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In the meantime of Happy Feet production I wrote my first DSO for Mantra, It’s my first tool written in HDK. The idea is very simple: Load geometry at render time and modify it by CVEX code. This version is a raw version, probably it has a lot of bugs, but I will try to make it better!

How to install ?
otl file goes to ${HOME}/houdiniX.X/otls/
so file goes to ${HOME}/houdiniX.X/dso/mantra/
VRAYprocedural goes to ${HOME}/houdiniX.X
That’s all!

What does it add to Houdini?
First thing is procedural shader called: Delayed Load CVEX. It’s available in the SHOP context.
Second thing is Delayed Load CVEX Global VOP node. It gives you an access to predefined global variables.

Special Global Variables:
We have two special variables: geometry and proceduralid. Geometry variable gives a string, which is a path to geometry leaded by delayed load. It’s a shortcut, we don’t have to create parameter node with expression between delayed load and CVEX shader. Proceduralid variable gives you an access to Procedural ID parameter on delayed load shader. But what is it for ? It can be useful when you would like to modify the same geometry with the same CVEX shader but with a different seed.

Google Code

Have a good fun!
Cheers,
Piotr

Yeah I did some Fourier Series in CHOPs, only for fun, how to play with integrals in chops.
I used this law to draw every harmonic function:

here are results:

Graph was mess, I know I should build it with for loop.


I am thinking to apply fourier series formula to geometry, idk what will happen, but it’s interesting.

I used this paper:

http://webpages.dcu.ie/~applebyj/ms224/BT2_FSER.pdf

Cheers,
Peter

Hey folks!
Yeah I did something awesome! I found some computer tomography(CT) images and I tried to visualize CT data in Houdini, here are amazing results:
First step is to find some CT data, this page:

http://digimorph.org/

it’s AWESOME for that, you can find there whatever you want

Here is my CT image sequence:

and here is data in Houdini:
one slice:

density:

and iso surface:

Other data, human body:

it’s for NON-COMMERCIAL purposes.
cheers,
Peter

Hey folks I have started adventure with Wolfram Mathematica. Amazing program for mathematical calculation and great tool for equations visualization.
I started from Snell’s Law, to learn expression language etc.

Amazing tool for everyone who love do something with math at everyday.
Cheers

You can find me on first photo near left edge, blurred ghost

I was inspired by my friend from work. He did interesting ray tracing renderer inside SOPs. I decided to do the same thing, only to test myself.
There is no illuminance loop and it works only with one light, certainly, for loop will solve multiple light problem.
Cheers

First and second derivative computed in CHOPs, Lagrangian method.