[MITgcm-support] obcs in CPP_OPTIONS.h?, more questions

[Renske Gelderloos]

Hi Patrick,

Thanks for the help, this indeed works a lot better :-). I have another 
question about the open boundary conditions. I'm sure it's a very 
trivial thing, but I can't find a quick way. The problem is the 
following: in data.obcs you can specify the gridpoints where you want an 
open boundary condition. I would like, for example, an OB on the first 
21 gridpoints (out of 125) at the southern edge of the domain. I would 
expect that I should type something like OB_Jsouth(1:21)=1 or maybe 
OB_Jsouth(1:21)=20*1, but this doesn't work. The only way I get this 
working is by individually typing OB_Jsouth(1)=1, OB_Jsouth(2)=1, etc. 
I'm sure there must be a quicker way. Can anyone tell me?

Renske


Patrick Heimbach wrote:
>
> HI there,
>
> since "obcs" is a package, it is enabled in
> code/packages.conf
> rather than in
> code/CPP_OPTIONS.h
> (see e.g. manual, section 6.1.1 Package Inclusion/Exclusion)
> http://mitgcm.org/r2_manual/latest/online_documents/node226.html
>
> In order to avoid confusion,
> this practice is "enforced" by having genmake2 stop if it finds
> such a #define in a CPP file.
>
> You can verify this by checking the contents of
> verification/plume_on_slope/code/
> (which, by the way, in newer versions of the code has changed into
> verification/tutorial_plume_on_slope/
> and is documented in section 3.16.3
> http://mitgcm.org/r2_manual/latest/online_documents/node152.html
> and as I am typing and double-checking this, I see
> that the manual has the wrong instructions, since it wrongly says
> "Open boundaries are enabled with #define ALLOW_OBCS in 
> code/CPP_OPTIONS.h").
> Our apologies...
>
> -Patrick
>
>
>
> On May 27, 2008, at 10:10 AM, Renske Gelderloos wrote:
>
>> Hi,
>>
>> I've got a question about open boundary conditions. In the tutorial 
>> (3.14.3) it says that you should add
>>
>> #define ALLOW_OBCS
>>
>> in code/CPP_OPTIONS.h. However, if I do so I cannot compile anymore 
>> and get the following error (in genmake2):
>>
>> Searching for *OPTIONS.h files  in order to warn about the presence 
>> of "#define "-type statements that are no longer allowed:
>> found CPP_OPTIONS="../code//CPP_OPTIONS.h"
>> Error: In ../code//CPP_OPTIONS.h there is an illegal line: #define 
>> ALLOW_OBCS
>>
>> Furthermore, in the CPP_OPTIONS.h in verification/plume_on_slope/code 
>> I cannot find this switch. Has it changed in any way? Or am I missing 
>> something else? Thanks for any advice!
>>
>> Renske
>>
>>
>>
>> _______________________________________________
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>
> ---
> Patrick Heimbach | heimbach at mit.edu | http://www.mit.edu/~heimbach
> MIT | EAPS 54-1518 | 77 Massachusetts Ave | Cambridge MA 02139 USA
> FON +1-617-253-5259 | FAX +1-617-253-4464 | SKYPE patrick.heimbach
>
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