Chris Huff wrote in message ...
>I have done something similar to this...I made a particle with mass and
>affected by gravity and used multiple calls to trace() to make the
>height field repel it. The particles kind of hover and bounce around the
>height field until they find a low area with no slope or go over the
>edge. To make the height field repel the particles, I simply used a
>bunch of trace() calls pointed from the particles current position in
>random directions.


Now, with the proximity pattern, this can be done automatically with the
eval_pattern() function.  Should make writing such things much easier.

Mark

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