update world generation pipeline

src/logic/scripting/lua/lua_custom_types.hpp

@@ -39,6 +39,7 @@ namespace lua {
         std::shared_ptr<Heightmap> map;
         std::unique_ptr<fnl_state> noise;
     public:
+        LuaHeightmap(const std::shared_ptr<Heightmap>& map);
         LuaHeightmap(uint width, uint height);
 
         virtual ~LuaHeightmap();

src/logic/scripting/lua/usertypes/lua_type_heightmap.cpp

@@ -16,6 +16,10 @@
 
 using namespace lua;
 
+LuaHeightmap::LuaHeightmap(const std::shared_ptr<Heightmap>& map)
+ : map(map), noise(std::make_unique<fnl_state>(fnlCreateState())) {
+}
+
 LuaHeightmap::LuaHeightmap(uint width, uint height)
  : map(std::make_shared<Heightmap>(width, height)),
    noise(std::make_unique<fnl_state>(fnlCreateState()))