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Not sure about the perspective issue, but you know best. To be clear,
the bond attached to the hydrogen is in the plane of the screen and to
the left of the hydrogen.
It shouldn't be necessary in normal use to have to visualise the pick
point, but probably would be useful to resolve (or not) this issue.
- Noel
On 5 March 2013 12:42, Marcus D. Hanwell <marcus.hanw...@kitware.com> wrote:
> On Tue, Mar 5, 2013 at 4:24 AM, Noel O'Boyle <baoille...@gmail.com> wrote:
>> Hey there,
>>
>> I used an automated GUI tester to investigate where Avogadro accepts
>> clicks on a hydrogen:
>> http://baoilleach.blogspot.co.uk/2013/03/avogadro-hydrogen-clicking-craziness.html
>> (see comments there also for a discussion of the issues).
>>
>> I would argue that the centre of the hydrogen is the logical place,
>> but it seems that the sweet spot has been pushed towards the end of
>> the bond.
>>
> I see Geoff's comments on the post already, and he added this to
> Avogadro. It never felt right to me either, but it was hard to gauge
> how many people were wanting to click on a hydrogen to do stuff (such
> as change element type to build up a larger molecule with add
> hydrogens). I would argue that for many structures drawing the
> backbone and adding hydrogens at the end is the quickest way, but we
> obviously want to be as flexible as we can here and many people like
> the addition of hydrogens as they go.
>
> It looks to me like the center is just pushed to where the center of
> the sphere is, with a smaller radius, due to the perspective
> projection. I once changed the code a little to look at rendered
> versus picking, it wouldn't be hard to render that to show more
> clearly what is happening and perhaps at least tweak if not remove
> this. It probably wouldn't take much to add an option to turn this on
> and off, as we did for the navigation rendering you didn't like.
>
> Marcus
>
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