Type alias InteractionGroups

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
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