Remember the "What is this?" post? Well, this is the result of parsing the
formula through isosurface. It doesn't look like a septic to me. What's

program to get it? Please, tell me POV has the power!

// septic

// anthony bennett
// 8-9(1)2000

background {rgb <0,1,2>/3}

camera
{
 location <1,1,-1>*10
 look_at 0
}

light_source {<1,2,-3>*10 1}

isosurface
{
 function
  z^2*(z-1)^2*(z+1)^2+.2*(x^7-21*x^5*y*2+35*x^3*y^4
 -7*x*y^6+7*x^6+21*x^4*y^2+21*x^2*y^4+7*y^6-56*x^4
 -112*x^2*y^2-56*y^4+112*x^2+112*y^2-64)
 bounded_by {sphere {0,7}}
 pigment {rgb <2,3,1>/3}
 finish {ambient 4/9}
 rotate x*90
}

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Attachments:
Download 'septic.png' (21 KB)

Preview of image 'septic.png'

On Tue, 11 Jan 2000 00:35:02 -0500, TonyB wrote:
>Remember the "What is this?" post? Well, this is the result of parsing the
>formula through isosurface. It doesn't look like a septic to me. What's

>program to get it? Please, tell me POV has the power!

You might try using method 2.  You'll need to specify a maximum gradient;
the larger it is the longer it'll take to parse, but if it's too small 
you'll see effects like what you have there.  Method 1 can also miss
rapid changes in the field value and give you the kind of error you see
in this image.

-- 
These are my opinions.  I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html

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Also, maybe that should be 21*x^5*y^2 instead of 21*x^5*y*2.

Adam C.


TonyB wrote:

> Remember the "What is this?" post? Well, this is the result of parsing the
> formula through isosurface. It doesn't look like a septic to me. What's

> program to get it? Please, tell me POV has the power!
>
> // septic

> // anthony bennett
> // 8-9(1)2000
>
> background {rgb <0,1,2>/3}
>
> camera
> {
>  location <1,1,-1>*10
>  look_at 0
> }
>
> light_source {<1,2,-3>*10 1}
>
> isosurface
> {
>  function
>   z^2*(z-1)^2*(z+1)^2+.2*(x^7-21*x^5*y*2+35*x^3*y^4
>  -7*x*y^6+7*x^6+21*x^4*y^2+21*x^2*y^4+7*y^6-56*x^4
>  -112*x^2*y^2-56*y^4+112*x^2+112*y^2-64)
>  bounded_by {sphere {0,7}}
>  pigment {rgb <2,3,1>/3}
>  finish {ambient 4/9}
>  rotate x*90
> }
>
>  [Image]

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>Also, maybe that should be 21*x^5*y^2 instead of 21*x^5*y*2.


I checked the formulas 5 times, it can't possibly be that... no, wait... it
is! Doh!!! Thanks a million! =)

I'll post the correct image later.

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Adam Coffman wrote:
> 
> Also, maybe that should be 21*x^5*y^2 instead of 21*x^5*y*2.

Does 21*x^5*y^2 = 21*x^5*(y*2) ?

-- 
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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"Ken" <tyl### [at] pacbellnet> wrote in message
news:387B8B75.DE729718@pacbell.net...
>
> Does 21*x^5*y^2 = 21*x^5*(y*2) ?
>

(y*2) if (3*2) equals 6, whereas y^2 if 3^2 equals 9. So no, does not...

Bob

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omniVERSE wrote:
> 
> "Ken" <tyl### [at] pacbellnet> wrote in message
> news:387B8B75.DE729718@pacbell.net...
> >
> > Does 21*x^5*y^2 = 21*x^5*(y*2) ?
> >
> 
> (y*2) if (3*2) equals 6, whereas y^2 if 3^2 equals 9. So no, does not...
> 
> Bob

Well then are pi's square ?

-- 
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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Ken wrote:

> Well then are pi's square ?

At certain Pizza Parlors, yes.

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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Sorry, I can't view png files :(

TonyB wrote:

> Remember the "What is this?" post? Well, this is the result of parsing the
> formula through isosurface. It doesn't look like a septic to me. What's

> program to get it? Please, tell me POV has the power!
>
> // septic

> // anthony bennett
> // 8-9(1)2000
>
> background {rgb <0,1,2>/3}
>
> camera
> {
>  location <1,1,-1>*10
>  look_at 0
> }
>
> light_source {<1,2,-3>*10 1}
>
> isosurface
> {
>  function
>   z^2*(z-1)^2*(z+1)^2+.2*(x^7-21*x^5*y*2+35*x^3*y^4
>  -7*x*y^6+7*x^6+21*x^4*y^2+21*x^2*y^4+7*y^6-56*x^4
>  -112*x^2*y^2-56*y^4+112*x^2+112*y^2-64)
>  bounded_by {sphere {0,7}}
>  pigment {rgb <2,3,1>/3}
>  finish {ambient 4/9}
>  rotate x*90
> }
>
>                  Name: septic.png
>    septic.png    Type: application/x-unknown-content-type-PaintShopPro
>              Encoding: x-uuencode

--
Samuel Benge

E-Mail: STB### [at] aolcom

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

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Looks like an ANTI-septic to me but then I do object to microbes.

Jim

--

TonyB <ben### [at] panamaphoenixnet> wrote in message
news:387ac0e4$1@news.povray.org...
> Remember the "What is this?" post? Well, this is the result of parsing the
> formula through isosurface. It doesn't look like a septic to me. What's

surf
> program to get it? Please, tell me POV has the power!
>
> // septic

> // anthony bennett
> // 8-9(1)2000
>
> background {rgb <0,1,2>/3}
>
> camera
> {
>  location <1,1,-1>*10
>  look_at 0
> }
>
> light_source {<1,2,-3>*10 1}
>
> isosurface
> {
>  function
>   z^2*(z-1)^2*(z+1)^2+.2*(x^7-21*x^5*y*2+35*x^3*y^4
>  -7*x*y^6+7*x^6+21*x^4*y^2+21*x^2*y^4+7*y^6-56*x^4
>  -112*x^2*y^2-56*y^4+112*x^2+112*y^2-64)
>  bounded_by {sphere {0,7}}
>  pigment {rgb <2,3,1>/3}
>  finish {ambient 4/9}
>  rotate x*90
> }
>
>
>

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