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collision detection

Hi guys there...I'm actually working on a 2D fighting game ..sort of street fighter..I'm just wondering how can I write the codes for collision detections between the characters? thanks

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helmet275

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singersinger

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Thank you helmet275...But in fact my game isn't totally 2d..its a simulation of 3d using 2d methods..don't you think that a pixel collision detection would be a better method?

helmet275

Even if it is a 3d simulation using 2d methods you would still be detecting collisions in a 2d plane. Doing a pixel by pixel computation is going to be a lot slower than using a bounding box(or circle). Granted a pixel by pixel method would be more accurate but a trade off with speed needs to be considered. The faster computers today might be able to run a pixel method without a hitch but an older computer might not. Boxes would probably fit a human shaped body better than circles and by using either of these methods you can check collisions from both front and back with relative ease. You might try attaching a pointer to a list of your objects to each frame of animation in order to define the collison regions for each frame.

helmet275

try looking for this webpage for a more detailed description and implementation:
http://www.gamedev.net/reference/articles/article735.asp