Implementing Deferred Rendering - Direct3D Rendering - page 355

8. First let's add the following C# light type enumeration and PerLight constant buffer

structure for use in our renderer.
public enum LightType : uint
{
Ambient = 0,
Directional = 1,
Point = 2,
}
[StructLayout(LayoutKind.Sequential)]
public struct PerLight
{
public Vector3 Direction;
public LightType Type;
public Vector3 Position;
public float Range;
public Color4 Color;
}

9. Declare the LightRenderer class and add the following private and public

member fields:
public class LightRenderer: Common.RendererBase
{
#region Initialized by CreateDeviceDepenedentResources
// PerLight constant buffer
Buffer perLightBuffer;

// Light texture and its RTV and SRV
Texture2D lightBuffer;
RenderTargetView RTV;
public ShaderResourceView SRV;

VertexShader vertexShader;
PixelShader psAmbientLight;
PixelShader psDirectionalLight;
PixelShader psPointLight;

RasterizerState rsCullBack;
RasterizerState rsCullFront;
RasterizerState rsWireframe;

// Additive blend state
BlendState blendStateAdd;