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authorTed Jump <tjump@users.sourceforge.net>1999-09-17 02:40:51 +0000
committerTed Jump <tjump@users.sourceforge.net>1999-09-17 02:40:51 +0000
commit83c02efa520eb2f8b3f5430be47bcd9c9749b30f (patch)
tree7e64e011d244460c4c7f3c6e177727249070c81e /progs/redbook/fog.c
parent74783e9936c59b8098f769061c6b216cad73edcf (diff)
Added ESC key handling
Diffstat (limited to 'progs/redbook/fog.c')
-rw-r--r--progs/redbook/fog.c52
1 files changed, 33 insertions, 19 deletions
diff --git a/progs/redbook/fog.c b/progs/redbook/fog.c
index 5f8a4e4e76..888ee138a4 100644
--- a/progs/redbook/fog.c
+++ b/progs/redbook/fog.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
@@ -39,11 +39,11 @@
*/
/*
* fog.c
- * This program draws 5 red teapots, each at a different
- * z distance from the eye, in different types of fog.
- * Pressing the left mouse button chooses between 3 types of
- * fog: exponential, exponential squared, and linear.
- * In this program, there is a fixed density value, as well
+ * This program draws 5 red teapots, each at a different
+ * z distance from the eye, in different types of fog.
+ * Pressing the left mouse button chooses between 3 types of
+ * fog: exponential, exponential squared, and linear.
+ * In this program, there is a fixed density value, as well
* as fixed start and end values for the linear fog.
*/
#include <stdlib.h>
@@ -52,7 +52,7 @@
GLint fogMode;
-void
+void
selectFog(int mode)
{
switch(mode) {
@@ -70,10 +70,10 @@ selectFog(int mode)
}
}
-/* 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
+void
myinit(void)
{
GLfloat position[] =
@@ -106,7 +106,7 @@ myinit(void)
}
}
-void
+void
renderRedTeapot(GLfloat x, GLfloat y, GLfloat z)
{
float mat[4];
@@ -133,7 +133,7 @@ renderRedTeapot(GLfloat x, GLfloat y, GLfloat z)
/* display() draws 5 teapots at different z positions.
*/
-void
+void
display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -145,7 +145,7 @@ display(void)
glFlush();
}
-void
+void
myReshape(int w, int h)
{
glViewport(0, 0, w, h);
@@ -161,11 +161,24 @@ myReshape(int w, int h)
glLoadIdentity();
}
+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, depth buffer, and handle input events.
*/
-int
+int
main(int argc, char **argv)
{
glutInit(&argc, argv);
@@ -181,6 +194,7 @@ main(int argc, char **argv)
glutAddMenuEntry("Fog LINEAR", GL_LINEAR);
glutAddMenuEntry("Quit", 0);
glutAttachMenu(GLUT_RIGHT_BUTTON);
+ glutKeyboardFunc(key);
glutMainLoop();
return 0; /* ANSI C requires main to return int. */
}