internal void FinishAnimation(Matrix worldMatrix)
        {
            //-----------------------------------------------
            int lenght = worldTransforms.Length;

            //bonetransform is keyframe nature from the fbx
            worldTransforms[0] = boneTransforms[0] * currentAnimation.inverseBindPose[0]
                * skinData.BindPose[0] * worldMatrix;
            for (int i = 1; i < lenght; i++)
            {
                int parent = skinData.SkeletonHierarchy[i];
                worldTransforms[i] = boneTransforms[i]
                    * currentAnimation.inverseBindPose[i] * skinData.BindPose[i] * worldTransforms[parent];
            }

            for (int i = 0; i < lenght; i++)
            {
                skinTransforms[i] = skinData.InverseBindPose[i] * worldTransforms[i];
            }
        }