On Jul 14, 2009, at 2:07 PM, 曹 修豪 wrote:
When I increase the resolution of same structure (a gaussian source
for example) , the color of field pattern will get lighter
(Using h5topng command) , is that normal?
Yes. I'm guessing you have a point source (or a line source in 3d, or
similar variations). The field from a point source is singular -- it
blows up as you approach the source. At any finite resolution, this
singularity is truncated to a finite value by the discretization, but
the peak field (at the source location) increases as you increase the
resolution.
If you use the default color scale (no -m or -M options) in h5topng,
this increasing peak field will make everything else lighter.
Howerver , I use the -m and -M options of h5topng command to
redifine color scale ,
for example , using -v option can get an "all data range = -18.xxxx
~ +18.xxxx" for resolution 200 and "-1.8xxx ~ +1.8xxxx" for
resolution 20 from terminal , is this solution correct?
Yes. You are seeing precisely the increase of the peak field at the
source location with resolution that is expected for a point source.
Steven
_______________________________________________
meep-discuss mailing list
[email protected]
http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
