humanoid, joints throwing agent around the room

[tender bane]

making a thread

[merry socket]

Make sure the balls don't have colliders

@tender bane

The default sphere object has a sphere collider

Did you add joints to the spheres too?

[tender bane]

yeah, unfortunately still happening :( All of the colliders and joint collisions are disabled, and I have another script that is disabling the collision for each ball with the rest of the limbs. so no internal collisions on them at all

yes! It might be an issue with the relativity of mass on the humanoid, but even with the balls at an incredibly low mass it's still happening

[merry socket]

Yeah avoid adding joints to them. The joint usually always affects the other body in some way

Just make the spheres children of the bones or something

With no rigidbody, no collider or anything

These spheres dont need any physics because it's for visualization, right?

[tender bane]

Ahh alright, thanks!

[tender bane]

They need the physics because of the desired result (joints touching ground, agent can learn to use the joints, etc)

I was considering parenting them but there's always the issue with scaling. The unity ml-agents walking project has an empty parent for each limb, and then a child for the mesh and a child for the rigidbody. That seems like a nightmare to work with 😆

But having a rigidbody as a child of another rigidbody is also a big issue... just remembered that

[merry socket]

Yes, that's always bad

Unless the child (and parent?) is kinematic i guess

[tender bane]

Maybe combining the mesh would be a solution

[merry socket]

I'm not saying your ragdoll doesn't need joints, but why do the spheres need joints?

You said it's just for visualization

[tender bane]

the spheres don't need joints per se, ideally they would have physics & collisions but it's not required

there is a sphere on the end of each "hand" and "foot" that DO need physics interaction, but leaving those on doesn't seem to be causing an issue. probably because it's the end of the chain

[merry socket]

They can still have a collider if they are a child of a limb rigidbody

It will become part of the rigidbody

The sphere itself doesn't need its own rigidbody

[tender bane]

incredible information, thanks!

that's how I'm going to proceed then, and I'll work around the scaling issue

[merry socket]

Try to keep your rigidbodies at 1,1,1 scale

Each limb can have a separate child for the visuals (mesh renderer + mesh filter), and you can scale the child

[tender bane]

interesting, I havent heard of this before

[merry socket]

It's just a good rule of thumb when working with physics

[tender bane]

and a mesh collider? The rigidbody would just act as a solver parent?

[merry socket]

Other uniform scales are probably ok too, like 2, 2, 2

[merry socket]

No need for mesh collider. Use a box or a capsule

Box collider would align better with the visuals if you use a box mesh, but capsule is probably more stable for ragdolls

Since it's smoother

[tender bane]

very interesting, really appreciate the help! I'm going to try this heirarchy out :)

[merry socket]

And the collider can be on the parent (that has the rigidbody), or the children, doesn't really matter as long as it's not scaled weirdly