geneome » Dynamics

Using dophassubdata To Change Colors Dynamically

Eugene — Wed, 25 Jun 2008 02:49:28 +0000

It’s a fairly straight forward but I thought it needed to be put in video form. Dynamics and expressions in Houdini go hand in hand and this is an example of that. You can find the video tutorial on how to do this here and the result below:

Dynamic Color Changing from Geneome on Vimeo.

Houdini Gas Solver Tutorial Is Awesome

Eugene — Mon, 26 May 2008 17:52:25 +0000

I have a ton of video tutorial material on my machine that covers all sorts of stuff in Houdini, but I must say that the gas solver series is may favorite. I knew it would be great, because when someone says, “Hey, want to know how to create a gas solver that shows how to create volumetric vector fields from implicit surfaces from scratch?” I’m sure all of us would want to be the first one in line… well, maybe just a few of us. This series really opened up dops for me because I saw many implications of what was being shown that could be used for so many other tasks like the utilization of vector and scalar fields.

Of course, it might just be me finally coming into my own with Houdini because I have made a pretty serious study of it. I’m still not quite where I’d like to be with the rigging and shading systems, but I’m getting there. I’m still in awe of the infinite possibilities that Houdini has and I see more and more how it is ideally suited to be at the center of any 3D production environment.

In other news, Side FX posted Houdini 9.1.244 which has a big fix that I have been waiting for which dealt with accessing the help files quicker (it was an IPv4 vs. IPv6 issue if I recall), so if you are using Houdini and haven’t downloaded it yet (yes, Apprentice users can get it as well), it’s worth getting.

Here are the gas solver results directly from the tutorial and a tweak I did with the particles following a curve. The stringy these are the vector fields, the plane is a scalar pressure field, and the box points are being manipulated by both of those:

Custom Gas Solver Result from Geneome on Vimeo.

Custom Gas Solver With Curvation from Geneome on Vimeo.

Constraining Cloth Addendum

Eugene — Tue, 20 May 2008 00:56:09 +0000

I was so caught up with showing how you can get your grouped points output to a group node I didn’t show the easier way to stitch cloth with the stitch constraint (and an issue that may arise). So instead of calling do-overs and doing the whole video again just to add that, I’ll just do a 2 minute supplement to the video which you can find here.

Constraining Cloth

Eugene — Tue, 13 May 2008 03:53:17 +0000

After seeing the videos that Sidefx puts out (1, 2), I am obviously left with the thought that I’m no where close to the level of “real” Houdini users. But I still trudge along learning what I can when I can, and sharing it here with everyone. Behold then my super beginner video on constraining cloth to a bar… using two different methods!

Here’s an example of the second method using the flipbook:

Cloth Contrained On Edge from Geneome on Vimeo.

Cloth Intro And Exporting Simulations

Eugene — Sun, 04 May 2008 02:31:32 +0000

Boy did I wrestle with Houdini’s cloth a while before I had the nerve to do a video about it. I mis-spoke about the tristrip being able to break up geometry (it doesn’t), but I think it’s pretty solid as far as what I’ve discovered on my own and what I read in the help files (especially when it came to the guide geometry). The video is pretty big which I’m not too comfortable with, but I was on a roll and my desire to split these two topics into two videos went right out the window when the two topics blended together. Given my desire to not tick off my web host by sucking bandwidth I think I might remove a few older Blender videos to start making way for Houdini ones. You can find it here.