Re: [Stellarium-pubdevel] Horizon position

[Steve I. <st...@in...>]

Hi Matthew,

I will make sure to sign my emails more clearly in future. Shiptellarium,
etc? Not so sure about those :-)

I will have a look at the script function you mention - thanks. If not, then
we'll give the ship operators a choice - stick to perspective view and see
less landscape, or have stereographic and see more.

I have found a (rather roundabout) way to change the rotation of the
landscape using LandscapeMgr->loadLandscape(QMap...) which allows me to
reload the landscape and set the decor & ground rotation. It's a bit of a
kludge in that it's reloading the whole thing - but it only needs to happen
every few minutes or when the heading changes, and I would expect the png
files to be cached by Windows. Certainly seems pretty quick on my laptop and
it will be running on some pretty well-specced HP desktops on the ship. So
unless it gives me any grief, please leave the Stellarium core unchanged for
now! I don't think there is much call for a rotatable landscape outside of
what I'm doing...

All the best,
Steve


> -----Original Message-----
> From: Matthew Gates [mailto:mat...@gm...] 
> Sent: Friday, October 31, 2008 7:59 PM
> To: St...@in...; Stellarium developers public mailing list
> Subject: Re: [Stellarium-pubdevel] Horizon position
> 
> On Friday 31 October 2008, Steve Ingamells wrote:
> > Hi Matthew,
> >
> > I suspect that it will have to be the perspective view 
> then, although 
> > a) I prefer stereographic as there's less apparent 
> distortion at wide 
> > FOV, and b) I can't use your CompassMarks plugin in that 
> projection as 
> > it wraps around and up... :-)
> 
> I don't tend to use anything but stereographic, since it 
> seems to perform the best on my machine, so I didn't see the 
> problem.  I'll have a look into that.
> 
> > The reason I asked on the developer list is that I was hoping for 
> > pointers to a programming solution for my plugin to move the 
> > intersection of the horizon with the screen edge in 
> stereographic projection.
> 
> I didn't look at the from on the message, so I didn't realise 
> we were talking shiptellarium (shellarium? boatellaium?).  I 
> thought your post was just a general query.  I should pay 
> more attention!
> 
> Have a look at the latest revision of src/QtScriptMgr.cpp.  
> Specifically at the recently added 
> StelMainScriptAPI::moveToAltAzi.  That should do what you need.
> 
> > As far as landscapes are concerned: well, my next problem is how to 
> > align a landscape with the ship's heading rather than 
> north. I can see 
> > *how* to do it by altering the decorAngleRotatez value and 
> redrawing 
> > but it means I have to add code within the landscape 
> manager as that 
> > variable is private. I didn't want to go inside Stellarium 
> but sooner 
> > or later I will have to, I suppose!
> 
> Mmm, yeah, we didn't count on rotating landscapes.  :-)  
> 
> I don't have an objection to adding a public slot for setting 
> the rotation of the landscape.
> 
> >
> > Thanks and all the best,
> > Steve
>