struct V2P {
    float4 pos : SV_Position;
    nointerpolation uint id : TEXCOORD0; 
    nointerpolation uint4 raw_bits : TEXCOORD1; 
};

cbuffer CB2 : register(b2) { float4 cb2_data[4096]; };

V2P main(uint id : SV_VertexID) {
    V2P o;
    // 64x64 紧凑点阵，绝对防止视锥体剔除 (NDC空间内)
    float x = -0.98 + (id % 64) * 0.03;
    float y = -0.98 + (id / 64) * 0.03;
    o.pos = float4(x, y, 0.5, 1.0);
    o.id = id;
    
    o.raw_bits = asuint(cb2_data[id]); 
    return o;
}