client: the player's own character walks through buildings and blocked cells

The server checks a move only for its distance and speed, so the local
character skips the background-object and map-attribute collision.
Other characters and doors still block it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/port/UserInterface/InstanceBaseBattle.cpp

@@ -605,6 +605,10 @@ BOOL CInstanceBase::CheckAdvancing()
 	}
 
 	// 맵속성 체크
+	// PORT: nor does the player's own character stop at blocked map cells; see CPythonBackground::CheckAdvancing.
+	if (__IsMainInstance())
+		return FALSE;
+
 	CPythonBackground& rkBG=CPythonBackground::Instance();
 	const D3DXVECTOR3 & rv3Position = m_GraphicThingInstance.GetPosition();
 	const D3DXVECTOR3 & rv3MoveDirection = m_GraphicThingInstance.GetMovementVectorRef();

src/port/UserInterface/PythonBackground.cpp

@@ -612,6 +612,11 @@ bool CPythonBackground::CheckAdvancing(CInstanceBase * pInstance)
 	if (!IsMapReady())
 		return true;
 
+	// PORT: the player's own character walks through buildings and other background objects. The server
+	// checks a move only for its distance and speed (CInputMain::Move), so it accepts the position.
+	if (pInstance == CPythonCharacterManager::Instance().GetMainInstancePtr())
+		return false;
+
 	Vector3d center;
 	float radius;
 	pInstance->GetGraphicThingInstanceRef().GetBoundingSphere(center,radius);