On 5/31/2017 3:17 PM, Bald Eagle wrote:
> Stephen <mca### [at] aolcom> wrote:
>
>> Maybe one of the smart people could help.
>
> Be sure to take your frog pills today.

Woops! Thanks for reminding me. :)

> And wipe your chin.
>
>

I have a nice young nurse to do that for me. :)

>> I knew there were a lot but seeing a visualisation puts it in
>> perspective. I wonder if there is an available data set of all the space
>> junk whizzing around the Earth?
>
>
> I think that there is.   Likely even Google has some of it.

Job done:
https://www.youtube.com/watch?v=3kBHaFcg0Z4

Actually looking at that video. My PC shut itself down and said it was 
on strike. ;)
>
> I need to figure out how to reject badly-formed data, like the E's, the MPE's,
> the MPO's, etc in the data set, so I don't have to manually delete them.
> I also need to figure out how to plot the objects that look like they have
> parabolic paths.   I haven't yet reasoned that out or investigated the equations
> and parameters for those yet.
> I can't imagine that there are things with hyperbolic orbits - but the universe
> is a surprising place.
>
> So, I have the planets, a lot of the moons, and asteroids.
>
> UV mapping of the planets and moons.
> (BTW, I really like the way your Earth looks with the normal mapping - I haven't
> gotten that far yet)
>
> A realistic starfield in the background would be nice - esp if there were some
> actual constellations in approx the right place.  That would make a very nice
> sky_sphere indeed.

Have a look at this with a downloadable image map. Paul used to be a 
regular contributor to these newsgroups.

http://paulbourke.net/miscellaneous/starfield/


> Not sure what else to throw in there - galaxies, nebulae - not sure what's large
> enough to be seen (if I fudge the scaling like I do with the planets and
> moons...)
>
> Comets would be very cool, and some of the man-made-satellite models as well.
>

No sooner said than done.
https://nasa3d.arc.nasa.gov/models

> Also on the list is a nice fly-through path for the camera to travel through the
> solar system and pause around each planetary system for a bit.
>

:)

>
> I suppose each data set for each set of objects could be worked out, and
> included in the central scene file.

Or include files that are loaded when in view.

> Things like the asteroids could be limited
> with a bailout number - which I already have implemented.
>
> ...... and if things get too unwieldly, we can always have Dick Balaska do all the
> animation frames on his render farm  ;)   :D
>
>
>

:)

-- 

Regards
     Stephen

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