POV-Ray: Newsgroups: povray.newusers: Trace and Normal

POV-Ray : Newsgroups : povray.newusers : Trace and Normal		Server Time 25 Dec 2024 13:29:00 EST (-0500)

From: Tim McMurdo
Subject: Trace and Normal
Date: 28 Sep 2002 10:21:54
Message: <3d95bb02$1@news.povray.org>

I am using the trace feature to place an object on top of a wave. I have
figured that part out fairly well.

However, I want to make the object rock back and forth on the wave by
aligning the object with the normal at the point it sits on the wave.

I know tat the trace function will find the normal for me, but I can't
figure out how to use that normal to rotate my object.

Can anybody show me some sample code that will do this for me?

Thanks,

Tim

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From: Christoph Hormann
Subject: Re: Trace and Normal
Date: 28 Sep 2002 10:34:21
Message: <3D95BDED.AEEE5BE9@gmx.de>

Tim McMurdo wrote:
> 
> [...]
> 
> I know tat the trace function will find the normal for me, but I can't
> figure out how to use that normal to rotate my object.
> 
> Can anybody show me some sample code that will do this for me?

You should try the 'Reorient_Trans()' macro in 'transforms.inc'.

Christoph

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