How to use PhysicsServer3D.body_test_motion

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1

Godot Version

V4.2.1

Question

I have been scratching my head on how to tell where my character will land before I hit the ground for days now and I think I found a solution but I don’t know how to use it properly.

I think that the PhysicsServer3D method “body_test_motion” will get me the results I want

From what I understand within the method I need to pass a RID, a Motion and then get my result in the form of a Vector3 Collision point (get_collision_point).

What exactly is a RID? I’m assuming its my character or whatever I am moving but not exactly sure how to write it properly
How would I give it my motion? I am assuming my velocity?
And can I use this to tell where my character will land and if so how do you properly write this in gdscript?

If possible a gdscript example of how this method is written would be amazing

2

To the future people here also in need of help with using this function it’s posible to use by doing it like this

define a PhysicsTestMotionParameters3D varible in the script, and instanciate it in the ready function, or where ever you’re gonna use it and make sure to define the motion property in the PhysicsTestMotionParameters3D .

having done that just pass it into the function like so

PhysicsServer3D.body_test_motion(get_rid(), your_PhysicsTestMotion)

the important part that they dont tell you in the documentation is to keep updating the PhysicsTestMotionParameters3D parameter called “from”. which is where the motion begins from. I recomend updating it just whenever you’re gonna run the function but fell free to do whatever otherwise you will end up having a never changing result from the function.