Reflecting the ball based on the angle of the wall

I know it will inolve some trig, but exactly how it will apply?

Here's what I have for when the ball hits the wall:

rotation * = - 1;

It works based on the cannon angle but not the wall angle. Any help?

If you come in the wall you have "this ._rotation", then bounces off the wall, you will have...

This.rotation = 2 * wall._rotation - this ._rotation;

Tags: Adobe Animate

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