SWEET!  That's absolutely cool.  And I agree; the retro techno grid 
look, as you call it, is really appealing.  (Tron rocks!) 

Too bad we can't see more of the ball spinning into oblivion in the 'hat.

Great animation.
-Law

None wrote:

>Some more test, Ball rolling on a quartic WitchHat, initial velocity +x only
>(with matching initial -z angular velocity).
>
>Something really appeals to me about that retro techno grid look.  It
>reminds me of the computer images that used to spark my imagination when I
>was much younger.  It must be part of that Tron nostalgia.  Unfortunately
>MPEG hates clear and sharp lines so it heavily dims them, to the point where
>they are quite washed out, and makes a file bigger than it should be,
>despite the I frames having been reduced to a minimum.
>
>The balls' orientation is now stored as a quaternion.  My previous sphere
>rolling attempts never worked quite right.  That rotating on the surface of
>the sphere idea of mine was way off.  That is why I investigated
>quaternions.  It's surprisingly easy to incrementally roll a quaternion and
>the calculations are minimal so precision remains quite high.
>
>
>  
>

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Ghost <flu### [at] duratechindustriesnet> wrote in
news:3f84384b@news.povray.org: 

> SWEET!  That's absolutely cool.  And I agree; the retro techno grid 
> look, as you call it, is really appealing.  (Tron rocks!) 
> 
> Too bad we can't see more of the ball spinning into oblivion in the
> 'hat. 
> [...]

Thanks!  I've looked and the ball just get's stuck in the WitchHat hole 
against the sides when it gets too narrow.  Since the default WitchHat gets 
so steep so quickly, I've tried streching out the WitchHat along X and Z, 
and the ball just goes round and round slowly closing in on the center, 
it's interesting, but too long.

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Wow, I just love the textures - Its exactly the kind of image that got me
into 3D rendering

-- 
Rick

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Actually this also looks a lot like the environment where Homer Simpson
got sucked into the 3D world.
Is there a message in this somewhere?
;)

Remco

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Remco de Korte <rem### [at] onwijscom> wrote in news:3F848383.C2276062
@onwijs.com:

> Actually this also looks a lot like the environment where Homer Simpson
> got sucked into the 3D world.
> Is there a message in this somewhere?
> ;)

OMG, that's true!  I thought it looked really familiar, I actually didn't 
think of that.
If there is a message it's probably: "DOH!"

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It'd be great to see this with two dents, with the chaotic motion of the
ball around them

-Chris

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Hey hey hey... I like it! :-) I've been wanting to do a surface like that
myself, but I'm too thick... Ah well! It is rather neat how the ball rolls
round it like that...

Thanks.
Andrew.

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> > Actually this also looks a lot like the environment where Homer Simpson
> > got sucked into the 3D world.
> > Is there a message in this somewhere?
> > ;)
>
> OMG, that's true!  I thought it looked really familiar, I actually didn't
> think of that.
> If there is a message it's probably: "DOH!"

Wow - I was thinking of that exact episode! lol

But in that, the whole was a bit steaper... the edges were more virtical and
less curved... But anyway...

"Mmm... Doughnut..."

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