Added ESC key handling

1 files changed, 31 insertions, 17 deletions

diff --git a/progs/redbook/accanti.c b/progs/redbook/accanti.c
index d45cf9e64e..12ca16f7a5 100644
--- a/progs/redbook/accanti.c
+++ b/progs/redbook/accanti.c
@@ -3,14 +3,14 @@
 
 /*
  * (c) Copyright 1993, 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,
@@ -24,8 +24,8 @@
  * 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
@@ -57,7 +57,7 @@ void myinit(void)
     glMaterialf(GL_FRONT, GL_SHININESS, 50.0);
     glLightfv(GL_LIGHT0, GL_POSITION, light_position);
     glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lm_ambient);
-    
+
     glEnable(GL_LIGHTING);
     glEnable(GL_LIGHT0);
     glDepthFunc(GL_LESS);
@@ -68,25 +68,25 @@ void myinit(void)
     glClearAccum(0.0, 0.0, 0.0, 0.0);
 }
 
-void displayObjects(void) 
+void displayObjects(void)
 {
     GLfloat torus_diffuse[] = { 0.7, 0.7, 0.0, 1.0 };
     GLfloat cube_diffuse[] = { 0.0, 0.7, 0.7, 1.0 };
     GLfloat sphere_diffuse[] = { 0.7, 0.0, 0.7, 1.0 };
     GLfloat octa_diffuse[] = { 0.7, 0.4, 0.4, 1.0 };
-    
+
     glPushMatrix ();
     glRotatef (30.0, 1.0, 0.0, 0.0);
 
     glPushMatrix ();
-    glTranslatef (-0.80, 0.35, 0.0); 
+    glTranslatef (-0.80, 0.35, 0.0);
     glRotatef (100.0, 1.0, 0.0, 0.0);
     glMaterialfv(GL_FRONT, GL_DIFFUSE, torus_diffuse);
     glutSolidTorus (0.275, 0.85, 16, 16);
     glPopMatrix ();
 
     glPushMatrix ();
-    glTranslatef (-0.75, -0.50, 0.0); 
+    glTranslatef (-0.75, -0.50, 0.0);
     glRotatef (45.0, 0.0, 0.0, 1.0);
     glRotatef (45.0, 1.0, 0.0, 0.0);
     glMaterialfv(GL_FRONT, GL_DIFFUSE, cube_diffuse);
@@ -94,14 +94,14 @@ void displayObjects(void)
     glPopMatrix ();
 
     glPushMatrix ();
-    glTranslatef (0.75, 0.60, 0.0); 
+    glTranslatef (0.75, 0.60, 0.0);
     glRotatef (30.0, 1.0, 0.0, 0.0);
     glMaterialfv(GL_FRONT, GL_DIFFUSE, sphere_diffuse);
     glutSolidSphere (1.0, 16, 16);
     glPopMatrix ();
 
     glPushMatrix ();
-    glTranslatef (0.70, -0.90, 0.25); 
+    glTranslatef (0.70, -0.90, 0.25);
     glMaterialfv(GL_FRONT, GL_DIFFUSE, octa_diffuse);
     glutSolidOctahedron ();
     glPopMatrix ();
@@ -124,7 +124,7 @@ void display(void)
 	glPushMatrix ();
 /*	Note that 4.5 is the distance in world space between
  *	left and right and bottom and top.
- *	This formula converts fractional pixel movement to 
+ *	This formula converts fractional pixel movement to
  *	world coordinates.
  */
 	glTranslatef (j8[jitter].x*4.5/viewport[2],
@@ -142,15 +142,28 @@ void myReshape(int w, int h)
     glViewport(0, 0, w, h);
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
-    if (w <= h) 
+    if (w <= h)
 	glOrtho (-2.25, 2.25, -2.25*h/w, 2.25*h/w, -10.0, 10.0);
-    else 
+    else
 	glOrtho (-2.25*w/h, 2.25*w/h, -2.25, 2.25, -10.0, 10.0);
     glMatrixMode(GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
- *  Open window with initial window size, title bar, 
+ *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
  */
 int main(int argc, char** argv)
@@ -163,6 +176,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }