3D Rigidbody landing on the wrong side

diningeachox

Hi Everyone,

New to the forum here. Been having a great time using Godot for my miniature 3D physics game when something very peculiar happened:

I'm dropping a rectangular prism onto a flat surface, and normally I would expect it to land on the side with the most surface area, but no matter how I rotate it, it always "stands up" so that it lands on the side with the smallest surface area.

TwistedTwigleg

Welcome to the forums @diningeachox!

What are the settings on your RigidBody node? Also, is the plane it is landing on a KinematicBody, RigidBody, or StaticBody node? I think I've had this issue once, but I do not remember what caused it nor the solution.

Calinou

Is the box a mesh exported from Blender (or another 3D DCC)? If so, make sure it's centered around the origin. Otherwise, its center of mass will be located at an incorrect location.

diningeachox

Thank you both for the helpful suggestions and Calinou is right, I didn't center it right so it behaved very weirdly! Is there a way to make sure the center is right in the middle of the object?

cybereality

In Blender the option is under Object -> Set Origin.

cybereality

Origin to Center of Mass (Volume) is probably what you want. Also make sure to apply all transforms as well.

diningeachox

Unfortunately I'm importing a readymade mesh so when I loaded it into the scene the center was already off. Right now I'm translating it manually but I'm really just eyeballing it. Is there a more precise way?

cybereality

You can import various formats into Blender and then edit the origin and re-export.

diningeachox

Cool, thanks everyone for the great help!