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From: Ron Parker
Subject: Re: Septic? I don't think so... (~29kbau)
Date: 11 Jan 2000 10:22:07
Message: <387b4a9f@news.povray.org>
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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] pacbell net> 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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>Well then are pi's square ?
When I lived in East London, there was a shop there that sold square
pizzas. The best pizza you ever tasted.
PIZZA PIZZA Barking Road E13 < Check it out if you're in the area.
--
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
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