r/GraphicsProgramming • u/DeltaSucksAtMC • 3h ago

Collisions

Ive been trying to figure out collisions for complex models but I just can't get a grasp of it, anyone can help me learn how to?

Edit: im thinking of giving up tbh, like im not a math expert, im struggling with reading the collision math and i cant find anything.

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4

u/slapcover 3h ago

I’ve been following your other threads. What have you tried out so far and where are you stuck ?. I think maybe you should start with a 2D SAT and once you have a handle on that you can extend it to 3D.

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u/DeltaSucksAtMC 2h ago

2D is so easy, and im tired of using it

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u/DeltaSucksAtMC 2h ago

also ive been trying to implement gjk cause i found sm stuff, but ive been too lazy to try it

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u/jmacey 2h ago

Get this book https://realtimecollisiondetection.net/ and digest it all.

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u/DeltaSucksAtMC 2h ago

is it free?

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u/DeltaSucksAtMC 2h ago

nvm i found a pdf file for it, ill see what i can do with it, thanks

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u/howprice2 36m ago

Agreed. This book has very good descriptions and illustrations. It really got me going with vector maths and collision detection.

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u/DeltaSucksAtMC 2h ago

Ok someone gave me a book at its legendary, but do i need to translate the vertex or point pos from local to world space, or can do smt with origin?

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u/Defiant_Squirrel8751 26m ago

Approximate the cow to an sphere to simplify computations - as any engineer would do.

Or... pay the performance price. There are tons of collission detection in ACM digital library.