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Found 14 results

  1. Hi guys, How can I make an interaction between a FLIP-Fluid and a vellum object? Is it possible? Thanks for helping. FLIP and Vellum Interaction_01.hip
  2. Hello I would like to create a Fluid-RBD interaction. But as you can see in the image below, the fluid pushes the rigid body so strongly. I need the rigid body to be a little bit heavy and to float on the fluid, based on its mass attribute. (Decreasing the "Feedback Scale", didn't help). Thanks for helping. RBD-FLIP Interaction_01.hip
  3. Hi guys, To complete a personal project, I'm looking for a tutorial about the interaction between FLIP and Grains. Thanks for helping.
  4. Hello. I'm working on fluid sim which pushes RBD objects. RBD object's interaction(without Fluid) seems fine in Bullet and RBD solver, but when I came to make flipfluid to push RBD objects(not packed) forward, it seems not working. I tried days for fixing the problem, but I cannot find a solution for this... Am I missing something here? Here is the result movie and .hip file(H18.0) of my basic setup. Seasaw_RBD_x_FLIP_interaction.hip Seasaw_RBD_x_FLIP_interaction.mp4 Any helps, kindly suggestions are welcome! Cheers, koba
  5. Hey Guys! I'm trying to find a way to interact Vellum Grains with curves using Vellum Hair/Cloth. Attached you can find a test scene where you can see an simple example. In this example there is a switch node with three different setups: 1) Hair 2) Grains 3) Cloth My goal is to have both interacting with other, in a mutual setup. But only grains seems to work... But not as I expect, cause I'd like to have a stiffer line behaviour. I know hair can give us this, but how to make them interact? Thanks a lot! Cheers. grains_interaction_test.hiplc
  6. Greetings, I'm working on a simulation, kinda a classic one, with Viscous Chocolate been poured on Yogurt. Basically a Viscous Liquid Collides with a more Viscous Liquid. I did the Chocolate pouring and it looks really nice at first, now I need to replace the Ground plane with the Viscous Yogurt. I had the idea of using Narrow Band for the Yogurt surface and using double viscosity than the chocolate. But in my bad luck you can't Merge 2 Flip Solvers. I've read that you can use 2 Flip Objects though, but how do I import the Narrow Band in one Flip object and the other Flip Object points at the Emitter from Volume Source ? Basically, how do you have 2 different Fluids(with different attributes), one imported as Volume Source and the other as Narrow Band? Thanks in Regards
  7. Group of friends and I are starting a small project, and while we're doing all rigging/animation in Maya, some characters rely on effects that would be much more easily achieved in Houdini. These are generally quite basic, and we're looking to minimise the amount of shot-specific work to be done - I'll ideally write the effect once, and use it over the whole show. Once I have an abc or fbx export, what is the best way of reading that in Houdini to the maximum level of detail? For example, one character has panels of LEDs that form screens, which in turn display depth maps calculated from each LED's normal - there are about four hundred separate LEDs, so ideally I would have a locator for each one, with X facing out the normal, bake out character anim as fbx, import into Houdini and just instance a setup across each locator - I don't know how to do that. Others require things like sparks between contacts, thrusters, etc. How is it best to achieve this? Via Metadata? Naming convention? Custom attributes on locators? The other approach is to use HDA in Maya, which I know nothing about - ideally would like to keep the two separate, if nothing other than to make look dev easier. Let me know your ideas. Thanks!
  8. Hi guys, I’m trying to get POP object and a FEM object to have two-way interaction. The pops are colliding with the FEM, but the FEM object is not being affected by the impact of the POPs. What do people think is the best way to get this to work? Currently I’m playing around using a SOP solver on the finite FEM object to bring in “feedbacks” input. This seems to contain a the particles that hit with fininte element. The pt’s have hit attributes and, “impulse” and a normalised “normal” attribute which I assume is direction. Not sure the best way to apply these feedback points to the finite element. Which attr should I modify and what do we think is the best way to lookup the "feedback" data? Perhaps a point cloud lookup? And suggestions greatly appreciated!
  9. Sup guys, I'm trying to make a Fluid pushing a FEM sphere. I've found some information about fluid force + some setting on the flip solver but the FEM object just don't move. I'm clearly doing something wrong. Can anyone help understand what's going on? Thank's, Alvaro FLIP FEM.rar
  10. Hello guys, I have this simple scene with a cloth (grid) pinned on all 4 corners and i'm trying to make it interact with an RBD Sphere. Can anyone give me a tip on how to achieve it? Right now the sphere is just passing through the cloth. Thx in advance. Alvaro
  11. Hey everyone, I've been working in Houdini for some months now but I'm still not as fluent as I'd like to be. Mainly I've been working with different types of fluid behaviors, RBD, shattering with voronoi, etc. For the last month I've been learning VEX and VOPS. Although I don't know how I should approach this project. I need to create a bubble bath effect which interacts with a character for proof of concept. I was thinking of creating a filler object inside the tub, use it to scatter points, copy spheres and randomize the size, then create a POP network to play with the motion of the bubbles. This method just seems way to simple for the complexity that is Houdini haha, I'm also not sure if it would work. I attached some pics of what I'm looking for, but any advice would be greatly appreciated!
  12. Hi there. I've been searching for the answer for this for a while and I can't seem to find a concrete answer. Well, as the topic says I have two (or more) flipfluidobjects in a DOP network but I need to be able to: 1. Have them interact with each other 2. Be able to assign different shaders to them. When I merge everything into a single flipfluidobject and surface it, I can't figure out a way to mask one from the other. Sorry if this is a very basic question, but I'm at the end of my rope Obviously new to Houdini.
  13. Hello All, Been lurking for a bit since I started dabbling in Houdini, and must say am in awe of the level of genius on exhibit here! Houdini is still kicking my ass in so many ways, but I'm a glutton for punishment I guess, and looking for excuses to spend less time in Max. This is a simple setup that seems to work OK, but I'm curious if there are other/better ways of getting these 2 solvers to interact. Currently I'm using PopAdvectByVolumes on the Grains to transfer Vel from the FLIP sim, and building a collision SDF in a SOP solver attached to the Grains sim which then gets pulled into a SourceVolume on the FLIP sim. I'm sure this is nowhere near physically accurate, but it does look pretty neat, and can be improved by adding custom attributes on the grain points for wetness etc. Thoughts? --Dave DJS_ODForce_FLIP_Grains_Interact_SampleSetup.hip
  14. I'm trying to create a effect where I have objects inside of liquid. The FLIP simulation alone looks nice but after adding around 50 Bullet sphere's to the sim the result is lot worse. Feedback scale is set to one and reseeding is turned off. Overall the interaction between Bullet and FLIP seems to be working fine but it feels that the liquid is losing some of the volume. Point count doesn't change tho. I tried both packed prims and usual geometry for Bullet and I am using usual geometry at the moment because I got better results with it. Any thoughts on how to keep the volume of the liquid same? Oh and Houdini I'm running is Cheers!
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