# L-3.0 MCS 260 Fri 20 Jun 2014 : turtlecolors

"""
The script below illustrates turtle geometry
and the (r, g, b) color triangle.
"""

from math import cos, sin, pi

from turtle import Turtle

ANGLE = 2*pi/3 # angle to draw a triangle
BIGRAD = 200   # radius of the enscribed circle
CIRRAD = 80    # radius of the colored circles
# first we draw the triangle
TRIANGLE = Turtle()
TRIANGLE.up()
TRIANGLE.goto(BIGRAD, 0)
TRIANGLE.down()
TRIANGLE.goto(BIGRAD*cos(ANGLE), BIGRAD*sin(ANGLE))
TRIANGLE.goto(BIGRAD*cos(2*ANGLE), BIGRAD*sin(2*ANGLE))
TRIANGLE.goto(BIGRAD, 0)
ANS = raw_input("hit enter to continue ...")
# at the corners we put primary rgb colored disks
TRIANGLE.tracer(False)
TRIANGLE.up()
TRIANGLE.goto(BIGRAD, -CIRRAD)
TRIANGLE.down()
TRIANGLE.begin_fill()
TRIANGLE.color((1.0, 0.0, 0.0), (1.0, 0.0, 0.0))
TRIANGLE.circle(CIRRAD)
TRIANGLE.end_fill()
TRIANGLE.up()
TRIANGLE.goto(BIGRAD*cos(ANGLE), BIGRAD*sin(ANGLE)-CIRRAD)
TRIANGLE.down()
TRIANGLE.begin_fill()
TRIANGLE.color((0.0, 1.0, 0.0), (0.0, 1.0, 0.0))
TRIANGLE.circle(CIRRAD)
TRIANGLE.end_fill()
TRIANGLE.up()
TRIANGLE.goto(BIGRAD*cos(2*ANGLE), BIGRAD*sin(2*ANGLE)-CIRRAD)
TRIANGLE.down()
TRIANGLE.begin_fill()
TRIANGLE.color((0.0, 0.0, 1.0), (0.0, 0.0, 1.0))
TRIANGLE.circle(CIRRAD)
TRIANGLE.end_fill()
ANS = raw_input("hit enter to continue ...")
# then we draw the combinations at the edges
ANGLE2 = pi/3 # smaller angle for 6-gon
EDGE = 100    # to put circles on edges of triangle
RAD2 = 40     # radius of the secondary rgb colored disks
TRIANGLE.up()
TRIANGLE.goto(EDGE*cos(ANGLE2), EDGE*sin(ANGLE2)-RAD2)
TRIANGLE.down()
TRIANGLE.begin_fill()
TRIANGLE.color((1.0, 1.0, 0.0), (1.0, 1.0, 0.0))
TRIANGLE.circle(RAD2)
TRIANGLE.end_fill()
TRIANGLE.up()
TRIANGLE.goto(EDGE*cos(ANGLE+ANGLE2), EDGE*sin(ANGLE+ANGLE2)-RAD2)
TRIANGLE.down()
TRIANGLE.begin_fill()
TRIANGLE.color((0.0, 1.0, 1.0), (0.0, 1.0, 1.0))
TRIANGLE.circle(RAD2)
TRIANGLE.end_fill()
TRIANGLE.up()
TRIANGLE.goto(EDGE*cos(2*ANGLE+ANGLE2), EDGE*sin(2*ANGLE+ANGLE2)-RAD2)
TRIANGLE.down()
TRIANGLE.begin_fill()
TRIANGLE.color((1.0, 0.0, 1.0), (1.0, 0.0, 1.0))
TRIANGLE.circle(RAD2)
TRIANGLE.end_fill()
# to prevent the turtle window from disappearing
ANS = raw_input('hit enter to exit ...')