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-rw-r--r--progs/demos/vao_demo.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/progs/demos/vao_demo.c b/progs/demos/vao_demo.c
new file mode 100644
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+++ b/progs/demos/vao_demo.c
@@ -0,0 +1,330 @@
+/*
+ * (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:
+ 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;
+}
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