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/* Test vertex state program execution */
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <GL/glew.h>
#include <GL/glut.h>
static void Display( void )
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glPushMatrix();
glutSolidCube(2.0);
glPopMatrix();
glutSwapBuffers();
}
static void Reshape( int width, int height )
{
glViewport( 0, 0, width, height );
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 );
}
static void Key( unsigned char key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case 27:
exit(0);
break;
}
glutPostRedisplay();
}
static void Test1( void )
{
static const GLfloat p[4] = {9, 8, 7, 6};
GLfloat q[4];
/* test addition */
static const char *prog =
"!!VSP1.0\n"
"MOV R0, c[0];\n"
"MOV R1, c[1];\n"
"ADD c[2], R0, R1;\n"
"END\n";
glLoadProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1,
strlen(prog),
(const GLubyte *) prog);
assert(glIsProgramNV(1));
glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 0, 1, 2, 3, 4);
glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 1, 10, 20, 30, 40);
glExecuteProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1, p);
glGetProgramParameterfvNV(GL_VERTEX_PROGRAM_NV, 2, GL_PROGRAM_PARAMETER_NV, q);
printf("Result c[2] = %g %g %g %g (should be 11 22 33 44)\n",
q[0], q[1], q[2], q[3]);
}
static void Test2( void )
{
static const GLfloat p[4] = {9, 8, 7, 6};
GLfloat q[4];
/* test swizzling */
static const char *prog =
"!!VSP1.0\n"
"MOV R0, c[0].wzyx;\n"
"MOV R1, c[1].wzyx;\n"
"ADD c[2], R0, R1;\n"
"END\n";
glLoadProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1,
strlen(prog),
(const GLubyte *) prog);
assert(glIsProgramNV(1));
glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 0, 1, 2, 3, 4);
glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 1, 10, 20, 30, 40);
glExecuteProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1, p);
glGetProgramParameterfvNV(GL_VERTEX_PROGRAM_NV, 2, GL_PROGRAM_PARAMETER_NV, q);
printf("Result c[2] = %g %g %g %g (should be 44 33 22 11)\n",
q[0], q[1], q[2], q[3]);
}
static void Test3( void )
{
static const GLfloat p[4] = {0, 0, 0, 0};
GLfloat q[4];
/* normalize vector */
static const char *prog =
"!!VSP1.0\n"
"# c[0] = (nx,ny,nz)\n"
"# R0.xyz = normalize(R1)\n"
"# R0.w = 1/sqrt(nx*nx + ny*ny + nz*nz)\n"
"# c[2] = R0\n"
"DP3 R0.w, c[0], c[0];\n"
"RSQ R0.w, R0.w;\n"
"MUL R0.xyz, c[0], R0.w;\n"
"MOV c[2], R0;\n"
"END\n";
glLoadProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1,
strlen(prog),
(const GLubyte *) prog);
assert(glIsProgramNV(1));
glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 0, 0, 10, 0, 0);
glExecuteProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1, p);
glGetProgramParameterfvNV(GL_VERTEX_PROGRAM_NV, 2, GL_PROGRAM_PARAMETER_NV, q);
printf("Result c[2] = %g %g %g %g (should be 0, 1, 0, 0.1)\n",
q[0], q[1], q[2], q[3]);
}
int main( int argc, char *argv[] )
{
glutInit( &argc, argv );
glutInitWindowPosition( 0, 0 );
glutInitWindowSize( 50, 50 );
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
glutCreateWindow(argv[0]);
glewInit();
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutDisplayFunc( Display );
if (!glutExtensionSupported("GL_NV_vertex_program")) {
printf("Sorry, this program requires GL_NV_vertex_program\n");
exit(1);
}
Test1();
Test2();
Test3();
glutMainLoop();
return 0;
}
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