Re: [igraph] [Fwd: Linking error underwindows]

[Tamas Nepusz]

Hi Gang,

This is the error message I see on the standard output:

Error: Exceeded density grid with x_grid = 490 and y_grid=2147483638.
Program stopped.

This is coming from the original DrL implementation that is embedded
inside igraph. This should not stop the program, though, so there is
definitely a bug on our side (the DrL implementation should have  been
modified so it uses igraph's error reporting mechanism).

Anyway, your code seems to work if I replace IGRAPH_LAYOUT_DRL_COARSEN
with IGRAPH_LAYOUT_DRL_DEFAULT.

-- 
Tamas

On Fri, Nov 06, 2009 at 11:50:17AM -0500, Gang Su wrote:
> Hi Tamas,
>
> it passed igraph_layout_drl_optoins_init
> And i don't see any error messages, the problem just aborted itself.
> I was buidling under windows using visual studio.
> All the other layout algroithms showed no problem.
> Here's a simple test, which failed as well:
> Could you please have a try? Thanks!
>
> /*test whether igraph is correctly linked*/
>
> #include <stdio.h>
> #include "igraph.h"
> #include <iostream>
>
> //link successful. It's actually working.
>
>
> int main(int argc, char* argv[])
> {
>   //igraph_t g;
>   //FILE *outfile;
>
>   //igraph_barabasi_game(&g, 1000, /*m=*/2, /*outseq=*/0, /*outpref=*/0, 
> /*directed=*/1);
>   //igraph_simplify(&g, /*multiple=*/1, /*loops=*/0);
>   //outfile=fopen("out.txt", "w");
>   //igraph_write_graph_edgelist(&g, outfile);
>   //fclose(outfile);
>   //igraph_destroy(&g);
>     int edgeArray[] = 
> {0,2,6,17,7,19,18,19,3,21,9,21,12,22,5,24,3,25,6,25,16,25,20,29,21,29,28,31,10,32,8,33,19,33,6,34,11,34,9,42,37,44,18,45,35,45,46,47,7,48,32,48};
>
>   igraph_t g;
>   igraph_vector_t v;
>   igraph_vector_init(&v, 52);
>   for(int i=0; i<52; i++){
>       VECTOR(v)[i] = edgeArray[i];
>   }
>   igraph_create(&g, &v, 0, 0);
>
>   printf("this is working");
>     long int vcount = igraph_vcount(&g);
>   igraph_matrix_t locs;
>   igraph_matrix_init(&locs, vcount, 2);
>
>     igraph_layout_drl_options_t options;
>   igraph_layout_drl_options_init(&options, IGRAPH_LAYOUT_DRL_COARSEN);
>
>   //Force directed DRL, which failed
>   igraph_layout_drl(&g, &locs, 0, &options, 0, 0);
>
>
>
>   return 0;
> }
>
>
> Gang
>
>
>
>
> Tamas Nepusz wrote:
>> Hi Gang,
>>
>>   
>>> According to that thread, I changed mode from "Debug" to "Release", and 
>>> solved the problem. I can build the application now, however, when I run 
>>> it under windows, it halted and quited by itself.
>>>     
>> Do you see any error message when it quits? Does the execution get past
>> the igraph_layout_drl_options_init call?
>>
>>   
>
>
>
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