EdgeFlag

enum EdgeFlag : byte
{
    None = 0,
    BlockDst2Src = 1,
    BlockSrc2Dst = 2,
    Blocked = BlockDst2Src | BlockSrc2Dst,
    Internal = 4,
    Global = 8,
    Underpass = 16, // actor passthrough from outside & blocked from inside
    Entrance = 32,  // Dungeon (obsolete?)
    Bit6 = 64,
    Siege = 128,    // Fortress War (attack passthrough)
}