## 7.7. Subroutine EXFOR3

The subroutine EXFOR3 may be used to apply an external force on structured or unstructured nodes.

The direction of the force can be manipulated by modification of the variables COSX_USER,COSY_USER, COSZ_USER (module: bnddef (mdcom.f90)). The calling routines check if they are modified (they are set to BIG before entering); if so we use them (they all have to be modified). If not modified, the direction defined on input in the graphical user interface will be used.

Please refer to the current and latest listing of the code in the routine usrsub33.f90.

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