float3x3 Matrices_Texture;

texture ColorTexture : DIFFUSE <
    string ResourceName = "default_color.dds";
    string UIName =  "Diffuse Texture";
    string ResourceType = "2D";
>;

sampler2D ColorSampler = sampler_state {
    Texture = <ColorTexture>;
    FILTER = MIN_MAG_MIP_LINEAR;
    AddressU = Wrap;
    AddressV = Wrap;
};

struct vertexInput {
    float4 Position : POSITION0;
    float2 TextureCoordinates   : TEXCOORD0;
};

struct vertexOutput {
    float4 Position : POSITION0;
    float2 TextureCoordinates   : TEXCOORD0;
    float2 UV       : TEXCOORD1;
    float2 UVScale      : TEXCOORD2;
};


vertexOutput mainVS(vertexInput input)
{
    vertexOutput output;
    output.TextureCoordinates = mul(float3(input.TextureCoordinates, 1), Matrices_Texture).xy;
    output.UV = Matrices_Texture[2].xy;
    output.UVScale = float2(Matrices_Texture[0][0], Matrices_Texture[1][1]);
    output.Position = input.Position;
    return output;
}

float4 mainPS(vertexOutput input)  : COLOR0
{
    float2 tc = input.TextureCoordinates;
    tc = frac((tc - input.UV) / input.UVScale) * input.UVScale + input.UV;
    float4 sample = tex2D(ColorSampler, tc);
    return sample;
}

technique technique0 {
    pass p0 {
        CullMode = None;
        VertexShader = compile vs_3_0 mainVS();
        PixelShader = compile ps_3_0 mainPS();
    }
}