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On Wed, 6 Mar 2002 12:45:09 -0600, "Shay" <sah### [at] simcoparts com> wrote:
> > #local triangle_area_engine=function{(x+y+z)*(y+z-x)*(x+y-z)*(x+z-y)/16}
> > #local triangle_area=
> > function(x1,y1,z1,x2,y2,z2,x3,y3,z3)
> > {sqrt(triangle_area_engine(
> > f_r(x2-x1,y2-y1,z2-z1),
> > f_r(x3-x2,y3-y2,z3-z2),
> > f_r(x3-x1,y3-y1,z3-z1)
> > ))};
>
> #include "functions.inc"
> #local triangle_area_engine=function{(x+y+z)*(y+z-x)*(x+y-z)*(x+z-y)/16}
> #local Triangle_Area = triangle_area_engine(Side_1_Length, Side_2_Length,
Side_3_Length);
>
> Seems right to me, but I might be missing something.
You forgot about sqrt applied but since others mentioned that not normalized
cross product is sufficient then I think my method is wasting of pov-time ;-)
ABX
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