namespace VoxelEngine.World.WorldGen;

// Deterministic 32-bit mixing hash for worm-cell coordinates.
// Cell coords can be negative; cast through unchecked to preserve bit pattern.
internal static class WormHash
{
    public static uint Hash(int cellX, int cellY, int cellZ, int seed)
    {
        unchecked
        {
            uint h = (uint)seed;
            h ^= (uint)cellX * 73856093u;
            h ^= (uint)cellY * 19349663u;
            h ^= (uint)cellZ * 83492791u;
            h ^= h >> 13;
            h *= 0x5bd1e995u;
            h ^= h >> 15;
            return h;
        }
    }
}