POV-Ray : Newsgroups : povray.binaries.tutorials : Re: INFO: Inverse Server Time
28 Mar 2023 02:40:32 EDT (-0400)
  Re: INFO: Inverse (Message 1 to 2 of 2)  
From: Josh English
Subject: Re: INFO: Inverse
Date: 27 Apr 1999 12:13:36
Message: <3725D3EB.77FF5EE3@spiritone.com>
Inverse only applies to unions, differences, etc...

You want to apply a warp statement to the object.
from the docs...

However, by specifying our turbulence inside warp statement you tell
POV-Ray that the order in which turbulence, transformations and other
warps are applied is significant. Here's an example of a turbulence warp.

  warp { turbulence <0,1,1> octaves 3 lambda 1.5 omega 0.3 }

The significance is that this

 pigment {
   wood
   translate <1,2,3> rotate x*45 scale 2
   warp { turbulence <0,1,1> octaves 3 lambda 1.5 omega 0.3 }
 }

produces different results than this...

 pigment {
   wood
   warp { turbulence <0,1,1> octaves 3 lambda 1.5 omega 0.3 }
   translate <1,2,3> rotate x*45 scale 2
 }

You may specify turbulence without using a warp statement. However you
cannot control the order in which they are evaluated unless you put them
in a warp


Josh English
eng### [at] spiritonecom
Hassoun wrote:

> Hi
> can i use "inverse" to reverse the order (or the sequence) in which
> objects are modified (translated, rotated, scaled)? any info of how to
> do this operation?
>
> thanks in advance
> Hassoun


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From: Ron Parker
Subject: Re: INFO: Inverse
Date: 27 Apr 1999 13:33:03
Message: <3725e6bf.0@news.povray.org>
On Tue, 27 Apr 1999 08:12:44 -0700, Josh English wrote:
>Inverse only applies to unions, differences, etc...

Not true.  It applies to all objects with insides.  It just doesn't
usually matter except in CSG (and in bounded_by and clipped_by) and
perhaps with media.


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From: Bob Hughes
Subject: Re: INFO: Inverse
Date: 27 Apr 1999 07:35:15
Message: <372592AE.FB33C438@aol.com>
Please do NOT cross post like this. Especially into such an irrelevant
group for this question.


Hassoun wrote:
> 
> Hi
> can i use "inverse" to reverse the order (or the sequence) in which
> objects are modified (translated, rotated, scaled)? any info of how to
> do this operation?
> 
> thanks in advance
> Hassoun

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 omniVERSE: beyond the universe
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