// 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);
int dayLight[MAX_TRANSPACENT_HITS] : write(caller, closesthit, anyhit) : read(caller, anyhit, closesthit);
int dynamicLight[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 texCoord;
    int textureId;
    int dayLight;
    int dynamicLight;
};

struct SimpleBlocksAttributes
{
    float2 bary;
};

uint packLight(float3 light)
{
    uint r = (uint) (light.r * 255.0) & 0xFF;
    uint g = (uint) (light.g * 255.0) & 0xFF;
    uint b = (uint) (light.b * 255.0) & 0xFF;
    return (r << 16) | (g << 8) | b;
}

float3 unpackLight(int light)
{
    float r = ((light >> 16) & 0xFF) / 255.0f;
    float g = ((light >> 8) & 0xFF) / 255.0f;
    float b = (light & 0xFF) / 255.0f;
    return float3(r, g, b);
}