progs/trivial/vp-tri-cb.c

   1 /* Test glGenProgramsNV(), glIsProgramNV(), glLoadProgramNV() */
   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 static void Init( void )
  12 {
  13    GLint errno;
  14    GLuint prognum;
  15
  16    static const char *prog1 =
  17       "!!ARBvp1.0\n"
  18       "PARAM Diffuse = state.material.diffuse; \n"
  19       "MOV  result.color, Diffuse;\n"
  20       "MOV  result.position, vertex.position;\n"
  21       "END\n";
  22
  23    const float Diffuse[4] = { 0.0, 1.0, 0.0, 1.0 };
  24    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, Diffuse);
  25
  26
  27    glGenProgramsARB(1, &prognum);
  28
  29    glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum);
  30    glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
  31                       strlen(prog1), (const GLubyte *) prog1);
  32
  33    assert(glIsProgramARB(prognum));
  34    errno = glGetError();
  35    printf("glGetError = %d\n", errno);
  36    if (errno != GL_NO_ERROR)
  37    {
  38       GLint errorpos;
  39
  40       glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
  41       printf("errorpos: %d\n", errorpos);
  42       printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB));
  43    }
  44 }
  45
  46 static void Display( void )
  47 {
  48    glClearColor(0.3, 0.3, 0.3, 1);
  49    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  50
  51    glEnable(GL_VERTEX_PROGRAM_NV);
  52
  53    glBegin(GL_TRIANGLES);
  54    glColor3f(0,0,.7);
  55    glVertex3f( 0.9, -0.9, -0.0);
  56    glColor3f(.8,0,0);
  57    glVertex3f( 0.9,  0.9, -0.0);
  58    glColor3f(0,.9,0);
  59    glVertex3f(-0.9,  0.0, -0.0);
  60    glEnd();
  61
  62
  63    glFlush();
  64 }
  65
  66
  67 static void Reshape( int width, int height )
  68 {
  69    glViewport( 0, 0, width, height );
  70    glMatrixMode( GL_PROJECTION );
  71    glLoadIdentity();
  72    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
  73    glMatrixMode( GL_MODELVIEW );
  74    glLoadIdentity();
  75    /*glTranslatef( 0.0, 0.0, -15.0 );*/
  76 }
  77
  78
  79 static void Key( unsigned char key, int x, int y )
  80 {
  81    (void) x;
  82    (void) y;
  83    switch (key) {
  84       case 27:
  85          exit(0);
  86          break;
  87    }
  88    glutPostRedisplay();
  89 }
  90
  91
  92
  93
  94 int main( int argc, char *argv[] )
  95 {
  96    glutInit( &argc, argv );
  97    glutInitWindowPosition( 0, 0 );
  98    glutInitWindowSize( 250, 250 );
  99    glutInitDisplayMode( GLUT_DEPTH | GLUT_RGB | GLUT_SINGLE );
 100    glutCreateWindow(argv[0]);
 101    glewInit();
 102    glutReshapeFunc( Reshape );
 103    glutKeyboardFunc( Key );
 104    glutDisplayFunc( Display );
 105    Init();
 106    glutMainLoop();
 107    return 0;
 108 }