// XC_BUILTIN_INFINITE_GRID_D3D12_VS
cbuffer GridConstants : register(b0) {
    float4x4 gViewProjectionMatrix;
    float4 gCameraPositionAndScale;
    float4 gCameraRightAndFade;
    float4 gCameraUpAndTanHalfFov;
    float4 gCameraForwardAndAspect;
    float4 gViewportNearFar;
    float4 gGridTransition;
};

struct VSOutput {
    float4 position : SV_POSITION;
};

VSOutput MainVS(uint vertexId : SV_VertexID) {
    static const float2 positions[3] = {
        float2(-1.0, -1.0),
        float2(-1.0,  3.0),
        float2( 3.0, -1.0)
    };

    VSOutput output;
    output.position = float4(positions[vertexId], 0.0, 1.0);
    return output;
}