分形图，,#!/usr/bin/e
#!/usr/bin/env python3""" turtle-example-suite: tdemo_bytedesign.pyAn example adapted from the example-suiteof PythonCard's turtle graphics.It's based on an article in BYTE magazineProblem Solving with Logo: Using TurtleGraphics to Redraw a DesignNovember 1982, p. 118 - 134-------------------------------------------Due to the statementt.delay(0)in line 152, which sets the animation delayto 0, this animation runs in "line per line"mode as fast as possible."""import mathfrom turtle import Turtle, mainloopfrom time import clock# wrapper for any additional drawing routines# that need to know about each otherclass Designer(Turtle): def design(self, homePos, scale): self.up() for i in range(5): self.forward(64.65 * scale) self.down() self.wheel(self.position(), scale) self.up() self.backward(64.65 * scale) self.right(72) self.up() self.goto(homePos) self.right(36) self.forward(24.5 * scale) self.right(198) self.down() self.centerpiece(46 * scale, 143.4, scale) self.getscreen().tracer(True) def wheel(self, initpos, scale): self.right(54) for i in range(4): self.pentpiece(initpos, scale) self.down() self.left(36) for i in range(5): self.tripiece(initpos, scale) self.left(36) for i in range(5): self.down() self.right(72) self.forward(28 * scale) self.up() self.backward(28 * scale) self.left(54) self.getscreen().update() def tripiece(self, initpos, scale): oldh = self.heading() self.down() self.backward(2.5 * scale) self.tripolyr(31.5 * scale, scale) self.up() self.goto(initpos) self.setheading(oldh) self.down() self.backward(2.5 * scale) self.tripolyl(31.5 * scale, scale) self.up() self.goto(initpos) self.setheading(oldh) self.left(72) self.getscreen().update() def pentpiece(self, initpos, scale): oldh = self.heading() self.up() self.forward(29 * scale) self.down() for i in range(5): self.forward(18 * scale) self.right(72) self.pentr(18 * scale, 75, scale) self.up() self.goto(initpos) self.setheading(oldh) self.forward(29 * scale) self.down() for i in range(5): self.forward(18 * scale) self.right(72) self.pentl(18 * scale, 75, scale) self.up() self.goto(initpos) self.setheading(oldh) self.left(72) self.getscreen().update() def pentl(self, side, ang, scale): if side < (2 * scale): return self.forward(side) self.left(ang) self.pentl(side - (.38 * scale), ang, scale) def pentr(self, side, ang, scale): if side < (2 * scale): return self.forward(side) self.right(ang) self.pentr(side - (.38 * scale), ang, scale) def tripolyr(self, side, scale): if side < (4 * scale): return self.forward(side) self.right(111) self.forward(side / 1.78) self.right(111) self.forward(side / 1.3) self.right(146) self.tripolyr(side * .75, scale) def tripolyl(self, side, scale): if side < (4 * scale): return self.forward(side) self.left(111) self.forward(side / 1.78) self.left(111) self.forward(side / 1.3) self.left(146) self.tripolyl(side * .75, scale) def centerpiece(self, s, a, scale): self.forward(s); self.left(a) if s < (7.5 * scale): return self.centerpiece(s - (1.2 * scale), a, scale)def main(): t = Designer() t.speed(0) t.hideturtle() t.getscreen().delay(0) t.getscreen().tracer(0) at = clock() t.design(t.position(), 2) et = clock() return "runtime: %.2f sec." % (et-at)if __name__ == '__main__': msg = main() print(msg) mainloop()
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