Re: [gts-general] memory issue while remeshing

[Luis S. <lui...@gm...>]

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.