>>> universal formula for area of triangle:
>>> S=sqrt(p*(p-a)*(p-b)*(p-c))

>> Is that faster than using half the cross product of two of the sides?
>> Something like:
>> area = vlength(vcross(P1-P2,P3-P2))/2;

> Don't think so. sqrt needs more cpu cycles. But maybe I'm wrong!

Vlength uses sqrt internally. But the major slowdown is Povrays interpreter
and not the cpu.

Regards
Hugo

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