Grasshopper

algorithmic modeling for Rhino

How to check lines for parallelism?

Hi! I try to check two lines whether they parallel or not. The first idea that comes into my head was check their intersection, but as you can see there when the lines slightly not parallels each other, there is two different point of intersection. Maybe i can use the fact that the points are different as the added condition, but how predictable this way is? Or maybe do you know better idea?

And by the way maybe they are parallel, i don't know because as figure out they have different length.

bug2.gh

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Replies to This Discussion

Permalink Reply by popi papa on December 13, 2017 at 9:57am

Hello, 

I was wondering how could you find parallel lines from different lists. So for example in one list there are 30 lines and on the other 60. I am trying to find the identical lines of one list to an other so the parallel methode could give a solution. 

Kind regards, 

Popi

Permalink Reply by Dmitrii Karpovich on December 14, 2017 at 1:02am

As found out the best way to check lines for parallelism is to use vector Cross Product it returns 0 when the vector or lines are parallel.

TT Toolbox has Remove Duplicate line component which could be useful for testing identical lines.

Permalink Reply by phillip on December 14, 2017 at 2:23am

Hi,

once I made this for planes, but it also takes lines.

Best,

Phillip

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