Add this on top:
 DGeomHelpers::EmbedMolecule(*mol);

Igor

On Fri, 2008-08-08 at 13:07 +0100, Evgueni Kolossov wrote:
> Thanks - this is kind of works.
> Unfortunately there is no atomic coordinates generated - how we can do
> this? Otherwise it will display just single dot.
> 
> Regards,
> Evgueni
> 
> 
> 2008/8/8 Igor Filippov <[email protected]>
>         The following works for me:
>         
>                std::stringstream ss;
>                SDWriter *writer = new SDWriter(&ss);
>                writer->setProps(propNames);
>                writer->write(*mol);
>                writer->flush();
>                delete mol;
>                delete writer;
>                std::string sdf=ss.str();
>         
>         Igor
>         
>         
>         On Fri, 2008-08-08 at 12:05 +0100, Evgueni Kolossov wrote:
>         >
>         > Dear Greg,
>         >
>         > Can you please show how to extract text from stringstream
>         (which in
>         > your case actually ostream) into string?
>         > ROMol *mol;
>         > mol = SmilesToMol(strSmile);
>         > ostream *ss = new stringstream();
>         > SDWriter *writer = new SDWriter(ss, false);
>         > writer->write(*mol);
>         >
>         > string strMolStructure;
>         > //Now we want to put MDLMol into the string. For
>         stringstream
>         > ss->str() will do the job but ss is ostream....)
>         >
>         > Regards,
>         > Evgueni
>         >
>         >
>         > -----Original Message-----
>         > From: [email protected]
>         > [mailto:[email protected]] On
>         Behalf Of Greg
>         > Landrum
>         > Sent: 05 August 2008 19:07
>         > To: Igor Filippov [Contr]
>         > Cc: [email protected]
>         > Subject: Re: [Rdkit-discuss] SD File output
>         >
>         >
>         > Dear Igor,
>         >
>         > This is a good one for the mailing list, so I'm
>         cross-posting my
>         > reply.
>         >
>         > On Tue, Aug 5, 2008 at 6:47 PM, Igor Filippov [Contr]
>         > <[email protected]> wrote:
>         > >
>         > > Is there any way to convert a mol object into an SD file
>         (i.e. CTAB
>         > > plus user-defined properties) and have the result in a
>         string?
>         > > MolToMolBlock() only outputs CTAB portion without the
>         properties.
>         >
>         > Indeed there is. You can construct an SDWriter (defined in
>         > $RDBASE/GraphMol/FileParsers/MolWriters.h) using a pointer
>         to a
>         > stringstream, then use the SDWriter's write() method. It's
>         probably
>         > safest to call the flush() method before reading your text
>         out of the
>         > stringstream.
>         >
>         > An example for using this with a SmilesWriter is in the
>         function
>         > testSmilesWriter2() in testMolWriter.cpp. Using an SDWriter
>         is exactly
>         > equivalent.
>         >
>         > -greg
>         >
>         >
>         
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>         --
>         Igor Filippov <[email protected]>
>         
> 
> 
> 
> -- 
> Dr. Evgueni Kolossov (PhD)
> [email protected]
> Tel. +44(0)1628 627168
> Mob. +44(0)7812070446
> 
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