Building a pong game with circular obstacles in the middle.. need help

So I have made a pong game that is shaped like an octagon and now I want to add two circular bumpers into the mix. I have the circles plotted but I am having trouble creating an if statement that properly defines the circle as a bumper. I need an if statement that will not let the ball enter the circle without triggering my bounce function. Heres the statement I have right now..

if (((newX < circleX2s) & (newX>circleX2s)) & ((newY < circleY2s)...
         & (newY > circleY2s)))
       plot(circleX2s,circleY2s,'b')
    end

The 'plot' is just a test to see if it is registering when the ball enters the circle.

Any suggestions?

Thank you for your help.

Answer 1

[Walter Roberson]

distsq1 = (Circle1CenterX - newX).^2 + (Circle1CenterY - newY).^2;
if distsq1 < Circle1Radius.^2
   you are inside the circle
end

[brian grove]

This worked great! thanks