protected override void PrepareCore(RenderDrawContext context, RenderItemCollection opaqueList, RenderItemCollection transparentList)
{
var uiProcessor = SceneInstance.GetProcessor <UIComponentProcessor>();
if (uiProcessor == null)
{
return;
}
foreach (var uiRoot in uiProcessor.UIRoots)
{
// Perform culling on group and accept
if (!CurrentCullingMask.Contains(uiRoot.UIComponent.Entity.Group))
{
continue;
}
// skips empty UI elements
if (uiRoot.UIComponent.RootElement == null)
{
continue;
}
// Project the position
// TODO: This code is duplicated from SpriteComponent -> unify it at higher level?
var worldPosition = new Vector4(uiRoot.TransformComponent.WorldMatrix.TranslationVector, 1.0f);
float projectedZ;
if (uiRoot.UIComponent.IsFullScreen)
{
projectedZ = -uiRoot.TransformComponent.WorldMatrix.M43;
}
else
{
Vector4 projectedPosition;
var cameraComponent = context.Tags.Get(CameraComponentRendererExtensions.Current);
if (cameraComponent == null)
{
continue;
}
Vector4.Transform(ref worldPosition, ref cameraComponent.ViewProjectionMatrix, out projectedPosition);
projectedZ = projectedPosition.Z / projectedPosition.W;
}
transparentList.Add(new RenderItem(this, uiRoot, projectedZ));
}
}
protected override void PrepareCore(RenderContext context, RenderItemCollection opaqueList, RenderItemCollection transparentList)
{
var backgroundProcessor = SceneInstance.GetProcessor <BackgroundComponentProcessor>();
if (backgroundProcessor == null)
{
return;
}
foreach (var backgroundComponent in backgroundProcessor.Backgrounds)
{
// Perform culling on group and accept
if (!CurrentCullingMask.Contains(backgroundComponent.Entity.Group))
{
continue;
}
opaqueList.Add(new RenderItem(this, backgroundComponent, float.NegativeInfinity)); // render background first so that it can replace a clear frame
return; // draw only one background by group
}
}