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Python Graphics Help

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Join Date: Oct 2005

Posts: 5

Reputation: qwester is an unknown quantity at this point

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qwester

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Newbie Poster

Python Graphics Help

Oct 6th, 2005

Hello, I'm having trouble with a project that I am doing in turtle graphics.
I'm making a graphic of a soccer field with a ball bouncing around, but I want the ball to stop when it hits the net. I can get the ball to stop when it hits the net though, it keeps on bouncing. Any suggestions would be appreciated. The if statement that I am trying to use is

if -100>x>100 and -25>y>25:\
return

and I have an attachment of the work I have done.

Attached Files

jm_soccer.zip (813 Bytes, 27 views)

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Join Date: Oct 2004

Posts: 3,858

Reputation: vegaseat is just really nice

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vegaseat

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DaniWeb's Hypocrite

Re: Python Graphics Help

Oct 6th, 2005

I am experimenting with your attachment. Please do not mix tabs and spaces for indentations, stick with spaces! A few comments would be nice! It just makes it nicer for other people to use and check your code.

What do you want to use to start the program? Just for initial testing I am using soccer(1000, 1, 30)

You could score goals as your x,y coordinates of the turtle fall within the range of the goal-fronts.

May 'the Google' be with you!

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Join Date: Oct 2004

Posts: 3,858

Reputation: vegaseat is just really nice

Solved Threads: 867

vegaseat

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DaniWeb's Hypocrite

Re: Python Graphics Help

Oct 6th, 2005

The turtles are active! This is sure an interesting game. I changed the soccer function to this ...

 Help with Code Tags 
 Python Syntax (Toggle Plain Text) 
def soccer(num_steps, step_size, heading):
    turtle.reset()
    draw_table()
    top = 100/2
    bottom = top * -1
    right = 200/2
    left = right * -1
    turtle.left(heading)
    leftGoal = 0
    rightGoal = 0
    for step in range(num_steps):
        turtle.forward(step_size)
        x, y = turtle.position()
        # make the ball/turtle bounce
        if left >= x or x >= right:
            turtle.left(180-2*turtle.heading())
        else:
            if y <= bottom or top <= y:
                turtle.right(2*turtle.heading())
        if x <= -100 and -25 <= y <= 25:
            #print turtle.position()    # test
            leftGoal += 1
            print "leftGoal =", leftGoal
        if x >= 100 and -25 <= y <= 25:
            #print turtle.position()    # test
            rightGoal += 1
            print "rightGoal =", rightGoal
    print "Final score is right %d and left %d" % (rightGoal, leftGoal)
def soccer(num_steps, step_size, heading):
    turtle.reset()
    draw_table()
    top = 100/2
    bottom = top * -1
    right = 200/2
    left = right * -1
    turtle.left(heading)
    leftGoal = 0
    rightGoal = 0
    for step in range(num_steps):
        turtle.forward(step_size)
        x, y = turtle.position()
        # make the ball/turtle bounce
        if left >= x or x >= right:
            turtle.left(180-2*turtle.heading())
        else:
            if y <= bottom or top <= y:
                turtle.right(2*turtle.heading())
        if x <= -100 and -25 <= y <= 25:
            #print turtle.position()    # test
            leftGoal += 1
            print "leftGoal =", leftGoal
        if x >= 100 and -25 <= y <= 25:
            #print turtle.position()    # test
            rightGoal += 1
            print "rightGoal =", rightGoal
    print "Final score is right %d and left %d" % (rightGoal, leftGoal)

This way you can keep track of right and left goal scores. To make the game more interesting you may want to add a small random bounce to your deflections.