src/world: cleanup & fix hash stuff

1 files changed, 3 insertions, 2 deletions

diff --git a/src/world.cpp b/src/world.cpp
index f0818b44..028ddd45 100644
--- a/src/world.cpp
+++ b/src/world.cpp
@@ -2,6 +2,7 @@
 #include "chunk.hpp"
 #include "entity.hpp"
 #include "compat/int-hash.hpp"
+#include "compat/exception.hpp"
 
 using namespace floormat;
 
@@ -12,9 +13,9 @@ size_t std::hash<chunk_coords_>::operator()(const chunk_coords_& coord) const no
     x |= size_t(uint16_t(coord.y)) << 16;
     x |= size_t(uint16_t(coord.x));
     if constexpr(sizeof(size_t) > 4)
-        x |= size_t(uint8_t(coord.z+8) & 0xf) << 20;
+        x |= size_t(uint8_t(coord.z-chunk_min_z) & 0xf) << 32;
     else
-        x ^= size_t(uint8_t(coord.z+8) & 0xf) * size_t(1664525);
+        x ^= size_t(uint8_t(coord.z-chunk_min_z) & 0xf) * size_t(1664525);
 
     return int_hash(x);
 }