WINAK

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#

# Created on 8-okt.-2012

#

# @author: Stijn Manhaeve      rolnummer: 20121442

# editor used: Eclipse 4.2.0 + PyDev

#

# This shows how to use the discs module



# import statements

import turtle

import discs



colors = ["green",              # the colors

          "purple", "magenta",

          "blue", "yellow",

          "orange", "red"]



wn = turtle.Screen()    # create a window for the turtles

discs.draw_discs(colors, 600)

wn.mainloop()

Code: Select all

#

# Created on 8-okt.-2012

#

# @author: Stijn Manhaeve      rolnummer: 20121442

# editor used: Eclipse 4.2.0 + PyDev

#

# to draw your own set of discs:

#    import this module

#    create a list of strings to use as colors

#    choose the outer_radius of the largest disc

#    call draw_discs(colors, start_radius)



# import statements

import turtle

import math

import random



# local fields

circle_quality = 270            # the number of sides used to draw a circle

circle_amount = 20              # amount of circles in each disc

animation_speed = 0             # the default animation speed for the turtles

radius_ratio = 7/8              # inner radius = radius_ratio*outer_radius

radius_degradation = 1/2        # new disc.radius = old radius*radius_degradation



# functions

def draw_poly(t, sides, length):

    # t = turtle

    # sides = number of sides

    # length = length of sides

    # (this function was already written by me for exercise 3 of chapter 4)

    

    angle = 360/sides

    for i in range(sides):

        t.forward(length)

        t.right(angle)



def draw_circle(t, x, y, r):

    # t = turtle

    #        - should be positioned at the origin and facing east!

    # x = x-coordinate of the midpoint

    # y = y-coordinate of the midpoint

    # r = radius

    

    # calculate length of the sides

    length = 2*r*math.sin(180/circle_quality)

    

    # move to starting point

    t.penup()

    t.forward(x)

    t.left(90)

    t.forward(y+r)

    t.right(90)

    t.pendown()

    

    # draw the circle

    draw_poly(t, circle_quality, length)



def draw_disc(r, count, color):

    # r = radius of the midpoints = outer radius

    # count = the number of circles to draw for each disc

    # color = disc color

    

    inner = r*radius_ratio  # calculate radius of the circles (the 'inner radius')

    angle_jump = 360/count  # the angle between two successive midpoints and the origin

    

    # draw the circles

    for i in range(count):

        # calculate midpoint

        x = r*math.cos(i*angle_jump)

        y = r*math.sin(i*angle_jump)

        # define the turtle

        t = turtle.Turtle()

        t.color(color)

        t.hideturtle()

        t.speed(animation_speed)

        # draw the circle

        draw_circle(t, x, y, inner)



def draw_discs(colors, start_radius):

    # colors = which colors to use

    # start_radius = starting outer radius

    

    radius = start_radius

    random.shuffle(colors)

    for i in colors:

        draw_disc(radius, circle_amount, i)

        radius *= radius_degradation