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Diffstat (limited to 'progs/trivial/quad-offset-units.c')
-rw-r--r--progs/trivial/quad-offset-units.c158
1 files changed, 0 insertions, 158 deletions
diff --git a/progs/trivial/quad-offset-units.c b/progs/trivial/quad-offset-units.c
deleted file mode 100644
index 1ac2338692..0000000000
--- a/progs/trivial/quad-offset-units.c
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
- * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the name of
- * Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
- * ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <GL/glut.h>
-
-GLenum doubleBuffer;
-
-static void Init(void)
-{
- fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
- fflush(stderr);
-
- glClearColor(1.0, 1.0, 1.0, 0.0);
-}
-
-static void Reshape(int width, int height)
-{
- glViewport(0, 0, (GLint)width, (GLint)height);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(-1.2, 1.2, -1.2, 1.2, -0.5, 1000.0);
- glMatrixMode(GL_MODELVIEW);
-}
-
-static void Key(unsigned char key, int x, int y)
-{
- switch (key) {
- case 27:
- exit(1);
- default:
- break;
- }
-
- glutPostRedisplay();
-}
-
-static void quad( float half )
-{
- glBegin(GL_QUADS);
- glVertex3f( half/9.0, -half/9.0, -25.0 + half);
- glVertex3f( half/9.0, half/9.0, -25.0 + half);
- glVertex3f(-half/9.0, half/9.0, -25.0 - half);
- glVertex3f(-half/9.0, -half/9.0, -25.0 - half);
- glEnd();
-}
-
-static void Draw(void)
-{
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glEnable(GL_DEPTH_TEST);
-
- /* red: offset back */
- glEnable(GL_POLYGON_OFFSET_FILL);
- glPolygonOffset(0, 4);
- glColor3f(1,0,0);
- quad(9);
-
- /* black: no offset */
- glDisable(GL_POLYGON_OFFSET_FILL);
- glColor3f(0,0,0);
- quad(6);
-
- /* green: offset 0 (this should obscure the black quad) */
- glEnable(GL_POLYGON_OFFSET_FILL);
- glPolygonOffset(0, 0);
- glDepthFunc( GL_EQUAL );
- glColor3f(0,1,0);
- quad(6);
-
- /* blue: offset forward */
- glDepthFunc( GL_LESS );
- glPolygonOffset(0, -4);
- glColor3f(0,0,1);
- quad(3);
-
- glDisable(GL_POLYGON_OFFSET_FILL);
-
- glFlush();
-
- if (doubleBuffer) {
- glutSwapBuffers();
- }
-}
-
-static GLenum Args(int argc, char **argv)
-{
- GLint i;
-
- doubleBuffer = GL_FALSE;
-
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-sb") == 0) {
- doubleBuffer = GL_FALSE;
- } else if (strcmp(argv[i], "-db") == 0) {
- doubleBuffer = GL_TRUE;
- } else {
- fprintf(stderr, "%s (Bad option).\n", argv[i]);
- return GL_FALSE;
- }
- }
- return GL_TRUE;
-}
-
-int main(int argc, char **argv)
-{
- GLenum type;
-
- glutInit(&argc, argv);
-
- if (Args(argc, argv) == GL_FALSE) {
- exit(1);
- }
-
- glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
-
- type = GLUT_RGB | GLUT_ALPHA | GLUT_DEPTH;
- type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
- glutInitDisplayMode(type);
-
- if (glutCreateWindow(*argv) == GL_FALSE) {
- exit(1);
- }
-
- Init();
-
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutDisplayFunc(Draw);
- glutMainLoop();
- return 0;
-}