#pragma pack_matrix(row_major)

cbuffer CBPerObj : register(b2) {
    row_major float4x4 gWorld;
    row_major float4x4 gWorldInvTranspose; // 深度阶段不用，但保持 CPU 布局契约一致
};

cbuffer CBShadow : register(b3) {
    row_major float4x4 gLightViewProjection;
    float4 gShadowParams;
};

struct VSInput {
    float3 positionOS : POSITION;
};

float4 VSMain(VSInput input) : SV_POSITION {
    const float4 positionWS = mul(float4(input.positionOS, 1.0f), gWorld);
    return mul(positionWS, gLightViewProjection);
}