struct Input_ {
    float4 position_ : POSITION;
    float3 normal_ : NORMAL;
    float4 color_ : DIFFUSE;
};

struct Output_ {
    float4 projected_ : POSITION;
    float4 color_ : COLOR0;
    float3 normal_ : TEXCOORD0;
    float3 light_ : TEXCOORD1;
    float3 camera_ : TEXCOORD2;
};

Output_ main(
    in Input_ input,
    uniform float4x4 mvp,
    uniform float4x4 mv,
    uniform float4x4 v,
    uniform float3 light
) {
    Output_ output;
    output.projected_ = mul(mvp, input.position_);
    output.color_ = input.color_;
    output.camera_ = -mul(mv, input.position_).xyz;
    output.light_ = -normalize(output.camera_ + (float3) mul(v, float4(light, 1)));
    output.camera_ = normalize(output.camera_);
    output.normal_ = mul(mv, float4(input.normal_, 0)).xyz;
    return output;
}