Collision Shapes Won't Move With Model Animations

Pulsahr

So I made a model for my game in Blender and got it ported over to Godot. I've been able to add collision shapes to each part of the model, but I can't seem to figure out how to get these shapes to move along with the model's animations. Is there a way I can do this without having to animate each collision shape individually?

DaveTheCoder

Pulsahr to move along with the model's animations

Do the animations only change the model's position/rotation, or also other properties?

If it's only the position/rotation, and the collision shape is the child of the node that's animated, the collision shape's position/rotation should automatically follow the animated node's position/rotation..

Pulsahr

DaveTheCoder Yeah. Only the rotation and positions are getting changed (mostly rotation). Having them as children was the first thing I tried, but after playing one of the animations in the editor, none of the collision shapes moved. Here's the scene:

Each of the visible shapes has a StaticBody3D as a child with the corresponding collision shape as a child of that. I tried switching the StaticBody Nodes for AnimatableBody Nodes instead, but that didn't seem to work.

kuligs2

Pulsahr

DaveTheCoder

Pulsahr after playing one of the animations in the editor

That might only show the animation itself and not the full effects.

Have you tried running the scene or project?

Pulsahr

DaveTheCoder Yeah I just now did. I viewed it with collision shapes being visible, and they were still stationary with the idle animation playing.

DaveTheCoder

Can you make a Minimal Reproduction Project and post it? For example, a project with a single object whose collision shape does not follow the model.

Pulsahr

DaveTheCoder Sure. Are you wanting to just view it or actually look inside the project for yourself (I assume the latter)?

DaveTheCoder

A Minimal Reproduction Project (MRP) is a small Godot project (in a .zip) which reproduces the issue, with no unnecessary files included. Be sure to not include the .godot folder in the .archive (but keep project.godot).

Pulsahr

DaveTheCoder Alright; the MRP is ready now and should be formatted the way you wanted. What would be a good way to post it? I'm still relatively new to exporting and sharing projects so sorry if this is a dumb question.

Tomcat

Pulsahr What would be a good way to post it?

Any file-sharing site. As far as I know, https://gofile.io/ doesn't require registration.

Looking at your scene tree, I'm not sure it will behave the way you expect. Or maybe I'm not quite understanding you.

DaveTheCoder

Pulsahr What would be a good way to post it?

An MRP should be a small .zip file, and can be posted as an attachment.

Pulsahr

Tomcat Yeah I'm trying to get the collision shapes to move with the model when it plays any of it's animations, but the collision shapes aren't quite doing so. Not sure if that helps or not, but that's the problem I'm having at the moment.

Pulsahr

DaveTheCoder Like so?

tridra-minimal-reproduction-project.zip

123kB

kuligs2

Pulsahr
StaticBody3D is not meant to be moved. Use RigidBody for movable objects.
But this is not the problem. Your base node for this character must be CharacterBody3D
Then add collision to the characterbody3D.

Then You didnt even look at the video i posted, it explains exactly what you had to do. You create physical skeleton that attaches collision shapes to bones, that move with animations, These collision shapes are not CharacterBody collision shapes, so you add another collision shape to your character to interact with world. But the skeleton shapes can be used to sense such as hitboxes and stuff like that. Just put them on another layer/mask.

Pulsahr

kuligs2 I'm sorry if it seemed like I ignored your solution earlier.
That video was actually the first thing I watched and implemented. It mostly worked, except a few bones never got physical bones and one of them connected weirdly. I'm sure those were problems with the actual skeleton. I think it might have also been causing the scene to be a little larger in file size and I kept getting notifications for it anytime I saved the scene, which is something I would like to avoid if possible. I also had it in a CharacterBody node originally (something I forgot to put into the MRP).
I'm not sure if any of that was caused because of the physical bones or not, just some minor things I came across as I was implementing that.
I was mostly trying to see if there was another way of doing that, since I figured I was probably going to be re-importing that model a lot, and having to redo the physical skeleton and re-adjust everything would take a lot of time, so I wanted to see if there was another way of doing what I was trying to do, such as just using the add collision shape button on all the meshes at once.
I'm not trying to sound argumentative or anything like that, just trying to see if there were other options avaliable.

Pulsahr

I think I might have found the problem: the origins of all the meshes making up my model are all 0, 0, 0 for some reason. I checked in Blender, and this isn't the case there. This would explain why none of the collision shapes were moving with the animations.

Now I just need to figure out how to fix this. Any insight would be greatly appreciated.

kuligs2

Pulsahr from your pictures, you had staticbody3d nodes as root node for collision shapes thats why it didnt move because its static.

DaveTheCoder

kuligs2 it didnt move because its static

A StaticBody3D isn't moved by the physics engine. But if a StaticBody3D is a child of a node that's moved either by the physics engine or manually, wouldn't the StaticBody3D move along with its parent?

I'm not clear on whether that's relevant in this particular case.