Add UGrid point and cell removal functions
This release adds three new functions which generate a new XmUGrid by removing points and/or cells from an existing one.
- XmRemovePointsAndCells : A low-level function that removes all the points and cells given to it. Requires that any cells adjacent to deleted points also be listed for removal.
- XmRemovePoints : Removes all the points given to it. Unlike XmRemovePointsAndCells, this will automatically remove any cells adjacent to the removed points. An optional overload provides a set of cell IDs removed.
- XmRemoveCells : Removes all the cells given to it. Can optionally delete any points that are orphaned as a result of deleting cells, and can also optionally provide a set of point IDs removed.