Pull points to surface

Hi.

I am wondering if anyone can figure out why my small definition does not work.

I am just trying to use the pullToSurf force component on a list of points along a curve, and I want to drag these towards a planar surface. But I get an error everytime I try to run the simulation.

I am using the points as input Geometry, but I have also tried to input the lines between the points - same error:

I hope that someone can help me.

Cheers Rasmus

Replies to This Discussion

Permalink Reply by Seb Andraos on November 22, 2012 at 2:52am

Not Entirely sure why you need to use kangaroo for this, maybe there are reasons i'm not aware of but could you not just use the basic grasshopper components something like this?

Permalink Reply by Rasmus Holst on November 22, 2012 at 3:02am

Hi Seb.

Yes you are absolutely right, I am doing the same at the moment, just with surfaceCP.

The thing is that I would like this pulling force to be a part of a bigger particle system. The curve along the points is a part of a gridshell system, with connections, bending resistance etc. But since I do not have a way of setting the "torsional" resistance in Kangaroo (as far as I know), the curves does not end up being planar. That was why I wanted to "fake" the torsional resistance with the pull to a planar surf force.

Permalink Reply by Seb Andraos on November 22, 2012 at 3:39am

Would you mind uploading you definition? I'll see if I can figure out what's wrong with your original def rather than cheating.

Do you have an example image of what you're trying to create? just to give a better idea of the target

Permalink Reply by Rasmus Holst on November 22, 2012 at 6:13am

Sure. It is a test of a CODABarcelonatech pavillion.

It starts from a planar grid and then the control points are moved closer together along some helplines. This creates a gridshell. I want to simulated the behavior of the shape if this was done with straight wood elements.

But I have not been able to figure out how to keep my elements "straight" or geodesic to the surface the elements create. In another way; simulation of the torsion resistance of the elements. This means the final elements from my definition is no longer straight.

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