How to use a CSGCombiner as collision for a Rigidbody

jackson06

Hi,

Background: I'm working on destructible environments for my game. So far, when a bullet hits a wall, I'm spawning in a CSGSphere set to Intersection where the bullet collides. I then spawn in the resulting cut-out as a rigidbody with a bit of velocity so it appears to break off of the wall. The problem is that it doesn't have any collision, so it just falls through the floor.

Problem: Because CSGs only have StaticBody - style collision, they dont work as a child of a Rigidbody. Is there any way I can access the completed mesh of the CSGCombiner and convert it to a CollisionShape? TwistedTwiglegs reply to this post shows a way to do this using the get_meshes() function, but for me, this function simply returns an empty array with no mesh data. I can attach my project here if it would help, but it's a bit messy right now. Thanks for any help guys :)

Erich_L

I tried to do something similar before: cutting a mesh in half and instancing it as a rigid body. I looked through it and here's the code I think can help you:

	# arrMesh : ArrayMesh the new mesh you've calculated
	var newMesh = MeshInstance.new()
	newMesh.set_mesh(arrMesh)

	var newObject = RigidObject.new()
	var collShape = newMesh.mesh.create_convex_shape()
	var newCollider = CollisionShape.new()
	newCollider.shape = collShape
	newObject.add_child(newCollider)

Although I got this working and was extremely proud of myself for a day, it was entirely too slow for my use case. If you keep your wall with the same collision shape it should be fine though.