#!/usr/bin/python

"""      turtle-example-suite:

        tdemo_bytedesign.py

An example adapted from the example-suite

of PythonCard's turtle graphcis.

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.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.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()