Available since LÖVE 0.8.0
This method is not supported in earlier versions.
Sets the categories the fixture belongs to. There can be up to 16 categories represented as a number from 1 to 16.
Fixture:setCategory( category1, category2, ... )
Nothing.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://love2d.org/wiki/Fixture:setCategory