/// <summary>
/// If HierInfo represents a UsdSkelRoot, reads the associated skelton joints into the
/// skelJoints member.
/// </summary>
static void ReadSkeletonJoints(ref HierInfo skelRootInfo)
{
if (skelRootInfo.prim == null)
{
return;
}
var skelRoot = new UsdSkelRoot(skelRootInfo.prim);
if (!skelRoot)
{
return;
}
var processed = new HashSet <SdfPath>();
foreach (UsdSkelBinding binding in skelRootInfo.skelBindings)
{
var skel = binding.GetSkeleton();
if (!skel)
{
continue;
}
// If the same skeleton is referenced multiple times, only process it once.
if (processed.Contains(skel.GetPath()))
{
continue;
}
processed.Add(skel.GetPath());
var jointsAttr = skel.GetJointsAttr();
if (!jointsAttr)
{
continue;
}
var vtJoints = jointsAttr.Get();
if (vtJoints.IsEmpty())
{
continue;
}
var vtStrings = UsdCs.VtValueToVtTokenArray(vtJoints);
var joints = UnityTypeConverter.FromVtArray(vtStrings);
var skelPath = skel.GetPath();
skelRootInfo.skelJoints = new SdfPath[joints.Length];
for (int i = 0; i < joints.Length; i++)
{
var jointPath = new SdfPath(joints[i]);
if (joints[i] == "/")
{
skelRootInfo.skelJoints[i] = skelPath;
continue;
}
else if (jointPath.IsAbsolutePath())
{
Debug.LogException(new Exception("Unexpected absolute joint path: " + jointPath));
jointPath = new SdfPath(joints[i].TrimStart('/'));
}
skelRootInfo.skelJoints[i] = skelPath.AppendPath(jointPath);
}
}
}
static void ReadSkeleton(ref HierInfo info)
{
if (info.prim == null)
{
return;
}
var skelRoot = new UsdSkelRoot(info.prim);
if (!skelRoot)
{
return;
}
var skelRel = info.prim.GetRelationship(UsdSkelTokens.skelSkeleton);
if (!skelRel)
{
return;
}
SdfPathVector targets = skelRel.GetForwardedTargets();
if (targets == null || targets.Count == 0)
{
return;
}
var skelPrim = info.prim.GetStage().GetPrimAtPath(targets[0]);
if (!skelPrim)
{
return;
}
var skel = new UsdSkelSkeleton(skelPrim);
if (!skel)
{
return;
}
var jointsAttr = skel.GetJointsAttr();
if (!jointsAttr)
{
return;
}
var vtJoints = jointsAttr.Get();
if (vtJoints.IsEmpty())
{
return;
}
var vtStrings = UsdCs.VtValueToVtTokenArray(vtJoints);
var joints = UnityTypeConverter.FromVtArray(vtStrings);
var skelPath = skelPrim.GetPath();
info.skelJoints = new SdfPath[joints.Length];
for (int i = 0; i < joints.Length; i++)
{
var jointPath = new SdfPath(joints[i]);
if (joints[i] == "/")
{
info.skelJoints[i] = skelPath;
continue;
}
else if (jointPath.IsAbsolutePath())
{
Debug.LogException(new Exception("Unexpected absolute joint path: " + jointPath));
jointPath = new SdfPath(joints[i].TrimStart('/'));
}
info.skelJoints[i] = skelPath.AppendPath(jointPath);
}
}
