Rotating Balls [Ben Beaumont]

Richmond Mathewson richmondmathewson at gmail.com
Thu Sep 3 07:12:39 EDT 2009


I was here in my kilt on Tuesday and Wed.; however, spilt some tomato
ketchupon my kilt last night - so wearing jeans today. Kilt again tomorrow.

What the h*ll is this?

This message thread is meant to be about manipulating fillGradient . .  . :)

On Thu, Sep 3, 2009 at 10:17 AM, <runrev260805 at m-r-d.de> wrote:

> Richmond,
>
> btw.: didn´t you want to wear your kilt at the conference?  I remember  a
> list posting someone wanted to do that. Until now i did not see anyone
> wearing one?
> Or are you allways behind the camera?  ;-)
>
> Regards,
>
> Matthias
>
> -------- Original Message --------
> Subject: Rotating Balls [Ben Beaumont] (03-Sep-2009 10:45)
> From:    Richmond Mathewson <richmondmathewson at gmail.com>
> To:      runrev260805 at m-r-d.de
>
> > Ben Beaumont gave a most stimulating talk last night about the jazzy new
> > visual effectsin RR 4. At one point he showed us a simulation of a solar
> > system featuring a sun and
> > 4 or 5 planets in orbit about it. The particularly fancy bit was that the
> > side of a planet
> > facing towards the sun was always 'lit'. Ben Beaumont claimed that this
> > effect was
> > a bit difficult.
> >
> > . . . I went back to my lodgings and jumped into a good, hot bath . . .
> >
> > Bingo: all one has to do is set up a sequence of numbers round a circle
> > like
> > this:
> >
> > repeat with XYZ = 0 to 6.28 step 0.05
> >   put (cos(XYZ) * 150) into KOZ
> >   put (cos(XYZ - 1.54) * 150) into KOZ2
> >   put (sine(XYZ) * 150) into SIGN
> >   put (sine(XYZ - 1.54) * 150) into SIGN2
> >
> >
> > then one sets up a circular graphic of, say, 300,300 with a linear
> > fillGradient of black
> > to green/blue/red and sets the following:
> >
> >   set the fillGradient["to"] to (KOZ + 400),(SIGN + 400)
> >   set the fillGradient["from"] to (KOZ2 + 400),(SIGN2 + 400)
> > end repeat
> >
> > [ mind you, this might be complete rubbish as I haven't tried it yet . .
> .]
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