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Everything posted by kleer001

  1. Try to attributeTransfer SOP your normals from the polyframe to the curves coming from your foreach. Also you'll want to remember copying to points with Normals puts the copied object aligned there with its Z-axis. BrickWall_suggestions.hipnc
  2. Earthquake in Paris

    OH wow, there's a lot going on in there. Great looking! The people on top of the monument are GREAT! I wish the cars were moving and birds were flying and there were people running around the cars. The destruction doesn't look motivated to me, like, where's the shaking? I wanna see shaking.
  3. Clustering wood fractures

    Please post hip files for maximum helps.
  4. Clustering wood fractures

    You splinters look waaaaaaaaay too long.
  5. DPX image format?

    Is there any way to get Houdini to recognize and be able to use DPX image files? It's a pretty old format. I was surprised to learn recently that Houdini doesn't know about it.
  6. This is what you want:
  7. Houdini 18 Wishlist

    From my meager understanding of computer science this is an impossible feat. As in there's no function that can predict when another function will finish. And knowing when a process or subprocess will complete is necessary to know to successfully halt it. I figure getting instant stopping would require an additional hook on every function in the software that waited for additional user input which would then slow everything down. Also a progress bar would require Houdini to know how long a function took, but how would it know without doing it first? https://en.wikipedia.org/wiki/Halting_problem
  8. Bounce trees with explosion

    Depends on the state of the geometry I got. First I'd use a low rez proxy of the tree for timing, just animating it up and down, and get approval on that. Then I'd do some R&D into mid rez trees with a vellum cage as the shading gets hammered out in the texture/surfacing department. Then I'd so some R&D into getting the leaves to jiggle believably, probably copy stamps or instances, either with the rotations being the main thing. Then I'd probably be moved over to another shot and forget about it for a while. Then it'd come back with new animation and I'd need to update everything. Then I'll get final approval on the shading then go forward with final sims, probably do two or three master trees in high rez and copy them around with rotation and timing offset. TL;DR : Vellum.
  9. Are you changing point counts in a single ABC sequence? Are you using individual files for the ABC files? Have you tried to duplicate the bug with a minimal scene setup?
  10. Render specific frames

    Playblast or Mantra? What have you tried that didn't work? https://www.sidefx.com/docs/houdini/nodes/out/ifd
  11. Spotlight instancing on deforming geo

    I found the key is to add your instanc SOP of your lights to your Force Objects list in Mantra. It won't show up in your light lists because it's not a light. But it will cast light even though it's a normal object.
  12. Softbody, FEM or Vellum?

    Vellum totally screams, so I'd use that. I'm not sure what you mean by cells and pores, so I can't help you there. You might want to attach your softbody to an anchor then animate your anchor through your pore. If it's something like a huge jello through a small window.
  13. How would you render the furthest ray hit surface? I'm not even sure where to start. Well, that's not entirely true. I have an altered shader using IsFrontFace to "turn off" the camera facing polygon. The problem is that this only gives me the next surface behind the first. Which is great if one is rendering a simple convex shape. But for a more complicated concave shape, like a wildly rippling blob of liquid, this isn't very usefull for comp. notBackHelp.hip
  14. I have a bit of experience with flames. What you want to control for the shape are a few things: Source of your fuel, how much density is coming out and how fast. Disconnect this resolution from your pyro shape so you have less trouble changing up the pyro resolution. Simulation: Cooling Rate / Temperature Diffusion, closer to 1 and 0 respectivly for tighter control in the Shape tab... Combustion: Gas Released, as low as possible. This is more for explosions, but it can give you some ooomph. Burn Rate / Fuel Inefficiency, closer to 1 and 0 respectivly for quicker flames. Shape: Disturbance, control tightly with temperature. You'll want to preview this. And overall: Test, test, test. Pyro is difficult. Work rough to fine, coarse to high resolution. And only on as few frames as possible for look.
  15. Have you got it installed and working and what jumped right out at you and is your instant best-friend? Not "What looks cool?" to try out, those can sometime fall by the wayside. But what actually attaches its self to the way you work? Or maybe it's too early to say.
  16. Mouse causing hand wrist pain

    In additional to all the other good advice here I'll throw in my two cents. I use (since 20 years), and think you'll find useful, a stretching and strength training regimen. Yoga once a day, doing machines at the gym once a week. IMHO this pain is basically atrophy. Aging before, way before our time.
  17. Gravity activation based on an expression.

    I would: ($F<31)||($F>179) Each side of the logical OR evaluates to "1" when they're true. Boolians are your friends! To save a couple clicks? To practice expressions? For fun? But yes, keyframes are the quickest and easiest way to animate in general.
  18. Muscles, and how to get them...

    How are you bringing in your mesh animation? Is the topogy changing? Are you creating Locators for each bone's ends? That'll get you muscle anchors which you can offset from them for more defined muscle attachment. Here's a dead simple example attached. (just follow the muscle displace shelf instructions) muscleTest.hip
  19. Step like artifact in Volume

    My first impressions of things to look at (most will be wrong): Velocity vectors? Is motion blur on? Is there a vel volume? Shadows? Are they bitmapped steppings? (no way, lol) Try other types of lights? Is the smoke volume too coarse? Test a super coarse version for tests. (more testing than tests) Could there be more volume filtering? Would loose some definition. Bad filter type? Box, triangle, gauss? Something might stick, good luck.
  20. Muscles, and how to get them...

    Have you taken a peep at this? https://www.sidefx.com/tutorials/houdini-16-masterclass-muscles-overview/
  21. How to project a grid onto another model

    Please provide a hip file, gif, jpg, or something else to show what you've done so far and what you're trying to do.
  22. Understanding Solver SOP

    Because you're adding to their position by the Current Time (which always increases 1,2,3,4,5,6), not a time step (which is small and constant 1/24). So, change @Time to @TimeInc and you should get predicable results.
  23. Without benefit of sims I would animate the box by hand first. I'd set some goal scatter points on the bottom of the box with matching start scatter points on the ground under it, draw lines between them and resample them. Then distort the lines with noise, probably offset a bit for each line so they don't look too much the same. I'd probably need control along the line and distance from ground and from the box. Maybe offset the noise animation speed by each line too? There's some wiggle room for faking it, but a sim will be more intuitive, faster, and better looking.
  24. I've done this before, printing things from Houdini. It's a pain. Maybe try a high resolution VDB from polygons and then back into polygons. Or you can use a cleaner process than polygonal boolianing. Try working in VDBs, using the VDB combine Operation of SDF Union/Intersection/Difference and only outputting polygons when you're done. Working in VDBs will garuntee that you're nominally water tight, most of the time. But the geometry won't be as clean as it can be. In the end what you really want to do is build your geometry 'correctly' from the start or retopologize once you have a shape you like (which is a whole nuther discipline).
  25. Generating Tile Geometry

    It'll create a voronoi moasic shader for you. It's a 2D effect so you'll need good UVs. But no, it's not a dart throwing technique for 3D geo.