[Nek5000-users] Reading binary data

[nek5000-users at lists.mcs.anl.gov]

Hi Mike,

vector fields (e.g. mesh coordinates) are stored in the following way:

LOOP over all elements
	LOOP i = {x,y,z}
		 i for all GLL points (internal element points)
	ENDLOOP
ENDLOOP

2D example with (E=2,N=2):
x1_1 x2_1 x3_1 y1_1 y2_1 y3_1 x1_1 x2_2 x3_2 y1_2 y2_2 y3_2

where x2_1 means the x-coordinate of the 2nd GLL point of element 1.

hth,
Stefan 

On Aug 11, 2010, at 11:34 PM, <nek5000-users at lists.mcs.anl.gov> wrote:

> 
> Hello All.  I found this helpful message from Stefan regarding the structure of a binary field file.   Could someone please tell me what the structure is when the geometry info is also contained?
> 
> Thanks!
> --Mike
> 
> nek5000-users at lists.mcs.anl.gov nek5000-users at lists.mcs.anl.gov 
>> Thu May 6 07:18:03 CDT 2010
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>> Hi Fred,
>> 
>> header: 132 bytes
>> endian test tag: 4 bytes
>> element mapping: nel* 4 bytes
>> data: nfields*nxyz*nel* wdsizo (where wdsizo is 4 or 8 bytes)
>> metadata (min/max values): nfields*2*nel * 4 bytes
>> 
>> Stefan
>> 
> 
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