[Kstars-devel] Drawing Geodesic Domes on the Sky

[Jason Harris]

Hi James,

Can you send us a screenshot or two?

How did you implement drawing the lines?  I guess you didn't add a 
SkyComponent, but maybe just added the code directly in SkyMap::paintEvent()?

I don't understand the segfaults you're getting; are you saying that HTM is 
returning triangles that are far outside the region it should be returning?

Please take your time, take as long a break as you need.  Don't get burned 
out!  This is supposed to be fun, and besides, we need you :)

regards,
Jason

On Monday 29 May 2006 23:13, James Bowlin wrote:
> I'm drawing HTM's in Kstars.  The segfaults when I asked for corner
> coordinates only happened for levels less than 6.  It doesn't always
> segfault at the lower levels and I am able to draw some of those triangles
> but things certainly appear to be broken.  For example, the cluster of
> triangles is not anywhere near the center of the clip region.  I want to go
> back and carefully check the id strings for the triangles from the lower
> level intersections.  This does remind of the problems I had when I tried
> to use their built-in circleRegion() routine.  It seemed to be giving
> me roughly the right number of indices but they were clearly out of wack.
>
> The good news is that the graphics show that for levels 6 and above the
> HTM code is working as advertised.  This, together with the timing results,
> makes me feel like the HTM's can be useful to us.
>
> The userLines show up when I save a sky image so I can send you png's
> if anyone is interested.  The FOV symbols don't show up on the images.
> I figure this is probably a feature and not a bug, but it was kind of
> cool to use custom FOV's to show the outline of the shape that the
> triangular mesh was trying to cover.  It is fun to be working on a
> program that is already full of so many useful features.
>
> I'm tiring out so I am going to have to move at a slower pace.  Maybe
> let this rest for a few days.  When I come back, I'm going to try to
> track down the problems with the courser meshes.

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