polarplots.py part 1

polarplots1.py

import turtle
import math


def main():

    print("--------------------")
    print("| codedrome.com    |")
    print("| Polar Plots with |")
    print("| Turtle Graphics  |")
    print("--------------------\n")

    # Uncomment this line to make drawing
    # a lot faster or change the argument
    # to any value. Default is 10ms.
    #turtle.delay(0)

    draw_axes(200)

    #plot("circle", 120, 0, 360, circle_function)
    #plot("cardioid", 100, 0, 360, cardioid_function)
    #plot("spiral", 100, 0, 3600, spiral_function)
    #plot("rose", 200, 0, 360, rose_function)

    turtle.hideturtle()

    # This stops the window closing after drawing is finished
    turtle.exitonclick()


def draw_axes(radius):

    """
    Draw lines from the origin every
    15 degrees with the angles labelled.
    """

    FONT_SIZE = 8
    FONT = ("Arial", FONT_SIZE, "bold")

    width = radius * 2 + 100
    height = radius * 2 + 100

    turtle.title("Polar Plot")

    turtle.screensize(canvwidth=width, canvheight=height)
    turtle.setup(width=width + 40, height=height + 40)
    turtle.shape("turtle")

    degree_label_radius = radius + 16

    turtle.pencolor(0.0, 0.0, 1.0)

    for degrees in range(0, 360, 15):

        radians = math.radians(degrees)

        turtle.penup()
        turtle.home()

        turtle.pendown()
        turtle.goto(math.cos(radians) * radius, math.sin(radians) * radius)

        turtle.penup()
        turtle.goto(math.cos(radians) * degree_label_radius,
                    math.sin(radians) * degree_label_radius)

        turtle.goto(turtle.position()[0], turtle.position()[1] - FONT_SIZE)

        turtle.pendown()
        turtle.write(str(degrees) + u'\u00B0', align='center', font=FONT)