Jump to content

Directionally orient grid


Recommended Posts

Hello and welcome to this post.


In nature, we see a phenomenon called tropism (the way a leaf orients itself towards the sun). I need help building a rig that will simulate this effect. These are the objectives:

  1. Create a source object acting as the reference point for tropism
  2. Get the leaf to orient itself in relation to the source

Additional challenge:

It would be ideal to shade the front and back face of the leaf with a different texture. What is a neat VOP setup which would simulate this?

Here is a  basic HIP file to begin messing around with.



Edited by voxelfox
Fixed spelling and added image
Link to comment
Share on other sites

Maybe It Helps
And Consider Using L-stem For those Stuff they already have Build inside(vectors,directions) Tropism



Edited by Librarian
  • Like 1
Link to comment
Share on other sites

Hello all, 

Thank you for the responsive feedback.


Konstantin, I like your thinking. I'll take a look at implementing your techniques into the rig. You also present a good point for using the is front-face VOP. 

Tesan, This is a splendid collection of resources thanks for digging around. I have built a full L-System this setup is a mock to simulate the principle features.


Any other feedback is welcome, this post could be useful for someone in the future.

All the best,



Edited by voxelfox
Spelling and comment
  • Like 1
Link to comment
Share on other sites


Hello Matt,

This is a phenomenal piece of work that you have whipped together. I can see value in taking time to study the processess documented in your scene. Could you offer some advice for one who would be looking to learn quaternion based orientaions? Any tips such as:

  • resorces
  • study methods
  • application in a Houdini context

Thank you again for sharing your skills with others.


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...