source: GTP/trunk/App/Demos/Geom/OgreStuff/media/materials/programs/Example_Basic.cg @ 1092

/*
  Basic ambient lighting vertex program
*/
void ambientOneTexture_vp(float4 position : POSITION,
                                                  float2 uv               : TEXCOORD0,
                                                  
                                                  out float4 oPosition : POSITION,
                                                  out float2 oUv           : TEXCOORD0,
                                                  out float4 colour    : COLOR,

                                                  uniform float4x4 worldViewProj,
                                                  uniform float4 ambient)
{
        oPosition = mul(worldViewProj, position);
        oUv = uv;
        colour = ambient;
}

/*
  Single-weight-per-vertex hardware skinning, 2 lights
  The trouble with vertex programs is they're not general purpose, but
  fixed function hardware skinning is very poorly supported
*/
void hardwareSkinningOneWeight_vp(
        float4 position : POSITION,
        float3 normal   : NORMAL,
        float2 uv       : TEXCOORD0,
        float  blendIdx : BLENDINDICES,
        

        out float4 oPosition : POSITION,
        out float2 oUv       : TEXCOORD0,
        out float4 colour           : COLOR,
        // Support up to 24 bones of float3x4
        // vs_1_1 only supports 96 params so more than this is not feasible
        uniform float3x4   worldMatrix3x4Array[24],
        uniform float4x4 viewProjectionMatrix,
        uniform float4   lightPos[2],
        uniform float4   lightDiffuseColour[2],
        uniform float4   ambient)
{
        // transform by indexed matrix
        float4 blendPos = float4(mul(worldMatrix3x4Array[blendIdx], position).xyz, 1.0);
        // view / projection
        oPosition = mul(viewProjectionMatrix, blendPos);
        // transform normal
        float3 norm = mul((float3x3)worldMatrix3x4Array[blendIdx], normal);
        // Lighting - support point and directional
        float3 lightDir0 =      normalize(
                lightPos[0].xyz -  (blendPos.xyz * lightPos[0].w));
        float3 lightDir1 =      normalize(
                lightPos[1].xyz -  (blendPos.xyz * lightPos[1].w));

        oUv = uv;
        colour = ambient + 
                (saturate(dot(lightDir0, norm)) * lightDiffuseColour[0]) + 
                (saturate(dot(lightDir1, norm)) * lightDiffuseColour[1]);
        
}       

/*
  Single-weight-per-vertex hardware skinning, shadow-caster pass
*/
void hardwareSkinningOneWeightCaster_vp(
        float4 position : POSITION,
        float3 normal   : NORMAL,
        float  blendIdx : BLENDINDICES,
        

        out float4 oPosition : POSITION,
        out float4 colour    : COLOR,
        // Support up to 24 bones of float3x4
        // vs_1_1 only supports 96 params so more than this is not feasible
        uniform float3x4   worldMatrix3x4Array[24],
        uniform float4x4 viewProjectionMatrix,
        uniform float4   ambient)
{
        // transform by indexed matrix
        float4 blendPos = float4(mul(worldMatrix3x4Array[blendIdx], position).xyz, 1.0);
        // view / projection
        oPosition = mul(viewProjectionMatrix, blendPos);
        
        colour = ambient;
        
}       

/*
  Four-weight-per-vertex hardware skinning, 2 lights
  The trouble with vertex programs is they're not general purpose, but
  fixed function hardware skinning is very poorly supported
*/
void hardwareSkinningFourWeights_vp(
        float4 position : POSITION,
        float3 normal   : NORMAL,
        float2 uv       : TEXCOORD0,
        float4 blendIdx : BLENDINDICES,
        float4 blendWgt : BLENDWEIGHT,
        

        out float4 oPosition : POSITION,
        out float2 oUv       : TEXCOORD0,
        out float4 colour           : COLOR,
        // Support up to 24 bones of float3x4
        // vs_1_1 only supports 96 params so more than this is not feasible
        uniform float3x4   worldMatrix3x4Array[24],
        uniform float4x4 viewProjectionMatrix,
        uniform float4   lightPos[2],
        uniform float4   lightDiffuseColour[2],
        uniform float4   ambient)
{
        // transform by indexed matrix
        float4 blendPos = float4(0,0,0,0);
        int i;
        for (i = 0; i < 4; ++i)
        {
                blendPos += float4(mul(worldMatrix3x4Array[blendIdx[i]], position).xyz, 1.0) * blendWgt[i];
        }
        // view / projection
        oPosition = mul(viewProjectionMatrix, blendPos);
        // transform normal
        float3 norm = float3(0,0,0);
        for (i = 0; i < 4; ++i)
        {
                norm += mul((float3x3)worldMatrix3x4Array[blendIdx[i]], normal) * 
                blendWgt[i];
        }
        norm = normalize(norm);
        // Lighting - support point and directional
        float3 lightDir0 =      normalize(
                lightPos[0].xyz -  (blendPos.xyz * lightPos[0].w));
        float3 lightDir1 =      normalize(
                lightPos[1].xyz -  (blendPos.xyz * lightPos[1].w));

        
        oUv = uv;
        colour = ambient + 
                (saturate(dot(lightDir0, norm)) * lightDiffuseColour[0]) + 
                (saturate(dot(lightDir1, norm)) * lightDiffuseColour[1]);
        
}