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ULYSSES: Sand as Medium

Two stones with radial lines

There are interactive situations where one first places stones on
the sand in the spirit of the stone gardens. The camera image of the
sand is first interpreted to find where the stones are. The original
line geometry is then altered to leave room for the stones and have
the ball slalom safely around them.


Contents copyright 1999 © The Mathematica Journal and Jean-Pierre Hébert