/// <summary>
/// Checks if an object is visible and adds it to the render queue
/// </summary>
/// <param name="camera">Current camera</param>
/// <param name="movable">IMovable instance</param>
internal void ProcessesVisibleObject(Camera camera, IMovable movable)
{
movable.FrustumCulling(camera);
if (movable.IsRendered)
movable.UpdateRenderQueue(this);
}
/// <summary>
/// Add a camera to the manager
/// </summary>
/// <param name="name">Name of the camera</param>
public Camera CreateCamera(string name)
{
Camera cam;
if (_cameras.TryGetValue(name, out cam)) return cam;
cam = new Camera(name, _owner);
_cameras.Add(name, cam);
return cam;
}
/// <summary>
/// Performs a frustum culling against a specified camera
/// </summary>
/// <param name="camera">Camera</param>
public virtual void FrustumCulling(Camera camera)
{
_inCameraSight = camera.Frustum.Intersect(_worldAabb);
}
/// <summary>
/// <remarks>Not supported for the Camera class </remarks>
/// </summary>
/// <param name="camera">Camera</param>
void IMovable.FrustumCulling(Camera camera)
{
throw new NotSupportedException();
}
/// <summary>
/// Renders a scene graph into a viewport
/// </summary>
/// <param name="vp">Viewport in which the rendering is sent</param>
/// <param name="cam">Camera representing the point of view</param>
/// <param name="queue">Queue of objects to render</param>
internal void Render(Viewport vp, Camera cam, RenderQueue queue)
{
BeginRender();
_renderingTechnique.Render(vp, cam, queue);
EndRender();
}
/// <summary>
/// Remove a camera
/// </summary>
/// <param name="camera">Camera to remove</param>
/// <returns>Return true if the camera was removed, otherwise false</returns>
public bool RemoveCamera(Camera camera)
{
return _cameras.Remove(camera.Name);
}
/// <summary>
/// Finds all the visible objects in the scene
/// </summary>
/// <param name="cam">Current camera</param>
private void FindVisibleObjects(Camera cam)
{
_root.FindVisibleObjects(cam, _queue, true);
}
/// <summary>
/// Draws the entire scene
/// </summary>
public void RenderScene(Viewport vp, Camera cam)
{
Clean();
UpdateGraph();
FindVisibleObjects(cam);
_renderer.Render(vp, cam, _queue);
}
/// <summary>
/// Finds all visible objects attached to this scene node
/// </summary>
/// <param name="cam">Current camera</param>
/// <param name="queue">Current render queue</param>
/// <param name="addChildren">Boolean indicating if the search goes through childrens</param>
internal void FindVisibleObjects(Camera cam, RenderQueue queue, bool addChildren)
{
for (int i = 0; i < _movablesList.Count; i++)
queue.ProcessesVisibleObject(cam, _movablesList[i]);
if (addChildren)
{
for (int j = 0; j < Childrens.Count; j++)
((SceneNode)Childrens[j]).FindVisibleObjects(cam, queue, true);
}
}