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Found 142 results

  1. 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.
  2. 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!
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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!
  10. 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
  11. 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
  12. 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
  13. 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
  14. No collision between Cloth and Solid

    Hi,I've been looking for answers for days about that issue but I can't find anything anywhere on that matter. I don't have any collision happening between a cloth object and a solid object but they are both on the same finite element solver, so why doesn't it work ? I asked a friend of mine to try and it's the same, he can't have collisions between a solid and a cloth object. Does something changed in v15 ? I've watched tutorials on cloth but they were on v13 so the solver was a bit different and I didn't find any tutorial on cloth for v15.On a forum a member shared a file that was supposed to work but it didn't, the piece of cloth went straight through the solid, no collision.Does somebody have information about that issue or do I have to add some node to enable the collision ?Thank you,Rob
  15. Wire constraints to cloth object

    Hi guys I'm not able to figure out how to attach one of my wire object ends to a cloth object. I tried different constraints but none of them accept cloth object as goal object. So can you please look at this file and give me some advice. Thank you sail.hipnc
  16. stitching cloth

    I have one cloth object which I have pre-cut in a certain way. I want to have it stitched when the simulation starts but at a given time I want to gradually break the stitches. What kind of constraint can keep two points of the same cloth object together? sbdpinconstraint pins points in space, which I don't want. clothstitchconstraint is meant to work between two different objects right? It kind of works if I set my object to both constraint and goal object, but then how do I create the associations between specific points? Is there something similar to constraintnetwork where I can explicitly specify the constants between points? thank you
  17. Hey guys, I wanted to change some geometry progressively to a simulated cloth Object. After some tests I now ended up with an aproach that sets the @pintoanimation attrib to zero if the @Cd attribute is going to a brighter color than black. Like you can see in the hipfile I create a group in a sop solver which progressively colors some points to white and after that I set the @pintoanimation attrib to 0. That works fine. ( idea stolen from peter quint ) Here comes my first question: If I do exactly the same only with an solver sop instead with the group sop it does not work anymore. The coloring of the points is working though. I do not quite understand why. But I would more likely color my points via the solver sop for better control. As I couldn´t wrap my head completly around dops I will ask a additional more general question: First I created this color growing effect in sops and thought to import everything in dops and then use the changing colors there to play with. That was not working. So I find out If I want to have something like an live exchange of my attributes from SOPs to Dops I always need an SOP Solver combined with a multisolver which feeds in my actual live data from SOPs to DOPs every Frame. If I do not do that I only have the first frame of the SOP network which doesnt change anymore even if the geometry changes after some time in SOPS. Is that right? kindest regards Jon TurnToCloth.hiplc
  18. CLOTH to CLOTH Constrain

    Hi, Any one please explain me how to attach based on point groups to attach two or more cloths together (similar to component to component constrain in maya) Attaching with animated objects based on groups works fine but if both are cloth objects constrains won't update while simulation. Also my simulation freeze after frame 62 any one please guide me a proper approach. Please check the attachment for reference Cloth Constrains Issue.hip
  19. Cloth Simulation for Crowds

    Hello, Does anyone have a solution for creating dynamic cloth simulation for crowds? For instance, a crowd running with flag poles using a prop following the crowd agent layering method? If someone can accomplish a dynamic cloth asset with either .abc cache file or houdini cloth for crowds I would love to hear your technique. I have included: flagTest.abc (nCloth flag animation on pole), screenshot showing example method for using using .abc assets for crowds, tutorial for agent layering method for crowds, and tutorial for constraining houdini cloth. Can anyone manage to get flagTest.abc be used by the biped character 2 for Houdini crowds? Thanks! flagTest.abc
  20. Hello, I encountered problem when I tried to dynamically change groups for cloth constraints. I've tried SBD Pin Constraint to attach cloth to animated geometry. As goal object I used geometry with same topology but animated one. When I am not changing pin group it works fine, but I need to change constraints during simulation. But then it goes funky, it seems as it cannot correctly assign constrained point to goal point. Next thing I tried was to use Cloth Attach Constraint node which works almost fine, but during updating pin group points slide over goal object. Could you check attached file? I am not sure what I am doing wrong. Basically what I want to do is to attach points of cloth to animated geometry and then release it. Is there some other way to achieve that? Thanks, Juraj jt_update_groups.hipnc
  21. inflatable wind sock

    Hi everyone. I'm looking down the barrel at a very cool project that involves creating a CG wind sock and blowing it around in the air. After poking around in Dops for a while I decided it would be a good idea to involve the expert Houdini community. Essentially I need to create a wind sock that has air flowing through it, bending it, flapping it, etc. I also have to animate it like a character. My idea was to create a soft body simulation of some sort that uses a sop animated cage as a target. If anyone would like to prototype it I am attaching a hip file that sets an example scene up. My intention was to post an example of where I was at but my attempts have been so unsuccessful I didn't want to contaminate everyone's thinking. The sop "TARGET_FOR_DOPS" is just a stand in for the keyframed animation I will need to follow. Thanks in advance to anyone with any ideas they can share. I'm very grateful as we are a bit of a pickle here. wind_sock.hip
  22. Cloth based Paper Confetti Setup

    Hello Houdini pandits and Gurus, Well i am looking to make a cloth based confetti setup. But the setup that i make is just based on particles and i want to push it further ahead from that. I don`t know how to bring cloth solver in particle. Please help me Confettir002.hip
  23. Hi all Regarding cloth sim, im trying to import "overallstiffness" attribute (half paint geometry and used attributecreate with fit($CR,0,1,100,2000) to make half cloth more stiffer than the other half cloth ) into dop and it do import values but its not working. any clues? pics and hip file attached. Thanks cloth attributes.hip
  24. Hey, Really simple question, however I'm having trouble finding a good solution. How do I stop a cloth simulation using a container or bounding box? I'm using the Finite Element Solver to simulate several objects and I want to kill the geo once it moves out of camera so it doesn't have to simulate it. I need something similar to POP Kill but for cloth objects. Thanks
  25. Hi all, would like to pick your brains again here is what I'm trying to achieve: Blue-print roll in and unfold. It will have a blue print textured and I can't stretch it (at least not too much, and ending up un-stretched). I'm just starting, and only tested a cloth approach. I managed to get an "ok" rolled-up tube, but I'm foreseeing big penetrations and other pb with this method. Blendshapes could work? But with a way to maintain cord-lenght. Thanks !
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