# Type alias InteractionGroups

InteractionGroups: number

Pairwise filtering using bit masks.

This filtering method is based on two 16-bit values:

- The interaction groups (the 16 left-most bits of `self.0`).
- The interaction mask (the 16 right-most bits of `self.0`).

An interaction is allowed between two filters `a` and `b` two conditions are met simultaneously:

- The interaction groups of `a` has at least one bit set to `1` in common with the interaction mask of `b`.
- The interaction groups of `b` has at least one bit set to `1` in common with the interaction mask of `a`. In other words, interactions are allowed between two filter iff. the following condition is met:

    ((a >> 16) & b) != 0 && ((b >> 16) & a) != 0

- Defined in geometry/interaction_groups.d.ts:18