Hello everybody. I was a bit concerned about how I told everyone a
future isosurface tutorial would show them how to blob functions
together (spheres, cylinders, torii - you name it). I could actually do
it back then, but learned that the method had very inconsistant results.
I was starting to think I might never actually be able to blob stuff
together very good at all. That is, until the other day, when I was
trying some new functions.

Attached is a before and after image of an isosurface. The first
isosurface has 2 cylinders, 1 sphere and 1 torus all merged together.
You can do this with normal pov. The second shows how well my new
blobbing method works. There seems to be very little size-reduction in
the original components, making this method very easy to control. You
can be assured this technique will be making it into a tutorial :)

Any thoughts? Critiques?

--
Samuel Benge

E-Mail: STB### [at] aolcom

Website under construction.

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Attachments:
Download 'blobbed.jpg' (18 KB)

Preview of image 'blobbed.jpg'

"SamuelT." wrote:

> Any thoughts?

Start writing :)

-- 
Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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>Hello everybody. I was a bit concerned about how I told everyone a
>future isosurface tutorial would show them how to blob functions
>together (spheres, cylinders, torii - you name it). I could actually do
>it back then, but learned that the method had very inconsistant results.
>I was starting to think I might never actually be able to blob stuff
>together very good at all. That is, until the other day, when I was
>trying some new functions.


When you recommended the thing back then, and it let to my torusblob and
boxblob images, you said to multiply the formulas for one object and the
other, and this worked great. What changes or new discoveries did you make?

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The function now looks like this:

#declare Thr=.000000001;

function
  (1+Thr)
  -Thr^(x^2+y^2+.95) //cylinder
  -Thr^(y^2+z^2+.95) //cylinder
  -Thr^( sqr(x^2+z^2-.6)+.975+sqr(y*2) ) //toru
  -Thr^(x^2+sqr(y-.5)+z^2+.75) //sphere
 threshold 1 sign 1


TonyB wrote:

> >Hello everybody. I was a bit concerned about how I told everyone a
> >future isosurface tutorial would show them how to blob functions
> >together (spheres, cylinders, torii - you name it). I could actually do
> >it back then, but learned that the method had very inconsistant results.
> >I was starting to think I might never actually be able to blob stuff
> >together very good at all. That is, until the other day, when I was
> >trying some new functions.
>
> When you recommended the thing back then, and it let to my torusblob and
> boxblob images, you said to multiply the formulas for one object and the
> other, and this worked great. What changes or new discoveries did you make?

--
Samuel Benge

E-Mail: STB### [at] aolcom

Visit the still unfinished isosurface tutorial: http://members.aol.com/stbenge

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I will, once I finish the tutorial for noise3d, displacement mapping and
sin/cos :P

Ken wrote:

> "SamuelT." wrote:
>
> > Any thoughts?
>
> Start writing :)
>
> --
> Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
> http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

--
Samuel Benge

E-Mail: STB### [at] aolcom

Visit the still unfinished isosurface tutorial:
http://members.aol.com/stbenge

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SamuelT. wrote:

> I was starting to think I might never actually be able to blob stuff
> together very good at all. That is, until the other day, when I was trying
> some new functions.

<snip>

> You can be assured this technique will be making it into a tutorial :)
>
> Any thoughts? Critiques?

Yea. I look forward to the tutorial. In the meantime, could we see the code
for this scene so we can play with it? :{)

David
--
Keeper of the family pets.
"You want fish? I got fish. I got fish, and eels, and turtles, and snails, and
frogs, and dragons and cats..."

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This is great progress! (I am among the many that have visited your tutorial
off and on and have been disappointed by the fact that after so many months it
still says more to come with nothing added...)

--
Homepage: http://www.faricy.net/~davidf/
___     ______________________________
 | \     |_       <dav### [at] faricynet>
 |_/avid |ontaine      <ICQ 55354965>

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Sorry! I'm started on it now, though!

David Fontaine wrote:

> This is great progress! (I am among the many that have visited your tutorial
> off and on and have been disappointed by the fact that after so many months it
> still says more to come with nothing added...)
>
> --
> Homepage: http://www.faricy.net/~davidf/
> ___     ______________________________
>  | \     |_       <dav### [at] faricynet>
>  |_/avid |ontaine      <ICQ 55354965>

--
Samuel Benge

E-Mail: STB### [at] aolcom

Visit the still unfinished isosurface tutorial: http://members.aol.com/stbenge

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I tried to "free view" it and my eyes pleaded with me to stop.
I think it'll make for some great coated objects such as paint or rubber
coatings.
If I get what you are saying about no size reduction of the original converted
to iso'd objects then it definitely is good for things with coatings on them.

Bob

"SamuelT." <STB### [at] aolcom> wrote in message news:388FBE50.66AF0DD7@aol.com...
| Hello everybody. I was a bit concerned about how I told everyone a
| future isosurface tutorial would show them how to blob functions
| together (spheres, cylinders, torii - you name it). I could actually do
| it back then, but learned that the method had very inconsistant results.
| I was starting to think I might never actually be able to blob stuff
| together very good at all. That is, until the other day, when I was
| trying some new functions.
|
| Attached is a before and after image of an isosurface. The first
| isosurface has 2 cylinders, 1 sphere and 1 torus all merged together.
| You can do this with normal pov. The second shows how well my new
| blobbing method works. There seems to be very little size-reduction in
| the original components, making this method very easy to control. You
| can be assured this technique will be making it into a tutorial :)
|
| Any thoughts? Critiques?
|
| --
| Samuel Benge
|
| E-Mail: STB### [at] aolcom
|
| Website under construction.
|
|


--------------------------------------------------------------------------------

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SamuelT. wrote:
> 
> Hello everybody. I was a bit concerned about how I told everyone a
> future isosurface tutorial would show them how to blob functions
> together (spheres, cylinders, torii - you name it). I could actually
> do
> it back then, but learned that the method had very inconsistant
> results.
> I was starting to think I might never actually be able to blob stuff
> together very good at all. That is, until the other day, when I was
> trying some new functions.
> 
> Attached is a before and after image of an isosurface. The first
> isosurface has 2 cylinders, 1 sphere and 1 torus all merged together.
> You can do this with normal pov. The second shows how well my new
> blobbing method works. There seems to be very little size-reduction in
> the original components, making this method very easy to control. You
> can be assured this technique will be making it into a tutorial :)
> 
> Any thoughts? Critiques?
> 
> --
> Samuel Benge
> 
> E-Mail: STB### [at] aolcom
> 
> Website under construction.
> 
>     ---------------------------------------------------------------
>  [Image]

I'm addicted to blobs.
If this can do what it appears to be able off I'm hooked for life.
I remember some earlier messages about this and the images TonyB posted.
Am I right in assuming that I'll need MegaPov for this?

Remco

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