Is it possible?

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  02 February 2013
Is it possible?

I'm wondering if it's possible to chop a polygon up in cross section NURBS curves?
I've made an image (using a texture) to illustrate what I want. Those rings should be NURBS curves.

I need the curves to aim a laser that will be "printing" the shape. I'm comfortable with the other parts of the concept.

Any ideas? Thanks!

 
  02 February 2013
are you looking to output this to a printer to construct? 123Dmake does exactly that:

http://www.123dapp.com/make

edit: Oh wait, I think you're looking to do it in animation. Sorry, I don't know how to do that but there might be a script on creativecrash to do it.
 
  02 February 2013
Hmmmm... I think I saw someone demonstrating an effect like this using invisible planes cutting through the character, representing the lines. He used only intersection lines from the Toon options (Toon creates dynamic updating lines, where the planes and the character intersect).
edit: I see, that you need NURBS Curves, dont know if you can convert the toonlines to NURBS...
 
  02 February 2013
You should just be able to use Edit Mesh--> Project Curve on mesh to accomplish this.

With the hand model facing upright, create a horizontal nurbs curve, duplicate the curve with Duplicate Special, creating the number of copies you need vertically, select the hand an all the curves, and then run Project Curve on mesh.

Hope that's what you were looking for.
 
  02 February 2013
Select edge loop Modify\Convert\Polygon Edges to Curve.
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  02 February 2013
Thanks for your excellent advice, people!

V_man: I'm going for the Project on Mesh-tool (I never noticed it before)
It's working just how I wished for.

Now, is it possible to connect all these Nurbs curves somehow? So that I could run a locator along all of them in a Motion path?
The idea is to make a beam that travels along the shape of the model, from base to fingertips.
 
  02 February 2013
Would you want the motion to be continuous, as if the curves were connected like a spiral around the hand? Or can the beam motion jump from one curve to the next?
 
  02 February 2013
Continuous if possible. But it depends on how hard it is to achieve. Jumpy is acceptable too.
 
  02 February 2013
V_man: Thanks for pointing me in the right direction.
I've solved this effect now. The key to success was a lofted surface (conical) with a blendshaped nurbs curve in the lower end. Apply an animated beam-like texture and the result is just what I wanted.
Cheers.
 
  02 February 2013
Excellent Gagn, good to see you've worked out a solution and glad I could help.
 
  02 February 2013
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