private void LoadScene()
{
XElement sceneElement = _document.XPathSelectElement("//c:library_visual_scenes/c:visual_scene", _nsMgr);
_scene = new Scene
{
Id = sceneElement.Attribute("id").Value,
Name = sceneElement.Attribute("name").Value
};
foreach (var nodeElement in sceneElement.Elements(Ns + "node"))
{
XElement instanceElement = nodeElement.XPathSelectElement("*[contains(local-name(),'instance_')]", _nsMgr);
string instanceType = instanceElement.Name.LocalName;
string instanceUrl = instanceElement.Attribute("url").Value.Substring(1);
switch (instanceType)
{
case "instance_camera":
{
Camera camera = new Camera();
ReadNodeInfo(camera, nodeElement);
ReadNodeTransform(camera, nodeElement);
ReadCameraInfo(camera, instanceUrl);
_scene.Nodes.Add(camera);
break;
}
case "instance_light":
{
Light light = ReadLight(instanceUrl);
ReadNodeInfo(light, nodeElement);
ReadNodeTransform(light, nodeElement);
_scene.Nodes.Add(light);
break;
}
case "instance_geometry":
{
MeshGeometry mesh = new MeshGeometry();
ReadNodeInfo(mesh, nodeElement);
ReadNodeTransform(mesh, nodeElement);
ReadMesh(mesh, instanceUrl);
_scene.Nodes.Add(mesh);
break;
}
}
}
}
private void ReadMesh(MeshGeometry mesh, string url)
{
XElement instanceElement = _document.XPathSelectElement(string.Format("//c:library_geometries/c:geometry[@id='{0}']", url), _nsMgr);
XElement meshElement = instanceElement.XPathSelectElement("c:mesh", _nsMgr);
XElement polylistElement = meshElement.Element(Ns + "polylist");
string verticesSourceId = meshElement.XPathSelectElement("c:vertices/c:input", _nsMgr).Attribute("source").Value.Substring(1);
string normalsSourceId = polylistElement.XPathSelectElement("c:input[@semantic='NORMAL']", _nsMgr).Attribute("source").Value.Substring(1);
float[] vertices = ReadMeshData(meshElement, verticesSourceId);
float[] normals = ReadMeshData(meshElement, normalsSourceId);
float[] texcoord = null;
XElement texCoordElement = polylistElement.XPathSelectElement("c:input[@semantic='TEXCOORD']", _nsMgr);
if (texCoordElement != null)
{
string texcoordSourceId = texCoordElement.Attribute("source").Value.Substring(1);
texcoord = ReadMeshData(meshElement, texcoordSourceId);
}
int[] vertexCounts = polylistElement.Element(Ns + "vcount").Value.ToIntArray();
int[] poligonIndexes = polylistElement.Element(Ns + "p").Value.ToIntArray();
string materialId = polylistElement.GetAttributeValue("material", false);
Material material = ReadMaterial(materialId);
mesh.BuildMesh(vertexCounts, poligonIndexes, vertices, normals, texcoord, material);
}
