ANGLE BETWEEN VECTORS, 179,999999 INSTEAD OF 180'

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Permalink Reply by David Rutten on October 9, 2012 at 1:54pm

It almost is 180 degrees, the difference is minimal. When floating point numbers are used in mathematical operations such as multiplication or subtraction or what have you the trailing digits lose accuracy. This is an inevitable side-effect of using fixed-size floating point numerics.

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Mateusz Zwierzycki on October 9, 2012 at 2:16pm

Will reducing angular precision in rhino help ?

Permalink Reply by stefano vafiadis on October 9, 2012 at 5:36pm

Thanks a lot David & Mateusz,

Your help had been very precious!

I putted the output of the angle component in an 'integer primitive' and finally i had the correct values... 

Permalink Reply by Arend on October 29, 2012 at 5:13pm

The long explanation of what David is saying can be found here:

http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html

Permalink Reply by stefano vafiadis on October 31, 2012 at 3:38am

Thanks a lot Arend, i red only the beginning to be honest because i'm quite busy at the moment but it looks very interesting!

I would never say in my life as an architect to study something like that, but that's how it goes!