multiple bouncing triangles, using a simple class to hold the triangle data

animXform2.py

from pyglet.gl import *

window = pyglet.window.Window(600,500)

class Triangle:
    def __init__(self,x,y,dx,dy,rot):
        self.posX = x
        self.posY = y
        self.dx = dx
        self.dy = dy
        self.rot = rot

triangles = [ Triangle(10,10,1,1,0), Triangle(300,10,-1,1,45), Triangle(100,400,1,-1,70) ]
triangleVlist = pyglet.graphics.vertex_list(3, ('v2f', [-50,-50,  50,-50,  0,50]))

@window.event
def on_draw():
    global triangles
    glClear(GL_COLOR_BUFFER_BIT)
    glLoadIdentity()
    for tri in triangles:
        glLoadIdentity()
        glTranslatef(tri.posX, tri.posY, 0)
        glRotatef(tri.rot, 0, 0, 1)
        glColor3f(1, 0, 0.7)
        triangleVlist.draw(GL_TRIANGLES)



def update(dummy):
    global triangles

    for tri in triangles:
        if tri.posX < 0:
            tri.dx = 1
        elif tri.posX > 600:
            tri.dx = -1
        if tri.posY < 0:
            tri.dy = 1
        elif tri.posY > 500:
            tri.dy = -1
        tri.posX += tri.dx * 5
        tri.posY += tri.dy * 5
        tri.rot += 2


pyglet.clock.schedule_interval(update,1/60.0)
pyglet.app.run()