On Tue, 1 Jun 1999 09:42:08 -0400, Robert J Becraft wrote:
>I just want a function to tell me the height at a particular coordinate of a
>heightfield.  That way I can programatically place objects at the surface of
>the heightfield instead of having to place objects by hand with
>trial-and-error or externally with a program.

You might look at the trace() function in the superpatch.  It was
designed to do this and more.  Unfortunately, the superpatch is
offline at the moment, but it will go back online within the next
day or so; watch for an announcement.

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