lombardy_poplar.py 文件源码

def q_prod(sym):
    """Production rule for Q"""
    ret = []
    prev_ang = 0
    for _ in range(int(random() * 2 + 3)):
        ang = random() * 10 + 30
        ret.extend([LSymbol("/", {"a": prev_ang + 75 + random() * 10}),
                    LSymbol("&", {"a": ang}),
                    LSymbol("!", {"w": sym.parameters["w"] * 0.2}),
                    LSymbol("["),
                    LSymbol("A", {"w": sym.parameters["w"] * 0.3,
                                  "l": 1.5 * sqrt(sym.parameters["w"]) * (random() * 0.2 + 0.9)}),
                    LSymbol("]"),
                    LSymbol("!", {"w": sym.parameters["w"]}),
                    LSymbol("^", {"a": ang}),
                    LSymbol("F", {"l": sym.parameters["l"]})])
    ret.append(LSymbol("Q", {"w": max(0, sym.parameters["w"] - __base_width__ / 14),
                             "l": sym.parameters["l"]}))
    return ret