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As game designer, that is up to you.
The End.
Alright, alright... Ask yourself how do you want the game to be played. Ask yourself how should the player react with the results of combat. Then, for each aspect of your combat mechanic consider how it supports those play styles and whatever or not it justifies reactions you do not want.
It can be helpful to ...
2
This is not done with angles.
This is done with vectors. Well, actually you could do it with angles...
In any case, the ball has a velocity vector at the instant of collision, and will have a new velocity vector from the collision resolution. There are a few ways we can go about getting that new velocity vector:
You can use vector projection to extract ...
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