POV-Ray : Newsgroups : povray.newusers : Placing objects on a height field Server Time
5 Sep 2024 04:19:30 EDT (-0400)
  Placing objects on a height field (Message 11 to 20 of 20)  
<<< Previous 10 Messages Goto Initial 10 Messages
From: Warp
Subject: Re: Placing objects on a height field
Date: 23 May 2002 18:13:53
Message: <3ced69a1@news.povray.org>
Simon Lemieux <Rei### [at] sympaticoca> wrote:
> PS: does the 3.5 has the isofunctions?

  What are isofunctions?

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


Post a reply to this message

From: Simon Lemieux
Subject: Re: Placing objects on a height field
Date: 24 May 2002 15:15:16
Message: <3CEE9394.651C0654@sympatico.ca>
>   What are isofunctions?

Frankly, I have no idea... yet...!

But I shall discover soon!

-- 
    "Neuromancer," the boy said.  "The lane to the land of the 
dead.  Where you are, my friend.  I call up the dead.  But no,
my friend, I am the dead, and their land."    (William Gibson)
--  Simon Lemieux  (Rei### [at] Sympaticoca)


Post a reply to this message

From: Warp
Subject: Re: Placing objects on a height field
Date: 24 May 2002 15:25:35
Message: <3cee93af@news.povray.org>
Simon Lemieux <Rei### [at] sympaticoca> wrote:
>>   What are isofunctions?

> Frankly, I have no idea... yet...!

> But I shall discover soon!

  I know functions and isosurfaces, but I don't know what are isofunctions.

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


Post a reply to this message

From: Tom Melly
Subject: Re: Placing objects on a height field
Date: 25 May 2002 15:33:59
Message: <3cefe727@news.povray.org>
"Warp" <war### [at] tagpovrayorg> wrote in message
news:3cee93af@news.povray.org...
>
>   I know functions and isosurfaces, but I don't know what are
isofunctions.
>

Don't worry about it - they're for advanced users.


Post a reply to this message

From: Warp
Subject: Re: Placing objects on a height field
Date: 25 May 2002 16:31:53
Message: <3ceff4b9@news.povray.org>
Tom Melly <tom### [at] tomandlucouk> wrote:
>>   I know functions and isosurfaces, but I don't know what are
> isofunctions.

> Don't worry about it - they're for advanced users.

  Could you explain it to a newuser like me?-)

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


Post a reply to this message

From: Ken
Subject: Re: Placing objects on a height field
Date: 26 May 2002 08:47:42
Message: <3CF0DA25.13EC5823@pacbell.net>
Warp wrote:
> 
> Tom Melly <tom### [at] tomandlucouk> wrote:
> >>   I know functions and isosurfaces, but I don't know what are
> > isofunctions.
> 
> > Don't worry about it - they're for advanced users.
> 
>   Could you explain it to a newuser like me?-)

I doubt that's possible...

-- 
Ken Tyler


Post a reply to this message

From:
Subject: Re: Placing objects on a height field
Date: 27 May 2002 04:21:00
Message: <p0r3fusrh78ms7i92b6b0abm2dfcv49vci@4ax.com>
On 25 May 2002 16:31:53 -0400, Warp <war### [at] tagpovrayorg> wrote:
> > >   I know functions and isosurfaces, but I don't know what are
> > isofunctions.
>
> > Don't worry about it - they're for advanced users.
>
>  Could you explain it to a newuser like me?-)

They must be functions after standarization :-)

ABX


Post a reply to this message

From: Simon Lemieux
Subject: Re: Placing objects on a height field
Date: 28 May 2002 23:24:08
Message: <3CF44C5F.CB66EB5E@sympatico.ca>
> >>   What are isofunctions?
> 
> > Frankly, I have no idea... yet...!
> 
> > But I shall discover soon!
> 
>   I know functions and isosurfaces, but I don't know what are isofunctions.

Hehe, pardon, my newbieness or shall I say my
too-long-since-my-last-ray-traceness...  I did mix these two up, I was
talking about isosurfaces which seems to be the kind of abstract
mathematical objects made for me!

Thanks,
  Simon

-- 
    "Neuromancer," the boy said.  "The lane to the land of the 
dead.  Where you are, my friend.  I call up the dead.  But no,
my friend, I am the dead, and their land."    (William Gibson)
--  Simon Lemieux  (Rei### [at] Sympaticoca)


Post a reply to this message

From: Warp
Subject: Re: Placing objects on a height field
Date: 29 May 2002 08:45:23
Message: <3cf4cd63@news.povray.org>
Simon Lemieux <Rei### [at] sympaticoca> wrote:
>>   I know functions and isosurfaces, but I don't know what are isofunctions.

> Hehe, pardon, my newbieness or shall I say my
> too-long-since-my-last-ray-traceness...  I did mix these two up, I was
> talking about isosurfaces which seems to be the kind of abstract
> mathematical objects made for me!

  An isosurface is an equipotential surface, that is, it consists of all
the points in space where the value of the given function is a given constant
(usually, but not necessarily, 0).

  A similar entity is an isobar. Isobars are 2D lines in a geographic map.
The line consists of all the points where air pressure is the same (a given
constant value).

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


Post a reply to this message

From: Peter Popov
Subject: Re: Placing objects on a height field
Date: 3 Jun 2002 17:08:37
Message: <rcghfugmprb1vf3pvrh2sncidp7k0vtd14@4ax.com>
On 25 May 2002 16:31:53 -0400, Warp <war### [at] tagpovrayorg> wrote:

>  Could you explain it to a newuser like me?-)

Sure. They are functions that return the same value. It's just a geek
name for declaring a float constant, really.

Here's an example:

isofunction theAnswer(x,y,z) = 42;


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg


Post a reply to this message

<<< Previous 10 Messages Goto Initial 10 Messages

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.