of.group.element#
- of.group.element *group_tag* <string> *method* <string> *region* <double, double, …> …
- Parameters:
- group_tag: tag of the group. - method: - -box.in/box.on/box.out - -circle.in/circle.on/circle.out - -plane.on/plane.above/plane.below - region: - The region for box can be set as - x [xmin xmax] y [ymin ymax] or 
- [xmin xmax ymin ymax] 
 - The region for circle can be set as - center [x,y] radius or 
- [x,y,radius] 
 - The region for plane can be set as - p1 [x0,y0] p2 [x1,y1] or 
- [x0,y0,x1,y1] 
 
 - Note - rule 1: it is illegal to use the same tags for one type of entity. 
- rule 2: the node group also be inherited from your input mesh file. 
- rule 3: the node groups can be done before the mesh processing. The group information will be transferred to the new inserted nodes automatically. 
 
Example:#
of.group.element [rock] range box.in x [0,1] y [0,1]