[Sidefx-houdini-list] Reduce L-system to one primitive

Andrew D Lyons tstexture at gmail.com
Wed Sep 8 07:49:53 EDT 2010

Yep. Probably what you want to try is to create a custom attribute per
branch in your L-system rules. With each branch able to be isolated
via some kind of a partition into a group, you can loop over all the
groups and consolidate points, and possibly even fit a curve to the
branch using local interpolation mode (curves only). Convert back to
polygon after that.

Also, is it not possible to get the desired shapes from your rules?
That will provide the most organic results.


2010/9/8 François Duchesneau <sidefx at trinix.ca>:
> You cannot convert to nurbs a curve that has other curves coming out of
> it like branches. Maybe you can try using the PolyWire Sop followed by a
> Subdivide Sop.
> Or, after you have converted to nurbs, you can snap the root point of
> each branch to the nearest point on the curve using expressions. I'm not
> sure of these but have a look at "pointdist".
> François
> Pablo Giménez wrote:
>> Hi all.
>> Every  new branch in a L-system is a new primitive.
>> I want to convert my lsystems to NURBS to get a roundness look without
>> lots of points, the l-systems will be later rendered as hair.
>> Problem is that becasue it has several primitives when converting to
>> NURBS branch's origin point has an offset.
>> So I need to convert the whole lsystem to just one primitive a polygon
>> curve so I can later pass it to NURBS.
>> I have been trying with the JionSOP but no luck so far, seems is
>> designed to work with surfaces.
>> Any ideas???
>> Thanks
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Andrew D Lyons | Digital Artist | http://www.tstex.com

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