enum OsnapMode { kOsModeEnd = 1, kOsModeMid = 2, kOsModeCen = 3, kOsModeNode = 4, kOsModeQuad = 5, kOsModeIntersec = 6, kOsModeIns = 7, kOsModePerp = 8, kOsModeTan = 9, kOsModeNear = 10, kOsModeApint = 11, kOsModePar = 12, kOsModeStart = 13 };