Method GetCeilingNormal

TombEngine/Game/collision/Point.cpp:131–147

	}

	Vector3 PointCollisionData::GetCeilingNormal()
	{
		if (_ceilingNormal.has_value())
			return *_ceilingNormal;

		// Set ceiling normal.
		if (GetCeilingBridgeItemNumber() != NO_VALUE)
		{
			_ceilingNormal = GetBridgeNormal(false);
		}
		else
		{
			_ceilingNormal = GetTopSector().GetSurfaceNormal(_position.x, _position.z, false);
		}

		return *_ceilingNormal;
	}

	int PointCollisionData::GetFloorBridgeItemNumber()
	{