progs/trivial/vp-tri-cb-pos.c

   1 /* Test glGenProgramsNV(), glIsProgramNV(), glLoadProgramNV() */
   2
   3 #include <stdio.h>
   4 #include <assert.h>
   5 #include <string.h>
   6 #include <stdlib.h>
   7 #include <math.h>
   8 #include <GL/glew.h>
   9 #include <GL/glut.h>
  10
  11
  12
  13 GLenum doubleBuffer;
  14
  15 static void Init(void)
  16 {
  17    GLint errno;
  18    GLuint prognum;
  19
  20    static const char *prog1 =
  21       "!!ARBvp1.0\n"
  22       "PARAM Emission = state.material.emission; \n"
  23       "PARAM Ambient = state.material.ambient; \n"
  24       "PARAM Diffuse = state.material.diffuse; \n"
  25       "PARAM Specular = state.material.specular; \n"
  26       "DP4  result.position.x, Ambient, vertex.position;\n"
  27       "DP4  result.position.y, Diffuse, vertex.position;\n"
  28       "DP4  result.position.z, Specular, vertex.position;\n"
  29       "DP4  result.position.w, Emission, vertex.position;\n"
  30       "MOV  result.color, vertex.color;\n"
  31       "END\n";
  32
  33    const float Ambient[4] = { 0.0, 1.0, 0.0, 0.0 };
  34    const float Diffuse[4] = { 1.0, 0.0, 0.0, 0.0 };
  35    const float Specular[4] = { 0.0, 0.0, 1.0, 0.0 };
  36    const float Emission[4] = { 0.0, 0.0, 0.0, 1.0 };
  37    glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, Ambient);
  38    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, Diffuse);
  39    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, Specular);
  40    glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, Emission);
  41
  42
  43    glGenProgramsARB(1, &prognum);
  44
  45    glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum);
  46    glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
  47                       strlen(prog1), (const GLubyte *) prog1);
  48
  49    assert(glIsProgramARB(prognum));
  50    errno = glGetError();
  51    printf("glGetError = %d\n", errno);
  52    if (errno != GL_NO_ERROR)
  53    {
  54       GLint errorpos;
  55
  56       glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
  57       printf("errorpos: %d\n", errorpos);
  58       printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB));
  59    }
  60
  61    glEnable(GL_VERTEX_PROGRAM_NV);
  62
  63 }
  64
  65
  66 static void Reshape(int width, int height)
  67 {
  68
  69     glViewport(0, 0, (GLint)width, (GLint)height);
  70
  71     glMatrixMode(GL_PROJECTION);
  72     glLoadIdentity();
  73 /*     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
  74     glMatrixMode(GL_MODELVIEW);
  75 }
  76
  77 static void Key(unsigned char key, int x, int y)
  78 {
  79
  80     switch (key) {
  81       case 27:
  82         exit(1);
  83       default:
  84         break;
  85     }
  86
  87     glutPostRedisplay();
  88 }
  89
  90 static void Draw(void)
  91 {
  92    glClear(GL_COLOR_BUFFER_BIT);
  93
  94    glBegin(GL_TRIANGLES);
  95    glColor3f(0,0,.7);
  96    glVertex3f( 0.9, -0.9, -0.0);
  97    glColor3f(.8,0,0);
  98    glVertex3f( 0.9,  0.9, -0.0);
  99    glColor3f(0,.9,0);
 100    glVertex3f(-0.9,  0.0, -0.0);
 101    glEnd();
 102
 103    glFlush();
 104
 105    if (doubleBuffer) {
 106       glutSwapBuffers();
 107    }
 108 }
 109
 110 static GLenum Args(int argc, char **argv)
 111 {
 112     GLint i;
 113
 114     doubleBuffer = GL_FALSE;
 115
 116     for (i = 1; i < argc; i++) {
 117         if (strcmp(argv[i], "-sb") == 0) {
 118             doubleBuffer = GL_FALSE;
 119         } else if (strcmp(argv[i], "-db") == 0) {
 120             doubleBuffer = GL_TRUE;
 121         } else {
 122             fprintf(stderr, "%s (Bad option).\n", argv[i]);
 123             return GL_FALSE;
 124         }
 125     }
 126     return GL_TRUE;
 127 }
 128
 129 int main(int argc, char **argv)
 130 {
 131     GLenum type;
 132
 133     glutInit(&argc, argv);
 134
 135     if (Args(argc, argv) == GL_FALSE) {
 136         exit(1);
 137     }
 138
 139     glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
 140
 141     type = GLUT_RGB | GLUT_ALPHA;
 142     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
 143     glutInitDisplayMode(type);
 144
 145     if (glutCreateWindow(*argv) == GL_FALSE) {
 146         exit(1);
 147     }
 148
 149     glewInit();
 150
 151     Init();
 152
 153     glutReshapeFunc(Reshape);
 154     glutKeyboardFunc(Key);
 155     glutDisplayFunc(Draw);
 156     glutMainLoop();
 157     return 0;
 158 }