####Using python turtle graphics. Nothing fancy, just part of my learning process. Could be a useful teaching tool.
The python script animates a rotating cicrle seen from the front (green) and side (blue) and the passage of time (yellow arrow). A sine wave is traced as the script executes.
import turtle
import math
# turtleSet makes the code a bit more compact
def turtleSet(name, shape, speed, color, pen, pos_x, pos_y):
name.ht()
name.up()
name.shape(shape)
name.speed(speed)
name.color(color)
name.pensize(pen)
name.setposition(pos_x, pos_y)
name.down()
name.st()
wn = turtle.Screen()
background = turtle.Turtle()
background.speed(0)
background.up()
background.goto(325, 325)
background.down()
background.right(90)
background.fillcolor("red")
background.begin_fill()
for i in range(4): # Draw a 650 x 650 square
background.forward(650)
background.right(90)
background.end_fill()
height = 200 #amplitude
period = 25 # Period, but without any specific unit.
circle = turtle.Turtle()
turtleSet(circle, 'circle', 10, "green", 2, height, 0)
circle.left(90)
sine = turtle.Turtle()
turtleSet(sine, 'circle', 10, "black", 2, -325, 0)
sine.st()
sine.left(45)
line = turtle.Turtle()
turtleSet(line, 'circle', 10, "blue", 2, -286, 0)
line.left(90)
time = turtle.Turtle()
turtleSet(time, 'arrow', 10, "yellow", 2, -325, 0)
time.right(0)
for i in range(650):
x = height*math.cos(i/period)
y = height*math.sin(i/period)
sine.goto(i-325, y)
circle.goto(x, y)
line.goto(-286, y)
time.goto(i-325, 0)
wn.exitonclick()