Available since LÖVE 0.8.0
This method is not supported in earlier versions.
Fixture:setMask works in NOT.Categories selected will NOT collide with this fixture. If you want to work as Box2d works with Mask use instead Fixture:setFilterData
Sets the category mask of the fixture. There can be up to 16 categories represented as a number from 1 to 16.
This fixture will NOT collide with the fixtures that are in the selected categories if the other fixture also has a category of this fixture selected.
Fixture:setMask( mask1, mask2, ... )
Nothing.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://love2d.org/wiki/Fixture:setMask