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documentation/lagrit_manual/commands/setsize.txt

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+.. _setsize :
+
+> **_SETSIZE_**
+
+> > **setsize** will set the mesh object attributes
+xmin,xmax,ymin,ymax,zmin,zmax from the xic,yic,zic values of all 'real' points
+(dudded and merged points will be ignored).&nbsp_place_holder; It also sets
+epsilon, epsilona and epsilonv as follows:&nbsp_place_holder; setsize is
+called internally by LaGriT commands that add nodes to the
+mesh;**[copypts](COPYPTS.html)**,**[ createpts](createpts.html)**,
+**[regpnts](REGNPTS.html)**, **[recon](RECON.html)**,**[scale](SCALE.html)**,
+**[translate](TRANS.html)**
+
+epsilonv=abs(xmax-xmin)*abs(ymax-ymin)*abs(zmax-zmin)*epsilonr*1000.
+
+epsilona=((xmax-xmin)**2+(ymax-ymin)**2+(zmax-zmin)**2)*epsilonr*1000.
+
+epsilonr is set at initialization time by:
+
+>>
+
+>>> > > x2=one
+
+do i=1,1000
+
+>>>>>
+
+>>>>>> x2=x2/two
+
+x1=one+x2
+
+if(x1.le.one) go to 11
+
+>>>>>
+
+>>>>> enddo
+
+11 epsilonr=x2*2.
+
+where the values of 'one' and 'two' are obtained from the include file
+'consts.h'.
+
+The command**[ cmo/printatt ](cmo/cmo_printatt.html)**can be used to view any
+of these cmo attributes:
+
+e.g. **cmo/printatt**//**xmax**
+
+The programmer interface is the subroutine setsize (see Section e.7)
+
+The variables epsilonl, epsilona and epsilonv are mesh object attributes;
+hence they may be different for all meshes in a given run.&nbsp_place_holder;
+epsilona, epsilonv and epsilon1 may be set by the user with the
+**[cmo/setatt](cmo/cmo_setatt.html)** command.&nbsp_place_holder; They also
+will be written to LaGriT dumps and subsequently will be read in at restart.
+The variables in consts.h (epsilon and epsilonr) are machine and run
+dependent. They are not written to LaGriT dumps and there is only one copy per
+run.
+
+&nbsp_place_holder; FORMAT: **setsize**
+
+if epsilonv is very small epislonvis set to epsilona
+
+epsilon1 is set by a call to set_epsilon
+
+epsilon1 is set to the square root of epsilona unless this number would be too
+small in which case epsilon1 is to (( xmax-xmin) + (ymax-ymin) + (zmax-zmin))
+* 1.e=8/3
+
+Many LaGriT algorithms use epsilon1; for example, if a node falls on a
+interface or boundary surface.&nbsp_place_holder; It uses epsilonv to
+determine if a node can be connected.&nbsp_place_holder; Errors from
+**setpts** and **connect** may result if inconsistant or wrong values of
+epsilons are used.
+
+&nbsp_place_holder;
+
+&nbsp_place_holder;
+