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author | Brian Paul <brianp@vmware.com> | 2009-04-18 13:10:51 -0600 |
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committer | Brian Paul <brianp@vmware.com> | 2009-04-18 13:10:51 -0600 |
commit | 30e80f6e559727dd157fbca4e7e537710e9ea199 (patch) | |
tree | 59c62feaf9a0fbf173b256f77405db00ce597a34 /progs/demos | |
parent | 22af013f85debd0030f2fb00061ce0412fdc0797 (diff) | |
download | external_mesa3d-30e80f6e559727dd157fbca4e7e537710e9ea199.zip external_mesa3d-30e80f6e559727dd157fbca4e7e537710e9ea199.tar.gz external_mesa3d-30e80f6e559727dd157fbca4e7e537710e9ea199.tar.bz2 |
demos: move demos/occlude.c (old HP extension) to tests
Diffstat (limited to 'progs/demos')
-rw-r--r-- | progs/demos/occlude.c | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/progs/demos/occlude.c b/progs/demos/occlude.c deleted file mode 100644 index 8f7b909..0000000 --- a/progs/demos/occlude.c +++ /dev/null @@ -1,234 +0,0 @@ -/* - * GL_HP_occlustion_test demo - * - * Brian Paul - * 31 March 2000 - * - * Copyright (C) 2000 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <math.h> -#include <GL/glut.h> -#include <GL/glext.h> - - -static GLfloat Xpos = 0; -static GLboolean Anim = GL_TRUE; - - -static void -PrintString(const char *s) -{ - while (*s) { - glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s); - s++; - } -} - - - -static void Idle(void) -{ - static int lastTime = 0; - static int sign = +1; - int time = glutGet(GLUT_ELAPSED_TIME); - float step; - - if (lastTime == 0) - lastTime = time; - else if (time - lastTime < 20) /* 50Hz update */ - return; - - step = (time - lastTime) / 1000.0 * sign; - lastTime = time; - - Xpos += step; - - if (Xpos > 2.5) { - Xpos = 2.5; - sign = -1; - } - else if (Xpos < -2.5) { - Xpos = -2.5; - sign = +1; - } - glutPostRedisplay(); -} - - -static void Display( void ) -{ - GLboolean result; - - glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); - - glMatrixMode( GL_PROJECTION ); - glLoadIdentity(); - glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 ); - glMatrixMode( GL_MODELVIEW ); - glLoadIdentity(); - glTranslatef( 0.0, 0.0, -15.0 ); - - /* draw the occluding polygons */ - glColor3f(0, 0.6, 0.8); - glBegin(GL_QUADS); - glVertex2f(-1.6, -1.5); - glVertex2f(-0.4, -1.5); - glVertex2f(-0.4, 1.5); - glVertex2f(-1.6, 1.5); - - glVertex2f( 0.4, -1.5); - glVertex2f( 1.6, -1.5); - glVertex2f( 1.6, 1.5); - glVertex2f( 0.4, 1.5); - glEnd(); - - /* draw the test polygon with occlusion testing */ - glPushMatrix(); - glTranslatef(Xpos, 0, -0.5); - glScalef(0.3, 0.3, 1.0); - glRotatef(-90.0 * Xpos, 0, 0, 1); - - glEnable(GL_OCCLUSION_TEST_HP); /* NOTE: enabling the occlusion test */ - /* doesn't clear the result flag! */ - glColorMask(0, 0, 0, 0); - glDepthMask(GL_FALSE); - /* this call clear's the result flag. Not really needed for this demo. */ - glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP, &result); - - glBegin(GL_POLYGON); - glVertex3f(-1, -1, 0); - glVertex3f( 1, -1, 0); - glVertex3f( 1, 1, 0); - glVertex3f(-1, 1, 0); - glEnd(); - - glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP, &result); - /* turn off occlusion testing */ - glDisable(GL_OCCLUSION_TEST_HP); - glColorMask(1, 1, 1, 1); - glDepthMask(GL_TRUE); - - /* draw the green rect, so we can see what's going on */ - glColor3f(0.8, 0.5, 0); - glBegin(GL_POLYGON); - glVertex3f(-1, -1, 0); - glVertex3f( 1, -1, 0); - glVertex3f( 1, 1, 0); - glVertex3f(-1, 1, 0); - glEnd(); - - glPopMatrix(); - - - /* Print result message */ - glMatrixMode( GL_PROJECTION ); - glLoadIdentity(); - glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 ); - glMatrixMode( GL_MODELVIEW ); - glLoadIdentity(); - - glColor3f(1, 1, 1); - glRasterPos3f(-0.25, -0.7, 0); - - if (result) - PrintString(" Visible"); - else - PrintString("Fully Occluded"); - - glutSwapBuffers(); -} - - -static void Reshape( int width, int height ) -{ - glViewport( 0, 0, width, height ); -} - - -static void Key( unsigned char key, int x, int y ) -{ - (void) x; - (void) y; - switch (key) { - case 'a': - Anim = !Anim; - if (Anim) - glutIdleFunc( Idle ); - else - glutIdleFunc( NULL ); - break; - case 27: - exit(0); - break; - } - glutPostRedisplay(); -} - - -static void SpecialKey( int key, int x, int y ) -{ - const GLfloat step = 0.1; - (void) x; - (void) y; - switch (key) { - case GLUT_KEY_LEFT: - Xpos -= step; - break; - case GLUT_KEY_RIGHT: - Xpos += step; - break; - } - glutPostRedisplay(); -} - - -static void Init( void ) -{ - const char *ext = (const char *) glGetString(GL_EXTENSIONS); - if (!strstr(ext, "GL_HP_occlusion_test")) { - printf("Sorry, this demo requires the GL_HP_occlusion_test extension\n"); - exit(-1); - } - - glEnable(GL_DEPTH_TEST); -} - - -int main( int argc, char *argv[] ) -{ - glutInit( &argc, argv ); - glutInitWindowPosition( 0, 0 ); - glutInitWindowSize( 400, 400 ); - glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH ); - glutCreateWindow(argv[0]); - glutReshapeFunc( Reshape ); - glutKeyboardFunc( Key ); - glutSpecialFunc( SpecialKey ); - glutIdleFunc( Idle ); - glutDisplayFunc( Display ); - Init(); - glutMainLoop(); - return 0; -} |