Esfera con piso

#include <GL/glut.h>
GLfloat anguloCuboX = 0.0f;
GLfloat anguloCuboY = 0.0f;
GLfloat anguloEsfera = 0.0f;
GLint ancho=400;
GLint alto=400;
int hazPerspectiva = 0;
int moverY = 0;

void reshape(int width, int height)
{
    glViewport(0, 0, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
  
    if(hazPerspectiva)
     gluPerspective(60.0f, (GLfloat)width/(GLfloat)height, 1.0f, 20.0f);
    else
      glOrtho(-4,4, -4, 4, 1, 10);
    glMatrixMode(GL_MODELVIEW);
    ancho = width;
    alto = height;
 if(moverY)
    gluPerspective(100.0f, (GLfloat)width/(GLfloat)height, 100.0f, 100.0f);
 else
      glOrtho(-4,4, -4, 4, 1, 10);
    glMatrixMode(GL_MODELVIEW);
    ancho = width;
    alto = height;
}
void drawCube(void)
{

    glColor3f(1.0f, 0.0f, 1.0f);
    glBegin(GL_QUADS);      
    glVertex3f( 2.0f,-2.0f, -1.0f);
    glVertex3f( 3.0f,-5.0f, 2.0f);
    glVertex3f(-4.0f,-4.0f,  2.0f);
   glVertex3f(-3.0f,-2.0f, -2.0f);
    glEnd();
}
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
    glTranslatef(3.0f, 0.0f, -5.0f);
    glTranslatef(-3,0,0);
  
    glScalef(1.0f, 1.0f, 1.0f);
    drawCube();
    glLoadIdentity();
    glTranslatef(0.0f, 0.0f, -5.0f);
  glRotatef(anguloEsfera, 1.0f, 0.0f, 0.0f);
    glTranslatef(0.0f, 0.0f, 0.0f);
    glColor3f(1.0f, 1.0f, 1.0f);
    glutWireSphere(0.5f, 8, 8);
    glFlush();
    glutSwapBuffers();
    anguloCuboX+=0.1f;
    anguloCuboY+=1.1f;
    anguloEsfera+=0.2f;
}
void init()
{
    glClearColor(0,0,0,0);
    glEnable(GL_DEPTH_TEST);
    ancho = 400;
    alto = 400;
}

void idle()
{
    display();
}

void keyboard(unsigned char key, int x, int y )
{
    switch(key)
    {
    case 'p':
    case 'P':
      hazPerspectiva=1;
      reshape(ancho,alto);
      break;
    case 'o':
    case 'O':
      hazPerspectiva=0;
      reshape(ancho,alto);
      break;
   
 case 'w':
  case 'W':
  moverY=1.0;
   reshape(ancho,alto);
   break;
    case 27:
      break;
 }
}
int main(int argc, char **argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(ancho, alto);
    glutCreateWindow("Cubo 1");
    init();
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutIdleFunc(idle);
    glutKeyboardFunc(keyboard);
    glutMainLoop();
    return 0;
}