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.

Post a reply to this message

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/

Post a reply to this message

>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?

Post a reply to this message

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

Post a reply to this message

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

Post a reply to this message

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>

Post a reply to this message

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

Post a reply to this message

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.
|
|


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

Post a reply to this message

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

Post a reply to this message

SamuelT. wrote in message <388FD352.903AC326@aol.com>...
>Sorry! I'm started on it now, though!


No need to apologize, I think.

WCFM (what counts for me) it wouldn't matter ultimately.
Your iso tut is The Basic. It wouldn't matter if you added
more, it would just be an extra. IMHO.

(What is that phrase? A web site is either abandoned or
underconstruction. Yours' 'works' either way.)

The fact that you have communicated a complex [sic]
mathematical idea in such a clear and simple
manner is something that I, a left brain, or was it
right brain, aw shucks, i don't know, but I would
thank you nonetheless.

UmThank,

Peter Warren
war### [at] hotmailcom
I have seen the future and it is...over there.

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This will allow an entire bunch of new abilities for composing unusual
shapes.
Cool indeed.

ReVerSi

Post a reply to this message

Attachments:
Download 'newblob.jpg' (16 KB)

Preview of image 'newblob.jpg'

> The fact that you have communicated a complex [sic]
> mathematical idea in such a clear and simple
> manner is something that I, a left brain, or was it
> right brain, aw shucks, i don't know, but I would
> thank you nonetheless.

sqrt(-3)+1
Left brain = organized/logical
Right brain = creative
(or so they say)

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

Post a reply to this message

> 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?

Yep.
I like blobs because you can model organic-looking stuff without all that
memory-eating time-consuming patch stuff.

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

Post a reply to this message

Ah, I see. It's two spheres each with a differing sine wave.

Reinhard Rettelbach wrote:

> This will allow an entire bunch of new abilities for composing unusual
> shapes.
> Cool indeed.
>
> ReVerSi
>
>   ------------------------------------------------------------------------
>  [Image]

--
Samuel Benge

E-Mail: STB### [at] aolcom

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

Post a reply to this message

I'm afraid so.

Remco de Korte wrote:

>
> Am I right in assuming that I'll need MegaPov for this?

--
Samuel Benge

E-Mail: STB### [at] aolcom

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

Post a reply to this message

David Fontaine wrote in message <3890CED5.DD4CEB57@faricy.net>...
>sqrt(-3)+1
>Left brain = organized/logical
>Right brain = creative
>(or so they say)

I'm left handed.
What about you?

Post a reply to this message

<snip something almost sacred>

OMG ! Think what someone like H.E.Day will be able to make with this!!!!

Juha Leppälä

Post a reply to this message

Peter Warren wrote:

>>sqrt(-3)+1
>>Left brain = organized/logical
>>Right brain = creative
>>(or so they say)
>
>I'm left handed.
>What about you?

One brain,
two hands.


Ingo

-- 
Photography: http://members.home.nl/ingoogni/
Pov-Ray    : http://members.home.nl/seed7/

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>OMG ! Think what someone like H.E.Day will be able to make with this!!!!


I thought about that too. It boggles the mind...

Post a reply to this message

> David Fontaine wrote in message <3890CED5.DD4CEB57@faricy.net>...
> >sqrt(-3)+1
> >Left brain = organized/logical
> >Right brain = creative
> >(or so they say)
>
> I'm left handed.
> What about you?

Right.

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

Post a reply to this message

I'm right-handed, but can write backwards left-handed. It's cool,
because everything, every 'jot and tittle' turns out the same, only
opposite. I guess it's because I was left-handed in preschool, but they
made me write with my right.

Peter Warren wrote:

> David Fontaine wrote in message <3890CED5.DD4CEB57@faricy.net>...
> >sqrt(-3)+1
> >Left brain = organized/logical
> >Right brain = creative
> >(or so they say)
>
> I'm left handed.
> What about you?

--
Samuel Benge

E-Mail: STB### [at] aolcom

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

Post a reply to this message

"SamuelT." wrote:

> I'm right-handed, but can write backwards left-handed. It's cool,
> because everything, every 'jot and tittle' turns out the same, only
> opposite. I guess it's because I was left-handed in preschool, but they
> made me write with my right.

I wonder why they made people do that...

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

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Left comes from the latin word for evil, or sinister. You can't tell in
English, but in Spanish, that would be derecha (right) or diestra and
izquierda (left) or siniestra. So, by this association of left with the
devil, people were forced to do things with the "right" hand. (Hmmm, so that
would make left the "wrong" hand?)

Post a reply to this message

TonyB wrote:
> 
> Left comes from the latin word for evil, or sinister. You can't tell in
> English, but in Spanish, that would be derecha (right) or diestra and
> izquierda (left) or siniestra. So, by this association of left with the
> devil, people were forced to do things with the "right" hand. (Hmmm, so that
> would make left the "wrong" hand?)

Yes but when right is gone what's left is right :)

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

Post a reply to this message

That is most interesting indeed.  Never heard that before.  Wonder what the
world would be like if it were 50-50, lefties and righties.  Much tougher to
figure out the evil ones, huh...?

Bob

"TonyB" <ben### [at] panamaphoenixnet> wrote in message
news:38926df7@news.povray.org...
| Left comes from the latin word for evil, or sinister. You can't tell in
| English, but in Spanish, that would be derecha (right) or diestra and
| izquierda (left) or siniestra. So, by this association of left with the
| devil, people were forced to do things with the "right" hand. (Hmmm, so that
| would make left the "wrong" hand?)
|
|

Post a reply to this message

"Bob Hughes" <omn### [at] hotmailcom?subject=PoV-News:> wrote :
>
> That is most interesting indeed.  Never heard that before.
>

    What is even more interesting, and Ken "I am Left-Handed" Tyler can
correct me on this if I remember wrong, is that it really had nothing to do
with the Devil. The reason this term was used is because the left hand was
traditionally used to wipe one's ass, making it unclean for other uses.

    Anything else will be in p.o.t.

Post a reply to this message

Bill DeWitt wrote:
> 
> "Bob Hughes" <omn### [at] hotmailcom?subject=PoV-News:> wrote :
> >
> > That is most interesting indeed.  Never heard that before.
> >
> 
>     What is even more interesting, and Ken "I am Left-Handed" Tyler can
> correct me on this if I remember wrong, is that it really had nothing to do
> with the Devil. The reason this term was used is because the left hand was
> traditionally used to wipe one's ass, making it unclean for other uses.
> 
>     Anything else will be in p.o.t.

If Bill "I don't know my left from my right" DeWitt would see the FAQ I
posted as a response to one of TonyB's posts to the "discrimination"
thread in p.o-t he will see that question and answer #33 goes into some
detail on this subject very little of which has to do with ass wiping.

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

Post a reply to this message

Should I miss being subscribed to p.o.t.?  Perhaps not.  I sure hope you people
are leaving room for the image binaries group with all the OT stuff that must
still go on there.  And yes, I'm saying this all in jest (less the not
subscribed part).

Bob

"Ken" <tyl### [at] pacbellnet> wrote in message
news:38930BEB.C8270EDF@pacbell.net...
|
| >     Anything else will be in p.o.t.
|
| If Bill "I don't know my left from my right" DeWitt would see the FAQ I
| posted as a response to one of TonyB's posts to the "discrimination"
| thread in p.o-t he will see that question and answer #33 goes into some
| detail on this subject very little of which has to do with ass wiping.

Post a reply to this message

Bob Hughes wrote:
> 
> Should I miss being subscribed to p.o.t.?

You are missing some interesting topics by avoiding it.

> Perhaps not.  I sure hope you people are leaving room for the image
> binaries group with all the OT stuff that must still go on there.

You may have missed the fact that all messages in the off topic group are
set by the news server to automatically expire in 12 days time. That group
is not taking up any serious space on this server at all. Check it out
when you get the time.

>  And yes, I'm saying this all in jest (less the not subscribed part).

And I was jesting in my reply to Bill as well.

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

Post a reply to this message

> > Should I miss being subscribed to p.o.t.?
>
> You are missing some interesting topics by avoiding it.

Correction--missing some time-consuming, long-winded, pointless debates by
avoiding it.

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

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David Fontaine wrote:

> > > Should I miss being subscribed to p.o.t.?
> >
> > You are missing some interesting topics by avoiding it.
>
> Correction--missing some time-consuming, long-winded, pointless debates by
> avoiding it.
>

Yes, definitely.


--
"My new computer's got the clocks, it rocks
But it was obsolete before I opened the box" - W.A.Y.

Post a reply to this message

David Fontaine wrote:
> 
> > > Should I miss being subscribed to p.o.t.?
> >
> > You are missing some interesting topics by avoiding it.
> 
> Correction--missing some time-consuming, long-winded, pointless debates by
> avoiding it.

  Since your name appears in that group close to 110 times, 40 of which are
are in the "for your info" thread, and all in a two week period I would say
you ain't no angel either. Then again neither am I :)

Bob,

  Despite what Jon and David have said there are some interesting topics
going on. A rencent one deals with computer security and has been a real
eye opener. Follow this link and find out how secure your system is against
outside attempts to access your computer while you are online - 
https://grc.com/x/ne.dll?bh0bkyd2


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

Post a reply to this message

"Ken" <tyl### [at] pacbellnet> wrote in message
news:389374A3.B8971A4D@pacbell.net...
| Follow this link and find out how secure your system is against
| outside attempts to access your computer while you are online -
| https://grc.com/x/ne.dll?bh0bkyd2

What?! And get accessed?  ;-)
Well, yes, I did know about the expiring messages there, not that I remembered
it until reminded though.  I agree with both viewpoints actually, I just thought
I was saving time by not dropping in there.  I will take another look, but no
guarantee I'll stay.

Bob

Post a reply to this message

On Sat, 29 Jan 2000 10:44:10 -0500, Bill DeWitt 
<the### [at] earthlinknet> wrote:
>
>"Bob Hughes" <omn### [at] hotmailcom?subject=PoV-News:> wrote :
>>
>> That is most interesting indeed.  Never heard that before.
>>
>
>    What is even more interesting, and Ken "I am Left-Handed" Tyler can
>correct me on this if I remember wrong, is that it really had nothing to do
>with the Devil. The reason this term was used is because the left hand was
>traditionally used to wipe one's ass, making it unclean for other uses.

I don't use my hand, I use toillet paper.

This certainly puts a new twist on Bill taking the gloves off Dewitt.

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

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

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

or  http://start.at/zero-pps

  2:25am  up 1 day, 54 min,  4 users,  load average: 2.20, 2.17, 2.11

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"Steve" <sjl### [at] zero-ppslocaldomain> wrote :
>
> This certainly puts a new twist on Bill taking the gloves off Dewitt.
>

    And we all know how painful that can be.

Post a reply to this message

Ken wrote:

> David Fontaine wrote:
> >
> > > > Should I miss being subscribed to p.o.t.?
> > >
> > > You are missing some interesting topics by avoiding it.
> >
> > Correction--missing some time-consuming, long-winded, pointless debates by
> > avoiding it.
>
>   Since your name appears in that group close to 110 times, 40 of which are
> are in the "for your info" thread, and all in a two week period I would say
> you ain't no angel either. Then again neither am I :)

Yeah, I know, but now I just click "mark read" and go on to stuff more worthy of
my time. It's getting insane!

> Bob,
>
>   Despite what Jon and David have said there are some interesting topics
> going on. A rencent one deals with computer security and has been a real
> eye opener. Follow this link and find out how secure your system is against
> outside attempts to access your computer while you are online -
> https://grc.com/x/ne.dll?bh0bkyd2

Yes, true. And the Matrix post... :-)

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

Post a reply to this message

David Fontaine wrote:

> Ken wrote:
>
> > David Fontaine wrote:
> > >
> > > > > Should I miss being subscribed to p.o.t.?
> > > >
> > > > You are missing some interesting topics by avoiding it.
> > >
> > > Correction--missing some time-consuming, long-winded, pointless debates by
> > > avoiding it.
> >
> >   Since your name appears in that group close to 110 times, 40 of which are
> > are in the "for your info" thread, and all in a two week period I would say
> > you ain't no angel either. Then again neither am I :)
>
> Yeah, I know, but now I just click "mark read" and go on to stuff more worthy of
> my time. It's getting insane!
>
> > Bob,
> >
> >   Despite what Jon and David have said there are some interesting topics
> > going on. A rencent one deals with computer security and has been a real
> > eye opener. Follow this link and find out how secure your system is against
> > outside attempts to access your computer while you are online -
> > https://grc.com/x/ne.dll?bh0bkyd2
>
> Yes, true. And the Matrix post... :-)

Yes, there are. But I think I'm a bit guilty of some of the "time-consuming" posts,
so I was trying to admit it.  :-)
--
"My new computer's got the clocks, it rocks
But it was obsolete before I opened the box" - W.A.Y.

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LOL!  wups, I thought I was in p.o.t.!

Bob

Post a reply to this message

Hmmm off topic...  but interesting...  <---- is s right handed but VERY
right brained....  (Did someone take out my left hemisphere?????)

"SamuelT." wrote:

> I'm right-handed, but can write backwards left-handed. It's cool,
> because everything, every 'jot and tittle' turns out the same, only
> opposite. I guess it's because I was left-handed in preschool, but they
> made me write with my right.
>
> Peter Warren wrote:
>
> > David Fontaine wrote in message <3890CED5.DD4CEB57@faricy.net>...
> > >sqrt(-3)+1
> > >Left brain = organized/logical
> > >Right brain = creative
> > >(or so they say)
> >
> > I'm left handed.
> > What about you?
>
> --
> Samuel Benge
>
> E-Mail: STB### [at] aolcom
>
> Visit the still unfinished isosurface tutorial:
> http://members.aol.com/stbenge

Post a reply to this message