# Fixture:setFilterData

Available since LÖVE 0.8.0
This method is not supported in earlier versions.

Sets the filter data of the fixture.

Groups, categories, and mask can be used to define the collision behaviour of the fixture.

If two fixtures are in the same group they either always collide if the group is positive, or never collide if it's negative. Is the group zero or they do not match, then the contact filter checks if the fixtures select a category of the other fixture with their masks. The fixtures do not collide if that's not the case. If they do have each others categories selected, the return value of the custom contact filter will be used. They always collide if none was set.

There can be up to 16 categories. Categories and masks are encoded as the bits of a 16-bit integer.

## Function

### Synopsis

    Fixture:setFilterData( categories, mask, group )

### Arguments

`number categories`
  The categories as an integer from 0 to 65535.
`number mask`
  The mask as an integer from 0 to 65535.
`number group`
  The group as an integer from -32768 to 32767.

### Returns

Nothing.

## See Also

- Fixture
- Fixture:getFilterData

##

Category:

- Functions