Sort nodes and elements: Sort and renumber nodes and
elements by positions
Nodes and
elements can be sorted depending on their geometrical position. The elements or
nodes will at first be renumbered according to their coordinates and afterwards
sorted by these numbers.
Renumbering
follows these rules:
The smallest box containing all nodes is
calculated.
This box is subdivided into 1024 segments for
each direction, i.e. the structure is subdivided into 230 small
boxes. When choosing the sequence of sorting, it may be specified that this
subdivision is ignored for one direction.
The boxes are sequentially numbered, for
example by choosing xyz, the sequence of numbering is (((ix = 1, 1024), iy = 1,
1024), iz = 1, 1024) with ix,iy,iz the number of the section in the direction
of coordinate axis.
Nodes are distributed into the corresponding
boxes and sequentially numbered.
In case a local coordinate system is given, all
nodes are transformed into this system and sorted according to their position
within this system.
When sorting elements the center of gravity is
used as position of elements.
Note: If the
node or element IDs of a finite element structure is changed, it is checked
whether a file with load data exists and it is asked whether the IDs used in
this file should be adjusted. In case of a positive answer the load data is
loaded and the external node IDs respectively element IDs are changed, after
that the file is saved to hard disk. In case of a negative answer, it is asked
whether the renumbering should be executed anyway. Answer NO has to be given
when the file has to be updated before with data in the memory. If IDs are
changed in the load file, it is imported to also save the element structure. If
IDs of a macro structure are changed, it is checked whether a file with
subdivision data exists and asked to adjust the IDs.
Following dialog
shows the available options:
Sort by
coordinates
Nodes:
Sort nodes
Elements:
Sort elements
Order:
Select order of axis, which the sorting scheme should follow. Alternatives are
(xy), (yx), (xz), (zx), (yz), (zy), (xyz), (xzy), (yxz), (yzx), (zxy), (zyx).
In case of giving only 2 axes there will be no sorting for the third direction.
For example sorting scheme (xy) will be used for 3D-surfaces, which shouldn’t
be sorted in the z direction.
CoordSys:
In case an ID of a local coordinate system is given, sorting is done within
this system. The list box shows all defined coordinate systems.
Sort by
Group ID:
Elements will be sorted in ascending order of their group Ids.
Mech.Type ID: Elements will be sorted in ascending order of their mechanical type
ID.
Element ID:
Elements will be sorted in ascending order of their ID.
Element
selection
Only
elements and pertinent nodes that are in the element selection will be
considered.
Numbering:
ID1:
Number for first element/node.
Inc:
Increment for numbering.