POV-Ray : Newsgroups : povray.general : Can you use the trace command on a heightfield? : Re: Can you use the trace command on a heightfield? Server Time
30 Jul 2024 06:28:51 EDT (-0400)
  Re: Can you use the trace command on a heightfield?  
From: Warp
Date: 12 Apr 2010 07:48:49
Message: <4bc308a1@news.povray.org>
Dre <and### [at] gmailcom> wrote:
> >  The normal is the *fourth* parameter. I was talking about the *third*
> > parameter, which is the direction. That should be <0, -1, 0>.
> >
> > -- 
> >                                                          - Warp

> What difference does it make if its -1 or -10, they are both in the same 
> plane.

  <X, -10, Z> is not the same thing as <0, -10, 0>.

> Or are you saying the 3rd parameters is a direction vector not a final end 
> point vector?

  It's a direction vector.

-- 
                                                          - Warp


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