can attractors make influence on the opposite direction?

Dear all,

I make a surface that becomes doubled curved when I place some attractor points.
I have some points on top and some others on the bottom.
I want to have the opposite influence on the top and on the bottom,
I mean, I want the top to have an influence on positive y direction,
but the bottom negative y direction.
I know this is posible if you place f(x) component and for x to put 1/(x).
I'm doing this for the bottom attractors, but it gives an error...

Does somebody know why?
Attached I have the gh file that I'm working on.

thanks for your help in advance :)
maria

Attachments:

attractors-opposite.ghx, 482 KB

Replies to This Discussion

Permalink Reply by jameslucas on June 22, 2009 at 11:42am

I see that you have some instances of 0 going into the component you have labeled, which in turn asks Grasshopper to divide by 0, which it cannot do. I'm not entirely sure if I understand the objective, but perhaps you want a -x instead of a 1/x?

Permalink Reply by Maria Vas on June 22, 2009 at 11:55am

Hi JL,
thanks for your reply,
what do you mean I have instances of 0?
Can you be more specific?

Permalink Reply by jameslucas on June 22, 2009 at 12:52pm

Maria, I'm not sure if the sliders are in their original positions, so you may find slighly different values, but as I have them now, item 20 in the list being generated by the minimum component and being used your x input is the number 0, so including (1/x) in your equation would end up being (1/0) for at least that one instance.

I hope this clarifies my point, even if it doesn't offer a whole lot of direction for improvment.