I did this to visualize my homework in "Vector Calculus" class today. Neat
feature, these isosurfaces. I know that it probably was possible to do with
std. pov, but it's so much easier to write "2xy^2/(x^2+y^4) instead of a
buch of zeroes and ones. ;-)

Notice the _nice_ discontinuities when you approach (0, 0, 0) along either
side of the x-axis.. *drool*

5k.

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Attachments:
Download 'surf01.jpg' (42 KB)

Preview of image 'surf01.jpg'

I'll be doing this next term. Please share your code with me! Please?
I havne't figured out an easy way to use the right handed coordinate system the
book uses in POV-Ray, which is the same right handed system you display here,
but all the illustraions are from the other side

Simen Kvaal wrote:

> I did this to visualize my homework in "Vector Calculus" class today. Neat
> feature, these isosurfaces. I know that it probably was possible to do with
> std. pov, but it's so much easier to write "2xy^2/(x^2+y^4) instead of a
> buch of zeroes and ones. ;-)
>
> Notice the _nice_ discontinuities when you approach (0, 0, 0) along either
> side of the x-axis.. *drool*
>
> 5k.
>
>  [Image]

--
Josh English
eng### [at] spiritonecom
"May your hopes, dreams, and plans not be destroyed by a few zeros."

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Simen Kvaal wrote:

> I did this to visualize my homework in "Vector Calculus" class today. Neat
> feature, these isosurfaces. I know that it probably was possible to do with
> std. pov, but it's so much easier to write "2xy^2/(x^2+y^4) instead of a
> buch of zeroes and ones. ;-)

"Vector calculus"--what grade are you in?
(Yeah! Finished all my homework for the week during class in math! Wish I
hadn't had two friggin' years of repeat in middle school...)

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David Fontaine <dav### [at] faricynet> wrote in message
news:38A### [at] faricynet...
> Simen Kvaal wrote:
>
> > I did this to visualize my homework in "Vector Calculus" class today.
Neat
> > feature, these isosurfaces. I know that it probably was possible to do
with
> > std. pov, but it's so much easier to write "2xy^2/(x^2+y^4) instead of a
> > buch of zeroes and ones. ;-)
>
> "Vector calculus"--what grade are you in?
> (Yeah! Finished all my homework for the week during class in math! Wish I
> hadn't had two friggin' years of repeat in middle school...)
>
>


Dah! Math!! I've been in college nearly four years. this is the first
quarter I havn't had a math class.

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Josh English <eng### [at] spiritonecom> writes:

> I havne't figured out an easy way to use the right handed coordinate system 
> the book uses in POV-Ray, which is the same right handed system you display 
> here, but all the illustraions are from the other side

I have not tried this, but shouldn't 

camera {
  right -4/3*x
  sky z
  location <soandso>
  look_at <anotherpoint>
}

work? Read the section "Placing the camera" in the POV-Ray reference
to learn more about these values.

Thomas

-- 
http://thomas.willhalm.de/ (includes pgp key)

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>"Vector calculus"--what grade are you in?

It's the name of the book, by Mardsden and Troma. Second half of first year
in Univeristy of Oslo, Norway. We're learning analysis if functions with
several variables. You know, this is _the_ class for POV-ray users! After
three weeks, I know enough maths to write my own isosurface code! (I don't
mean to _use_ the isosurfaces, but to code the program itself... That is, If
I was any good at C++ ;)

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In article <38a28217@news.povray.org>, "Simen Kvaal" 
<sim### [at] studentmatnatuiono> wrote:

> >"Vector calculus"--what grade are you in?
> 
> It's the name of the book, by Mardsden and Troma. Second half of 
> first year in Univeristy of Oslo, Norway. We're learning analysis if 
> functions with several variables. You know, this is _the_ class for 
> POV-ray users! After three weeks, I know enough maths to write my own 
> isosurface code! (I don't mean to _use_ the isosurfaces, but to code 
> the program itself... That is, If I was any good at C++ ;)

But POV isn't written in C++, it is written in C. :-)
Although there are plans to rewrite it in C++ for version 4...

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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On Thu, 10 Feb 2000 10:17:08 +0100, Simen Kvaal wrote:
>>"Vector calculus"--what grade are you in?
>
>It's the name of the book, by Mardsden and Troma. 

I think I have that book!  But isn't it Tromba?

-- 
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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What is this "Math" you speak of?

coo kook achew,

Peter W

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Thanks, will all of the experimenting I've done with the camera I couldnt' get it
to work. Your code is just what I need.
Thanks

Thomas Willhalm wrote:

> Josh English <eng### [at] spiritonecom> writes:
>
> > I havne't figured out an easy way to use the right handed coordinate system
> > the book uses in POV-Ray, which is the same right handed system you display
> > here, but all the illustraions are from the other side
>
> I have not tried this, but shouldn't
>
> camera {
>   right -4/3*x
>   sky z
>   location <soandso>
>   look_at <anotherpoint>
> }
>
> work? Read the section "Placing the camera" in the POV-Ray reference
> to learn more about these values.
>
> Thomas
>
> --
> http://thomas.willhalm.de/ (includes pgp key)

--
Josh English
eng### [at] spiritonecom
"May your hopes, dreams, and plans not be destroyed by a few zeros."

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