algorithmic modeling for Rhino

Vector mass addition

Hello,

We're newbies to vb.net. We have a list of vectors (with different directions) and what we want to have in the end is basically the mean vector (or the mass addition of the vectors), in order to be able to orient an object according to this.

Can you please help us out?

Thanks in advance

Replies to This Discussion

Permalink Reply by Damien Alomar on November 9, 2009 at 7:56am

The cool thing about the SDK is that they've overriden operators to be used on certain classes, mainly points and vectors. So adding vectors is pretty much as simple as you'd add two numbers.



Dim sumVec as New On3dVector()



For i as integer = 0 to myVectorList.Count - 1

sumVec += myVectorList(i)

Next

Permalink Reply by Tudor Cosmatu on November 9, 2009 at 8:50am

Thanks for the quick reply

The output in this case should be a vector right? but even so it doesn't show up... What did we do wrong?

Thanks again

Permalink Reply by Damien Alomar on November 9, 2009 at 9:16am

I don't think GH is registering the output correctly. Try a different name for the output, then assigning sum vector to that. So in the default case (with the output variable named A) just add the line

A = sumVec

to the code.

Permalink Reply by Tudor Cosmatu on November 9, 2009 at 9:21am

Thanks a lot!

It's strange cause i tried it earlier but something must have been wrong, cause now it s working.

McNeelPermalink Reply by David Rutten on November 10, 2009 at 4:12am

Incidentally, the next release of Grasshopper already has a Vector Mass Addition component build in.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Tudor Cosmatu on November 10, 2009 at 5:40am

Cool! When will it come out?

Permalink Reply by Vicente Soler on November 10, 2009 at 12:44pm

In the mean time you can decompose the vectors to their X,Y,Z values, use the mass addition component in each of the 3 lists of numbers and use the resulting 3 numbers to create the sum vector.

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