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Found 379 results

  1. Houdini.School Velocity Forces

    I am happy to announce that https://www.houdini.school has launched and you can get 15% off now through July 27th, 2021. I'll be joining a host of talented Houdini teachers, like: Debra Isaac Kate Xagoraris Beck Selmes Christopher Rutledge Justin Dykhouse Jeffy Mathew Philip Nicholas Ralabate You can learn more about my Velocity Forces class here: https://bit.ly/houdinivelocityforces Teaser video for my Velocity Forces live class: https://vimeo.com/577928177
  2. Hello! This is my first time posting here. I am a graduate student currently working on a project that involves a character comprised of rigid objects that can assemble, disassemble, and rearrange itself. The parts can also blend between dynamic and keyframed states. I have a method for the state switching, but I cannot seem to find away to apply any attractive or guiding forces to the parts when they are in their dynamic state. I found a way to do this previously by using a POP Attract node, but it only worked with Rigid Body Solver. I'm not sure how to apply that same node to a RBD Solver. If any knows how to make that work or knows a better method, I'd appreciate it. The goal in this test is to make the ball roll towards the cube and fit into one of the sockets. I have attached a zip file with the assets and .hip file. Thanks in advanced! RBDTesting.zip
  3. Hi, I'm considering updating my local ethernet LAN to a 10 gig ethernet lan. Right now, I'm on an old 100Mbps LAN and it's too slow to playback simulation caches over the network. I've been seeing that people are using 10 gig networking at home now and are able to play back video, do video editing over the network with it. I'm wondering, if anyone is doing this, how is simulating to cache files, reading/writing cache files, on a 10 gig local network? Is it like working on a local machine?
  4. Gas Disturbance

    Hello, Following a tutorial about dynamic cloud simulation i get weird result applying Gas Disturbance operator since in houdini 18.5 have different parameter and totally different behaviour that what showed in the course (recorded in H17.5.258 ), any hint on how to set it so it behave like older version? In specific: Binding have not "Disturb field is vector field" option "Cutoff" parm in Disturb setting mode "Block based" have now a lot of new parameter realted to noise that doesn't exist in older version Control setting doesn't have "Control influence " parm Thnks!!
  5. Free video tutorial can be watched at any of these websites: Fendra Fx Vimeo Side Fx Project file can be purchased at Gumroad here: https://gumroad.com/davidtorno?sort=newest
  6. I`m currently working on high resolution of flip simulation but sometimes it`s crashing middle of the simulation and i think it`s memory problem(I`m doing something else while simulation) And i realize that .sim file is can save the simulation progress and i can start up with .sim file to resume the simulation. But during simulation saving whore simulation to save .sim is very waste of disk, saving time,, extra So what i want is after the simulation is done or houdini is crashed or user stopped the simulation, i want to save last of 1~2 frame to resume the simulation! Is there any way to do this?
  7. Digging Hole

    Hello Guys, it's possible to make in houdini simulation of digging hole in terrain surface? I mean my character have shovel and i wanna make simulation where shovel dig to the material and he takes piece of material on shovel. It's just a question i have a idea to make something like short film. And this is one of the scene. Like in Mafia 2 where Vito with Joe digging hole for dead body in his car. Thanks
  8. Hello Everyone, I am currently struggling with a personal project. I was trying to figure out metal deformations in Houdini using Bullet solver and constraint switching (switching back and forth between glue constraint and soft constraints). But I am not satisfied with the results of the simulation. Is there any way to blend custom animation to guide the entire object in a specific way while allowing for deformations to take place? A perfect example would be a car hitting an object and continuing along its path with deformations. I've tried a lot of techniques without any real success. So far the closest I was able to achieve was using a pop wrangle to get position data from a SOP path, calculating the difference using the current position in the simulation and the position from the SOP path and then adding it as velocity. It works somewhat like an active guide, but the simulation always lags behind the animation or the velocity keeps escalating out of control. Could really use some fresh ideas. Thank you in advance.
  9. Hello, Noob question here, I have a vellum plane being affected by a popwind force, I don't like the current look of the simulation, how would I change the 'seed' of it to change the results? Thanks!
  10. Free video tutorial can be watched at any of these websites: Fendra Fx Vimeo Side Fx Project file can be purchased at Gumroad here: https://gumroad.com/davidtorno?sort=newest
  11. Hello everyone. I have been using Houdini to Niagara on several projects for now and it works fine. However i started to want to time stretch / duplicate points and most importantly loop my sims. I do it with a couple of time remap nodes in Houdini. Of course it doesn't work within Niagara. (the sim ends in the middle, exactly where the "end" of the sim is and the second part is not showing up). I tried to alter a few attributes ( age, life ) with no success. I am wondering if there are intrinsic attributes that should be changed in order for this to work? thanks! looptoNiagara.hiplc
  12. [SOLVED] Tree Sim Deform

    Hey everyone, I'm trying to make a tree simulation. I'm using wire solver, but I can't figure out how to deform the tree geo with the simulated curves. I tried wire deform and point deform, but the result is strange. Do you have any idea? tree_deform.hiplc
  13. Sparse pyro distributed simulation

    Hi, I was wondering if there is a way to distributed sparse pyro simulation. You can easily distribute with legacy pyro by distributing the container by slicing. I mean yeah... there is a predefined container that gets sliced in legacy but sparse create bounds on demand that is why it can't distribute in sparse since there is no predefined container(bounds). But has someone cracked this...? Simulation sparse on multiple machines
  14. Hi everyone ! I was wondering if it was possible, on a geometry deformed (by a point deform SOP) to simulate only parts of the geometry that were masked with vellum ? (if needed, I uploaded a scene with the mask I want to simulate). Thanks a lot for the answers ! Vellum_on_mask.hipnc
  15. Free video tutorial can be watched at any of these websites: Fendra Fx Vimeo Side Fx Project file can be purchased at Gumroad here: https://gumroad.com/davidtorno?sort=newest
  16. object vs data in DOP network

    are there any good resources to explain these two subject? object - data what are they exactly and what they do inside DOP network? any pages of documentation or any piece of information you give me is acceptable
  17. Ripple solver issue

    Hello ppl. I'm trying to figure out an issue with my simple ripple solver setup. The grid over which i'm triggering ripples, seem to moving down the Y direction slowly throughout the simulation. What am i missing? Attached the scene. Thanks! Ripples.hipnc
  18. Hi guys, I am learning crowd simulation at the moment, which is suoer fun. With the premade Mocap Bipeds, all works fantastic. But when I create an agent out of an FBX from Mixamo, it gets super weird. When I try to set up everything for the ragdoll, the collision layer shows me that bones are missing. Why is that? Did you ever experience that? Also the question? To I always have to set up the joints from scratch? Is there no autmatic mode that kind of defines the moving angles? Thank you so much!! Patrick
  19. Filling water tank

    Hi everyone, I have an issue about filling a water tank - my question is: how I can fill a wave tank emitting particles before? My problem it's when I start the simulation with a water tank all works fine but when I try to fill the same box with a emitter the fluid can`t get the same water line with the same particles amount. Here some screenshots and the hipfile. Thanks! water_fill_001.hiplc
  20. Hi, I'm having some trouble getting the 'Vorticity' attribute to show up in my cached sim: I've already made sure to check the 'Keep Attributes' for the fluidcompress node with 'vorticity' previously also checked 'Transfer Attributes' with 'vorticity' Also tried recaching everything again, but it still doesn't show up. Will appreciate any help I can get, thanks!
  21. fun and play with particles

    having some fun with particles.... birth of a massive star. for my little #astrophysics exploration, i’ve created a star simulation using openCL in houdini. its based on nbody #physics model, only driven by #gravity. using #nvidia #quadro rtx 5000 #arnoldrender. the colours are not quite right, I am trying to integrate kelvin colour temperature. the current colour is based on density and speed. In this simulation, I assumed 48% amount of negative gravity to fill the mystery of dark matter. I used 1 million nbodies for the simulation. for the steps, I am planning to add finer particle streams to get more details. fast particle rendering with path tracer is hard !
  22. Few nodes won't work on OpenCL

    Hello, I am trying to work with OpenCL but as soon I enable them on few nodes, like the gas disturb, gas turbulence, it stops working. I just get a mushroom smoke effect. Does openCL not work on these fields? I have attached some screenshots. The first image is without OpenCL, the second one is with smoke disturb disabled and the third image is with openCL enabled on Smoke disturb.
  23. Hi guys, I've already an objects rigid body simulation in a file cache. But I forgot to transfer v and w attributes in the output part of the RBD Bullet solver, and I need them to render with a motion blur in Redshift... How can add a velocity to my objects after the file cache ? Because the simulation take hours and I try to don't recalculate it ! Can you help me please? Thanks in advance!
  24. updating vellum constraints dynamically

    Hey all! I was hoping to get some help figuring out a way to update the stiffness value of a vellum constraint geometry across the frames of its simulation. I can write an attribute wrangle like the one pictured and it will update the starting frame and the simulation bakes from there and plays as though the values werent changing at all, much less becoming negative. I tried dropping into the vellum solver and seeing if I could figure out anything in there but nothing seemed to work. Im still pretty new to houdini so I expect it to take some time but I was hoping to eventually take whats done in these two awesome videos and merge them into a project where a genetic algorithm produces tensegrities that update their stiffness over simulated time in order to deform in ways that cause them to (hopefully) roll towards a target. Hip file of the simplest version of the problem is attached in case it helps! Thanks for reading!!! VellumConstraintsHelp.hipnc
  25. Gas Disturb - Help

    Hello, I am really confused with Gas Disturb node. I tried reading the documentation and tried different values but I haven't seen much difference when I change the Threshold Range value. Can some please help me and explain what exactly the Threshold Range is doing? Thanks.