2010년managed directx의 15

struct VS_IN {
    float4 Pos: POSITION;
    float4 color: COLOR;
};
struct VS_OUT {
    float4 Pos: POSITION;
    float4 color: COLOR;
    float2 coord: TEXCOORD;
};
VS_OUT VSmain(VS_IN In)
{
    VS_OUT output = (VS_OUT) 0;
    output.Pos = In.Pos;
    output.color = In.color;
    output.coord = In.Pos.xy;
    return output;
}
float4 PSmain(VS_OUT In): COLOR
{
    float4 color = float4(1.0, 1.0, 1.0, 1.0);
    float2 coord = In.coord;
    float2 center = float2(0.0, 0.0);
    float dist = distance(coord, center);
    if (dist < 0.5) color = float4(1.0, 1.0, 1.0, 1.0);
    else color = In.color;
    return color;
}

technique MyTechnique
{
    pass MyPass
    {
        VertexShader = compile vs_2_0 VSmain();
        PixelShader = compile ps_2_0 PSmain();
    }
}