enum CompareMode { Undefined = -1, NotEqual = 0, Less = 1, LessOrEqual = 2, Equal = 3, GreaterOrEqual = 4, Greater = 5, Parallel = 6, AntiParallel = 7, ParallelOrAnti = 8, SameHemisphere = 10, OppositeHemisphere = 11, AtLeastOne = 12, All = 13, AzimuthSameQuadrant = 14, AzimuthOppositeQuadrant = 15 };