public virtual void PrepareScene()
{
if (!Nodes.OfType<Camera>().Any())
throw new Exception("No camera in scene");
Camera = Nodes.OfType<Camera>().First();
Camera.PrepareCamera();
Lights = Nodes.OfType<Light>().ToList();
Geomertries = new List<Geomertry>();
foreach (Texture texture in Textures)
{
texture.PrepareTexture();
}
foreach (var geometry in Nodes.OfType<MeshGeometry>())
{
foreach (Triangle triangle in geometry.Triangles)
{
triangle.Transform = geometry.Scale*geometry.Rotation*geometry.Translation;
triangle.Prepare();
Geomertries.Add(triangle);
}
}
if (UseOptimisation && Geomertries.Any())
{
BuildTree();
}
}
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 ReadCameraInfo(Camera camera, string url)
{
XElement instanceElement = _document.XPathSelectElement(string.Format("//c:library_cameras/c:camera[@id='{0}']", url), _nsMgr);
XElement cameraElement = instanceElement.XPathSelectElement("c:optics/c:technique_common/c:perspective", _nsMgr);
camera.Fov = cameraElement.Element(Ns + "xfov").Value.ToFloat();
}
