Yurttas/PL/OOL/Cplusplus/oldies/f/swhsu/swhsu/opengl/codehtml/polys.html

CPSC332
Programming Language:
OpenGL Programming Guide

/*
 *  polys.c
 *  This program demonstrates polygon stippling.
 */
#include <GL/glut.h>
#include <stdlib.h>

void display(void) {
  GLubyte fly[]={
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x01, 0xC0,
      0x06, 0xC0, 0x03, 0x60, 0x04, 0x60, 0x06, 0x20, 0x04, 0x30, 0x0C, 0x20,
      0x04, 0x18, 0x18, 0x20, 0x04, 0x0C, 0x30, 0x20, 0x04, 0x06, 0x60, 0x20,
      0x44, 0x03, 0xC0, 0x22, 0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22,
      0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22,
      0x44, 0x01, 0x80, 0x22, 0x66, 0x01, 0x80, 0x66, 0x33, 0x01, 0x80, 0xCC,
      0x19, 0x81, 0x81, 0x98, 0x0C, 0xC1, 0x83, 0x30, 0x07, 0xe1, 0x87, 0xe0,
      0x03, 0x3f, 0xfc, 0xc0, 0x03, 0x31, 0x8c, 0xc0, 0x03, 0x33, 0xcc, 0xc0,
      0x06, 0x64, 0x26, 0x60, 0x0c, 0xcc, 0x33, 0x30, 0x18, 0xcc, 0x33, 0x18,
      0x10, 0xc4, 0x23, 0x08, 0x10, 0x63, 0xC6, 0x08, 0x10, 0x30, 0x0c, 0x08,
      0x10, 0x18, 0x18, 0x08, 0x10, 0x00, 0x00, 0x08
  };

  GLubyte halftone[]={
    0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
      0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
      0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
      0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
      0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
      0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
      0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
      0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
      0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA,
      0x55, 0x55, 0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
      0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55
  };

  glClear(GL_COLOR_BUFFER_BIT);
  glColor3f(1.0,
            1.0,
            1.0);

  glRectf(25.0,
          25.0,
          125.0,
          125.0);
  glEnable(GL_POLYGON_STIPPLE);
  glPolygonStipple(fly);
  glRectf(125.0,
          25.0,
          225.0,
          125.0);
  glPolygonStipple(halftone);
  glRectf(225.0,
          25.0,
          325.0,
          125.0);
  glDisable(GL_POLYGON_STIPPLE);

  glFlush();
}

void init(void){
  glClearColor(0.0,
               0.0,
               0.0,
               0.0);
  glShadeModel(GL_FLAT);
}

void reshape(int w, int h) {
  glViewport(0,
             0,
             (GLsizei)w,
             (GLsizei)h);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluOrtho2D(0.0,
             (GLdouble)w,
             0.0,
             (GLdouble)h);
}

void keyboard(unsigned char key, int x, int y) {
  switch(key){
    case 27:
      exit(0);
      break;
  }
}

int main(int argc, char* argv[]) {
  glutInit(&argc,
           argv);
  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
  glutInitWindowSize(350,
                     150);
  glutCreateWindow(argv[0]);
  init();
  glutDisplayFunc(display);
  glutReshapeFunc(reshape);
  glutKeyboardFunc(keyboard);
  glutMainLoop();
  return 0;
}