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+--- Thread: Python 3 Turtle - Screen Events and Coords (/thread-29118.html)
Python 3 Turtle - Screen Events and Coords - peteralien - Aug-18-2020
This program moves a Turtle in 4 directions using keys. I want to control the Turtle collision with the Screen boundaries too. But I'm having a very weird problem!
For example, when I move the Turtle to the right side it works OK, but when I turn the Turtle to the left side, graphically it turns OK but the coordinate values that Print command gives me, instead decreasing the X-coordinate value, increase one time it and then start to decrease!
Of course this messes up with the collision control I'm trying to create!
I just tested everything I could think of but so far got no luck!
I'm using Python 3.7.7 with Turtle graphics, in Thonny 3.2.7. I tested it in Repl.it and the result was the same!
Here is the code:
import turtle
def turtleUp():
t1.setheading(90)
if not colisao():
t1.sety(t1.ycor() + 10)
def turtleDown():
t1.setheading(270)
if not colisao():
t1.sety(t1.ycor() - 10)
def turtleRight():
t1.setheading(0)
if not colisao():
t1.setx(t1.xcor() + 10)
def turtleLeft():
t1.setheading(180)
if not colisao():
t1.setx(t1.xcor() - 10)
def colisao():
print(t1.xcor(), t1.ycor())
if t1.xcor() < -470 or t1.xcor() > 460 or t1.ycor() < -370 or t1.ycor() > 360:
return True
else:
return False
screen_width = 1000
screen_height = 800
s = turtle.Screen()
s.setup(screen_width, screen_height)
s.bgcolor("lime")
t1 = turtle.Turtle()
t1.speed(0)
t1.shape("turtle")
t1.color("black")
t1.up()
t1.goto(0, 0)
s.onkeypress(turtleUp, "w")
s.onkeypress(turtleDown, "s")
s.onkeypress(turtleRight, "p")
s.onkeypress(turtleLeft, "o")
s.listen()
s.mainloop()