/// <inheritdoc/>
protected override void OnUpdate(RenderContext context)
{
if (context == null)
{
return;
}
var lightNode = SceneEffectBinder.GetLightNode <DirectionalLight>(this, context);
if (_standardShadowParameters != null)
{
_standardShadowParameters.StandardShadow = lightNode.Shadow as StandardShadow;
}
else if (_cascadedShadowParameters != null)
{
_cascadedShadowParameters.CascadedShadow = lightNode.Shadow as CascadedShadow;
}
}
protected override void OnUpdate(RenderContext context)
{
var stockEffectBinding = context.MaterialBinding as IStockEffectBinding;
if (stockEffectBinding == null)
{
throw new EffectBindingException("XNA stock effect binding not found in render context.");
}
// Fallback values.
Value = new Vector4(0, 0, 0, 0);
stockEffectBinding.FogEnabled = false;
if (context.CameraNode == null)
{
return;
}
var nodes = SceneEffectBinder.QueryFogNodes(context);
if (nodes == null)
{
return;
}
var node = nodes[0];
var fog = node.Fog;
if (Numeric.IsZero(fog.Density) || Numeric.IsZero(fog.Color0.W))
{
return;
}
Matrix worldView = SceneEffectBinder.GetWorldView(null, context);
float fogStart = fog.Start;
float fogEnd = fog.End;
// This how XNA uses its fog vector.
float x = 1f / (fogStart - fogEnd);
Value = new Vector4(worldView.M13 * x,
worldView.M23 * x,
worldView.M33 * x,
(worldView.M43 + fogStart) * x);
stockEffectBinding.FogEnabled = true;
}
