1. Re: 3D distance
Hi,
>-- original function
>function perspective (sequence thing, sequence eye)
> sequence t, i
> atom r
> r =3D thing [Z] / (thing [Z] - eye [Z]) -- Notice this line****
> t=3Dthing[X..Y] i=3Deye[X..Y]
> return (t + r * (i - t))
>end function
I don't know what this function is for (it looks like 3D point =
perspective projection to 2D point but it ain't) but if you think r is a =
distance I give you the formula (don't you remember Pythagoras?):
d =3D sqrt( sqr(dx) + sqr(dy) + sqr(dz) )
and in Euphoria:
function distance3D( sequence p1, sequence p2 )
sequence d
d =3D p1 - p2
d =3D d*d
return sqrt(d[X]+d[Y]+d[Z])
end function
(I didn't test it)
Tom
