1 files changed, 44 insertions, 0 deletions
diff --git a/game/shared/types.hh b/game/shared/types.hh
new file mode 100644
index 0000000..dace85e
--- /dev/null
+++ b/game/shared/types.hh
@@ -0,0 +1,44 @@
+#ifndef SHARED_TYPES_HH
+#define SHARED_TYPES_HH 1
+#pragma once
+
+using item_id = std::uint32_t;
+constexpr static item_id NULL_ITEM_ID = UINT32_C(0x00000000);
+constexpr static item_id MAX_ITEM_ID = UINT32_C(0xFFFFFFFF);
+
+using voxel_id = std::uint16_t;
+constexpr static voxel_id NULL_VOXEL_ID = UINT16_C(0x0000);
+constexpr static voxel_id MAX_VOXEL_ID = UINT16_C(0xFFFF);
+
+using chunk_pos = glm::vec<3, std::int32_t>;
+using local_pos = glm::vec<3, std::int16_t>;
+using voxel_pos = glm::vec<3, std::int64_t>;
+
+// A special 2D chunk coordinate used by world generation code
+// to cache things like 2D noise and terrain heightmap for performance reasons
+using worldgen_chunk_pos = glm::vec<2, chunk_pos::value_type>;
+
+template<>
+struct std::hash<chunk_pos> final {
+    constexpr inline std::size_t operator()(const chunk_pos &cpos) const
+    {
+        std::size_t value = 0;
+        value ^= cpos.x * 73856093;
+        value ^= cpos.y * 19349663;
+        value ^= cpos.z * 83492791;
+        return value;
+    }
+};
+
+template<>
+struct std::hash<worldgen_chunk_pos> final {
+    constexpr inline std::size_t operator()(const worldgen_chunk_pos &cwpos) const
+    {
+        std::size_t value = 0;
+        value ^= cwpos.x * 73856093;
+        value ^= cwpos.y * 19349663;
+        return value;
+    }
+};
+
+#endif /* SHARED_TYPES_HH */