Re: [OpenBabel-Devel] Modest Proposal - Gen3D won't do conformer searching

2018-06-14 Thread Koes, David
Not optimizing will result in a lousy conformer. The default should not generate poor bond lengths or angles. I’m less concerned about torsions. -Dave > On Jun 14, 2018, at 5:20 PM, Geoffrey Hutchison > wrote: > > Hi, > > One of the GSoC projects this summer is an improved fragment-based

Re: [OpenBabel-Devel] Implementation of s-type Slater orbitals in open babel

2018-06-14 Thread Geoffrey Hutchison
> I know that Open Babel already has several charge models, but none are > documented currently, and so I have no clue what to do with them except > calculate the values and write them out. That's probably a matter for me to improve the documentation. Generally people assign charges for force

[OpenBabel-Devel] Modest Proposal - Gen3D won't do conformer searching

2018-06-14 Thread Geoffrey Hutchison
Hi, One of the GSoC projects this summer is an improved fragment-based coordinate generation method. While that's going, I've been reading a lot of papers on 3D coordinate generation. As near as I can tell, no other program attempts to do a conformer search as part of the 3D generation.

Re: [OpenBabel-Devel] Implementation of s-type Slater orbitals in open babel

2018-06-14 Thread Noel O'Boyle
Hi Mohammad, Just to take a step back, could you describe how users of Open Babel will benefit from this? That is, what they might use these charges for? I know that Open Babel already has several charge models, but none are documented currently, and so I have no clue what to do with them except

Re: [OpenBabel-Devel] Invalidation of aromaticity flags

2018-06-14 Thread Noel O'Boyle
I forgot to say that the background to all of this is that I was writing up docs describing the handling of aromaticity in Open Babel, and when I got to the section describing DeleteAtom() I found that the behaviour was not how I thought. - Noel On 14 June 2018 at 07:03, Noel O'Boyle wrote: >

[OpenBabel-Devel] Invalidation of aromaticity flags

2018-06-14 Thread Noel O'Boyle
Hi all, I've sent in a pull request ( https://github.com/openbabel/openbabel/pull/1847) regarding to DeleteAtom() and aromaticity, and Geoff asked me to bring it up here. Currently, when you delete an atom (to be exact, it's actually Begin/EndModify that I'm changing), the flag that indicates