檢視 $PBCpoint x 的原始碼

Format:

 $PBCpoint x
 xleft  xrigth

Example:


 $PBCpoint x
 0 3e-06  


xleft is the left x point for periodic boundary condition.
xright is the right x point.
xleft and xright usually correspond to the mesh boundary.

the mesh should be compile with PBC file, if you need to use PBC.