palm.py 文件源码

def system():
    """initialize and iterate the system as appropriate"""
    l_sys = LSystem(axiom=[LSymbol("!", {"w": 0.2}),
                           LSymbol("/", {"a": random() * 360}),
                           LSymbol("Q", {"t": 0})],
                    rules={"Q": q_prod, "A": a_prod},
                    tropism=Vector([0, 0, -1]),
                    thickness=0.2,
                    bendiness=0,
                    leaf_shape=10,
                    leaf_scale=1,
                    leaf_scale_x=0.1,
                    leaf_bend=0)
    l_sys.iterate_n(100)
    return l_sys