#include <stdio.h>
#include <stdlib.h>
#include <GL/glut.h>
#include <math.h>

#define PI 3.14159265359


GLuint draw;
void init3D(float r, float g, float b)
{


    glClearColor(r,g,b,1.0);
    glMatrixMode (GL_PROJECTION);
    glLoadIdentity();
    glOrtho(-100.0,100.0,-100.0,100.0,0.1,80);
}

void initList(){
    draw = glGenLists(1);
    glNewList(draw,GL_COMPILE);

        glColorMask(1,0,0,1);
        glutSolidTeapot(50);

    //glutSolidTorus(10, 50, 50, 50);

        glTranslated(0, 0, -10);
// /glTranslatef(-4.0f,0.0f,0.f);
        float traslation[16] = {1,0,0,0,0,1,0,0,0,0,1,0,-40.0f,0,0,1};
        float rotation [16] = {cos(90*PI/180),sin(90*PI/180),0,0,-(sin(90*PI/180)),cos(90*PI/180),0,0,0,0,1,0,0,0,0,1};
    glMultMatrixf(traslation);
        glMultMatrixf(rotation);

        glColorMask(0,0,1,1);
        glutSolidTeapot(50);

    glEndList();

}


void display(){





  glColorMask(1,1, 1, 1);
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  ///glColor3d(1, 0,1);
  glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    glPushMatrix();
        glCallList(draw);
    glPopMatrix();

//glutSolidTorus(10, 50, 50, 50);
  glutSwapBuffers();
  }

void createWindow(char *windowName)
{
  glutInitWindowPosition(300,100);
    glutInitWindowSize(800, 800);
    glutCreateWindow(windowName);
    initList();
    init3D(0.0,0.0,0.0);
    glutDisplayFunc(display);
}

void KEYBOARD(unsigned char key, int xx, int yy){
    switch(key){
        case 'e':
            glEnable(GL_DEPTH_TEST);
            break;
        case 'd':
            glDisable(GL_DEPTH_TEST);
            break;
    }
    glutPostRedisplay();
}

int main(int argc, char ** argv)
{

  glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA|GLUT_DEPTH);
    createWindow("3D Stereo");
    glutKeyboardFunc(KEYBOARD);
    // glutSpecialFunc(ESPECIAL);

    glutMainLoop(); //Start the main loop

    return 0;

}