float4x4 gWorldViewProj : WorldViewProjection;
float4x4 gWorldMatrix : WorldMatrix;
SamplerState gSampleState : SampleState;

texture2D gDiffuseMap : DiffuseMap;

//Input output
struct VS_INPUT {
    float3 Position : POSITION;
    float2 TexCoord : TEXCOORD;
    float3 Normal : NORMAL;
    float3 Tangent : TANGENT;
};



struct VS_OUTPUT {
    float4 Position : SV_POSITION;
    float4 WorldPosition : WORLDPOSITION;
    float2 TexCoord : TEXCOORD;
    float3 Normal : NORMAL;
    float3 Tangent : TANGENT;
};


//----------------------
//  Rasterizer state
//----------------------
RasterizerState gRasterizerState
{
    CullMode = none;
    FrontCounterClockwise = false; //default
};

//----------------------
// Blend state
//----------------------
BlendState gBlendState
{
    BlendEnable[0] = true;
    SrcBlend = SRC_ALPHA;
    DestBlend = INV_SRC_ALPHA;
    BlendOp = ADD;
    SrcBlendAlpha = ZERO;
    DestBlendAlpha = ZERO;
    BlendOpAlpha = ADD;
    RenderTargetWriteMask[0] = 0x0F;
};

//----------------------
//  SamplerState
//----------------------
SamplerState samPoint
{
    Filter = MIN_MAG_MIP_POINT;
    Addressu = Wrap; //or Mirror, Clamp, Border
    AddressV = Wrap; //or Mirror, Clamp, Border
};

DepthStencilState gDepthStencilState
{
    DepthEnable = true;
    DepthWriteMask = ZERO;
    DepthFunc = LESS;
    StencilEnable = false;
};


//Vertex shader
VS_OUTPUT VS(VS_INPUT input){
    VS_OUTPUT output = (VS_OUTPUT)0;

    output.Position = mul(float4(input.Position, 1.f), gWorldViewProj);
    output.WorldPosition = mul(float4(input.Position, 1.f), gWorldMatrix);
    output.TexCoord = input.TexCoord;
    output.Normal = mul(input.Normal, (float3x3) gWorldMatrix);
    output.Tangent = mul(input.Tangent, (float3x3) gWorldMatrix);

    return output;
}

float4 PS(VS_OUTPUT input) : SV_TARGET{
    return gDiffuseMap.Sample(gSampleState, input.TexCoord);
}


technique11 DefaultTechnique{
    pass P0 {
        SetRasterizerState(gRasterizerState);
        SetDepthStencilState(gDepthStencilState, 0);
        SetBlendState(gBlendState, float4(0.0f, 0.0f, 0.0f, 0.0f), 0xFFFFFFFF);
        SetVertexShader( CompileShader( vs_5_0, VS() ) );
        SetGeometryShader( NULL );
        SetPixelShader( CompileShader( ps_5_0, PS() ) );
    }
}