/// <inheritdoc/>
public float4 Execute()
{
float2 position = D2D.GetScenePosition().XY;
uint x = (uint)Hlsl.Floor(position.X);
uint y = (uint)Hlsl.Floor(position.Y);
uint cellX = (uint)(int)Hlsl.Floor(x / cellSize);
uint cellY = (uint)(int)Hlsl.Floor(y / cellSize);
if ((cellX % 2 == 0 && cellY % 2 == 0) ||
(cellX % 2 == 1 && cellY % 2 == 1))
{
Hlsl.Clip(-1);
}
return(D2D.GetInput(0));
}