How do I make an ellipse go to the end of the screen and bounce and so on?

sandrap

Hello! I´m using your program for my class, and I was wondering how to make an ellipse go to the end of the screen and bounce and then to another end and keep bouncing? Also, I wanted to know how do I make a lot of ellipses bounce at the same time. Thank you! Awesome program!

TfGuy44

What have you tried? Have you looked at any of the examples?

GoToLoop

http://studio.SketchPad.cc/sp/pad/view/ro.n3zAlnxKVUP/latest
http://studio.SketchPad.cc/sp/pad/view/ro.9oyKfI9kOIa77/latest

jeremydouglass

The 10 minute "Processing 3 Debugger" video tutorial is entirely working with a simple bouncing ball sketch. It is a single bounce (not both walls), but a good starting point explanation of a bounce. Skip to 7:00 to see the correct code running after the bug is removed.

There are also bouncing ball sketches on the PVector tutorial page, including "Bouncing Ball with No Vectors".

Ater

Basically you have a pair of variables for position (say x and y) and in order for ball to move, you add some value to it each frame - velocityX and velocityY. When your ball position reaches the end of the window, you can multiply according velocity variable by -1 and it would change the direction to the opposite.

If you wish there to be more then one ball, you definitely need to check out these topics: https://forum.processing.org/two/discussion/8082/from-several-variables-to-arrays https://forum.processing.org/two/discussion/8081/from-several-arrays-to-classes

quark

This post will give information about rebounding from a border and then the follow up post looks at linear motion,