[GRASS-dev] [bug #4725] (grass) nviz crashed while volume visualisation

[Markus Neteler]

On Wed, Aug 02, 2006 at 09:54:06PM +0200, Markus Neteler via RT wrote:
> Hi,
> 
> [ http://intevation.de/rt/webrt?serial_num=4725 ]
> 
> I just tested the volume with the Slovakia3D dataset:
> it works again. Whatever happened, but NVIZ volume
> visualization seems to be back.
> 
> GRASS 6.1.cvs (slovakia3d):~ >  nviz dem500 volume=precip3d.500z50
> Loading Data
> Update elev null mask
> Loading Data
> translating colors from fp
> recalculating normals...
> % [Raster MASK present]
> GRASS 6.1.cvs (slovakia3d):~ >
> 
> Someone please test this with 6.1.0RC1. Enter Panel -> volume
> -> add -> constant -> 1000 to visualize an isosurface. Or
> read the README of the dataset.
> 

Ok, it crashed in a second run.

I debugged a problem in togl_flythrough.c, line 800:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1239013664 (LWP 24023)]
0xb734e327 in __strtouq_internal () from /lib/tls/libc.so.6
(gdb) bt full
#0  0xb734e327 in __strtouq_internal () from /lib/tls/libc.so.6
No symbol table info available.
#1  0xb734e0cf in __strtol_internal () from /lib/tls/libc.so.6
No symbol table info available.
#2  0xb7a2f2d0 in atoi (__nptr=0x0) at /usr/include/stdlib.h:333
No locals.
#3  0x08068d93 in Ndraw_all_together_cmd (data=0x8073f40, interp=0x8079b18, argc=1, argv=0xbf8a89ec)
    at togl_flythrough.c:800
        buf_surf = 0x0
        buf_vect = 0x0
        buf_site = 0x0
        buf_vol = 0x0
        buf_north_arrow = 0x0
        arrow_x = 0x0
        buf_label = 0x0
        buf_legend = 0x0
        buf_fringe = 0x0
        buf_is_drawing = 0x0
#4  0xb76e3c86 in TclInvokeStringCommand () from /usr/lib/libtcl8.4.so
No symbol table info available.
#5  0x08073f40 in script_mode ()
No symbol table info available.
#6  0x08079b18 in ?? ()
No symbol table info available.


Since all the buf_xxx stuff is 0x0, atoi() crashes.
Not sure if this is related to the recent togl changes.

Markus