void PrepareBoneTransforms(Node node, ref Matrix4 parentTransform) {
Matrix4 g;
Matrix4.Mult(ref node.transform, ref parentTransform, out g);
if (_boneSet.Contains(node))
Matrix4.Mult(ref node.Bone._offset, ref g, out _boneTransforms[node.Bone.Index]);
if (node.Children != null) {
foreach (var child in node.Children)
this.PrepareBoneTransforms(child, ref g);
}
}
internal Node (string name, Node parent, ref Matrix4 transform, Mesh[] meshes) {
_name = name;
_parent = parent;
this.transform = transform;
_meshes = meshes;
}
void InitModel (BinaryReader reader, Dictionary<string, Texture> textures) {
var materials = this.ReadMaterials(reader, textures);
var meshes = this.ReadMeshes(reader, materials);
_meshes = meshes.ToDictionary<Mesh,string>(m => m.Name);
_anims = this.ReadAnimations(reader);
_root = this.ReadNode(reader, null, meshes);
this.Link(_root);
foreach (var anim in _anims.Values) {
this.Link(anim);
}
}
void Link(Node node) {
if (node.Meshes != null) {
foreach (var mesh in node.Meshes) {
mesh.Node = node;
if (mesh.Bones != null) {
foreach (var bone in mesh.Bones) {
bone.Node = (node.Parent ?? node).FindByName(bone.Name);
if (bone.Node == null)
throw new ContentException("Could not find bone node " + bone.Name);
bone.Node.Bone = bone;
}
}
}
}
if (node.Children != null) {
foreach (var child in node.Children)
this.Link(child);
}
}
Node ReadNode(BinaryReader reader, Node parent, Mesh[] meshes) {
var name = reader.ReadString();
Matrix4 transform;
reader.ReadMatrix4(out transform);
var meshCount = reader.ReadInt32();
Mesh[] meshList = null;
if(meshCount > 0) {
meshList = new Mesh[meshCount];
for (var i = 0; i < meshCount; i++) {
var idx = reader.ReadInt32();
if (idx < 0 || idx >= meshes.Length)
throw new ContentException("Invalid mesh index " + idx);
meshList[i] = meshes[idx];
}
}
var node = new Node(name, parent, ref transform, meshList);
var childCount = reader.ReadInt32();
Node[] children = null;
if(childCount > 0) {
children = new Node[childCount];
for (var i = 0; i < childCount; i++) {
children[i] = this.ReadNode(reader, node, meshes);
}
}
node.Children = children;
return node;
}