[Sidefx-houdini-list] Eigenvalue To Color Water

Lucio Flores dogboy_l at yahoo.com
Thu Oct 19 12:08:25 EDT 2006


Sounds like this is a way to assign an attribute to areas of high curvature.
Mean and Gaussian curvature are calculated using eigenvalues. 

--- Jaideep Khadilkar <iamjaideep80 at yahoo.com> wrote:

> Hi Everybody....
> 
> I got it. It was pretty simple. Didn't see the hidden attributes in the code.
> its "jminus" float attribute. Now I will play with it to get the look.
> 
> 
> 
> ------iamjaideep80
> Jaideep Khadilkar
> TD,Sciclone Motion Graphics
> 
> Jaideep Khadilkar <iamjaideep80 at yahoo.com> wrote: Hi Everybody....
> 
> With some expirements I figured out that there is a "Import Displacement
> Attrib" Op in Vops. I also tried it using a simple turb noise in disp,
> exporting the turb amount and importing that into shader to color the
> surface. And it worked fine.
> 
> Now I just want to know the name and type of the Attibute that has the
> eigenvalue information exported by Ocean Toolkit...
> I tried using "eigenvalue" as a float and vector but doesn't work.
> Does any boy know????
> 
> 
> ------iamjaideep80
> Jaideep Khadilkar
> TD,Sciclone Motion Graphics
> 
> 
> 
> Jaideep Khadilkar  wrote: Hello everybody....
> 
> I was experimenting with the Houdini Ocean Toolkit. 
> It is pretty good with the displacement. I wanted to make some good surface
> shader for the ocean which has got white foam floating .On Odwiki, it says,
> use eigenvalue to color the areas for the foam. I also saw that, the
> ocean_displace shader exports eigenvalues. But I don't know how to use it. 
> 
> Also I want to know how to export any attribute from displcement to surface
> shader.
> 
> ------iamjaideep80
> Jaideep Khadilkar
> TD,Sciclone Motion Graphics
> 
>    
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