Trying visualise 3d volumes in nviz I recognized strange and unpredictable
behavior - time to time the nviz windows is just finishing without any
warning or error message. Working with raster files or vectors is fine.
Regards
Tomas
Tomas Lanczos wrote:
Trying visualise 3d volumes in nviz I recognized strange and
unpredictable behavior - time to time the nviz windows is just
finishing without any warning or error message. Working with raster
files or vectors is fine.
3D raster volumes are a little buggy, see:
http://thread.gmane.org/gmane.comp.gis.grass.devel/16786/focus=16886
http://intevation.de/rt/webrt?serial_num=4725
Neither Bob's nor Soeren*'s patches have been applied in CVS yet.
[*] geovol_file *vf = NULL
can you try applying them and see if it fixes your problem?
does it work for you in 6.2.0?
launched with:
GRASS> nviz -q
?
do you see anything about a segmentation fault on the terminal after it
breaks?
Hamish
Thanks Hamish,
3D raster volumes are a little buggy, see:
http://thread.gmane.org/gmane.comp.gis.grass.devel/16786/focus=16886
http://intevation.de/rt/webrt?serial_num=4725
Well, I see ...
Neither Bob's nor Soeren*'s patches have been applied in CVS yet.
[*] geovol_file *vf = NULL
can you try applying them and see if it fixes your problem?
Where can I find more info about the patches? I am only a geologist, but can
learn quickly :-))).
does it work for you in 6.2.0?
I don't use the 6.2.0 know, removed it a month ago
launched with:
GRASS> nviz -q
?
Yes. I played with it to reproduce the error. So, the error happens when I
do the the following: select Visualize - > Volume - > select file, then
select visualization type -> isosurface -> choose attribute -> do anything
else -> segmentation fault. Doing slices is working fine.
But what is really strange but maybe helps (or just coincidence) is that
when I tried to do something similar in Paraview I got the same error.
do you see anything about a segmentation fault on the
terminal after it breaks?
No, except the "segmentation fault" nothing else.
Regards
Tomas
Hamish
Tomas Lanczos wrote:
Thanks Hamish,
>
> 3D raster volumes are a little buggy, see:
> http://thread.gmane.org/gmane.comp.gis.grass.devel/16786/focus=16886
> http://intevation.de/rt/webrt?serial_num=4725Well, I see ...
> Neither Bob's nor Soeren*'s patches have been applied in CVS yet.
> [*] geovol_file *vf = NULL
> can you try applying them and see if it fixes your problem?Where can I find more info about the patches? I am only a geologist,
but can learn quickly :-))).
Bob's was in the first message in the above linked thread:
for visualization/nviz/src/map_obj.c
--- map_obj.c 2006-11-16 12:22:16.000000000 -0400
+++ map_obj.c_bak 2006-11-16 12:21:56.000000000 -0400
<at> <at> -437,6 +437,7 <at> <at>
char const_string = "constant";
char zero_string = "0";
int new_id;
+ int mode;
int *surf_list, num_surfs, i;
Nv_clientData *new_data;
int file_used = 0;
<at> <at> -560,6 +561,7 <at> <at>
return (TCL_ERROR);
}
new_id = GVL_new_vol();
+ mode = 0;
/* See if there is a default file name specified */
if ((argc >= 3) && (strncmp(argv[2], "name=", 5))) {
<at> <at> -570,6 +572,9 <at> <at>
return (TCL_ERROR);
}
file_used = 1;
+ mode |= DM_GOURAUD;
+ GVL_isosurf_set_drawmode(new_id, mode);
+ GVL_slice_set_drawmode(new_id, mode);
}
sprintf(id, "Nvol%d", new_id);
Soeren's:
for lib/ogsf/gvl_calc.c
Index: gvl_calc.c
RCS file: /home/grass/grassrepository/grass6/lib/ogsf/gvl_calc.c,v
retrieving revision 1.3
diff -u -r1.3 gvl_calc.c
--- gvl_calc.c 9 Feb 2006 03:08:57 -0000 1.3
+++ gvl_calc.c 9 Jul 2006 13:48:54 -0000
@@ -444,7 +444,7 @@
{
int x, y, z;
int i, a, read;
- geovol_file *vf;
+ geovol_file *vf = NULL;
geovol_isosurf *isosurf;
data_buffer *dbuff;
I played with it to reproduce the error. So, the error happens
when I do the the following: select Visualize - > Volume - > select
file, then select visualization type -> isosurface -> choose attribute
-> do anything else -> segmentation fault. Doing slices is working
fine.But what is really strange but maybe helps (or just coincidence) is
that when I tried to do something similar in Paraview I got the same
error.> do you see anything about a segmentation fault on the
> terminal after it breaks?No, except the "segmentation fault" nothing else.
try with Bob's patch.
Hamish