progs/tests/vptest2.c

   1 /* Test vertex state program execution */
   2
   3 #include <assert.h>
   4 #include <string.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <math.h>
   8 #include <GL/glew.h>
   9 #include <GL/glut.h>
  10
  11
  12
  13 static void Display( void )
  14 {
  15    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  16    glPushMatrix();
  17    glutSolidCube(2.0);
  18    glPopMatrix();
  19    glutSwapBuffers();
  20 }
  21
  22
  23 static void Reshape( int width, int height )
  24 {
  25    glViewport( 0, 0, width, height );
  26    glMatrixMode( GL_PROJECTION );
  27    glLoadIdentity();
  28    glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
  29    glMatrixMode( GL_MODELVIEW );
  30    glLoadIdentity();
  31    glTranslatef( 0.0, 0.0, -15.0 );
  32 }
  33
  34
  35 static void Key( unsigned char key, int x, int y )
  36 {
  37    (void) x;
  38    (void) y;
  39    switch (key) {
  40       case 27:
  41          exit(0);
  42          break;
  43    }
  44    glutPostRedisplay();
  45 }
  46
  47
  48 static void Test1( void )
  49 {
  50    static const GLfloat p[4] = {9, 8, 7, 6};
  51    GLfloat q[4];
  52    /* test addition */
  53    static const char *prog =
  54       "!!VSP1.0\n"
  55       "MOV R0, c[0];\n"
  56       "MOV R1, c[1];\n"
  57       "ADD  c[2], R0, R1;\n"
  58       "END\n";
  59
  60    glLoadProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1,
  61                    strlen(prog),
  62                    (const GLubyte *) prog);
  63    assert(glIsProgramNV(1));
  64
  65    glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 0, 1, 2, 3, 4);
  66    glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 1, 10, 20, 30, 40);
  67
  68    glExecuteProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1, p);
  69
  70    glGetProgramParameterfvNV(GL_VERTEX_PROGRAM_NV, 2, GL_PROGRAM_PARAMETER_NV, q);
  71    printf("Result c[2] = %g %g %g %g  (should be 11 22 33 44)\n",
  72           q[0], q[1], q[2], q[3]);
  73 }
  74
  75
  76 static void Test2( void )
  77 {
  78    static const GLfloat p[4] = {9, 8, 7, 6};
  79    GLfloat q[4];
  80    /* test swizzling */
  81    static const char *prog =
  82       "!!VSP1.0\n"
  83       "MOV R0, c[0].wzyx;\n"
  84       "MOV R1, c[1].wzyx;\n"
  85       "ADD c[2], R0, R1;\n"
  86       "END\n";
  87
  88    glLoadProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1,
  89                    strlen(prog),
  90                    (const GLubyte *) prog);
  91    assert(glIsProgramNV(1));
  92
  93    glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 0, 1, 2, 3, 4);
  94    glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 1, 10, 20, 30, 40);
  95
  96    glExecuteProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1, p);
  97
  98    glGetProgramParameterfvNV(GL_VERTEX_PROGRAM_NV, 2, GL_PROGRAM_PARAMETER_NV, q);
  99    printf("Result c[2] = %g %g %g %g  (should be 44 33 22 11)\n",
 100           q[0], q[1], q[2], q[3]);
 101 }
 102
 103
 104 static void Test3( void )
 105 {
 106    static const GLfloat p[4] = {0, 0, 0, 0};
 107    GLfloat q[4];
 108    /* normalize vector */
 109    static const char *prog =
 110       "!!VSP1.0\n"
 111       "# c[0] = (nx,ny,nz)\n"
 112       "# R0.xyz = normalize(R1)\n"
 113       "# R0.w   = 1/sqrt(nx*nx + ny*ny + nz*nz)\n"
 114       "# c[2] = R0\n"
 115       "DP3 R0.w, c[0], c[0];\n"
 116       "RSQ R0.w, R0.w;\n"
 117       "MUL R0.xyz, c[0], R0.w;\n"
 118       "MOV c[2], R0;\n"
 119       "END\n";
 120
 121    glLoadProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1,
 122                    strlen(prog),
 123                    (const GLubyte *) prog);
 124    assert(glIsProgramNV(1));
 125
 126    glProgramParameter4fNV(GL_VERTEX_PROGRAM_NV, 0, 0, 10, 0, 0);
 127
 128    glExecuteProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 1, p);
 129
 130    glGetProgramParameterfvNV(GL_VERTEX_PROGRAM_NV, 2, GL_PROGRAM_PARAMETER_NV, q);
 131    printf("Result c[2] = %g %g %g %g  (should be 0, 1, 0, 0.1)\n",
 132           q[0], q[1], q[2], q[3]);
 133 }
 134
 135
 136 int main( int argc, char *argv[] )
 137 {
 138    glutInit( &argc, argv );
 139    glutInitWindowPosition( 0, 0 );
 140    glutInitWindowSize( 50, 50 );
 141    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
 142    glutCreateWindow(argv[0]);
 143    glewInit();
 144    glutReshapeFunc( Reshape );
 145    glutKeyboardFunc( Key );
 146    glutDisplayFunc( Display );
 147
 148    if (!glutExtensionSupported("GL_NV_vertex_program")) {
 149       printf("Sorry, this program requires GL_NV_vertex_program\n");
 150       exit(1);
 151    }
 152
 153    Test1();
 154    Test2();
 155    Test3();
 156    glutMainLoop();
 157    return 0;
 158 }