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Technical Discussion » Accessing POP collision data in copy stamp expressions
- AndyW
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Technical Discussion » Accessing POP collision data in copy stamp expressions
- AndyW
- 337 posts
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I haven't fully wrapped by head around the way variables are passed in a SOP network, I'm having trouble accessing POP collision data for use in a copy stamp expression. I'm trying to switch geometry at collision with the hitnum attribute. Any tips?
Technical Discussion » Rest position in pointvop
- AndyW
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Thanks for the response, it turned out to be an issue with the scatter sop randomly changing point order, I was able to fix it generating points in texture space instead of by density
Technical Discussion » Rest position in pointvop
- AndyW
- 337 posts
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I'm applying turbnoise to deforming points in a pointvop, even though I've set the rest position upstream I'm still getting swimming. Is this something I need to explicitly sets in the pointvop? Thanks!
Technical Discussion » Pyro smoke forming into defined shapes
- AndyW
- 337 posts
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I'm getting better results now with the Fluid Attract Tools once I spent some time building better SDFs from my target geometry. Like so many things in Houdini, it's all about the SDF.
Technical Discussion » Pyro smoke forming into defined shapes
- AndyW
- 337 posts
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I've tried it but didn't get very directable results, I'll have to give it another look
Technical Discussion » Pyro smoke forming into defined shapes
- AndyW
- 337 posts
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I'm curious about any tips or techniques folks have used to setup Pyro to attract and follow geometry, like a character forming out of smoke. I've run some particle sims that I'm using to create velocity fields to move the smoke around, which seems to get me halfway there. Any advice is greatly appreciated
Technical Discussion » turning displaced geometry into closed volumes
- AndyW
- 337 posts
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Great tips, both those methods work. I ended up deleting prims with the inverse of the map I'm using to displace points, which gave me caps fitting the base of the landscape, from there VDB tools worked great
Technical Discussion » turning displaced geometry into closed volumes
- AndyW
- 337 posts
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I've displaced points on a grid to build landscape shapes, I'd like to make them closed volumes for VDB purposes, any tips?
Technical Discussion » fake collisions on copied geometry
- AndyW
- 337 posts
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Any tips on faking collisions on geometry copied to particles? Nothing fancy really, just to keep geometry from interpenetrating
Technical Discussion » Houdini on new Mac Pro
- AndyW
- 337 posts
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Technical Discussion » Houdini on new Mac Pro
- AndyW
- 337 posts
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Is anyone running Houdini on the new Mac Pro machines? I'm curious to hear folk's opinions, system configs etc. How well does Houdini make use of multicore systems, in other words how much am I gaining by going with 8 or 12 core system over 6 core?
Technical Discussion » particle dynamic state
- AndyW
- 337 posts
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Technical Discussion » Star Sphere Star Color?
- AndyW
- 337 posts
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You could project UVs on your points and use the Attribute From Map sop, export attribute to Cd. In this way you can paint your own image of the range of colors you want to use. As for linking color to star size, I would go about that with Copy Stamp expressions.
Technical Discussion » particle dynamic state
- AndyW
- 337 posts
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Excuse the Maya terminology, I'm curious how folks are going about animating inclusion/exclusion of particles to forces. With RBD I can group points and attach an “active” variable, I'm finding this doesn't seem to work in a popnet
Technical Discussion » Crown Splash
- AndyW
- 337 posts
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Technical Discussion » Point normals in U or V direction of NURBS
- AndyW
- 337 posts
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I'd like to first of all get normals pointed in the u or v direction of a nurbs patch I've imported from Maya, then transfer N to scattered points so that copied geometry faces along the uv direction. I've done this on curves with a sort and point sop, I'm curious how folks go about this with surfaces
Thanks!
Thanks!
Technical Discussion » Expression help - RBD impact locations
- AndyW
- 337 posts
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Hi folx, I'd like to get the impact location of some rbd with an expression that drops a point at the velocity change, based on a threshold I guess. Any advice?
Technical Discussion » Houdini Engine to run simulations
- AndyW
- 337 posts
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Am I correct is saying Engine has replaced hbatch, and I can set up multiple Engine licenses on our farm to run simulations? We're looking to set up 2-3 HoudiniFx licenses, I would rather not tie those up with sims. We could set up Hqueue to manage sims, but we'd rather use our current render queue manager Rush.
Any info is greatly appreciated.
Any info is greatly appreciated.
Technical Discussion » transforms from alembic cache
- AndyW
- 337 posts
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Any tips on getting transforms from alembic files? Specifically I need to attach collision geometry to incoming alembic caches generated in Maya
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