Method GetWaterTopHeight

TombEngine/Game/collision/Point.cpp:302–398

	}

	int PointCollisionData::GetWaterTopHeight()
	{
		if (_waterTopHeight.has_value())
			return *_waterTopHeight;

		FloorInfo* sector = nullptr;
		auto* room = &g_Level.Rooms[_roomNumber];
		int roomNumber = _roomNumber;

		int adjoiningRoomNumber = NO_VALUE;
		do
		{
			int x = (_position.x - room->Position.x) / BLOCK(1);
			int z = (_position.z - room->Position.z) / BLOCK(1);

			if (z <= 0)
			{
				z = 0;
				if (x < 1)
				{
					x = 1;
				}
				else if (x > (room->XSize - 2))
				{
					x = room->XSize - 2;
				}
			}
			else if (z >= (room->ZSize - 1))
			{
				z = room->ZSize - 1;
				if (x < 1)
				{
					x = 1;
				}
				else if (x > (room->XSize - 2))
				{
					x = room->XSize - 2;
				}
			}
			else if (x < 0)
			{
				x = 0;
			}
			else if (x >= room->XSize)
			{
				x = room->XSize - 1;
			}

			sector = &room->Sectors[z + (x * room->ZSize)];
			adjoiningRoomNumber = sector->SidePortalRoomNumber;

			if (adjoiningRoomNumber != NO_VALUE)
			{
				roomNumber = adjoiningRoomNumber;
				room = &g_Level.Rooms[adjoiningRoomNumber];
			}
		}
		while (adjoiningRoomNumber != NO_VALUE);