"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:39463B99.C3A9334B@gmx.de...
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| Just did a small macro for "hf_normal_at" (similar to hf_height_at)
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| I do not know, if someone has done this before, if anybody is interested
| in the code, let me know.

That's good and all but the obvious question would be "Why?" since 'trace()'
already does this.
Even so, I had thought before that the normal vector would be a great addition
to 'hf_height_at' anyway.  Most of all though I'm curious as to how you
managed to do this with a macro (because I am always curious).

Bob

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