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In article <38f99d00@news.povray.org>, "Bob Hughes"
<per### [at] aol com?subject=PoV-News:> wrote:
> I've skipped using the 'hf_height_at' keyword so far but I might give
> that a try in this animation later.
I personally prefer to use trace(), since it works on any object. If you
decide later to have a flat area on the landscape using CSG or to use an
isosurface as the landscape, trace() will still work, but hf_height_at
won't...
Also, you can get the surface normal with trace(), which can be useful
for some things.
--
Christopher James Huff - Personal e-mail: chr### [at] yahoo com
TAG(Technical Assistance Group) e-mail: chr### [at] tag povray org
Personal Web page: http://chrishuff.dhs.org/
TAG Web page: http://tag.povray.org/
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