Issue with Area2D BodyEntered with RigidBody2d

[Greg]

Godot Version

4.5_dev 3

Question

I have a RigidBody2d with a CollisionShape2D. I also have a separate Area2d node which also has a collisionShape2D.

If the RidgidBody2d has a non-zero gravity scale and it drops into the Area 2D then the bodyEntered signal fires properly . GOOD

If the RidgidBody2d has a zero gravity scale and I give it a linear velocity to make it run into the Area 2D then the bodyEntered signal fires properly . GOOD

If the RidgidBody2d has a zero gravity scale and no velocity and I move it in the _process method with position.x += 100 * delta then the RidgidBody2d moves, but when it enters the Area2D the bodyEntered signal DOES NOT fire. BAD

I want to have a car moving down a road and I want it to know when it enters an Area2D in front of an intersection so it can slow down and wait for a light. But moving the position of the RidgidBody2d via the position attribute seems not to fire the body entered signal.

Is this the expected behavior?

[FreakyGoose]

It is recommended in the docs not to directly alter positions of physics bodies. If you need to change the position of a rigid body, do it in the integrate_forces function.

[Greg]

OH, Of Course.

I’ve used that before. I don’t know why I’ve forgotten about that.

Thank you