Method GetWaterSurfaceHeight

TombEngine/Game/collision/Point.cpp:175–199

	}

	int PointCollisionData::GetWaterSurfaceHeight()
	{
		if (_waterSurfaceHeight.has_value())
			return *_waterSurfaceHeight;

		auto* room = &g_Level.Rooms[_roomNumber];
		const auto* sector = Room::GetSector(room, _position.x - room->Position.x, _position.z - room->Position.z);

		// Set water surface height.
		bool isBelow = !TestEnvironment(ENV_FLAG_WATER, room);
		while (sector->GetNextRoomNumber(_position, isBelow).has_value())
		{
			room = &g_Level.Rooms[sector->GetNextRoomNumber(_position, isBelow).value_or(sector->RoomNumber)];
			if (isBelow == TestEnvironment(ENV_FLAG_WATER, room))
			{
				_waterSurfaceHeight = sector->GetSurfaceHeight(_position.x, _position.z, isBelow);
				return *_waterSurfaceHeight;
			}

			sector = Room::GetSector(room, _position.x - room->Position.x, _position.z - room->Position.z);
		}

		_waterSurfaceHeight = NO_HEIGHT;
		return *_waterSurfaceHeight;
	}

	int PointCollisionData::GetWaterBottomHeight()
	{