Objective

Follow-up to #718.

ContactPair has entity1, entity2, body_entity1, and body_entity2, while ContactConstraint has entity1, entity2, collider_entity1, and collider_entity2. The entity specifiers are kind of unnecessary, and it'd be nice if the names were more consistent and entity1 and entity2 were more explicit about whether they are the collider or body entities.

Solution

Rename the properties such that both ContactPair and ContactConstraint have collider1, collider2, body1, and body2.

Migration Guide

• ContactPair: The entity1 and entity2 properties are now collider1 and collider2, and body_entity1 and body_entity2 are now body1 and body2.
• ContactConstraint: The entity1 and entity2 properties are now body1 and body2, and collider_entity1 and collider_entity2 are now collider1 and collider2.