Unity3D2Babylon.SceneBuilder.ConvertUnitySkeletonToBabylon C# (CSharp) Method

        private BabylonSkeleton ConvertUnitySkeletonToBabylon(Transform[] bones, Matrix4x4[] bindPoses, Transform transform, GameObject gameObject, float progress)
        {
            ExporterWindow.ReportProgress(progress, "Exporting skeleton: " + gameObject.name);
            BabylonSkeleton babylonSkeleton = new BabylonSkeleton();
            babylonSkeleton.name = gameObject.name;
            babylonSkeleton.id = Math.Abs(GetID(transform.gameObject).GetHashCode());
            babylonSkeleton.needInitialSkinMatrix = false;

            // Prefilled to keep order and track parents.
            int index = 0;
            var transformToBoneMap = new Dictionary<Transform, BabylonBone>();
            foreach (Transform unityBone in bones)
            {
                var babylonBone = new BabylonBone();
                babylonBone.name = unityBone.name;
                babylonBone.index = index;

                transformToBoneMap.Add(unityBone, babylonBone);
                index++;
            }

            // Attaches Matrix and parent.
            index = 0;
            foreach (Transform unityBone in bones)
            {
                var babylonBone = transformToBoneMap[unityBone];
                Matrix4x4 localTransform;

                // Unity BindPose is already inverse so take the inverse again :-)
                if (transformToBoneMap.ContainsKey(unityBone.parent))
                {
                    var babylonParentBone = transformToBoneMap[unityBone.parent];
                    babylonBone.parentBoneIndex = babylonParentBone.index;
                    localTransform = bindPoses[babylonBone.parentBoneIndex] * bindPoses[index].inverse;
                }
                else
                {
                    babylonBone.parentBoneIndex = -1;
                    localTransform = bindPoses[index].inverse;
                }

                transformToBoneMap[unityBone].matrix = new[] {
                    localTransform[0, 0], localTransform[1, 0], localTransform[2, 0], localTransform[3, 0],
                    localTransform[0, 1], localTransform[1, 1], localTransform[2, 1], localTransform[3, 1],
                    localTransform[0, 2], localTransform[1, 2], localTransform[2, 2], localTransform[3, 2],
                    localTransform[0, 3], localTransform[1, 3], localTransform[2, 3], localTransform[3, 3]
                };
                index++;
            }

            // Reorder and attach the skeleton.
            babylonSkeleton.bones = transformToBoneMap.Values.OrderBy(b => b.index).ToArray();
            babylonScene.SkeletonsList.Add(babylonSkeleton);
            return babylonSkeleton;
        }
    }