git.mutantstargoat.com Git - freeglut/blob - progs/demos/shapes/shapes.c

   1 #include <GL/freeglut.h>
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <math.h>
   6
   7 static int slices = 16;
   8 static int stacks = 16;
   9
  10 static void
  11 reshape(int width, int height)
  12 {
  13         float ar;
  14
  15         glViewport( 0, 0, width, height);
  16         glMatrixMode(GL_PROJECTION);
  17         glLoadIdentity();
  18         ar = (float) width / (float) height;
  19         glFrustum ( -ar, ar, -1.0, 1.0, 2.0, 100.0);
  20
  21         glMatrixMode(GL_MODELVIEW) ;
  22         glLoadIdentity() ;
  23 }
  24
  25 static void
  26 display(void)
  27 {
  28         float t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
  29         float a = t*90.0;
  30
  31         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  32
  33         glPushMatrix();
  34                 glTranslatef(-2.4,1.2,-6);
  35                 glRotatef(60,1,0,0);
  36                 glRotatef(a,0,0,1);
  37                 glColor3f(1,0,0);
  38                 glutSolidSphere(1,slices,stacks);
  39         glPopMatrix();
  40
  41         glPushMatrix();
  42                 glTranslatef(0,1.2,-6);
  43                 glRotatef(60,1,0,0);
  44                 glRotatef(a,0,0,1);
  45                 glColor3f(1,0,0);
  46                 glutSolidCone(1,1,slices,stacks);
  47         glPopMatrix();
  48
  49         glPushMatrix();
  50                 glTranslatef(2.4,1.2,-6);
  51                 glRotatef(60,1,0,0);
  52                 glRotatef(a,0,0,1);
  53                 glColor3f(1,0,0);
  54                 glutSolidTorus(0.2,0.8,slices,stacks);
  55         glPopMatrix();
  56
  57         glPushMatrix();
  58                 glTranslatef(-2.4,-1.2,-6);
  59                 glRotatef(60,1,0,0);
  60                 glRotatef(a,0,0,1);
  61                 glColor3f(1,0,0);
  62                 glutWireSphere(1,slices,stacks);
  63         glPopMatrix();
  64
  65         glPushMatrix();
  66                 glTranslatef(0,-1.2,-6);
  67                 glRotatef(60,1,0,0);
  68                 glRotatef(a,0,0,1);
  69                 glColor3f(1,0,0);
  70                 glutWireCone(1,1,slices,stacks);
  71         glPopMatrix();
  72
  73         glPushMatrix();
  74                 glTranslatef(2.4,-1.2,-6);
  75                 glRotatef(60,1,0,0);
  76                 glRotatef(a,0,0,1);
  77                 glColor3f(1,0,0);
  78                 glutWireTorus(0.2,0.8,slices,stacks);
  79         glPopMatrix();
  80
  81         glutSwapBuffers();
  82 }
  83
  84
  85 static void
  86 key(unsigned char key, int x, int y)
  87 {
  88         switch (key) {
  89                 case 27 :
  90                 case 'q':
  91                 exit(0);
  92                 break;
  93
  94          case '+':
  95                 slices++;
  96                 stacks++;
  97                 break;
  98
  99          case '-':
 100                 slices--;
 101                 stacks--;
 102                 break;
 103         }
 104
 105         glutPostRedisplay();
 106 }
 107
 108 void
 109 idle()
 110 {
 111         glutPostRedisplay();
 112 }
 113
 114 GLfloat light_ambient[]  = { 0.0, 0.0, 0.0, 1.0 };
 115 GLfloat light_diffuse[]  = { 1.0, 1.0, 1.0, 1.0 };
 116 GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
 117 GLfloat light_position[] = { 2.0, 5.0, 5.0, 0.0 };
 118
 119 GLfloat mat_ambient[]    = { 0.7, 0.7, 0.7, 1.0 };
 120 GLfloat mat_diffuse[]    = { 0.8, 0.8, 0.8, 1.0 };
 121 GLfloat mat_specular[]   = { 1.0, 1.0, 1.0, 1.0 };
 122 GLfloat high_shininess[] = { 100.0 };
 123
 124 int
 125 main(int argc, char *argv[])
 126 {
 127         glutInit(&argc, argv);
 128         glutInitWindowSize(640,480);
 129         glutInitWindowPosition (40,40);
 130         glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
 131
 132         glutCreateWindow("FreeGLUT Shapes");
 133
 134         glutReshapeFunc(reshape);
 135         glutDisplayFunc(display);
 136         glutKeyboardFunc(key);
 137         glutIdleFunc(idle);
 138
 139         glClearColor(1,1,1,1);
 140         glEnable(GL_CULL_FACE);
 141     glCullFace(GL_BACK);
 142
 143     glEnable(GL_DEPTH_TEST);
 144     glDepthFunc(GL_LESS);
 145
 146     glEnable(GL_LIGHT0);
 147     glEnable(GL_NORMALIZE);
 148     glEnable(GL_COLOR_MATERIAL);
 149         glEnable(GL_LIGHTING);
 150
 151     glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
 152     glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
 153     glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
 154     glLightfv(GL_LIGHT0, GL_POSITION, light_position);
 155
 156     glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
 157     glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
 158     glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
 159     glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
 160
 161         glutMainLoop();
 162
 163         return EXIT_SUCCESS;
 164 }