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;
}
private void ExportSkin(IISkin skin, BabylonScene babylonScene)
{
var babylonSkeleton = new BabylonSkeleton {id = skins.IndexOf(skin)};
babylonSkeleton.name = "skeleton #" + babylonSkeleton.id;
RaiseMessage(babylonSkeleton.name, 1);
var bones = new List<BabylonBone>();
for (var index = 0; index < skin.NumBones; index++)
{
var bone = new BabylonBone {name = skin.GetBoneName(index), index = index};
var maxBone = skin.GetBone(index);
var parentNode = maxBone.ParentNode;
if (parentNode != null)
{
for (var recurseIndex = 0; recurseIndex < index; recurseIndex++)
{
if (skin.GetBone(recurseIndex).GetGuid() == parentNode.GetGuid())
{
bone.parentBoneIndex = recurseIndex;
break;
}
}
}
var hasParent = bone.parentBoneIndex != -1;
bone.matrix = GetBoneMatrix(skin, maxBone, 0, hasParent);
// Animation
var babylonAnimation = new BabylonAnimation
{
name = bone.name + "Animation",
property = "_matrix",
dataType = BabylonAnimation.DataType.Matrix,
loopBehavior = BabylonAnimation.LoopBehavior.Cycle,
framePerSecond = Loader.Global.FrameRate
};
var start = Loader.Core.AnimRange.Start;
var end = Loader.Core.AnimRange.End;
float[] previous = null;
var keys = new List<BabylonAnimationKey>();
for (var key = start; key <= end; key += Ticks)
{
var current = GetBoneMatrix(skin, maxBone, key, hasParent);
if (key == start || key == end || !(previous.IsEqualTo(current)))
{
keys.Add(new BabylonAnimationKey
{
frame = key / Ticks,
values = current
});
}
previous = current;
}
babylonAnimation.keys = keys.ToArray();
bone.animation = babylonAnimation;
bones.Add(bone);
}
babylonSkeleton.bones = bones.ToArray();
babylonScene.SkeletonsList.Add(babylonSkeleton);
}