1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
|
/*
* (C) Copyright IBM Corporation 2006
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 (including the next
* paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* IBM AND/OR THEIR SUPPLIERS 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 <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#ifdef __darwin__
#include <GLUT/glut.h>
typedef void (* PFNGLBINDVERTEXARRAYAPPLEPROC) (GLuint array);
typedef void (* PFNGLDELETEVERTEXARRAYSAPPLEPROC) (GLsizei n, const GLuint *arrays);
typedef void (* PFNGLGENVERTEXARRAYSAPPLEPROC) (GLsizei n, const GLuint *arrays);
typedef GLboolean (* PFNGLISVERTEXARRAYAPPLEPROC) (GLuint array);
#else
#include <GL/glut.h>
#endif
static PFNGLBINDVERTEXARRAYAPPLEPROC bind_vertex_array = NULL;
static PFNGLGENVERTEXARRAYSAPPLEPROC gen_vertex_arrays = NULL;
static PFNGLDELETEVERTEXARRAYSAPPLEPROC delete_vertex_arrays = NULL;
static PFNGLISVERTEXARRAYAPPLEPROC is_vertex_array = NULL;
static int Width = 400;
static int Height = 200;
static int Win = 0;
static const GLfloat Near = 5.0, Far = 25.0;
static GLfloat angle = 0.0;
static GLuint cube_array_obj = 0;
static GLuint oct_array_obj = 0;
static const GLfloat cube_vert[] = {
-0.5, -0.5, -0.5, 1.0,
0.5, -0.5, -0.5, 1.0,
0.5, 0.5, -0.5, 1.0,
-0.5, 0.5, -0.5, 1.0,
-0.5, -0.5, 0.5, 1.0,
0.5, -0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
-0.5, 0.5, 0.5, 1.0,
-0.5, 0.5, -0.5, 1.0,
0.5, 0.5, -0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
-0.5, 0.5, 0.5, 1.0,
-0.5, -0.5, -0.5, 1.0,
0.5, -0.5, -0.5, 1.0,
0.5, -0.5, 0.5, 1.0,
-0.5, -0.5, 0.5, 1.0,
0.5, -0.5, -0.5, 1.0,
0.5, -0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
0.5, 0.5, -0.5, 1.0,
-0.5, -0.5, -0.5, 1.0,
-0.5, -0.5, 0.5, 1.0,
-0.5, 0.5, 0.5, 1.0,
-0.5, 0.5, -0.5, 1.0,
};
static const GLfloat cube_color[] = {
1.0, 0.0, 0.0, 1.0,
1.0, 0.0, 0.0, 1.0,
1.0, 0.0, 0.0, 1.0,
1.0, 0.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
0.5, 0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
};
static const GLfloat oct_vert[] = {
0.0, 0.0, 0.7071, 1.0,
0.5, 0.5, 0.0, 1.0,
-0.5, 0.5, 0.0, 1.0,
0.0, 0.0, 0.7071, 1.0,
0.5, -0.5, 0.0, 1.0,
-0.5, -0.5, 0.0, 1.0,
0.0, 0.0, 0.7071, 1.0,
-0.5, -0.5, 0.0, 1.0,
-0.5, 0.5, 0.0, 1.0,
0.0, 0.0, 0.7071, 1.0,
0.5, 0.5, 0.0, 1.0,
0.5, -0.5, 0.0, 1.0,
0.0, 0.0, -0.7071, 1.0,
0.5, 0.5, 0.0, 1.0,
-0.5, 0.5, 0.0, 1.0,
0.0, 0.0, -0.7071, 1.0,
0.5, -0.5, 0.0, 1.0,
-0.5, -0.5, 0.0, 1.0,
0.0, 0.0, -0.7071, 1.0,
-0.5, -0.5, 0.0, 1.0,
-0.5, 0.5, 0.0, 1.0,
0.0, 0.0, -0.7071, 1.0,
0.5, 0.5, 0.0, 1.0,
0.5, -0.5, 0.0, 1.0,
};
static const GLfloat oct_color[] = {
1.0, 0.64, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
};
static void Display( void )
{
glClearColor(0.1, 0.1, 0.4, 0);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glTranslatef( 0.0, 0.0, -15.0 );
glRotatef( angle, 0.0 * angle , 0.0 * angle, 1.0 );
(*bind_vertex_array)( cube_array_obj );
glPushMatrix();
glTranslatef(-1.5, 0, 0);
glRotatef( angle, 0.3 * angle , 0.8 * angle, 1.0 );
glDrawArrays( GL_QUADS, 0, 4 * 6 );
glPopMatrix();
(*bind_vertex_array)( oct_array_obj );
glPushMatrix();
glTranslatef(1.5, 0, 0);
glRotatef( angle, 0.3 * angle , 0.8 * angle, 1.0 );
glDrawArrays( GL_TRIANGLES, 0, 3 * 8 );
glPopMatrix();
glutSwapBuffers();
}
static void Idle( void )
{
static double t0 = -1.;
double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
if (t0 < 0.0)
t0 = t;
dt = t - t0;
t0 = t;
angle += 70.0 * dt; /* 70 degrees per second */
angle = fmod(angle, 360.0); /* prevents eventual overflow */
glutPostRedisplay();
}
static void Visible( int vis )
{
if ( vis == GLUT_VISIBLE ) {
glutIdleFunc( Idle );
}
else {
glutIdleFunc( NULL );
}
}
static void Reshape( int width, int height )
{
GLfloat ar = (float) width / (float) height;
Width = width;
Height = height;
glViewport( 0, 0, width, height );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glFrustum( -ar, ar, -1.0, 1.0, Near, Far );
}
static void Key( unsigned char key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case 27:
(*delete_vertex_arrays)( 1, & cube_array_obj );
(*delete_vertex_arrays)( 1, & oct_array_obj );
glutDestroyWindow(Win);
exit(0);
break;
}
glutPostRedisplay();
}
static void Init( void )
{
const char * const ver_string = (const char * const)
glGetString( GL_VERSION );
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n", ver_string);
if ( !glutExtensionSupported("GL_APPLE_vertex_array_object") ) {
printf("Sorry, this program requires GL_APPLE_vertex_array_object\n");
exit(1);
}
bind_vertex_array = (PFNGLBINDVERTEXARRAYAPPLEPROC) glutGetProcAddress( "glBindVertexArrayAPPLE" );
gen_vertex_arrays = (PFNGLGENVERTEXARRAYSAPPLEPROC) glutGetProcAddress( "glGenVertexArraysAPPLE" );
delete_vertex_arrays = (PFNGLDELETEVERTEXARRAYSAPPLEPROC) glutGetProcAddress( "glDeleteVertexArraysAPPLE" );
is_vertex_array = (PFNGLISVERTEXARRAYAPPLEPROC) glutGetProcAddress( "glIsVertexArrayAPPLE" );
assert(bind_vertex_array);
assert(gen_vertex_arrays);
assert(delete_vertex_arrays);
assert(is_vertex_array);
glEnable( GL_DEPTH_TEST );
(*gen_vertex_arrays)( 1, & cube_array_obj );
(*bind_vertex_array)( cube_array_obj );
glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, cube_vert);
glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, cube_color);
glEnableClientState( GL_VERTEX_ARRAY );
glEnableClientState( GL_COLOR_ARRAY );
(*gen_vertex_arrays)( 1, & oct_array_obj );
(*bind_vertex_array)( oct_array_obj );
glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, oct_vert);
glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, oct_color);
glEnableClientState( GL_VERTEX_ARRAY );
glEnableClientState( GL_COLOR_ARRAY );
(*bind_vertex_array)( 0 );
glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xDEADBEEF );
glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xBADDC0DE );
}
int main( int argc, char *argv[] )
{
glutInit( &argc, argv );
glutInitWindowPosition( 0, 0 );
glutInitWindowSize( Width, Height );
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
Win = glutCreateWindow( "GL_APPLE_vertex_array_object demo" );
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutDisplayFunc( Display );
glutVisibilityFunc( Visible );
Init();
glutMainLoop();
return 0;
}
|
