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Amit Mazumder

Guillaume Jobst CG blog: Tools. Houdini Tricks. After not having exercised for four months, I’m finally back at it again and I feel shredded!

Houdini Tricks

I like feeling lean and healthy. Makes me feel good and all tingly inside. Just like exercising, I like my machine to be lean when I’m rendering especially since I work on an old machine. I’m not like all you cool kids with the fancy Octane boxes. So I like to give my render all the resources possible to do its job. After Effects Command Line Render: aerender -project ~/Desktop/30-days/to/six-pack-abs.aep As you might have guessed, you can do the same in Houdini.

Environment Setup Command line rendering is not programming for those of you about to close the browser window or tab. Now, before we continue, I’m on OS X so that means I’m using the Terminal and I have my environment set up to initialize Houdini when I launch a Terminal session. If you’re on Windows, it may work similarly. Command Line Magic Lets say I have a .hip file called ripped.hip that has a Mantra node called mantra_out. Next Time. FX Thinking. I, Houdini. HoudiniGettingStarted - cgwiki. So you've decided to take a look at Houdini?

HoudiniGettingStarted - cgwiki

Good for you! If you're not sure, maybe skim the MayaToHoudini page, it might convince you. This site assumes you can navigate around Houdini and know the basics. If you don't, don't worry, the core UI is very simple, and shouldn't take more than an hour to learn. If that's you, then you probably want to do these steps first: Download Houdini Apprentice. Once you can move the viewport and get into a SOP network, you can start working through this site, I suggest in this order: Houdini - lots of quick examples HoudiniTutorials - conversational, borderline rambling tutorials. Useful Expressions - Ryoji CG Memo. Parameterscenter position ----------$CEX, $CEY, $CEZcentroid("..

Useful Expressions - Ryoji CG Memo

/node", 0) ------ 0-X 1-Y 2-Zgroup center ------------$GCX, $GCY, $GCZnumber of points -------$NPTnpoints(".. /node")number of primitive-----$NPRhow many primitive or point the group has ----$NGRPbounding box -----------$BBX, $BBY, $BBZbbox(".. Andy Nicholas » Resources. Home » Resources Resources This page is intended for anyone who is wanting to improve their basic maths and physics skills and doesn’t quite know where to start!

Andy Nicholas » Resources

Contents Suggested Reading List An incomplete list, but a good start. SCATTER. Deborah R. Fowler. Math for VSFX Posted 2013 Updated on Jan 12 2017 Visual Effects produces those things which cannot be real, but can be imagined and made to look real.

Deborah R. Fowler

A visual effects artist is a master of illusion and their toolbox must include math and science to support those effects. Collaboration (password only) This page consists of a growing collection of examples (mostly houdini) of useful mathematical properties used frequently in visual effects. Acos is your friend Binary/Hexidecimals Circle Circumference Circle Illusion Coordinate Systems (Polar versus Cartesian) Cross Product Dot Product (Two point constraints) (Pythagorean Theorem/Vector review as well) Dot Product Follow (Using the dot product and following a point) Fractals Gear Ratio L-systems Phyllotactic Pattern Phyllotactic Zoetrope Pythagorean Theorem at work (train) Seashells Shooting Ball Similar Triangles (better roof) Spinning Fun Velocity (tank game) Wave Illusion Weighted Grade Average.

Houdini. Today I will show 2 plugins I wrote to give me more control when it comes to deletes points.

Houdini

Many times, when you run when you run sims with collisions, you will have particles going through that object and continue to travel. In fig. the particle turns red when it doesn't collide properly and goes through the object. We can not just select those bad particles and delete them when they are inside or outside or collision object. In fig. 2 I delete my particle when it goes through. Unfortunately, we can see it disappear in front of the camera. Jarrod Hasenjager - Material Studies: Metals. Hello all, this is my first entry into what will be a series of studies on different materials, including but not limited to metals, plastics, paints, wood, refractive and SSS materials.

Jarrod Hasenjager - Material Studies: Metals

I will continue to add to each category as I finish more examples. I do not claim that these results are scientifically accurate in look, they are only the result of personal studies and observation done outside of work, to further my own knowledge and skill. It would be great if this could help somebody else too, so please like, share or comment if you find this helpful, and please feel free to hit me up with any suggestions or thoughts, should you have any. All shaders and renders are done in Houdini. Houdini // flipswitchingmonkey. Driving DOP sims with animated geometry converted to velocity fields can be a lot faster and offers more control than many other means of influencing sims.

Houdini // flipswitchingmonkey

In this tutorial I’ll quickly show how to generate your own Velocity Volume and feed it into a fluid sim. The rendered fluid sim I’m showing near the beginning can be seen here: As a follow up to my previous tutorial, here is a look at how to resample two curves in a way that keeps their shape and increases the point count to an equal number, so they blend together better.

Finally I have got around to recording a new tutorial. I’ll try and make this a more regular thing from now on (as in, more regular than once every year). Just like before for H13 and H14, I made a few custom icons to keep things organized on my desktop. As a follow up to my previous article on how to enable a specific CUDA device using environment variables, it turns out that this works for HIP file environment variables as well. Advanced CG Resources. Houdini Research & RnD. Abvfx – A blog by Andrew Browne.