In article <3e3fbb38@news.povray.org> , Not My Real Email Address 
<ano### [at] anoncom>  wrote:

> Sorry in advance for the rude tone of this post.

Same for this one.

> 1) documentation: dead link at 'complete list' in paragraph at
> povdoc_082.html#target_141

No, it leads you to section 3.6.3.7 as it is supposed to.

> 2) #version does not set correct value of noise_generator in order to
> recreate images from source code created with previous versions of
> povray (if I am to believe what I hear here).

Not a bug.  It works exactly as documented.

> 3) povray 3.5 does not recreate image correctly from my source code
> generated for previous version of povray (3.0, 3.1-compatible megapov0.5)
> even with global_settings { noise_generator 1 }, optionally also with
> #version 3.0 or #version 3.1.

Not a bug.  The #version directive sets the language version, not the scene
rendering style.  this is pointed out in "6.2.5 The #version Directive" as
well.

> 'noise and pigment functions' in the TOC takes me to
>
>     3.6.3.6  noise and pigment functions

Well, if you are looking in the completely wrong place.  This is a
subsection of "3.6.3 Isosurface Object".  Surely not what you are looking
for.  And the TOC makes quite clear to which section a subsection belongs...

> So I am still in the dark of

Hardly a surprise if you seek information in sections of the documentation
that are unrelated to textures at all...

> whether the 'noise generator' parameter is
> theoretically supposed to fix the problem. But I can tell you it does not
> in practice.

If you don't know how to use it, you should ask here.  The old noise
generator does work exactly as before.  Thousands of users have successfully
used the old noise generator, so blaming POV-Ray for you not knowing how to
use it without having read (not randomly searched) the manual, well...

> And in my opinion, it should NOT be necessary. What is #version 3.0 or
> #version 3.1 supposed to do, if not set values like this to the necessary
> values to recreate a scene made using a previous version of povray?

RTFM.

    Thorsten

Post a reply to this message

On Wed, 05 Feb 2003 05:06:29 +1100, Thorsten Froehlich wrote:

> In article <3e3fbb38@news.povray.org> , Not My Real Email Address
> <ano### [at] anoncom>  wrote:
> 
>> Sorry in advance for the rude tone of this post.
> 
> Same for this one.
> 
>> 1) documentation: dead link at 'complete list' in paragraph at
>> povdoc_082.html#target_141
> 
> No, it leads you to section 3.6.3.7 as it is supposed to.

I'm sorry but it does not. It leads to the same paragraph it occurs in,
as I said. It self-references. It goes nowhere. I will paste the source
html:

<div class="divh4">
<a name="target_141"></a>
<h4>3.6.3.4  internal functions</h4>

  <p>There are a lot of internal functions available in POV-Ray. For example
  a sphere could also be generated with <code>function { f_sphere(x, y, z, 2) }</code>
  These functions are declared in the <code>functions.inc</code> include file.
  Most of them are more complicated and it's usually faster to use them instead of a
  hand coded equivalent. See the
  <a href="#target_141">complete list</a> for details.</p>

Section 3.6.3.7 is titled 'accuracy, max_gradient, etc.' -- doesn't seem
to be a 'complete list' of anything. Certainly nothing to do with the
'noise generator' function or patterns generated any which way. It is
talking about isosurfaces.


>> 2) #version does not set correct value of noise_generator in order to
>> recreate images from source code created with previous versions of
>> povray (if I am to believe what I hear here).
> 
> Not a bug.  It works exactly as documented.

So the documentation matches the behaviour. I still perceive it as a bug.
 
>> 3) povray 3.5 does not recreate image correctly from my source code
>> generated for previous version of povray (3.0, 3.1-compatible
>> megapov0.5) even with global_settings { noise_generator 1 }, optionally
>> also with #version 3.0 or #version 3.1.
> 
> Not a bug.  The #version directive sets the language version, not the
> scene rendering style.  this is pointed out in "6.2.5 The #version
> Directive" as well.

See above.

Do you mean the 6.2.5 that starts out "As POV-Ray has evolved from 
version 1.0 through 3.5 we have made every effort to maintain some amount
of backwards compatibility with earlier versions."

 
>> 'noise and pigment functions' in the TOC takes me to
>>
>>     3.6.3.6  noise and pigment functions
> 
> Well, if you are looking in the completely wrong place.  This is a
> subsection of "3.6.3 Isosurface Object".  Surely not what you are
> looking for.  And the TOC makes quite clear to which section a
> subsection belongs...

Thanks that is a good point. And yet the title of the subsection is 'noise
and pigment functions'.
 
>> So I am still in the dark of
> 
> Hardly a surprise if you seek information in sections of the
> documentation that are unrelated to textures at all...

Could you please provide a pointer to the section of the documentation
which explains this?

>> whether the 'noise generator' parameter is theoretically supposed to
>> fix the problem. But I can tell you it does not in practice.
> 
> If you don't know how to use it, you should ask here.  The old noise
> generator does work exactly as before.  Thousands of users have
> successfully used the old noise generator, so blaming POV-Ray for you
> not knowing how to use it without having read (not randomly searched)
> the manual, well...

Did you ever look at my images or try the source I posted? You give no
indication that you did so.
 
>> And in my opinion, it should NOT be necessary. What is #version 3.0 or
>> #version 3.1 supposed to do, if not set values like this to the
>> necessary values to recreate a scene made using a previous version of
>> povray?
> 
> RTFM.
> 
>     Thorsten

You know where to put the manual.

Thanks in advance,

Simeon

Post a reply to this message