Checking for parallel vectors - something is wrong.

[ggaliens]

More often than not ... if I need two vectors to be perpendicular ... I used the e3d_vec:cross( ) in order to ensure that.

For example ... I have a single vector ... and I need any of its perpendiclar vectors (family of vectors) ... I can take


Vector A

compute any old random vector which is not equal to A .... call it B.

C = Then e3d_vec:cross(A,B)

C will be perfectly perpendicular to A by definaition. And then you could of course compute the third mutually perp B prime B2 using {A,C}



Not sure if this helps at all.

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If you believe MathcWorld ... then the ZERO VALUE for perpendiculars is correct.

So e3d_vec seems correct.