BoneLookController has no impact on running animation

Questions
1

Hi!

I’m trying to move the head of an animated character towards a sphere (by BoneLookController), but I can’t figure out why this does not work on my gltf file:

https://www.babylonjs-playground.com/#1B1PUZ#60

I simply edited this demo scene where it worked with a babylon file:
https://www.babylonjs-playground.com/#1B1PUZ#15

Does anyone have a hint for me how to get this to work? Thanks!

2

Unfortunately, gltf midels are not compatible with bone controllers. I wrote the controllers before gltf was implemented in bjs.

3

Oh okay, thank you for your answer!

Is there still a possibility to override parameters (e.g. the rotation of a bone) which are already set by a running animation? Currently, every change of the rotation will be directly overwritten by the walk animation…

4

Here is my working implementation without the BoneLookController if someone also struggle with this:
https://www.babylonjs-playground.com/#1B1PUZ#65

To get this to work, I removed the keyframes of the walk animation for the head bone from the gltf-file (so I can apply my own rotation via code) and calculated the direction with the given functions in the Matrix and Quaternion classes by my own. I also implemented a little state machine to fade between “following” and “initial” to avoid highly unreasonable rotations.

1 Like
5

gltf bones work by attaching each bone to a transformNode. So to control a bone you actually need to control the source node.

This is why BoneLookController does not work with skeletons loaded from gltf :slight_smile:

6

It appears that @AndreM is controlling the bone and not the source node in this PG:

7

I see. It’s weird, though, that the bonelookcontroller isn’t working now that there is no animation on the head.

8

it works because there is no more animation to overwrite it

1 Like
9

yet bonelookcontroller doesn’t work when there is no animation

10

This is how it works: Babylon.js/skeleton.ts at master · BabylonJS/Babylon.js · GitHub

11

Hi, sorry to bump - how would one use the transformNode in order to achieve the BoneLookController functionality? I can’t get AndreM’s solution to work.