====== Node Sorting Operators  ======

A set of MeshPoints must sometimes be sorted, usually to reduce a selection. ''SortingOperators'' are objects that can be used to execute this sorting operation.

|''SortByX0()''| Sort by X0 in increasing order |
|''SortByY0()''| Sort by Y0 in increasing order |
|''SortByZ0()''| Sort by Z0 in increasing order |
|''SortByDX0()''| Sort by X0 in decreasing order |
|''SortByDY0()''| Sort by Y0 in decreasing order |
|''SortByDZ0()''| Sort by Z0 in decreasing order |
|''SortByPos0(lock)''| Sort in increasing order by an initial coordinate in a given direction (lock = TX, TY or TZ) |
|''SortByKsi0(curve)''| Project nodes on the curve then sort in increasing order by projected curve abscissa |
|''SortByDist0(x,y,z)''| Sort nodes by increasing distance from the point of coordinates (x,y,z) |
|''SortByNo()''| Sort nodes by increasing user number |
|''InverseSOp(sOp)''| Inverse the effect of the sorting operator to which it is applied |
|''CombineSOp(sOp1, Sop2)''| Combine 2 sortings Operators (applying SOp1 then SOp2) |

=== Use: ====
  * Extracting curves ([[doc:user:results:courbes_res|''valuesManager'']])
  * Sorting groups ([[doc:user:geometry:user:selections|''Group'']])