diff options
Diffstat (limited to 'progs/demos/gears.c')
| -rw-r--r-- | progs/demos/gears.c | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/progs/demos/gears.c b/progs/demos/gears.c index 91f5eff024e..96e7de2a2b8 100644 --- a/progs/demos/gears.c +++ b/progs/demos/gears.c @@ -1,4 +1,4 @@ -/* $Id: gears.c,v 1.2 1999/10/21 16:39:06 brianp Exp $ */ +/* $Id: gears.c,v 1.3 2000/03/28 16:59:39 rjfrank Exp $ */ /* * 3-D gear wheels. This program is in the public domain. @@ -14,6 +14,9 @@ /* * $Log: gears.c,v $ + * Revision 1.3 2000/03/28 16:59:39 rjfrank + * Implemented support for the HP occlusion test extension (osmesa and X) + * * Revision 1.2 1999/10/21 16:39:06 brianp * added -info command line option * @@ -178,12 +181,14 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width, } static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0; -static GLint gear1, gear2, gear3; +static GLint gear1, gear2, gear3, gear3box; static GLfloat angle = 0.0; static void draw(void) { + GLboolean bRet = GL_TRUE; + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix(); @@ -206,7 +211,20 @@ draw(void) glPushMatrix(); glTranslatef(-3.1, 4.2, 0.0); glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0); - glCallList(gear3); + +#ifdef GL_HP_occlusion_test + glDepthMask(GL_FALSE); + glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE); + glEnable(GL_OCCLUSION_TEST_HP); + glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet); + glCallList(gear3box); + glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet); + glDepthMask(GL_TRUE); + glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE); + glDisable(GL_OCCLUSION_TEST_HP); +#endif + + if (bRet) glCallList(gear3); glPopMatrix(); glPopMatrix(); @@ -305,6 +323,16 @@ init(int argc, char *argv[]) {0.0, 0.8, 0.2, 1.0}; static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0}; + static float cube[8][3] = { + {-2.35,-2.35,-0.5}, + { 2.35,-2.35,-0.5}, + { 2.35, 2.35,-0.5}, + {-2.35, 2.35,-0.5}, + {-2.35,-2.35, 0.5}, + { 2.35,-2.35, 0.5}, + { 2.35, 2.35, 0.5}, + {-2.35, 2.35, 0.5}, + }; glLightfv(GL_LIGHT0, GL_POSITION, pos); glEnable(GL_CULL_FACE); @@ -331,6 +359,26 @@ init(int argc, char *argv[]) gear(1.3, 2.0, 0.5, 10, 0.7); glEndList(); + gear3box = glGenLists(1); + glNewList(gear3box, GL_COMPILE); + glDisable(GL_LIGHTING); + glBegin(GL_QUADS); + glVertex3fv(cube[3]); glVertex3fv(cube[2]); + glVertex3fv(cube[1]); glVertex3fv(cube[0]); + glVertex3fv(cube[4]); glVertex3fv(cube[5]); + glVertex3fv(cube[6]); glVertex3fv(cube[7]); + glVertex3fv(cube[0]); glVertex3fv(cube[1]); + glVertex3fv(cube[5]); glVertex3fv(cube[4]); + glVertex3fv(cube[1]); glVertex3fv(cube[2]); + glVertex3fv(cube[6]); glVertex3fv(cube[5]); + glVertex3fv(cube[2]); glVertex3fv(cube[3]); + glVertex3fv(cube[7]); glVertex3fv(cube[6]); + glVertex3fv(cube[3]); glVertex3fv(cube[0]); + glVertex3fv(cube[4]); glVertex3fv(cube[7]); + glEnd(); + glEnable(GL_LIGHTING); + glEndList(); + glEnable(GL_NORMALIZE); if (argc > 1 && strcmp(argv[1], "-info")==0) { |