History: Velvet X-ray Shader

            {maketoc}

!!Description
Velvet shader similar to mario galaxy for apply to your materials.

{img src="http://1.bp.blogspot.com/_T3v6MeTacF8/S5aXF0_5wJI/AAAAAAAAAEQ/2P7y9ZNymQo/s400/rtLooney.jpg" alt="velvet_shader.jpg"}

!!Usage
Just give the material __shader/velvet__ to your object.


!!velvetshader.cg
{CODE(wrap="1", colors="c++")} // -----------------------------------------------------------
     void main_vs(
             float4 position : POSITION,
             float3 normal   : NORMAL,   
             float2 texCoord : TEXCOORD0,
             
             out float4 outPosition :    POSITION,         
             out float2 outTexCoord :    TEXCOORD0,
             out float3 outVertexPos   :    TEXCOORD1,
             out float3 outNormal :       TEXCOORD2,         
             
             uniform float4x4 worldViewProjMatrix,
             uniform float4x4 worldViewMatrix
             )
    {
       outTexCoord = texCoord;   
       outPosition = mul(worldViewProjMatrix, position);
       outVertexPos = mul(worldViewMatrix, position).xyz;
       outNormal = normal;   
    }


    void main_ps(
          float2 uv :         TEXCOORD0,      
          float3 position :   TEXCOORD1,
          float3 normal :      TEXCOORD2,
          
          out float4 outColor   : COLOR,      
          
          uniform sampler2D texture,
          uniform float3 eyePosition)
    {   
       float3 N = normalize(normal);
       float3 eyeDir = normalize(eyePosition - position.xyz);   
       
       outColor = tex2D(texture,uv);
       outColor += 1-saturate( dot(eyeDir,N) *2 );  
    }

{CODE}
!!velvetshader.material

{CODE(wrap="1", colors="c++")} 
    vertex_program velvetshader_vs cg
    {
       source velvetshader.cg
       entry_point main_vs
       profiles vs_1_1 arbvp1
    }

    fragment_program velvetshader_ps cg
    {
       source velvetshader.cg
       entry_point main_ps
       profiles ps_2_0 arbfp1
    }


    material test3
    {
       technique
       {
          pass
          {   

             vertex_program_ref velvetshader_vs
             {
                param_named_auto worldViewProjMatrix worldviewproj_matrix
             }
             
             fragment_program_ref velvetshader_ps
             {   
                param_named_auto eyePosition camera_position_object_space
             }
             
             texture_unit
             {            
                texture blue_jaiqua.jpg 2d      
             }

          }
          
       }
    }
{CODE}