FactoryCraft-Client/FactoryCraft/ChunkClosestHit.hlsl

#include "Common.hlsl"

[shader("closesthit")]
void ChunkClosestHit(inout RayHits currentPayload, ChunkHitAttributes attrib)
{
    if (currentPayload.hitCount == 0)
    {
        return; // already inside of shadow ray
    }
    RayHits tmpPayload;
    // shadow rays
    for (int i = 0; i < currentPayload.hitCount; i++)
    {
        tmpPayload.hitCount = -1; // shadow ray
        RayDesc ray;
        ray.Origin = WorldRayOrigin() + (currentPayload.hits[i].distance - 0.001) * WorldRayDirection();
        ray.Direction = dayLightDirection;
        ray.TMin = 0.00001;
        ray.TMax = 1000;
        TraceRay(TLAS,
            0, 0xFF, 0,
           0, 0, ray, tmpPayload);
        float normalFactor = saturate(dot(normalize(currentPayload.hits[i].normal), normalize(dayLightDirection)));
        float3 color = unpackLight(currentPayload.hits[i].dayLight) * dayLightFactor;
        if (tmpPayload.hitCount == 0)
        {
            color = color / 2;
        }
        else
        {
            color = dayLightFactor * (0.5 + normalFactor / 2);
        }
        currentPayload.hits[i].dayLight = packLight(color);
    }
    // TODO: reflection rays
}