#!/usr/bin/env python
# pygame + PyOpenGL version of Nehe's OpenGL lesson02
# Paul Furber 2001 - m@verick.co.za

from OpenGL.GL import *
from OpenGL.GLU import *
import pygame
from pygame.locals import *


def resize((width, height)):
    if height==0:
        height=1
    glViewport(0, 0, width, height)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    gluPerspective(45, 1.0*width/height, 0.1, 100.0)
    glMatrixMode(GL_MODELVIEW)
    glLoadIdentity()

def init():
    glShadeModel(GL_SMOOTH)
    glClearColor(0.0, 0.0, 0.0, 0.0)
    glClearDepth(1.0)
    glEnable(GL_DEPTH_TEST)
    glDepthFunc(GL_LEQUAL)
    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)

def draw():
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
    glLoadIdentity()

    glTranslatef(-1.5, 0.0, -6.0)

    glBegin(GL_TRIANGLES)
    glVertex3f(0.0, 1.0, 0.0)
    glVertex3f(-1.0, -1.0, 0)
    glVertex3f(1.0, -1.0, 0)
    glEnd()

    glTranslatef(3.0, 0.0, 0.0)

    glBegin(GL_QUADS)
    glVertex3f(-1.0, 1.0, 0)
    glVertex3f(1.0, 1.0, 0)
    glVertex3f(1.0, -1.0, 0)
    glVertex3f(-1.0, -1.0, 0)
    glEnd()

def main():

    video_flags = OPENGL|DOUBLEBUF
    
    pygame.init()
    pygame.display.set_mode((640,480), video_flags)

    resize((640,480))
    init()

    frames = 0
    ticks = pygame.time.get_ticks()
    while 1:
        event = pygame.event.poll()
        if event.type == QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
            break
        
        draw()
        pygame.display.flip()
        frames = frames+1

    print "fps:  %d" % ((frames*1000)/(pygame.time.get_ticks()-ticks))


if __name__ == '__main__': main()