Like GetIntersection(), but works directly with vectors of S2CellIds, Equivalent to:
*out = S2CellUnion(x).Intersection(S2CellUnion(y)).Release()
except that this method has slightly more relaxed normalization requirements: the input vectors may contain groups of 4 child cells that all have the same parent. (In a normalized S2CellUnion, such groups are always replaced by the parent cell.)
See Implementation
Like GetIntersection(), but works directly with vectors of S2CellIds, Equivalent to:
*out = S2CellUnion(x).Intersection(S2CellUnion(y)).Release()
except that this method has slightly more relaxed normalization requirements: the input vectors may contain groups of 4 child cells that all have the same parent. (In a normalized S2CellUnion, such groups are always replaced by the parent cell.)