#include <GL/openglut.h>
#include <stdlib.h>
#include "jitter.h"
void myinit(void)
{
    GLfloat mat_ambient[] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat light_position[] = { 0.0, 0.0, 10.0, 1.0 };
    GLfloat lm_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialf(GL_FRONT, GL_SHININESS, 50.0);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lm_ambient);
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glDepthFunc(GL_LESS);
    glEnable(GL_DEPTH_TEST);
    glShadeModel (GL_FLAT);
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glClearAccum(0.0, 0.0, 0.0, 0.0);
}
void displayObjects(void)
{
    GLfloat torus_diffuse[] = { 0.7, 0.7, 0.0, 1.0 };
    GLfloat cube_diffuse[] = { 0.0, 0.7, 0.7, 1.0 };
    GLfloat sphere_diffuse[] = { 0.7, 0.0, 0.7, 1.0 };
    GLfloat octa_diffuse[] = { 0.7, 0.4, 0.4, 1.0 };
    glPushMatrix ();
    glRotatef (30.0, 1.0, 0.0, 0.0);
    glPushMatrix ();
    glTranslatef (-0.80, 0.35, 0.0);
    glRotatef (100.0, 1.0, 0.0, 0.0);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, torus_diffuse);
    glutSolidTorus (0.275, 0.85, 16, 16);
    glPopMatrix ();
    glPushMatrix ();
    glTranslatef (-0.75, -0.50, 0.0);
    glRotatef (45.0, 0.0, 0.0, 1.0);
    glRotatef (45.0, 1.0, 0.0, 0.0);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, cube_diffuse);
    glutSolidCube (1.5);
    glPopMatrix ();
    glPushMatrix ();
    glTranslatef (0.75, 0.60, 0.0);
    glRotatef (30.0, 1.0, 0.0, 0.0);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, sphere_diffuse);
    glutSolidSphere (1.0, 16, 16);
    glPopMatrix ();
    glPushMatrix ();
    glTranslatef (0.70, -0.90, 0.25);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, octa_diffuse);
    glutSolidOctahedron ();
    glPopMatrix ();
    glPopMatrix ();
}
#define ACSIZE  8
void display(void)
{
    GLint viewport[4];
    int jitter;
    glGetIntegerv (GL_VIEWPORT, viewport);
    glClear(GL_ACCUM_BUFFER_BIT);
    for (jitter = 0; jitter < ACSIZE; jitter++) {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix ();
    glTranslatef (j8[jitter].x*4.5/viewport[2],
        j8[jitter].y*4.5/viewport[3], 0.0);
    displayObjects ();
    glPopMatrix ();
    glAccum(GL_ACCUM, 1.0/ACSIZE);
    }
    glAccum (GL_RETURN, 1.0);
    glFlush();
}
void myReshape(int w, int h)
{
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (w <= h)
    glOrtho (-2.25, 2.25, -2.25*h/w, 2.25*h/w, -10.0, 10.0);
    else
    glOrtho (-2.25*w/h, 2.25*w/h, -2.25, 2.25, -10.0, 10.0);
    glMatrixMode(GL_MODELVIEW);
}
static void
key(unsigned char k, int x, int y)
{
  switch (k) {
  case 27:  
    exit(0);
    break;
  default:
    return;
  }
  glutPostRedisplay();
}
int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB
            | GLUT_ACCUM | GLUT_DEPTH);
    glutInitWindowSize (250, 250);
    glutCreateWindow (argv[0]);
    myinit();
    glutReshapeFunc (myReshape);
    glutDisplayFunc(display);
    glutKeyboardFunc(key);
    glutMainLoop();
    return 0;             
}