/// <summary>
/// 隣同士の部屋をつなぐためのポータル（出入口）のペアを生成
/// </summary>
void GenerateRoomPortals(
DungeonRoom startRoom, DungeonRoom endRoom,
bool isHorizontal,
out DungeonPortal startPortal, out DungeonPortal endPortal)
{
startPortal = new DungeonPortal(
startRoom.GetRandomPortalPoint(isHorizontal ? DungeonRoom.Side.Right : DungeonRoom.Side.Bottom));
startPortal.ConnectedRoom = startRoom;
startRoom.Portals.Add(startPortal);
endPortal = new DungeonPortal(
endRoom.GetRandomPortalPoint(isHorizontal ? DungeonRoom.Side.Left : DungeonRoom.Side.Top));
endPortal.ConnectedRoom = endRoom;
endRoom.Portals.Add(endPortal);
}
