- r -

• RayCast() : b2BroadPhase , b2DynamicTree , b2CircleShape , b2Fixture , b2World , b2EdgeShape , b2ChainShape , b2PolygonShape , b2Shape
• RebuildBottomUp() : b2DynamicTree
• Refilter() : b2Fixture
• ReportFixture() : b2RayCastCallback , b2QueryCallback
• Reset() : b2Timer
• ResetFriction() : b2Contact
• ResetMassData() : b2Body
• ResetRestitution() : b2Contact