progs/trivial/long-fixed-func.c

   1 /**
   2  * Enable as much fixed-function vertex processing state as possible
   3  * to test fixed-function -> program code generation.
   4  */
   5
   6
   7
   8 #include <GL/glew.h>
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include <GL/glut.h>
  13
  14
  15 static void
  16 Reshape(int width, int height)
  17 {
  18    glViewport(0, 0, (GLint)width, (GLint)height);
  19    glMatrixMode(GL_PROJECTION);
  20    glLoadIdentity();
  21    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
  22    glMatrixMode(GL_MODELVIEW);
  23 }
  24
  25
  26 static void
  27 Draw(void)
  28 {
  29    glClear(GL_COLOR_BUFFER_BIT);
  30
  31    glBegin(GL_TRIANGLES);
  32    glColor3f(.8,0,0);
  33    glVertex3f(-0.9, -0.9, -30.0);
  34    glColor3f(0,.9,0);
  35    glVertex3f( 0.9, -0.9, -30.0);
  36    glColor3f(0,0,.7);
  37    glVertex3f( 0.0,  0.9, -30.0);
  38    glEnd();
  39
  40    glFlush();
  41
  42    glutSwapBuffers();
  43 }
  44
  45
  46 static void
  47 Init(void)
  48 {
  49    GLubyte tex[16][16][4];
  50    GLfloat pos[4] = {5, 10, 3, 1.0};
  51    int i, j;
  52
  53    fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
  54    fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
  55    fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
  56    fflush(stderr);
  57
  58    glClearColor(0.3, 0.1, 0.3, 0.0);
  59
  60    for (i = 0; i < 16; i++) {
  61       for (j = 0; j < 16; j++) {
  62          if ((i+j) & 1) {
  63             tex[i][j][0] = 100;
  64             tex[i][j][1] = 100;
  65             tex[i][j][2] = 100;
  66             tex[i][j][3] = 255;
  67          }
  68          else {
  69             tex[i][j][0] = 200;
  70             tex[i][j][1] = 200;
  71             tex[i][j][2] = 200;
  72             tex[i][j][3] = 255;
  73          }
  74       }
  75    }
  76
  77
  78    glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
  79    glFogi(GL_FOG_MODE, GL_LINEAR);
  80    glEnable(GL_FOG);
  81
  82    glPointParameterfv(GL_DISTANCE_ATTENUATION_EXT, pos);
  83
  84    for (i = 0; i < 8; i++) {
  85       GLuint texObj;
  86
  87       glEnable(GL_LIGHT0 + i);
  88       glLightf(GL_LIGHT0 + i, GL_SPOT_EXPONENT, 3.5);
  89       glLightf(GL_LIGHT0 + i, GL_SPOT_CUTOFF, 30.);
  90       glLightf(GL_LIGHT0 + i, GL_CONSTANT_ATTENUATION, 3.);
  91       glLightf(GL_LIGHT0 + i, GL_LINEAR_ATTENUATION, 3.);
  92       glLightf(GL_LIGHT0 + i, GL_QUADRATIC_ATTENUATION, 3.);
  93       glLightfv(GL_LIGHT0 + i, GL_POSITION, pos);
  94
  95       glActiveTexture(GL_TEXTURE0 + i);
  96       glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
  97       glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
  98       glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
  99       glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
 100       glEnable(GL_TEXTURE_GEN_S);
 101       glEnable(GL_TEXTURE_GEN_T);
 102       glEnable(GL_TEXTURE_GEN_R);
 103       glEnable(GL_TEXTURE_GEN_Q);
 104       glEnable(GL_TEXTURE_2D);
 105
 106       glMatrixMode(GL_TEXTURE);
 107       glScalef(2.0, 1.0, 3.0);
 108
 109       glGenTextures(1, &texObj);
 110       glBindTexture(GL_TEXTURE_2D, texObj);
 111       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0,
 112                    GL_RGBA, GL_UNSIGNED_BYTE, tex);
 113       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 114       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 115       glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 116    }
 117
 118    glEnable(GL_LIGHTING);
 119    glActiveTexture(GL_TEXTURE0);
 120    glMatrixMode(GL_MODELVIEW);
 121 }
 122
 123
 124 static void
 125 Key(unsigned char key, int x, int y)
 126 {
 127    if (key == 27) {
 128       exit(0);
 129    }
 130    glutPostRedisplay();
 131 }
 132
 133
 134 int
 135 main(int argc, char **argv)
 136 {
 137     GLenum type = GLUT_RGB | GLUT_DOUBLE;
 138
 139     glutInit(&argc, argv);
 140     glutInitWindowPosition(0, 0);
 141     glutInitWindowSize( 250, 250);
 142     glutInitDisplayMode(type);
 143     if (glutCreateWindow(*argv) == GL_FALSE) {
 144        exit(1);
 145     }
 146     glewInit();
 147     glutReshapeFunc(Reshape);
 148     glutKeyboardFunc(Key);
 149     glutDisplayFunc(Draw);
 150     Init();
 151     glutMainLoop();
 152     return 0;
 153 }