L-Systems - Instancing geometry on a "step forward" (F).

[Josh Eason]

Hello,

I was wondering if anyone knew if it was possible (or not) to instance geometry on a step forward (the F variable) using L-systems in the same way that leaves or flowers can be instanced for the variables J, K, L, and M.

Anyone have any ideas?

Thanks!

[Matt_K]

Hey Josh,

Just a rough idea - not able to test it right now, but what about grouping any points in the F, and then instance/copy stamp onto those points?

From the houdini help:

Create groups within L-systems

The g command puts all geometry currently being built into a group.

The group name is composed of a prefix set on the Funcs tab and a number. Default prefix is lsys, producing group names like “lsys1”. You can specify the number as an argument to the g command.

For example, g[F] puts geometry from the F into a group (named using ). Otherwise, the default index is incremented appropriately.

The current group is associated with the branch, so you can do things like gF [ gFF ] F to put the first and last F into group 0, and the middle (branched) FF into group 1.

To exclude a branch from its parent’s group, use g(-1).

Hope that helps,

Matt.

Edited July 10, 2011 by Matt_K

[Josh Eason]

Hey Josh,

Just a rough idea - not able to test it right now, but what about grouping any points in the F, and then instance/copy stamp onto those points?

From the houdini help:

Hope that helps,

Matt.

Hey thanks, I'll give it a try and will let you know.

[eetu]

I was wondering if anyone knew if it was possible (or not) to instance geometry on a step forward (the F variable) using L-systems in the same way that leaves or flowers can be instanced for the variables J, K, L, and M.

Why not just embed a J into the rule, in front of (or after) the F you want to instance to?

It doesn't move the turtle or interfere with the system in any way.

J/K/L/M do not have to be at the extremities of the system.