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Found 5 results

  1. RBD Jittering Velocities

    Hey guys, I've got this simulation of a wall where a train is wrecking through a wall. Some fragments hanging at the wall are still jittering afterwards. The jittering itself is no problem because it's minmal and the camera will be shaking. But the jittering velocities are a problem because they disturb our motion vector pass (generated through Maya Arnold) and cause it to flicker. Is there a way to leave the simulation as it is and "repair" the velocities? I tried a filter for the low velocity values, but they are not precise enough. I uploaded some Frames of the wall as bgeos: https://drive.google.com/open?id=1Re5YiuvD8KaTe56XRehdGMfcQmV9b8sA Thanks for the help!
  2. Hola, I'm working on a fracture sim driven by impacts from particles, and where I can get the points to activate the pieces it hits for simulation it does not transfer the velocities from those particles onto the pieces. I've tried 3 or 4 ways around it and I even got it to work(by overwriting the "v" attribute in the RBD PackedObject) but there are still problems, like that the velocities turn into a constant velocity and that they start to ignore gravity. Thanks in advance for your help. BaseFile_ProofofConcept.hipnc
  3. I'm trying to imitate the motion of rocks falling on dirt. Since the RBD Solver seems to give me more accurate and realistic looking results over the Bullet Solver, I decided to go with that method using RBD Fractured Object. When I first had my scene setup with Bullet, I was able to use a little VEX in the SOP Solve to artificially reduce velocities as rocks fell below a certain Y value. It seems like that setup isn't compatible with my RBD setup, so I was wondering what would I need to do to get it working? In addition, how can I write an expression that would tell the solver to reduce the velocities of the objects by half and double their weight each time they impact the ground? Any tips would be greatly appreciated. Thank you! RBDTest_001.hiplc
  4. Infinite FLIP Tank

    I have a scene where a cube goes down in a "infinte" viscoous FLIP tank. I am doing the sim on a small area, in order to avoid a huge tank. I am also keeping the velocities low on the edge. You can watch a flipbook here: https://dl.dropboxusercontent.com/u/97342856/sc06_v003_animatic.mov What do you recommend in order to extend the surface? I am aware about the FLIP tank-Ocean surface workflow but I dont think it will suite. Thank you in advance.
  5. Hi, I've got a scene with some particles inheriting their velocities from sops. I can't seem to get the particles to match positions with a duplicate set of points which have just been displaced along the sop velocities. What am I missing? (Please find my scene attached - created in Houdini 13.0.288) Cheers, Tony pops_velocities_test.hip
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