Added ESC key handling
diff --git a/progs/redbook/double.c b/progs/redbook/double.c
index 65dfd4b..a41229d 100644
--- a/progs/redbook/double.c
+++ b/progs/redbook/double.c
@@ -1,13 +1,13 @@
/*
* Copyright (c) 1993-1997, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED
- * Permission to use, copy, modify, and distribute this software for
+ * ALL RIGHTS RESERVED
+ * Permission to use, copy, modify, and distribute this software for
* any purpose and without fee is hereby granted, provided that the above
* copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that
+ * and this permission notice appear in supporting documentation, and that
* the name of Silicon Graphics, Inc. not be used in advertising
* or publicity pertaining to distribution of the software without specific,
- * written prior permission.
+ * written prior permission.
*
* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
@@ -21,8 +21,8 @@
* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * US Government Users Restricted Rights
+ *
+ * US Government Users Restricted Rights
* Use, duplication, or disclosure by the Government is subject to
* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
* (c)(1)(ii) of the Rights in Technical Data and Computer Software
@@ -66,7 +66,7 @@
glutPostRedisplay();
}
-void init(void)
+void init(void)
{
glClearColor (0.0, 0.0, 0.0, 0.0);
glShadeModel (GL_FLAT);
@@ -83,7 +83,7 @@
}
/* ARGSUSED2 */
-void mouse(int button, int state, int x, int y)
+void mouse(int button, int state, int x, int y)
{
switch (button) {
case GLUT_LEFT_BUTTON:
@@ -98,8 +98,21 @@
break;
}
}
-
-/*
+
+static void
+key(unsigned char k, int x, int y)
+{
+ switch (k) {
+ case 27: /* Escape */
+ exit(0);
+ break;
+ default:
+ return;
+ }
+ glutPostRedisplay();
+}
+
+/*
* Request double buffer display mode.
* Register mouse input callback functions
*/
@@ -107,13 +120,14 @@
{
glutInit(&argc, argv);
glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
- glutInitWindowSize (250, 250);
+ glutInitWindowSize (250, 250);
glutInitWindowPosition (100, 100);
glutCreateWindow (argv[0]);
init ();
- glutDisplayFunc(display);
- glutReshapeFunc(reshape);
+ glutDisplayFunc(display);
+ glutReshapeFunc(reshape);
glutMouseFunc(mouse);
+ glutKeyboardFunc(key);
glutMainLoop();
return 0; /* ANSI C requires main to return int. */
}