#!/usr/bin/env python
#coding:utf-8
 
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
import sys
 
def main():
    glutInit(sys.argv)
    glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH)
    glutInitWindowSize(1280, 720)    # window size
    glutInitWindowPosition(100, 100) # window position
    glutCreateWindow("teapot")       # show window
    glutDisplayFunc(display)         # draw callback function
    glutReshapeFunc(reshape)         # resize callback function
    init(300, 300)
    glutMainLoop()
 
def init(width, height):
    """ initialize """
    glClearColor(0.0, 0.0, 0.0, 1.0)
    glEnable(GL_DEPTH_TEST) # enable shading
 
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    ##set perspective 
    gluPerspective(45.0, float(width)/float(height), 0.1, 100.0) 
 
def display():
    """ display """
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glMatrixMode(GL_MODELVIEW)
    glLoadIdentity()
    ##set camera
    gluLookAt(0.0, 1.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0)    
    ##draw a teapot
    glColor3f(1.0, 0.0, 0.0)
    glutWireTeapot(1.0)   # wireframe
#    glutSolidTeapot(1.0)  # solid
    glFlush()  # enforce OpenGL command
 
def reshape(width, height):
    """callback function resize window"""
    glViewport(0, 0, width, height)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    gluPerspective(45.0, float(width)/float(height), 0.1, 100.0)
 
if __name__ == "__main__":
    main()