protected void FilterHierarchy(Node node)
{
// if the node has just a single unnamed child containing a mesh, remove
// the anonymous node inbetween. The 3DSMax kwXport plugin seems to produce this
// mess in some cases
if (node.Children.Count == 1 && node.Meshes.Count == 0)
{
Node child = node.Children[0];
if (child.Name.Length == 0 && (child.Meshes.Count > 0))
{
// transfer its meshes to us
for (uint a = 0; a < child.Meshes.Count; a++)
node.Meshes.Add(child.Meshes[(int)a]);
child.Meshes.Clear();
// transfer the transform as well
node.TrafoMatrix = node.TrafoMatrix * child.TrafoMatrix;
// then kill it
node.Children.Clear();
}
}
// recurse
for (uint a = 0; a < node.Children.Count; a++)
FilterHierarchy(node.Children[(int)a]);
}
protected void ParseDataObjectFrame(Node parent)
{
string name;
ReadHeadOfDataObject(out name);
// create a named node and place it at its parent, if given
Node node = new Node(parent);
node.Name = name;
if (parent != null)
{
parent.Children.Add(node);
}
else
{
// there might be multiple root nodes
if (scene.RootNode != null)
{
if (scene.RootNode.Name != "$dummy_root")
{
// place a dummy root if not there
Node exroot = scene.RootNode;
scene.RootNode = new Node(null);
scene.RootNode.Name = "$dummy_root";
scene.RootNode.Children.Add(exroot);
exroot.Parent = scene.RootNode;
}
// put the new node as its child instead
scene.RootNode.Children.Add(node);
node.Parent = scene.RootNode;
}
else
{
// it's the first node imported. place it as root
scene.RootNode = node;
}
}
// Now inside a frame.
// read tokens until closing brace is reached.
bool running = true;
while (running)
{
string objectName = GetNextToken();
if (objectName.Length == 0)
{
ThrowException("Unexpected end of file reached while parsing frame");
}
if (objectName == "}")
{
break; // frame finished
}
else if (objectName == "Frame")
{
ParseDataObjectFrame(node); // child frame
}
else if (objectName == "FrameTransformMatrix")
{
ParseDataObjectTransformationMatrix(out node.TrafoMatrix);
}
else if (objectName == "Mesh")
{
Mesh mesh;
ParseDataObjectMesh(out mesh);
node.Meshes.Add(mesh);
}
else
{
Debug.WriteLine("Unknown data object in frame in x file");
ParseUnknownDataObject();
}
}
}
public Node(Node parent = null)
{
this.Parent = parent;
}