diff options
Diffstat (limited to 'progs/trivial/tri-stencil.c')
-rw-r--r-- | progs/trivial/tri-stencil.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/progs/trivial/tri-stencil.c b/progs/trivial/tri-stencil.c deleted file mode 100644 index d66b68c415a..00000000000 --- a/progs/trivial/tri-stencil.c +++ /dev/null @@ -1,161 +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 <stdlib.h> -#include <string.h> -#include <math.h> -#include <GL/glut.h> - - -static void Init(void) -{ -} - -static void Reshape(int width, int height) -{ - - glViewport(0, 0, (GLint)width, (GLint)height); - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho(-5.0, 5.0, -5.0, 5.0, -5.0, 5.0); - glMatrixMode(GL_MODELVIEW); -} - -static void Key(unsigned char key, int x, int y) -{ - - switch (key) { - case 27: - printf("Exiting...\n"); - exit(1); - case 'r': - printf("Redisplaying...\n"); - glutPostRedisplay(); - break; - default: - printf("No such key '%c'...\n", key); - break; - } -} - -static void Draw(void) -{ - glShadeModel(GL_FLAT); - - { - glClearColor(0.0, 0.0, 0.0, 0.0); - glClearStencil(0); - glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT); - } - - - glStencilMask(1); - glEnable(GL_STENCIL_TEST); - glStencilFunc(GL_ALWAYS, 1, 1); - glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE); - - /* red triangle (setting stencil to 1) */ - glColor3ub(200, 0, 0); - glBegin(GL_POLYGON); - glVertex3i(-4, -4, 0); - glVertex3i( 4, -4, 0); - glVertex3i( 0, 4, 0); - glEnd(); - -#if 1 - glStencilFunc(GL_EQUAL, 1, 1); - glStencilOp(GL_INCR, GL_KEEP, GL_DECR); - - /* green quad (if over red, decr stencil to 0, else incr to 1) */ - glColor3ub(0, 200, 0); - glBegin(GL_POLYGON); - glVertex3i(3, 3, 0); - glVertex3i(-3, 3, 0); - glVertex3i(-3, -3, 0); - glVertex3i(3, -3, 0); - glEnd(); -#endif - -#if 1 - glStencilFunc(GL_EQUAL, 1, 1); - glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); - - /* blue quad (where stencil == 1) */ - glColor3ub(0, 0, 200); - glBegin(GL_POLYGON); - glVertex3f(2.5, 2.5, 0); - glVertex3f(-2.5, 2.5, 0); - glVertex3f(-2.5, -2.5, 0); - glVertex3f(2.5, -2.5, 0); - glEnd(); -#endif - - glFlush(); -} - -static GLenum Args(int argc, char **argv) -{ - GLint i; - - - for (i = 1; i < argc; i++) { - if (strcmp(argv[i], "-dr") == 0) { - } else { - printf("%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( 300, 300); - - type = GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH | GLUT_STENCIL; - glutInitDisplayMode(type); - - if (glutCreateWindow(*argv) == GL_FALSE) { - exit(1); - } - - Init(); - - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutDisplayFunc(Draw); - glutMainLoop(); - return 0; -} |