// Hit information, aka ray payload
// This sample only carries a shading color and hit distance.
// Note that the payload should be kept as small as possible,
// and that its size must be declared in the corresponding
// D3D12_RAYTRACING_SHADER_CONFIG pipeline subobjet.

#pragma pack_matrix(row_major)
#define MAX_TRANSPACENT_HITS 5

struct [raypayload] HitInfo
{
    float4 color[MAX_TRANSPACENT_HITS] : write(caller, closesthit, anyhit, miss) : read(caller, anyhit, closesthit, miss);
float distance[MAX_TRANSPACENT_HITS] : write(caller, closesthit, anyhit) : read(caller, anyhit, closesthit);
uint hitCount : write(caller, anyhit, closesthit, miss) : read(caller, anyhit, closesthit, miss);
};

// Attributes output by the raytracing when hitting a surface,
// here the barycentric coordinates
struct Attributes
{
    float2 bary;
};