gobject :glib)
5 (in-package :gtk-glext-demo)
9 (defun draw (widget event)
10 (declare (ignore event))
11 (with-gl-context (widget)
12 (gl:clear-color 0 0 0 0)
16 (gl:shade-model :smooth)
17 (gl:light-model :light-model-local-viewer 1)
18 (gl:color-material :front :ambient-and-diffuse)
19 (gl:enable :light0 :lighting :cull-face :depth-test)
22 (gl:rotate *theta* 1 1 0)
23 (gl:light :light0 :position '(0 1 1 0))
24 (gl:light :light0 :diffuse '(0.2 0.4 0.6 0))
25 (gl:clear :color-buffer-bit :depth-buffer-bit)
28 (glut:solid-teapot 1.5)
35 (let ((window (make-instance 'gtk-window
37 :window-position :center
41 (v-box (make-instance 'v-box))
42 (label (make-instance 'label :label "Click me!"))
43 (drawing (make-instance 'gl-drawing-area :on-expose #'draw)))
44 (box-pack-start v-box drawing)
45 (box-pack-start v-box label :expand nil)
46 (container-add window v-box)
47 (let ((source-id (gtk-main-add-timeout 100 (lambda ()
49 (mod (+ *theta* 0.5) 360))
50 (widget-queue-draw drawing)
51 (setf (label-label label)
52 (format nil "Theta = ~A" *theta*))
54 (connect-signal window "delete-event" (lambda (w e)
55 (declare (ignore w e))
56 (g-source-remove source-id)
58 (widget-show window :all t))))