[sdiy] Wave terrain synthesis (was Re: Generatingacyclicwaveforms?)

[David G. Dixon]

> Huh?
> 
> Why resurrect a 2 week old thread for something like this? You could
> have written me offline..

I concur.

By the way, my 15-year-old daughter is learning how to reflect shapes across
vertical and horizontal lines for Grade 9 Math, so I thought I'd "help" her
by showing her how to generalize the process for any line of reflection.  Of
course, I didn't really know how to do this, but I figured it would be easy
to figure it out using simple algebra.  Well, after 30 minutes of trying,
and then coming to the conclusion (probably mistaken) that I'd need
trigonometry to do it, I gave up.

Conclusion: the perfesser don't know no analytic geometry!  I never learned
1/2 as much analytic geometry as Ian Fritz has forgotten, or 1/4 as much as
cheater remembers...  Of course, I've never actually had to apply it, which
is probably why I never bothered to learn it.  And, I know that in the
unlikely event that I actually need it, I can read all about it in Chapter 1
of the CRC ("rubber") Handbook sitting over there on my bookshelf...