[Radiance-general] iges conversion

[Erwin Zierler]

Hi Chris,

while I dont know anything about this particular program I am rather sure
that this file librt.so.19 is not in your library path.
On my system I issue the following commands to find out more:

# locate librt.so
/lib/librt.so.1
/usr/lib/librt.so

# ls -l /lib/librt.so.1 /usr/lib/librt.so
lrwxrwxrwx 1 root root 14  5. Mai 03:40 /lib/librt.so.1 -> librt-2.3.6.so
lrwxrwxrwx 1 root root 20  5. Mai 03:40 /usr/lib/librt.so ->
../../lib/librt.so.1

So the 'real' file is actually here: /lib/librt-2.3.6.so

# file /lib/librt-2.3.6.so tells you:
/lib/librt-2.3.6.so: ELF 32-bit LSB shared object, Intel 80386, version 1
(SYSV), stripped

The other 'files' you find are so called 'symbolic links'. This way
differrent programs looking for this library can find it in different
directories and you still need only one real copy of it, the rest is done
via links.

I guess you should first find out what and where your application (iges-g)
is looking for. Just type the folloing in the directory where your app
lives:

# ldd iges-g

As an example if I want to figure out which libraries 'rpict' needs I type:

# ldd /opt/radiance/bin/rpict
        linux-gate.so.1 =>  (0xffffe000)
        libm.so.6 => /lib/libm.so.6 (0xb7efc000)
        libc.so.6 => /lib/libc.so.6 (0xb7dec000)
        /lib/ld-linux.so.2 (0xb7f28000)

This will show you exactlty where your binary finds (or doesn't) the
libaries it needs. Then you can just make a symbolic link from the real
location of 'librt.so' to where it is expected by 'ides-g'.

Hope this gets you started ;-)

-Erwin
---
Chris Foster wrote:
> Hello,
>
> Does anyone know how to use BRL-CAD? I have a simple .igs file and am
> tryin to convert it into a .g (BRLCAD format) and from that into a .obj
> format so that i can use it in radiance. (i cannot do a straight .igs to
> .obj transformation with BRLCAD).
>
> Im following the manuel that came with BRLCAD and Lars has helped me alot,
> however im still stuck (and simple!)
>
> I have my iges-g, g-obj and .igs file in the same directory (brlcad), but
> when i type (in a shell window)
>
> 'iges-g -o picture.o picture.igs'  <------------taken from manuel
> previously mentioned
>
> It tells me this
>
> displays at cropston brlcad]$ ./iges-g -o 42211A.g 42211A.igs
> ./iges-g: error while loading shared libraries: librt.so.19: cannot open
> shared object file: No such file or directory
>
> ive located this librt.so.19 file and moved it to the same directory to
> see if that was the problem but it isnt. i cant open this librt file with
> kwrite either.
>
> points of note.
> im using a linux system.
> im useless on computers
> i downloaded the brlcad-7.8.0_linux_ia32.tar.bz2 version of BRLCAD from
> sourceforge.net, a link from brlcad.org
>
> can anyone help??
>
> thanks in advance
>
> chris
>
>
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