Renumbering backend nodes & elements

There are a number of different ways to renumber nodes and elements in cmiss.

• ** In the backend I know of 2 options which are:**

  • 1. Use the CMISS utilities module 'RenumIp':

    <pre>

use CmUtils::RenumIp; renumIp("fitted_arm_6.ipnode",30,"fitted_arm_6.ipelem",30);

</pre>

POTENTIAL PROBLEM - if your mesh has versions, the nodes pertaining to your version numbers in your ipelem file will not be offset correctly

• 2. This option uses a function within cmiss:

  <pre>

fem renumber mesh node_offset 10 element_offset 10 region 1;

</pre>

POTENTIAL PROBLEM - if your mesh has versions, the nodes pertaining to your version numbers in your ipelem file will be incorrectly set to zero

• ** In the frontend:**

  • To ensure version numbers are offset correctly in the ipelem file, you can renumber the nodes and elements in CMGUI (the frontend) using the gfx change_identifier command, then export them to backend files using the command:

    <pre>

gfx export cm region name field coordinates ipcoor name.ipcoor ipbase name.ipbase ipnode name.ipnode ipelem name.ipelem;

</pre>

• This command is very useful! It will output your exnode and exelem into ipnode and ipelem files, at the same time it will output a coordinate and basis file. Note however that you cannot output only node and element files, you need to output coordinate & basis files for the command to work.