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Durfy

Problem with collision detection for pong.

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The ball may be moving at a different speed than the paddle. When you calculate collision detection you check position of ball vs position of paddle. If the paddle's step is > than the ball it may jump the ball (crossing its path) but never actually being in the same position. How can i solve this? Thanks, durfy

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You don't compare positions. You check whether these shapes intersect each other. Using AABB'es (axis-aligned bounding box) for this is relatively easy to set-up, and works pretty well, as long as your ball isn't moving blazingly fast each frame. If it does move that fast, you can do multiple checks: one check when both objects are moved half-ways, another one when they're at 25% of their movement, and so on, up to an acceptable depth.

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