Added ESC key handling

1 files changed, 28 insertions, 15 deletions

diff --git a/progs/redbook/material.c b/progs/redbook/material.c
index f8d6a918f47..f9a4fc59288 100644
--- a/progs/redbook/material.c
+++ b/progs/redbook/material.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
@@ -46,7 +46,7 @@
 #include <stdlib.h>
 #include <GL/glut.h>
 
-/*  Initialize z-buffer, projection matrix, light source, 
+/*  Initialize z-buffer, projection matrix, light source,
  *  and lighting model.  Do not specify a material property here.
  */
 void myinit(void)
@@ -72,7 +72,7 @@ void myinit(void)
     glClearColor(0.0, 0.1, 0.1, 0.0);
 }
 
-/*  Draw twelve spheres in 3 rows with 4 columns.  
+/*  Draw twelve spheres in 3 rows with 4 columns.
  *  The spheres in the first row have materials with no ambient reflection.
  *  The second row has materials with significant ambient reflection.
  *  The third row has materials with colored ambient reflection.
@@ -102,7 +102,7 @@ void display(void)
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
 /*  draw sphere in first row, first column
- *  diffuse reflection only; no ambient or specular  
+ *  diffuse reflection only; no ambient or specular
  */
     glPushMatrix();
     glTranslatef (-3.75, 3.0, 0.0);
@@ -154,7 +154,7 @@ void display(void)
     glPopMatrix();
 
 /*  draw sphere in second row, first column
- *  ambient and diffuse reflection; no specular  
+ *  ambient and diffuse reflection; no specular
  */
     glPushMatrix();
     glTranslatef (-3.75, 0.0, 0.0);
@@ -206,7 +206,7 @@ void display(void)
     glPopMatrix();
 
 /*  draw sphere in third row, first column
- *  colored ambient and diffuse reflection; no specular  
+ *  colored ambient and diffuse reflection; no specular
  */
     glPushMatrix();
     glTranslatef (-3.75, -3.0, 0.0);
@@ -266,16 +266,29 @@ void myReshape(int w, int h)
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     if (w <= (h * 2))
-	glOrtho (-6.0, 6.0, -3.0*((GLfloat)h*2)/(GLfloat)w, 
+	glOrtho (-6.0, 6.0, -3.0*((GLfloat)h*2)/(GLfloat)w,
 	    3.0*((GLfloat)h*2)/(GLfloat)w, -10.0, 10.0);
     else
-	glOrtho (-6.0*(GLfloat)w/((GLfloat)h*2), 
+	glOrtho (-6.0*(GLfloat)w/((GLfloat)h*2),
 	    6.0*(GLfloat)w/((GLfloat)h*2), -3.0, 3.0, -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)
@@ -287,7 +300,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc(myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }
-