Matt Estela

mestela

About Me

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Matt Estela is currently VR Supervisor at Animal Logic. Previously at Animal he's been a Lighting Lead, Fx Lead, CG Supervisor, and is one of those annoying Houdini evangelists you don't want to sit next to on the bus.

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My Talks

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“Non-VFX” VFX | Matt Estela

My Tutorials

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CG Wiki | Maya to Houdini
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CG Wiki | Quick Tips
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CG Wiki | Houdini Long-Form Tutorials
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CG Wiki | Dynamics

Recent Forum Posts

Simple procedural sand storm ! HIP shared July 18, 2018, 12:02 a.m.

Nice one, thanks!

sprite rotation vs particle projection on surface July 6, 2018, 5:13 p.m.

Correct. Probably not needed as the axis force pushes the ants away from the centre anyway.

sprite rotation vs particle projection on surface July 5, 2018, 9:32 a.m.

I've only dabbled with the crowd nodes, but I was able to get a simple setup along the lines you described.

An agent terrain projection is meant to stick crowd characters or particles to a surface, works fairly well.

For orienting the cards that'll have the ant pic, you want 2 vectors, the normal of the surface they're walking on, and the direction they're facing. The terrain projection node provides the first, and the built in @v (velocity) provides the second. Copying the first vector to @N gives the copy to points sop what it needs to fix the cards.

The other things in the setup are nice-to-haves; I tried to make slightly more interesting motion of the particles with a few forces. An axis force pushes the ants away from the start point, a wind adds noise, and 2 interact forces do opposite things; one is a wide soft force to make the ants try and follow each other (sort of), and the other pushes them apart if they get too close.