/// <summary>
/// Export the bones and their animation for the given skin
/// </summary>
/// <param name="skin">The skin to export</param>
/// <returns></returns>
private BabylonBone[] ExportBones(IIGameSkin skin)
{
List <BabylonBone> bones = new List <BabylonBone>();
List <int> nodeIndices = GetNodeIndices(skin);
List <IIGameNode> revelantNodes = GetSkinnedBones(skin);
foreach (IIGameNode node in revelantNodes)
{
int parentIndex = (node.NodeParent == null) ? -1 : nodeIndices.IndexOf(node.NodeParent.NodeID);
string boneId = node.MaxNode.GetGuid().ToString();
// create the bone
BabylonBone bone = new BabylonBone()
{
id = (isGltfExported)?boneId:boneId + "-bone",// the suffix "-bone" is added in babylon export format to assure the uniqueness of IDs
parentNodeId = (parentIndex != -1)?node.NodeParent.MaxNode.GetGuid().ToString():null,
name = node.Name,
index = nodeIndices.IndexOf(node.NodeID),
parentBoneIndex = parentIndex,
matrix = (parentIndex == -1)?node.GetWorldTM(0).ToArray():node.GetLocalTM(0).ToArray()
};
// Apply unit conversion factor to meter
// Affect translation only
bone.matrix[12] *= scaleFactorToMeters;
bone.matrix[13] *= scaleFactorToMeters;
bone.matrix[14] *= scaleFactorToMeters;
if (exportParameters.exportAnimations)
{
// export its animation
var babylonAnimation = ExportMatrixAnimation("_matrix", key =>
{
IGMatrix mat = node.GetLocalTM(key);
float[] matrix = mat.ToArray();
// Apply unit conversion factor to meter
// Affect translation only
matrix[12] *= scaleFactorToMeters;
matrix[13] *= scaleFactorToMeters;
matrix[14] *= scaleFactorToMeters;
return(matrix);
},
false); // Do not remove linear animation keys for bones
if (babylonAnimation != null)
{
babylonAnimation.name = node.Name + "Animation"; // override default animation name
bone.animation = babylonAnimation;
}
}
bones.Add(bone);
}
return(bones.ToArray());
}
