CODEWITHSUNDEEP
iphoneobjective-ccollision-detectionbox2d
Sixva
Sixva

Reputation: 41

Fast collision detection in Box2d

Imagine there are 20 types of objects.

What fast methods exist to detect which objects collide now in Box2d?

A scan with switch/if is not fast enough.

Upvotes: 0

Views: 329

Answers (1)

iforce2d
iforce2d

Reputation: 8262

The best way to keep an updated list of which objects are currently colliding with each other is to use the BeginContact/EndContact events to update the list - typically each object would store such a list so it can access whatever it's touching efficiently. If you really think it's a problem to check the tags of the other objects in this list, you could have more than one list, eg. you could keep all touching objects of kTag1 in a list by themselves.

Upvotes: 2

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