Stephen Waelder wrote:
> 
> I want to define limits for object interaction. Instead of having one
> object pass into and through another, I want to have either the smaller
> object leave a hole in the larger, or for the two objects bounce off
> each other.
> 
> Concepts that I'm thinking of include animating wind blowing trees.
> Branches should not pass through each other, while loose leaves should
> not pass through the trees.

Unfortunately there is no general formula or algorithm for determining
if two objects intersect.  One fellow asked me about two months ago
how to determine if two boxes intersect; I'm still working on it.

Regards,
John

-- 
"What can I say?  Everyone likes flowers, even us evildoers." -- Zorak

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