texture sPicTexture;
texture sMaskTexture;
float2 gUVPrePosition = float2(0, 0);
float2 gUVScale = float2(1, 1);            // ESCALA DA TELA
float2 gUVScaleCenter = float2(0.5, 0.5);  // CENTRO DA ESCALA (NAO MEXER SE NAO FOR NECESSÁRIO)
float gUVRotAngle = 0;                     // ROTACAO DA TEXTURA
float2 gUVRotCenter = float2(0.5, 0.5);    // CENTRO DA ROTACAO DA TESXTURA
float2 gUVPosition = float2(0, 0);         // POSICAO FINAL (DRAW SECTION)

float3x3 computeTextureTransform()
{
    float s = sin(gUVRotAngle);
    float c = cos(gUVRotAngle);

    float3x3 translationMatrix = float3x3(
        1, 0, 0,
        0, 1, 0,
        gUVPosition.x + gUVPrePosition.x, gUVPosition.y + gUVPrePosition.y, 1
    );

    float3x3 rotationMatrix = float3x3(
        c, s, 0,
        -s, c, 0,
        gUVRotCenter.x * (1 - c) + gUVRotCenter.y * s, 
        gUVRotCenter.y * (1 - c) - gUVRotCenter.x * s, 1
    );

    float3x3 scaleMatrix = float3x3(
        gUVScale.x, 0, 0,
        0, gUVScale.y, 0,
        gUVScaleCenter.x * (1 - gUVScale.x), 
        gUVScaleCenter.y * (1 - gUVScale.y), 1
    );

    return mul(translationMatrix, mul(rotationMatrix, scaleMatrix));
}

technique HudMaskTechnique
{
    pass P0
    {
        Texture[0] = sPicTexture;
        TextureTransform[0] = computeTextureTransform();
        TextureTransformFlags[0] = Count2;
        AddressU[0] = Clamp;
        AddressV[0] = Clamp;
        ColorOp[0] = Modulate;
        ColorArg1[0] = Texture;
        ColorArg2[0] = Diffuse;
        AlphaOp[0] = Modulate;
        AlphaArg1[0] = Texture;
        AlphaArg2[0] = Diffuse;
        Texture[1] = sMaskTexture;
        TexCoordIndex[1] = 0;
        AddressU[1] = Clamp;
        AddressV[1] = Clamp;
        ColorOp[1] = SelectArg1;
        ColorArg1[1] = Current;
        AlphaOp[1] = Modulate;
        AlphaArg1[1] = Current;
        AlphaArg2[1] = Texture;
        ColorOp[2] = Disable;
        AlphaOp[2] = Disable;
    }
}