# Fixture:setMask

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.

## Function

### Synopsis

    Fixture:setMask( mask1, mask2, ... )

### Arguments

`number mask1`
  The first category.
`number mask2`
  The second category.

### Returns

Nothing.

## See Also

- Fixture
- Fixture:getMask

##

Category:

- Functions