progs/tests/arbvptest3.c

   1
   2 #include <assert.h>
   3 #include <string.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <math.h>
   7 #include <GL/glew.h>
   8 #include <GL/glut.h>
   9
  10 static float Zrot = 0.0;
  11
  12
  13 static void Display( void )
  14 {
  15    glClearColor(0.3, 0.3, 0.3, 1);
  16    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  17
  18    glEnable(GL_VERTEX_PROGRAM_ARB);
  19
  20    glLoadIdentity();
  21    glRotatef(Zrot, 0, 0, 1);
  22
  23    glPushMatrix();
  24
  25    glVertexAttrib3fARB(3, 1, 0.5, 0.25);
  26    glBegin(GL_TRIANGLES);
  27 #if 1
  28    glVertexAttrib3fARB(3, 1.0, 0.0, 0.0);
  29    glVertexAttrib2fARB(0, -0.5, -0.5);
  30    glVertexAttrib3fARB(3, 0.0, 1.0, 0.0);
  31    glVertexAttrib2fARB(0, 0.5, -0.5);
  32    glVertexAttrib3fARB(3, 0.0, 0.0, 1.0);
  33    glVertexAttrib2fARB(0, 0,  0.5);
  34 #else
  35    glVertex2f( -1, -1);
  36    glVertex2f( 1, -1);
  37    glVertex2f( 0,  1);
  38 #endif
  39    glEnd();
  40
  41    glPopMatrix();
  42
  43    glutSwapBuffers();
  44 }
  45
  46
  47 static void Reshape( int width, int height )
  48 {
  49    glViewport( 0, 0, width, height );
  50    glMatrixMode( GL_PROJECTION );
  51    glLoadIdentity();
  52    /*   glFrustum( -2.0, 2.0, -2.0, 2.0, 5.0, 25.0 );*/
  53    glOrtho(-2.0, 2.0, -2.0, 2.0, -2.0, 2.0 );
  54    glMatrixMode( GL_MODELVIEW );
  55    glLoadIdentity();
  56    /*glTranslatef( 0.0, 0.0, -15.0 );*/
  57 }
  58
  59
  60 static void Key( unsigned char key, int x, int y )
  61 {
  62    (void) x;
  63    (void) y;
  64    switch (key) {
  65       case 'z':
  66          Zrot -= 5.0;
  67          break;
  68       case 'Z':
  69          Zrot += 5.0;
  70          break;
  71       case 27:
  72          exit(0);
  73          break;
  74    }
  75    glutPostRedisplay();
  76 }
  77
  78
  79 static void Init( void )
  80 {
  81    GLint errno;
  82    GLuint prognum;
  83
  84    static const char *prog1 =
  85       "!!ARBvp1.0\n"
  86       "MOV  result.color, vertex.attrib[3];\n"
  87
  88       "DP4  result.position.x, vertex.position, state.matrix.modelview.row[0];\n"
  89       "DP4  result.position.y, vertex.position, state.matrix.modelview.row[1];\n"
  90       "DP4  result.position.z, vertex.position, state.matrix.modelview.row[2];\n"
  91       "DP4  result.position.w, vertex.position, state.matrix.modelview.row[3];\n"
  92       "END\n";
  93
  94    glGenProgramsARB(1, &prognum);
  95
  96    glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum);
  97    glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
  98                         strlen(prog1), (const GLubyte *) prog1);
  99
 100    assert(glIsProgramARB(prognum));
 101    errno = glGetError();
 102    printf("glGetError = %d\n", errno);
 103    if (errno != GL_NO_ERROR)
 104    {
 105       GLint errorpos;
 106
 107       glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
 108       printf("errorpos: %d\n", errorpos);
 109       printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB));
 110    }
 111 }
 112
 113
 114 int main( int argc, char *argv[] )
 115 {
 116    glutInit( &argc, argv );
 117    glutInitWindowPosition( 0, 0 );
 118    glutInitWindowSize( 250, 250 );
 119    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
 120    glutCreateWindow(argv[0]);
 121    glewInit();
 122    glutReshapeFunc( Reshape );
 123    glutKeyboardFunc( Key );
 124    glutDisplayFunc( Display );
 125    Init();
 126    glutMainLoop();
 127    return 0;
 128 }