#!/usr/bin/python
# (c) Copyright 1993, Silicon Graphics, Inc.
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# LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
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# POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
# 
# US Government Users Restricted Rights 
# Use, duplication, or disclosure by the Government is subject to
# restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
# (c)(1)(ii) of the Rights in Technical Data and Computer Software
# clause at DFARS 252.227-7013 and/or in similar or successor
# clauses in the FAR or the DOD or NASA FAR Supplement.
# Unpublished-- rights reserved under the copyright laws of the
# United States.  Contractor/manufacturer is Silicon Graphics,
# Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
#
# OpenGL(TM) is a trademark of Silicon Graphics, Inc.
#/
#
#  scene.c
#  This program demonstrates the use of the GL lighting model.
#  Objects are drawn using a grey material characteristic. 
#  A single light source illuminates the objects.
#

from opengl import *
import time

def myinit ():
     light_ambient = newfv4( 0.0, 0.0, 0.0, 1.0 );
     light_diffuse = newfv4( 1.0, 1.0, 1.0, 1.0 );
     light_specular = newfv4( 1.0, 1.0, 1.0, 1.0 );
     light_position = newfv4( 1.0, 1.0, 1.0, 0.0 );
     glLightfv (GL_LIGHT0, GL_AMBIENT, light_ambient);
     glLightfv (GL_LIGHT0, GL_DIFFUSE, light_diffuse);
     glLightfv (GL_LIGHT0, GL_SPECULAR, light_specular);
     glLightfv (GL_LIGHT0, GL_POSITION, light_position);
     glEnable (GL_LIGHTING);
     glEnable (GL_LIGHT0);
     glDepthFunc(GL_LESS);
     glEnable(GL_DEPTH_TEST);

def display ():
    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix ();
    glRotatef (20.0, 1.0, 0.0, 0.0);
    glPushMatrix ();
    glTranslatef (-0.75, 0.5, 0.0); 
    glRotatef (90.0, 1.0, 0.0, 0.0);
    auxSolidTorus (0.275, 0.85);
    glPopMatrix ();
    glPushMatrix ();
    glTranslatef (-0.75, -0.5, 0.0); 
    glRotatef (270.0, 1.0, 0.0, 0.0);
    auxSolidCone (1.0, 2.0);
    glPopMatrix ();
    glPushMatrix ();
    glTranslatef (0.75, 0.0, -1.0); 
    auxSolidSphere (1.0);
    glPopMatrix ();
    glPopMatrix ();
    glFlush ();

def myReshape(w, h):
    glViewport (0, 0, w, h);
    glMatrixMode (GL_PROJECTION);
    glLoadIdentity ();
    if (w <= h) :
	glOrtho (-2.5, 2.5, -2.5*h/w,2.5*h/w, -10.0, 10.0);
    else :
	glOrtho (-2.5*w/h, 2.5*w/h, -2.5, 2.5, -10.0, 10.0);
    glMatrixMode (GL_MODELVIEW);

auxInitDisplayMode (AUX_SINGLE | AUX_RGB | AUX_DEPTH);
auxInitPosition (0, 0, 500, 500);
auxInitWindow ("scene");
myinit ();
myReshape(500,500);
display();
time.sleep(15)