Need to make a ball bounce off a circle.
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I have a pong game that I want to add a function circular bumper to. I already have a way of detecting when the ball enters the circle but now I need to figure out how to make it bounce off the wall of the circle.
My function for bouncing the ball off the walls is
function bounce (tempV)
%normalize vector
tempV(1) = tempV(1) ./ (sqrt(tempV(1)^2 + tempV(2)^2));
tempV(2) = tempV(2) ./ (sqrt(tempV(1)^2 + tempV(2)^2));
ballVector = tempV;
and I feed the function something along these lines...
bounce([ballVector(1), -1 * (Y_FACTOR + abs(ballVector(2)))]);
but I can't get it to work for the circle... any ideas?
1 Comment
Chad Greene
on 20 May 2015
We don't have enough information about your variables. Whether you're giving a talk or writing a report or posting on a forum, always explicitly describe any variable you ever show. If a variable is not relevant, do not show it to us. If a variable is relevant, describe it.
To increase your chances of getting helpful responses, provide a picture of what you're trying to do and some simple working code that we can tinker with.
When I look at your code, all I see is not related to your question, but you can replace
sqrt(tempV(1)^2 + tempV(2)^2)
with
hypot(tempV(1),tempV(2))
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