光照系統可以工作了。

光照系統可以工作了，新增加一個Const Buffer專用於傳遞光照相關的參數：ILightingEnvState.

做光照相對D9來說簡單了許多。不需要任何的setShaderParamter之類的調用了。

Simple.Lighting的shade Node 和用於光照的shader lib如下：

libLighting.hlsl:

struct xLightDesc
{
    float4 m_Diffuse;
    float4 m_Speculer;
    float4 m_Position;
    float4 m_dir;
};

cbuffer xLightState
{  
    int4       nLight;   
    xLightDesc m_Light[8];
}

float4 Phong_Lighting(float3 vNormal , float3 wPosition , float3 eyePosition)
{
   float4 vTotal  = float4(0.0f,0.0f,0.0f , 0.0f);
   for(int i = 0 ; i < nLight.x ; i ++ )
   {
      xLightDesc _desc = m_Light[i];
      float3 LightDirection = _desc.m_Position.xyz - wPosition;
     
      float3 fvLightDirection = normalize( LightDirection );
      float3 fvNormal         = normalize( vNormal );
      float  fNDotL           = dot( fvNormal, fvLightDirection );
  
      float3 fvReflection     = normalize( ( ( 2.0f * fvNormal ) * ( fNDotL ) ) - fvLightDirection );
      float3 fvViewDirection  = normalize( eyePosition -  wPosition);
      float  fRDotV           = max( 0.0f, dot( fvReflection, fvViewDirection ) );
     
      float4 fvTotalAmbient   = float4(0.0f,0.0f,0.0f,1.0f);
      float4 fvTotalDiffuse   = fNDotL * _desc.m_Diffuse;
      float4 fvTotalSpecular  = float4(_desc.m_Speculer.xyz , 1.0f) * pow( fRDotV, _desc.m_Speculer.w );
  
      vTotal += ( saturate( fvTotalAmbient + fvTotalDiffuse + fvTotalSpecular ) );
   }
   return vTotal;
}

 

//Simple.Lighting.hlsl

///{{Slot = Simple_Lighting
Input
{
     float4    Color          : COLOR0;
     float4    wNormal        : WNORMAL;
     float4    wPosition      : WPOSITION;
}

Output
{
     float4 color: COLOR0;
}
///}}

///>>Import = libLighting

///{{SourceCode
float4 Simple_Lighting(float4 _Color , float4 wNormal , float4    wPosition)
{
      float4 eyePositon = float4(0.0f,0.0f,0.0f,1.0f);
      return _Color * Phong_Lighting(wNormal.xyz , wPosition.xyz , eyePositon.xyz );
}
///}}

截個圖留念一下。