Added ESC key handling

1 files changed, 32 insertions, 18 deletions

diff --git a/progs/redbook/texturesurf.c b/progs/redbook/texturesurf.c
index 89cdbcc..0170070 100644
--- a/progs/redbook/texturesurf.c
+++ b/progs/redbook/texturesurf.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
@@ -47,17 +47,17 @@
 #include <math.h>
 
 GLfloat ctrlpoints[4][4][3] = {
-    {{ -1.5, -1.5, 4.0}, { -0.5, -1.5, 2.0}, 
-	{0.5, -1.5, -1.0}, {1.5, -1.5, 2.0}}, 
-    {{ -1.5, -0.5, 1.0}, { -0.5, -0.5, 3.0}, 
-	{0.5, -0.5, 0.0}, {1.5, -0.5, -1.0}}, 
-    {{ -1.5, 0.5, 4.0}, { -0.5, 0.5, 0.0}, 
-	{0.5, 0.5, 3.0}, {1.5, 0.5, 4.0}}, 
-    {{ -1.5, 1.5, -2.0}, { -0.5, 1.5, -2.0}, 
+    {{ -1.5, -1.5, 4.0}, { -0.5, -1.5, 2.0},
+	{0.5, -1.5, -1.0}, {1.5, -1.5, 2.0}},
+    {{ -1.5, -0.5, 1.0}, { -0.5, -0.5, 3.0},
+	{0.5, -0.5, 0.0}, {1.5, -0.5, -1.0}},
+    {{ -1.5, 0.5, 4.0}, { -0.5, 0.5, 0.0},
+	{0.5, 0.5, 3.0}, {1.5, 0.5, 4.0}},
+    {{ -1.5, 1.5, -2.0}, { -0.5, 1.5, -2.0},
 	{0.5, 1.5, 0.0}, {1.5, 1.5, -1.0}}
 };
 
-GLfloat texpts[2][2][2] = {{{0.0, 0.0}, {0.0, 1.0}}, 
+GLfloat texpts[2][2][2] = {{{0.0, 0.0}, {0.0, 1.0}},
 			{{1.0, 0.0}, {1.0, 1.0}}};
 
 void display(void)
@@ -76,7 +76,7 @@ void makeImage(void)
 {
     int i, j;
     float ti, tj;
-    
+
     for (i = 0; i < imageWidth; i++) {
 	ti = 2.0*3.14159265*i/imageWidth;
 	for (j = 0; j < imageHeight; j++) {
@@ -93,7 +93,7 @@ void myinit(void)
 {
     glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4,
 	    0, 1, 12, 4, &ctrlpoints[0][0][0]);
-    glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 
+    glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2,
 	    0, 1, 4, 2, &texpts[0][0][0]);
     glEnable(GL_MAP2_TEXTURE_COORD_2);
     glEnable(GL_MAP2_VERTEX_3);
@@ -118,16 +118,29 @@ void myReshape(int w, int h)
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     if (w <= h)
-	glOrtho(-4.0, 4.0, -4.0*(GLfloat)h/(GLfloat)w, 
+	glOrtho(-4.0, 4.0, -4.0*(GLfloat)h/(GLfloat)w,
 	    4.0*(GLfloat)h/(GLfloat)w, -4.0, 4.0);
     else
-	glOrtho(-4.0*(GLfloat)w/(GLfloat)h, 
+	glOrtho(-4.0*(GLfloat)w/(GLfloat)h,
 	    4.0*(GLfloat)w/(GLfloat)h, -4.0, 4.0, -4.0, 4.0);
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
     glRotatef(85.0, 1.0, 1.0, 1.0);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 int main(int argc, char** argv)
 {
     glutInit(&argc, argv);
@@ -136,6 +149,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }