How to get the Global Position of Bone

[adam]

Does anyone know how to get the global position of a bone?

[JCPalmer]

Maybe:

var scale = BABYLON.Vector3.Zero();
var rotation = new BABYLON.Quaternion();
var translation = BABYLON.Vector3.Zero();

bone.getAbsoluteMatrix().decompose(scale, rotation, translation);

Translation might be your wanted position.

[adam]

That helped.  I got the absolute matrix of the bone and then multiplied it by the world matrix of the mesh.  Thanks!

[adam]

Here is a non-allocating function to get the absolute matrix:

        Bone.prototype.getAbsoluteMatrixToRef = function (result) {
            var matrix = result;
            matrix.copyFrom(this._matrix);
            var parent = this._parent;
            while (parent) {
                matrix.multiplyToRef(parent.getLocalMatrix(), matrix);
                parent = parent.getParent();
            }
        };

 

[adam]

Thanks @Deltakosh for your recent work on Bone._absoluteTransform !

https://github.com/BabylonJS/Babylon.js/commit/3fce20e8c99f414f3af93df26e59e1e14f15124a