Optimize lua object push

* Optimize position hash
* Fix minimap reload

modules/game_minimap/minimap.lua

@@ -74,6 +74,7 @@ function Minimap.terminate()
   disconnect(g_game, { onGameStart = Minimap.reset })
   Keyboard.unbindKeyDown('Ctrl+M')
 
+  minimapButton:destroy()
   minimapWindow:destroy()
   minimapWindow = nil
   minimapWidget = nil

src/framework/luascript/luainterface.cpp

@@ -1052,8 +1052,7 @@ void LuaInterface::pushObject(const LuaObjectPtr& obj)
     new(newUserdata(sizeof(LuaObjectPtr))) LuaObjectPtr(obj);
     m_totalObjRefs++;
 
-    // set the userdata metatable
-    getGlobal(stdext::format("%s_mt", obj->getClassName()));
+    obj->luaGetMetatable();
     assert(!isNil());
     setMetatable();
 }

src/framework/luascript/luaobject.cpp

@@ -26,7 +26,8 @@
 #include <framework/application.h>
 
 LuaObject::LuaObject() :
-    m_fieldsTableRef(-1)
+    m_fieldsTableRef(-1),
+    m_metatableRef(-1)
 {
 }
 
@@ -34,6 +35,11 @@ LuaObject::~LuaObject()
 {
     assert(!g_app.isTermianted());
     releaseLuaFieldsTable();
+
+    if(m_metatableRef != -1) {
+        g_lua.unref(m_metatableRef);
+        m_metatableRef = -1;
+    }
 }
 
 bool LuaObject::hasLuaField(const std::string& field)
@@ -81,6 +87,17 @@ void LuaObject::luaGetField(const std::string& key)
     }
 }
 
+void LuaObject::luaGetMetatable()
+{
+    if(m_metatableRef == -1) {
+        // set the userdata metatable
+        g_lua.getGlobal(stdext::format("%s_mt", getClassName()));
+        m_metatableRef = g_lua.ref();
+    }
+
+    g_lua.getRef(m_metatableRef);
+}
+
 void LuaObject::luaGetFieldsTable()
 {
     if(m_fieldsTableRef != -1)

src/framework/luascript/luaobject.h

@@ -61,6 +61,9 @@ public:
     /// Gets a field from this lua object, the result is pushed onto the stack
     void luaGetField(const std::string& key);
 
+    /// Get object's metatable
+    void luaGetMetatable();
+
     /// Gets the table containing all stored fields of this lua object, the result is pushed onto the stack
     void luaGetFieldsTable();
 
@@ -78,6 +81,7 @@ public:
 
 private:
     int m_fieldsTableRef;
+    int m_metatableRef;
 };
 
 #include "luainterface.h"

src/otclient/util/position.h

@@ -214,7 +214,7 @@ public:
 
 struct PositionHasher : std::unary_function<Position, std::size_t> {
     std::size_t operator()(const Position& pos) const {
-        return ((((pos.x * 32768) + pos.y) * 16) + pos.z) % 1000000;
+        return ((((pos.x * 2048) + pos.y) * 16) + pos.z) % (2048*2048);
     }
 };