POV-Ray : Newsgroups : povray.binaries.images : Problem Patch Server Time
13 Aug 2024 05:50:52 EDT (-0400)
  Problem Patch (Message 1 to 5 of 5)  
From: Tim McMurdo
Subject: Problem Patch
Date: 14 May 2003 20:52:59
Message: <3ec2e4eb@news.povray.org>
Here is my problem:

Each of the sails is made from a single patch. the texture is a simple plain
white pigment. So why are parts of some sails missing? I have not changed
anything in the model at all. I did place the ship in Gilles Tran's
MakeCloud2 Sea scene to test his water formula ( Sea and Sky Sphere only)&
that is when the problem appeared. Now, even with all of his scene removed,
the missing parts of the sails remain missing. What could force only part of
a single patch disapear even after the scene elements were removed?

If I place the model in a totally new file, the sails return to normal. I am
completely stumped.

Tim



As a side note. I have been trying to model deep ocean waves with their
faceted surfaces for some time and his formula finally shed light on the
solution. Thank you Gilles.


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From: St 
Subject: Re: Problem Patch
Date: 15 May 2003 02:11:59
Message: <3ec32faf@news.povray.org>
"Tim McMurdo" <tmc### [at] prodigynet> wrote in message
news:3ec2e4eb@news.povray.org...

   Hi Tim, it looks to me as though you've scaled them down too much.

  Try scaling 'everything' up.

   ~Steve~



> Tim


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From: Tim McMurdo
Subject: Re: Problem Patch
Date: 15 May 2003 18:16:58
Message: <3ec411da$1@news.povray.org>
Scaling! You nailed the problem. Increasing the size of the object
eliminates the problem.

Thanks Steve,

Tim


"St." <dot### [at] dotcom> wrote in message news:3ec32faf@news.povray.org...
>
> "Tim McMurdo" <tmc### [at] prodigynet> wrote in message
> news:3ec2e4eb@news.povray.org...
>
>    Hi Tim, it looks to me as though you've scaled them down too much.
>
>   Try scaling 'everything' up.
>
>    ~Steve~
>
>
>
> > Tim
>


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From: St 
Subject: Re: Problem Patch
Date: 15 May 2003 21:45:58
Message: <3ec442d6@news.povray.org>
"Tim McMurdo" <tmc### [at] prodigynet> wrote in message
news:3ec411da$1@news.povray.org...

> Scaling! You nailed the problem. Increasing the size of the object
> eliminates the problem.
>
> Thanks Steve,

   My pleasure Tim. Nice to help someone else out for a change. Looks
like a great ship, I can see a lot of work has gone into your project.
Keep us updated with it.  :)

   ~Steve~


>
> Tim


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From: gk
Subject: Re: Problem Patch
Date: 16 May 2003 02:09:39
Message: <3ec480a3@news.povray.org>
Tim McMurdo wrote:
> Here is my problem:
> 
> Each of the sails is made from a single patch. the texture is a simple plain
> white pigment. So why are parts of some sails missing? I have not changed
> anything in the model at all. I did place the ship in Gilles Tran's
> MakeCloud2 Sea scene to test his water formula ( Sea and Sky Sphere only)&
> that is when the problem appeared. Now, even with all of his scene removed,
> the missing parts of the sails remain missing. What could force only part of
> a single patch disapear even after the scene elements were removed?
> 
> If I place the model in a totally new file, the sails return to normal. I am
> completely stumped.

This is known bug with bicubic patches.
Use patched version, e.g. mlpov:
http://pov.monde.free.fr/mael/mlpov081eng.html

Gleb


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