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Found 129 results

  1. Cloth collision like gum

    Good morning people: I'm a beginner in the 3D world. My main skill is photography and I'm searching a way to integrate some kind of VFX onto my images. Now I'm trying to generate a kind of big sheet of bubble gum colliding with a head. I don't know it the Cloth collider approach is the best or FLIP could be better. I'm stuck in this part, with this setup, I need a more stretchy look but I don't know how to achieve it. Thanks for your time. Best regards, Pelayo. clothCover.hipnc
  2. Cloth Pins Modification

    Hallo! I want to somehow delete pins that are holding cloth, but have several issues with this. In simple example, pins get "ungrouped" by solver, but everything is disconnecting (there should be green balls). cloth_constraint_delete.hip I made very simple example file (that also shows how boolcut is destructive to cloth). My main problem is from more complex scene: What I couldn't replicate in simple example, but this is what happens when I try to add sopsolver (same as in example file), that is just removing points from group. Without it - it works fine. Points are not deleted, reordered, does not change topology. Last thing is WHY I'm trying to delete those pins: This is what happens when pins from similar spot are being separated by rigid simulation (rigid bodies hidden). I'm suspecting that it's when one "cloth poly" is attached to two different rigid objects. It won't tear, it will just stretch. Any ideas?
  3. Multiple Solver Interactions

    I'm gradually trying to learn various of Houdini's solvers (primarily cloth, pyro, and bullet for now) and I'm slowly getting to grips with how they work individually. What I'm struggling to understand, and also struggling to find good learning resources for, are the ways to create interaction between multiple solvers. I'm interested in setups for one-way interaction (eg. pyro affected by bullet/rbd sims) but even more keen to understand two-way (or more) interactions. For example, how to have cloth and bullet (and perhaps pyro as well) all working mutually in a dynamic simulation, all affecting each other. Can someone point me in the right direction towards learning how to combine different solvers together? Are there generic ways for doing this (in other words combining cloth and bullet would involve the same understanding/setup as combining pyro and cloth), or does every solver/combination have its own idiosyncrasies when trying to combine? I found this video about combining pop and bullet solvers: https://www.sidefx.com/tutorials/combining-solvers-with-a-multi-solver/ I assume a good understanding of the multisolver is key here. But the multisolver doesn't accept the cloth solver as an input, so it seems like there must be more to it than that... Any help much appreciated!
  4. Hello, In Houdini 16 is there a way to add a spring constraint to a Coth object. Want to simulate rope/cable anchors. A standard pin constraint with Soft doesn't feel like the cloth is tied down by rope and would also like to have that Max length parameter. Alternatively, if I can use a Wire simulation to be used as a spring constraint that would also work. However, my attempts at doing this have been disappointing. Wire sim would either become the dominate force by pulling the cloth down like a lead weight or the cloth with pull the wire like taffy, And large values were used in the wire setting to no avail. Any thoughts? -Thanks
  5. cloth doubt

    Hi i have a grid cloth and i would like a group of points >prims (those straight in the middle) to be much more stiffer and less propense to bend than all the rest. it doesnt work im doing something wrong anyone can please take a look to my file? bendstiffness_attribute.hipnc
  6. Vacuum, Cloth?

    Hi anyone knows how to achieve this effect? I tried using cloth and sop solver, where in sopsolver I use peak sop that shrinks geo every frame, but how to make it stop when it reaches the collision geo? Thanks Janis
  7. Hi, I'm wondering how to go about creating a static shape of a stretched cloth/rubber sheet. Something like this: I've got an overly complicated version working where a set of points are constrained to primitives belonging to another geo but I suspect there is a way define pinned points and everything else is under some stretched force? Maybe initial state or rest geo is just a smaller version of itself? Thanks heaps!
  8. Animal Logic (Sydney) are looking for experienced Houdini Character Fx Artist and TD's Applicants can apply here: http://www.animallogic.com/Careers/Jobs (Sydney -> Senior Character FX TDs – Peter Rabbit) We are seeking High Mid + Senior Character Fx positions Basic Details/Requirements: Artists will be Responsible for the generation of shot-based, skin, hair, feathers and cloth within Houdini. Production experience in television commercials, film or animated features A very good understanding of Houdini, ideally specialised in the following sub disciplines Cloth solvers (Houdini's own solver or Carbon cloth plugin) Wire/Hair solvers (DOP and SOP workflows) Vex/Python scripting Skin deformation techniques Creation of Digital assets thanks for looking Miles
  9. Hey guys, I really need some help here, I'm in the middle of a project and can't export the simulated cloth with proper UVs (exporting it as alembic / must work in Maya) Here are some statements about the situation: - if I export the grid mesh, with no simulation, the UVs are read correctly outside of Houdini; - if I export the simulation, directly from the dopimport1 node, it doesn't work outside of Houdini; - the UVs are ok when I import it back to Houdini (and unpack the geometry); - the cloth is gettin' ripped on my original scene, this way I can't use an attribute copy to get the uvs from the original mesh (since it's point count is changing); - If I import it to 3ds Max, it work's at the first frame but as soon as I run the timeline it get id of the uv. I can get the 1st frame uv to stick to the object if I add an Unwrap UVW modifier to it. Tried to export it from Max to Maya but it doesn't work; I did a quick test here in a much simplier scene, with a plane only and get the same problem. The scene file is attached + 2 exported alembics (with and without simulation) Thank's in advance Cloth Problem.rar
  10. Applying vel to cloth through sops

    Hey, still playing with the FEM cloth model in Houdini. Found that applying forces through the drag model works much better in terms of simulation quality. So I generated some vel field in sops and imported it into dops. Unfortunately the velocities aren't affecting anything. I took the sails asset from orbold as an example but still something isn't willing to wor. Hope someone has got an idea. Attachments: vel.hiplc
  11. Animated granular sheed

    Hi, I was searching for a better way to simulate cloth like sails or flags and ended up using the grain solver. It gives me some pretty nice results compared to FEM. I also can pin some points down with a mass attribute but can't pin the stuff to an animated object. Any idea how to do this?
  12. Cloth sim for sails

    Hey guys, I'm struggling with the fem solver. Basically I would like to create a realistic looking cloth sim for the sails of a ship. Unfortunately I just can't get it to look right. The wind force deforms the object like animated noise insteat of adding variable velocity. I fit01ed nearly every parameter on the wind force or uniform force but it keeps looking like jiggly gum, not like cloth floating in the air. Can anyone show me an easy example on how to achieve something like this? https://vimeo.com/136480165 [vimeo.com]this is how my gum looks like: https://vimeo.com/197677800 [vimeo.com]Thanks!
  13. hello all, is somebody has solved problem like this, when i substepping the simulation into 10 substep on the dopnetwork, then setup the step playback frame into 0.1, then i write the cache with step 0.1, i got error number sequence. i had try with freeware for batching rename, but still didnt get the patern number because every 10 frame, the lenght of the filename was difference. its okay if the range under 100 framets but my frame above 3000 fame, its paintfully if i manualy rename the file. is there anyone ever had solve this case? thanks all.
  14. Hi, I'm looking to create a paper cloth simulation for papers that twirl over the street blown by a slight wind. (like tumbleweed) I was thinking to simulate spheres with RBD and use these points to drive a cloth sim. But I can not get that interaction to work. The cloth object is not updating the position every frame. So I was thinking of using a constraint network. Has anybody got experience with this kind of simulation? Or other approaches I could use? Thanks!
  15. hello all, i want to achive the object fracturing with cloth, but when i input the sop solver on the dop simulation to read and animation the pintoanimation, the simulation break and error on frame 6, is there any know why this happen, im follow peter quint tutorial bythe way. thanks all, hope some one can help me with this. i attached the hip file. tireMorphing3_fracturingCLoth.hipnc
  16. hey guys its just a quick question - i have a simple ball... quick vor fracture on it, remesh, make it cloth object. enable fracturing/tearing. I have it being crushed by another object and i was sort of expecting the piece to move outward as crushed but its not really doing that in fact it isn't really tearing either. Is there a force i can apply in dops that i can animate maybe that would try to 'expand' the cloth or push it outwards more so the pieces sort of rip apart and outwards if that makes sense? there's impulseforce i think but i'm not really sure what others i can use to try and urge this thing to split as its crushed? thanks! ant
  17. Got this file here.. can someone set it up so the pieces that are ripped off by the colliding sphere are affected by gravity. The sphere that is being hit is supposed to stay in place like being static, but get ripped to pieces. CLOTH_CRASH.hip
  18. Hello, I am trying to make the sails and flags on a pirate ship blow with the wind (that is blowing in the -Z direction). But no matter what direction I put in the velocity parameter in the wind force node, the cloth only blows in the X direction. I thought at first the issue had to do with constraints or maybe one of the cloth parameters but I've played around with almost everything and I just can't seem to figure it out. Can anyone help me figure out what's happening? boat_resized.obj boat_flags_03.hipnc
  19. finite elements

    Hey Guys, I'm trying to create a stiff look to my finite elements, using a solid object and embeded geo and also using a hard constraint to attach my geo to an animated one. Everything seams to work fine, except for the look I'm going for, whitch is a stiff look. I've tried all the presets that the solid object gives, but it seams like nothing is working for me, it always give me that jellow look! Any idea of how to make it look stiff. Thanks!!!!!! Mook
  20. Paint Cracking Method

    Hey all. I tend to read these sorts of forums a lot but never actually contribute anything, so I figured I should change that. Here's a somewhat lengthy write up of an approach to peeling paint off of a wall: http://www.pixelninja.design/paint-flakes-in-houdini/ I haven't been using Houdini long (only a couple of months) so there's probably much better ways of doing this. If so, let me know! Hopefully it's easy enough to follow along with. Blog/tutorial writing isn't something I generally do, so if you've got any feedback I'd love to hear it. Edit: added a hip file as per a request paintFlakes.hipnc
  21. Hi, I'm wondering how to get more control over a cloth simulation based on the finite element solver. Like adding a velocity field or something or using attractors? The goal is to direct cloth objects that fall by gravity but I want more control of where they fall and how they move. Thanks!
  22. Cloth collision

    Hi guys I'm doing a cloth simulation and I have some problems with collisions as you see in the image. I used volume sampling for collision and it is too heavy and doesn't make a difference so I used a proxy with surface method. I can't send the hip but this is my settings for cloth solver: Min Substeps: 1 Max CollisionPasses: 2 Can you guess what is the problem? Is it collision subdivision or something else? Thank you in advance
  23. Unfold Cloth Letters

    Hey guys, I am trying to have a folded letter or object and then unfold it and tangle a bit. I included my scene and i also have a folded position of the letter. I want to achieve an unrolling cloth effect similar to this tutorial for Cinema 4D but using the letter in my scene Thanks in advance, Valentino DENIM_JULY_V01.hip
  24. simple cloth tearing for fun

    Hi there!! I have been using odforce for a while now, but this is my first post! I have just been playing with cloth tearing using the SOP Solver to calculate stress by analysing the distance between points and removing them based on a threshold. Just did it for fun! Any thoughts, comments or opinions would be great! Or maybe it will help someone... HIP file is attached. cheers G stressTest_GraemePhillips.hipnc
  25. Hello folks I'm on my journey of switching from Maya to Houdini as a character rigging animation artist. I'v found it very facinating so far. I hope with your help I can find workout a few problems which I need to deal with at the moment. 1. Is there a way in houdini to tranform an object using 3 vectors at scene level (not at SOP level using Vex, Etc...) 2. Is there a way to control the effect of a Finite Element simulation by a weight map so the geometry stays intact in some parts? 3. How can I make a cloth simulation stick and slide on a colider so to be used as realistic skin effect? Any hints or tips or alternatives whould be greatly appreciated. Cheers -Ramteen
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