[radiobutton]

VertexOutput MainVS(VertexInput input)
{
    VertexOutput output;
    output.pos = float4(input.pos, 1.0f);
    output.color = input.color;
    return output;
}

VertexOutput MainVS(VertexInput a)
{
    VertexOutput b;
    b.pos = float4(a.pos, 1.0f);
    b.color = a.color;
    return b;
}