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Activity Forums Maxon Cinema 4D Xpresso Question | Link Data type as Nurb Input

  • Xpresso Question | Link Data type as Nurb Input

    Posted by Chris Smith on May 17, 2006 at 4:16 pm

    I’m making an object that simulate’s 3D stroke by Trapcode in C4D using the 9.6 Sweep Nurb.

    It’s complete, but right now the spline acting as the path is my own spline. In the spirit of having a complete object where the end user only needs to control the whole effect in the AM, I have a User Data Link type. So the user drops a spline into it which would become the stroke path.

    However when Xpresso nodes have an input that accepts a link it’s a clear cut thing. However a Sweep Nurb obviously functions by 2 objects being children of the Sweep itself. I tried setting up an empty Spline type and patching the link to it’s object input port, but nada. I’m basically trying to get a User Dropped spline to be the sweep path to a Sweep Nurb. When I drag the Sweep Nurb object into Xpresso, I don’t see a input that acts as one of it’s inputs. Does a Sweep Nurb ONLY work by making spline’s children of it on the OM? If so, how can I set up a dummy object that the link can connect to?

    Chris Smith

    Jcoursey replied 17 years, 11 months ago 2 Members · 2 Replies
  • 2 Replies
  • Chris Smith

    May 18, 2006 at 2:03 pm

    Solved. For the archive record:

    Use an instance object under the Nurb. Then in Xpresso attach the User Link box to the Reference Object input of the Instance Node.

    Chris Smith

  • Jcoursey

    July 12, 2006 at 5:07 am


    Thanks for posting this. Is there any way you can expand on how you are making this work. I’ve only been working with Cinema 4D for about a month now and am not experienced with expressions.

    I desperately would like to achieve the 3D stroke effect for my next project.

    If you by chance read this, if you can post more specific info on how to achieve this effect, I would truly appreciate it.

    Thanks in advance.


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