Hi!

I am relatively new to these newsgroups, so this is the
first picture I post here.

My desire was to make smooth bumps on a sphere with
a non patched POV.

Lately I have played around with trigonometry, CSG
and some of the basic shapes in POV.

This picture is one of the results from this experimenting.
Please comment on it.

I'm not at all good with pigments, textures or light settings.
Any suggestions for a better POV-scene with this shape?

Would anyone be interested in a macro that make these
bumps?

And what about other similar macros?
(E.g. outward bumps or inward bumps with smooth
outward edges.)

Tor Olav

mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html

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Attachments:
Download 'spherebumps02_06_.jpg' (73 KB)

Preview of image 'spherebumps02_06_.jpg'

What, no checkered floor? ;-)

I like this - are you posting the code? Can the macro be applied to other
shapes or just spheres?

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Tom Melly wrote:
> 
> What, no checkered floor? ;-)
> 
> I like this - are you posting the code? Can the macro be applied to other
> shapes or just spheres?


No kidding though, with a checkered floor, this would be a great
variation on the recent flood of interpretations of the traditional
scene. 

is that a run-on sentance? :)

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Tom Melly wrote:
> 
> What, no checkered floor? ;-)
> 
> I like this - are you posting the code? Can the macro be applied to other
> shapes or just spheres?

Thank you

I'll post the code to p.t.s.f soon.
I just have to tidy up my messy code a bit.

It hasn't become a macro yet, Because I have some thinking left to do to 
make it a macro that is "thoroughly useful".


Tor Olav

mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html

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Tor Olav Kristensen wrote:
> 
> Tom Melly wrote:
> >
> > What, no checkered floor? ;-)
> >
> > I like this - are you posting the code? Can the macro be applied to other
> > shapes or just spheres?
> 
> Thank you
> 
> I'll post the code to p.t.s.f soon.
> I just have to tidy up my messy code a bit.
> 
> It hasn't become a macro yet, Because I have some thinking left to do to
> make it a macro that is "thoroughly useful".

Accidentally I hit one of the control keys together 
with the return key and off my last post went before I 
had finished it.
(A "feature" in Netscape messenger I think.)

I was about to say that the code I used to make 
the bumpy sphere is best suited for spheres.

For making bumps in planes I have made some other code.

The reason I asked about anyone being interested in 
such macros is that that would motivate me to write 
them sooner.

Tor Olav

mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html

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Ross Litscher wrote:
> 
> Tom Melly wrote:
> >
> > What, no checkered floor? ;-)
> >
> > I like this - are you posting the code? Can the macro be applied to other
> > shapes or just spheres?
> 
> No kidding though, with a checkered floor, this would be a great
> variation on the recent flood of interpretations of the traditional
> scene.
> 
> is that a run-on sentance? :)

What do you mean? Do you really want one with a checkered floor???

Well then; how about a floor with smooth up and down CSG-bumps in a 
checkered pattern?

Tor Olav

mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html

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Looks real good, I'd guess you used a sphere, a cone and
took a torus away from it and then took the resulting 
object away from the large sphere.


-- 
Cheers
Steve              email mailto:sjl### [at] ndirectcouk

%HAV-A-NICEDAY Error not enough coffee  0 pps. 

web http://www.ndirect.co.uk/~sjlen/

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Steve wrote:
> 
> Looks real good, 

Thank you!

> I'd guess you used a sphere, a cone and
> took a torus away from it and then took the resulting
> object away from the large sphere.

Yes, you got the general idea. 

And that's the way I would prefer to do it
(making only one last cut from the sphere),
but I haven't figured out the detailed CSG 
for that yet! :)

(For me it seemed a bit complicated, because 
the top of the cone has to be tangential to 
the sphere. An because of that I was afraid 
that the cone would leave some tiny leftovers 
near the edges of the bump.)

I posted my code to the povray.text.scene-files
news group. 

(My bumps are placed in the middle of the 
pentagons and hexagons of a Buckminsterfullerene.
And because I was to lazy to calculate the 
positions of the bumps and then paste them into 
the source code, you will also find the 
co-ordinates for a whole such "Buckyball" in 
there.)
 
Tor Olav

-- 
mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html

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