# Demo of recording keyboard state, for multi-key commands
# Holding 'a' and 'b' keys together animates the teapot

import sys, math, time
from OpenGL.GLUT import *
from OpenGL.GL import *
from OpenGL.GLU import *

frame = 0
size = 0.5
animating = False

def draw():
    global frame, size
    glClear(GL_COLOR_BUFFER_BIT)
    glutWireTeapot(size)
    glFlush()

keystate = { 'a':False, 'b':False }

def keyboard(key, x, y):
    global keystate
    if key == chr(27):
        sys.exit(0)
    else:
        keystate[key] = True

def keyboardUp(key, x, y):
    global keystate
    keystate[key] = False

startTime = time.time()

def idle():
    global frame, size, startTime, keystate
    frame = frame + 1
    if keystate['a'] and keystate['b']:
        size = math.sin(time.time())
    glutPostRedisplay()

glutInit([])
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB)
glutInitWindowSize(200, 200)
glutInitWindowPosition(0,0)
glutCreateWindow(sys.argv[0])
glutDisplayFunc(draw)
glutKeyboardFunc(keyboard)
glutKeyboardUpFunc(keyboardUp)
glutIgnoreKeyRepeat(1)
glutIdleFunc(idle)
glutMainLoop()