[MOAB-dev] mbchaco default arguments

[Tim Tautges]

I don't think we've used mbchaco for some time, it should probably get removed (ticket added).  Try mbzoltan, I've run 
that recently and it works.

- tim

Roman Putanowicz wrote:
> Hi,
> 
> I have tried to use mbchaco (more exactly ComputePartition class).
> 
> The method 
> MBErrorCode compute_partition(const int nprocs, const char *filename = NULL, 
>                               const bool write_file = false, const char
>                               *out_file = NULL);
> 
> when used with default parameters fails immediately because of the
> check in the code:
> 
> // check input
> if (NULL == filename && NULL == out_file) return MB_FAILURE;
> 
> It seems that this method is written having in mind only the input from
> file. It is easy to fix it however I got puzzling output from chaco
> when trying to use mbchaco standalne:
> 
> putanowr at tomi:~/work/MOABUtils/tests$ mbchaco data/lshape.vtk y ala 4
>                     Chaco 2.0
>                       (MOAB-based version)
>           Sandia National Laboratories
> Parameter file `User_Params' not found; using default parameters.
> Parameter file `User_Params' not found; using default parameters.
> No graph input.  Only allowed for inertial or simple methods without KL.
> goal[0] is -0.25, but should be nonnegative.
> goal[1] is -0.25, but should be nonnegative.
> goal[2] is -0.25, but should be nonnegative.
> goal[3] is -0.25, but should be nonnegative.
> Sum of values in goal (-1) not equal to sum of vertex weights (-1).
> ERROR IN INPUT.
> 
> Could someone please comment what is going on?
> If I need need a special User_Params setting for mbchaco
> could somebody provide a sample one? (ComputePartition class
> takes arbitrary decision to make the global_method=1,
> but even if I change the code and take for instance global_method=4
> then there is this business of "Sum of values in goal (-1) not equal to sum of
> vertex weights (-1)."
> 
> The sample mesh file I tried to partition is in attachment.
> 
> Regards,
> 
> Roman

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              Tim Tautges            Argonne National Laboratory
          (tautges at mcs.anl.gov)      (telecommuting from UW-Madison)
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