turtle chaser 01

turtle_chaser_01.py

import turtle

# turtle bounces from screen edge

#w, h = 600,400
#turtle.setup(w*2, h*2)
screen = turtle.Screen()
screen.setup(1.0, 0.9)
w, h = screen.window_width()/2, screen.window_height()/2


a = turtle.Turtle()
#a.speed(0)
a.shape("turtle")
a.color("blue")

a.left(10)

b = turtle.Turtle()
b.shape("turtle")
b.color("red")

while True:
    a.forward(10)
    winkel = a.heading()

    if a.xcor() > w:
        a.setx(w)
        a.setheading(180-winkel)
    elif a.xcor() < -w:
        a.setx(-w)
        a.setheading(180-winkel)
    if a.ycor() > h:
        a.sety(h)
        a.setheading(360-winkel)
    elif a.ycor() < -h:
        a.sety(-h)
        a.setheading(360-winkel)

    # ----------

    winkel2 = b.towards(a)
    #diff = b.heading() - winkel2
    diff = (winkel2 - b.heading() - 0) %360

    #print(diff)
    if abs(diff) < 4:
        pass
    elif diff > 180:
        b.right(3)
    elif diff < 180:
        b.left(3)


    turtle.title(f"b towards a:{winkel2:.2f}, b heading: {b.heading():.2f}, diff: {diff:.2f}")


    #diff = b.heading() - winkel2
    #b.left(-diff / 2)
    b.forward(5)

turtle.exitonclick()