I don't want an elliptic sun (part II).... (advanced 3d patch placement )

[Andrea Viarengo]

Hello Chriss,

I'm returning to the application for orienting a patch to the viewer
given azimuth and elevation.

Your modification of my setpos(p,dis,az,el) works very fine with a sun image
which has a circular symmetry,
so, rotation around its perpendicular axis pointing inward,
does not matter very much,

but how could I calculate parameter "angle" (that we haven't included before
in the "move" statement), so the bottom of the patch remains parallel
to the "xz" plane for every value of azimuth and elevation? (i.e.: in other
words, if I write something into the patch, I would like that the text
remained parallel to the ground)

You are very good at trigonometry, I am sure that this will take just a moment!!

Thank you!!

Andrea



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[Christian Walther]

Andrea Viarengo wrote:
> how could I calculate parameter "angle" (that we haven't included before
> in the "move" statement), so the bottom of the patch remains parallel
> to the "xz" plane for every value of azimuth and elevation? (i.e.: in other
> words, if I write something into the patch, I would like that the text
> remained parallel to the ground)
>
> You are very good at trigonometry, I am sure that this will take just a moment!!

Well, I guess I could work out the math... but I think it would be
easier to just implement the specifiable rotation order. Would that be
acceptable to you (i.e. you would have to use your own build and/or wait
for the next release)?

  -Christian


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[Andrea Viarengo]

Christian Walther <cwalther <at> gmx.ch> writes:

>
> Would that be
> acceptable to you (i.e. you would have to use your own build and/or wait
> for the next release)?
>

Yes, would be acceptable...

if the next release are not coming in a year... ;) (I'm joking...)

Ok.

-Andrea



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[Christian Walther]

OK, the "rotationorder" property (including documentation) is now in SVN
as revision 203. Andrea, are you still set up to build things yourself,
or shall I make you a pre-release Windows build?

Good night (I'll get to the other recent posts tomorrow)

  -Christian


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