public Matrix4f getLocalToWorldMatrix(Matrix4f store) {
        if (store == null) {
            store = new Matrix4f();
        } else {
            store.loadIdentity();
        }
        // multiply with scale first, then rotate, finally translate (cf.
        // Eberly)
        store.scale(getWorldScale());
        store.multLocal(getWorldRotation());
        store.setTranslation(getWorldTranslation());
        return store;
    }
Creates a transform matrix that will convert from this spatials'
local coordinate space to the world coordinate space
based on the world transform.

@param store Matrix where to store the result, if null, a new one
will be created and returned.

@return store if not null, otherwise, a new matrix containing the result.

@see Spatial#getWorldTransform()
jme3-core/src/main/java/com/jme3/scene/Spatial.java