ChunkPos.h

#pragma once
 
#include "ll/api/utils/HashUtils.h"
#include "mc/_HeaderOutputPredefine.h"
#include "mc/deps/core/math/Vec3.h"
#include "mc/world/level/BlockPos.h"
 
// clang-format off
class BlockPos;
class Vec3;
// clang-format on
 
class alignas(uint64) ChunkPos : public ll::math::intN2<ChunkPos> {
public:
    template <std::floating_point T0, std::floating_point T1>
    [[nodiscard]] constexpr ChunkPos(T0 x, T1 z)
    : intN2((static_cast<int>(std::floor(x)) >> 4), (static_cast<int>(std::floor(z)) >> 4)) {}
 
    using intN2::intN2;
 
    ChunkPos(BlockPos const& bp) {
        x = bp.x >> 4;
        z = bp.z >> 4;
    }
 
    ChunkPos(Vec3 const& pos) {
        x = static_cast<int>(floorf(pos.x)) >> 4;
        z = static_cast<int>(floorf(pos.z)) >> 4;
    }
 
public:
    // static variables
    // NOLINTBEGIN
    MCAPI static ::ChunkPos const& INVALID();
 
    MCAPI static ::ChunkPos const& MAX();
 
    MCAPI static ::ChunkPos const& MIN();
 
    MCAPI static ::ChunkPos const& ONE();
    // NOLINTEND
};
 
namespace std {
template <>
struct hash<ChunkPos> {
    size_t operator()(ChunkPos const& pos) const noexcept {
        return ll::hash_utils::HashCombiner{}.add(pos.x).add(pos.z);
    }
};
} // namespace std