python">#!/usr/bin/env python3 """ turtle-example-suite: tdemo_bytedesign.py An example adapted from the example-suite of PythonCard's turtle graphics. It's based on an article in BYTE magazine Problem Solving with Logo: Using Turtle Graphics to Redraw a Design November 1982, p. 118 - 134 ------------------------------------------- Due to the statement t.delay(0) in line 152, which sets the animation delay to 0, this animation runs in "line per line" mode as fast as possible. """ import math from turtle import Turtle, mainloop from time import clock # wrapper for any additional drawing routines # that need to know about each other class 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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最后更新 2018-05-17 08:00 星期四 所属：
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