Re: [gts-general] memory issue while remeshing

[Márcio R. P. <pi...@gm...>]

Luis, what is the configuration of your system?



On 16 March 2011 12:33, Luis Saavedra <lui...@gm...> wrote:

> 2011/3/15 Márcio Ricardo Pivello <pi...@gm...>
>
>> Hi all
>>
>> I've had some memory issues with GTS about remeshing so I decided to run a
>> very simple test, which is reproduced bellow. The test is simple:
>>
>> 1. create a sphere using gts_surface_generate_sphere
>> 2. n_edges = gts_surface_edge_number(s)
>>    n_edges_coarsen = 0.7*n_edges
>>    n_edges_refine = n_edges
>> 3. Enter a loop:
>> 3.1 apply gts_surface_coarsen using Lindstrom & Turk's algorithm and edge
>> number as the stop criteria. stopdata = n_edges_coarsen
>> 3.2 apply gts_surface_refine with default functions and stop_number as the
>> stop critera. stop_data = n_edges_refine. The idea is to return the mesh to
>> its original vertex_number, edge_number and face_number
>>
>> If I run this loop long enough I'll eventually run out of memory (8 GB
>> RAM).
>>
>> How can I solve this problem?
>>
>> Could it be a bug in the *object_destroy functions?
>>
>> ------------------------------------
>> code
>> ------------------------------------
>>
>>
>> #include "lagrangian.h"
>> static gboolean stop_number (gdouble cost, guint number, guint * max)
>> {
>>    if (number > *max)
>>       return TRUE;
>>    return FALSE;
>> }
>>
>> int main(int argc, char** argv)
>> {
>>
>>    GtsVolumeOptimizedParams params;
>>    params.volume_weight = 0.5;
>>    params.boundary_weight = 0.5;
>>    params.shape_weight = 1.0e+2;
>>    GtsSurface *s = gts_surface_new(gts_surface_class(), gts_face_class(),
>> gts_edge_class(), gts_vertex_class());
>>    s=gts_surface_generate_sphere(s,7);
>>    int n_edges_coarsen = 0.7*gts_surface_edge_number(s);
>>    int n_edges_refine = gts_surface_edge_number(s);
>>    int n=0, i=0;
>>    double min_angle = 5.0*DEGREES_TO_RADIANS;
>>    for(i=0;i<1000;++i)
>>    {
>>
>> gts_surface_coarsen(s,(GtsKeyFunc)gts_volume_optimized_cost,&params,(GtsCoarsenFunc)gts_volume_optimized_vertex,&params,(GtsStopFunc)gts_coarsen_stop_number,
>> &n_edges_coarsen, min_angle);
>>       gts_surface_refine(s,NULL,NULL,NULL,NULL,stop_number,
>> &n_edges_refine);
>>    }
>>
>>
>>    return 0;
>> }
>>
>>
>> Thanks for helping
>>
>>
>>
>> Márcio
>>
>> --
>> Márcio Ricardo Pivello
>> Universidade Federal de Uberlândia
>> Faculdade de Engenharia Mecânica
>> Laboratório de Mecânica dos Fluidos
>> +55 (34) 3239 4040 ramal 618
>>
>>
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>>
> Hi Márcio,
>
> I compiled and run the example (attached) and I have no problems you
> mentioned, for this reason, I would like you to tell us what operating
> system you use and what is you version of GTS in order to suggest some possible
> solutions.
>
> regards,
> Luis.
>
>
> ------------------------------------------------------------------------------
> Colocation vs. Managed Hosting
> A question and answer guide to determining the best fit
> for your organization - today and in the future.
> http://p.sf.net/sfu/internap-sfd2d
> _______________________________________________
> Gts-general mailing list
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> https://lists.sourceforge.net/lists/listinfo/gts-general
>
>


-- 
Márcio Ricardo Pivello
Universidade Federal de Uberlândia
Faculdade de Engenharia Mecânica
Laboratório de Mecânica dos Fluidos
+55 (34) 3239 4040 ramal 618