2 * (C) Copyright IBM Corporation 2006
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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22 * DEALINGS IN THE SOFTWARE.
31 #include <GLUT/glut.h>
33 typedef void (* PFNGLBINDVERTEXARRAYAPPLEPROC) (GLuint array);
34 typedef void (* PFNGLDELETEVERTEXARRAYSAPPLEPROC) (GLsizei n, const GLuint *arrays);
35 typedef void (* PFNGLGENVERTEXARRAYSAPPLEPROC) (GLsizei n, const GLuint *arrays);
36 typedef GLboolean (* PFNGLISVERTEXARRAYAPPLEPROC) (GLuint array);
42 static PFNGLBINDVERTEXARRAYAPPLEPROC bind_vertex_array = NULL;
43 static PFNGLGENVERTEXARRAYSAPPLEPROC gen_vertex_arrays = NULL;
44 static PFNGLDELETEVERTEXARRAYSAPPLEPROC delete_vertex_arrays = NULL;
45 static PFNGLISVERTEXARRAYAPPLEPROC is_vertex_array = NULL;
47 static int Width = 400;
48 static int Height = 200;
50 static const GLfloat Near = 5.0, Far = 25.0;
51 static GLfloat angle = 0.0;
53 static GLuint cube_array_obj = 0;
54 static GLuint oct_array_obj = 0;
56 static const GLfloat cube_vert[] = {
57 -0.5, -0.5, -0.5, 1.0,
72 -0.5, -0.5, -0.5, 1.0,
82 -0.5, -0.5, -0.5, 1.0,
89 static const GLfloat cube_color[] = {
121 static const GLfloat oct_vert[] = {
122 0.0, 0.0, 0.7071, 1.0,
126 0.0, 0.0, 0.7071, 1.0,
128 -0.5, -0.5, 0.0, 1.0,
130 0.0, 0.0, 0.7071, 1.0,
131 -0.5, -0.5, 0.0, 1.0,
134 0.0, 0.0, 0.7071, 1.0,
139 0.0, 0.0, -0.7071, 1.0,
143 0.0, 0.0, -0.7071, 1.0,
145 -0.5, -0.5, 0.0, 1.0,
147 0.0, 0.0, -0.7071, 1.0,
148 -0.5, -0.5, 0.0, 1.0,
151 0.0, 0.0, -0.7071, 1.0,
156 static const GLfloat oct_color[] = {
190 static void Display( void )
192 glClearColor(0.1, 0.1, 0.4, 0);
193 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
195 glMatrixMode( GL_MODELVIEW );
197 glTranslatef( 0.0, 0.0, -15.0 );
198 glRotatef( angle, 0.0 * angle , 0.0 * angle, 1.0 );
201 (*bind_vertex_array)( cube_array_obj );
203 glTranslatef(-1.5, 0, 0);
204 glRotatef( angle, 0.3 * angle , 0.8 * angle, 1.0 );
205 glDrawArrays( GL_QUADS, 0, 4 * 6 );
209 (*bind_vertex_array)( oct_array_obj );
211 glTranslatef(1.5, 0, 0);
212 glRotatef( angle, 0.3 * angle , 0.8 * angle, 1.0 );
213 glDrawArrays( GL_TRIANGLES, 0, 3 * 8 );
220 static void Idle( void )
222 static double t0 = -1.;
223 double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
229 angle += 70.0 * dt; /* 70 degrees per second */
230 angle = fmod(angle, 360.0); /* prevents eventual overflow */
236 static void Visible( int vis )
238 if ( vis == GLUT_VISIBLE ) {
239 glutIdleFunc( Idle );
242 glutIdleFunc( NULL );
245 static void Reshape( int width, int height )
247 GLfloat ar = (float) width / (float) height;
250 glViewport( 0, 0, width, height );
251 glMatrixMode( GL_PROJECTION );
253 glFrustum( -ar, ar, -1.0, 1.0, Near, Far );
257 static void Key( unsigned char key, int x, int y )
263 glutDestroyWindow(Win);
271 static void Init( void )
273 const char * const ver_string = (const char * const)
274 glGetString( GL_VERSION );
276 printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
277 printf("GL_VERSION = %s\n", ver_string);
279 if ( !glutExtensionSupported("GL_APPLE_vertex_array_object") ) {
280 printf("Sorry, this program requires GL_APPLE_vertex_array_object\n");
284 bind_vertex_array = (PFNGLBINDVERTEXARRAYAPPLEPROC) glutGetProcAddress( "glBindVertexArrayAPPLE" );
285 gen_vertex_arrays = (PFNGLGENVERTEXARRAYSAPPLEPROC) glutGetProcAddress( "glGenVertexArraysAPPLE" );
286 delete_vertex_arrays = (PFNGLDELETEVERTEXARRAYSAPPLEPROC) glutGetProcAddress( "glDeleteVertexArraysAPPLE" );
287 is_vertex_array = (PFNGLISVERTEXARRAYAPPLEPROC) glutGetProcAddress( "glIsVertexArrayAPPLE" );
289 assert(bind_vertex_array);
290 assert(gen_vertex_arrays);
291 assert(delete_vertex_arrays);
292 assert(is_vertex_array);
294 glEnable( GL_DEPTH_TEST );
296 (*gen_vertex_arrays)( 1, & cube_array_obj );
297 (*bind_vertex_array)( cube_array_obj );
298 glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, cube_vert);
299 glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, cube_color);
300 glEnableClientState( GL_VERTEX_ARRAY );
301 glEnableClientState( GL_COLOR_ARRAY );
303 (*gen_vertex_arrays)( 1, & oct_array_obj );
304 (*bind_vertex_array)( oct_array_obj );
305 glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, oct_vert);
306 glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, oct_color);
307 glEnableClientState( GL_VERTEX_ARRAY );
308 glEnableClientState( GL_COLOR_ARRAY );
310 (*bind_vertex_array)( 0 );
311 glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xDEADBEEF );
312 glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xBADDC0DE );
316 int main( int argc, char *argv[] )
318 glutInit( &argc, argv );
319 glutInitWindowPosition( 0, 0 );
320 glutInitWindowSize( Width, Height );
321 glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
322 Win = glutCreateWindow( "GL_APPLE_vertex_array_object demo" );
323 glutReshapeFunc( Reshape );
324 glutKeyboardFunc( Key );
325 glutDisplayFunc( Display );
326 glutVisibilityFunc( Visible );