/// <summary>
///
/// </summary>
/// <param name="document"></param>
public FbxHelper(FbxDocument document)
{
// set document
_document = document;
// get and store sfbx version
var ver = _document.GetNodesByName("FBXVersion");
if (ver.Length > 0)
{
Version = (int)ver[0].Value;
}
else
{
Version = -1;
}
// get connectors
var connections = _document.GetNodesByName("C");
if (connections.Length == 0)
{
connections = _document.GetNodesByName("Connect");
}
// use strings for backwards compatibility
foreach (var oo in connections)
{
if (!Connections.ContainsKey(oo.Properties[1].ToString()))
{
Connections.Add(oo.Properties[1].ToString(), new List <string>());
}
Connections[oo.Properties[1].ToString()].Add(oo.Properties[2].ToString());
}
}
/// <summary>
/// Gets a list of animations from the fbx animation stack.
/// </summary>
/// <returns></returns>
public List <IOAnimation> GetAnimations()
{
List <IOAnimation> anims = new List <IOAnimation>();
foreach (var node in _document.GetNodesByName("AnimationStack"))
{
//Create the animation.
IOAnimation currentAnim = LoadAnimationStack(node);
anims.Add(currentAnim);
//Use the stop amount from the animation properties for the end frame.
currentAnim.EndFrame = ConvertTimeUnits((long)node["Properties70"].GetNodesByValue("LocalStop")[0].Properties[4]);
//AnimationLayer
foreach (var layer in GetChildConnections(node))
{
IOAnimation currentGroup = LoadAnimationLayer(node);
currentAnim.Groups.Add(currentGroup);
//AnimationCurveNode
foreach (var curveNode in GetChildConnections(layer))
{
//All tracks have the same animated object reference.
//Set it per group still.
currentGroup.Name = FindAnimatedObject(curveNode);
//Only care about the node type.
string trackNodeType = curveNode.Properties[NodeDescSize - 2].ToString();
//Go through each AnimationCurve
var curves = GetChildConnections(curveNode);
for (int i = 0; i < curves.Count; i++)
{
currentGroup.Tracks.Add(LoadAnimationCurve(curves[i], trackNodeType, i));
}
}
}
}
return(anims);
}
/// <summary>
/// Extracts skeleton information from fbx file
/// </summary>
/// <returns></returns>
public IOSkeleton GetSkeleton()
{
// search all limb nodes
var limbs = _document.GetNodesByName("Model").Where(e => e.Properties.Count >= NodeDescSize && e.Properties[NodeDescSize - 1].ToString().Contains("Limb"));
// map the id to the newly create bone
Dictionary <string, IOBone> idToBone = new Dictionary <string, IOBone>();
// convert nodes to bones
foreach (var l in limbs)
{
idToBone.Add(l.Value.ToString(), CreateBoneFromNode(l));
}
// create io skeleton
var skeleton = new IOSkeleton();
// make connections
foreach (var v in idToBone)
{
if (Connections.ContainsKey(v.Key) && Connections[v.Key].Count > 0 && idToBone.ContainsKey(Connections[v.Key][0]))
{
idToBone[Connections[v.Key][0]].AddChild(v.Value);
}
else
{
skeleton.RootBones.Add(v.Value);
}
}
// account for blender's armature node
var nullParent = GetBoneParentTransform();
foreach (var skel in skeleton.RootBones)
{
skel.LocalTransform *= nullParent;
}
return(skeleton);
}
