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Found 512 results

  1. Vary RBD object weights

    Hey Everyone! I'm doing an RBD sim of multiple objects colliding. I am merging them and plugging then into the rbdbulletsolver. Does anyone know how I can modify the weight/density of one of the objects so it reacts differently to the other objects? Thanks so much!!
  2. Rbd objects emit particles

    i have some cubes that fall to the ground. I am trying to emit particles at the same time from the front side of each cube creating noodles that collide with the cubes. i thought the multisolver might come in handy but its not working so far. First time i am using it. Essentially i am trying to replicate grain emitted noodles on cgwiki https://www.tokeru.com/cgwiki/index.php?title=HoudiniDops#Grain_emitted_noodles but my source is an rbd object. i am not sure if this is possible. test.hip
  3. Hi everyone ! I'm having issues with the voronoi fracture on concave geometry. I'm trying to fracture a pillar which was created in C4D. To do so, I create a VDB and scatter points in it, then I use the Voronoi Fracture SOP on the base geometry. It works quite well overall, however on some curved concave areas the voronoi fracture fills the area, which I would like to avoid. I attached images to the post; on the second picture the darker parts of the fracture fill the hollow space. Does anyone know how to fix this issue ? Thanks ! PS I have not attached the .hip file since it's based on a heavy alembic file, but I can do so if necessary.
  4. help,,rbd force not working

    I've looked through a lot of tutorials. It won't solve I want force to affect 5 frames and run on 44 And more constraint is lost than is desired force.hip force.hip
  5. RBD of an animated imported object

    Hi guys, I have a big problem with destroying an external object (a shield) that contain an animation. I've imported it as alembic. I've timeshifted it at the first frame, then fracturated the shield. Attatched this part to the first input of the point deform node, in the second the rest pose of the shield and in the third one the animated geo. The purpose of the rbd simulation is only to fracture a little part of the shield as the shield had been hit by an ax. To achieve that, I've painted where the ax would it and make this mask attribute equal to active attribute for the sim; then assemble it. Basically what happens is that when the pieces are falling down and even if they are flying, they move according to the shield animation. Maybe ther is another way to prefracture it and give it the same animation.. maybe with a vector and copy to point to it, but i don't konw .... I'm really stuck.. If anyone has any ideas that would be great! I've attached the file of what happened. Thank you in advance for the attention! Fracturing_Shield.hipnc scudo.abc
  6. RBD Hold active attribute

    Hello guys. i creating an group to activate the pieces to start to fly. im using an sop solver in the pre-solve input to create those pieces active=1 However while move outside the region bound. it loss this attribute and simple stop. i tried to "hold" the attribute 1 using an max function, but i didnt work. please help me thanks in advance. ps: i uploading an simples setup of this hold_active_att.hip
  7. Hello everyone, Currently trying to get rbd Disconnected Faces to work over multiple packed geo that is pre-fractured. I noticed the same geo passed unpacked into the sop level Bullet solver node works and before impact the node removes inside cracks (glass) as expected and upon impact brings it back. Same geo setup as packed geometry, into a dop net, run sim (runs fine), unpack and applying rbd Disconnected Faces, just doesn't want to work. The inside cracks are there with the same threshold. I can see faceid and primdist in the spreadsheet. Just wondering if someone has seen this issue before. Screenshots attached for ref. Any suggestions would be welcome.
  8. Hi, I made some RBDs some are broken via RBD Material fracture and some I broke with boolean fracture. All have constraints and it looks good (picture a), but when I use a RBD constraints from Rules node the constraints looks crazy (picture b). So the animation looks like the parts are not really free and the broken parts are not flying away but hangs around the area as they would be bound to something. I think it is the matter of constraints. Can anybody give me a hint how to solve this problem? Thanks a lot! D.
  9. RBD texture problem

    Hi everyone I have an RBD fracture that works fine however the texture doesn't stick to the object once it fractures and moves. I tried several things such as copying the uv attribute however it still doesn't work. Any ideas of how can I make it work? Appreciate any help !!!! I attatch my file and a screenshot of my nodes many many many manyyy thanks in advance Julia frac4_foru.hipnc
  10. Hey there! I'm trying to fill a fractured box with water and make the water come out when walls of the box start breaking. The thing is that the collision works when the box hasn't been fractured yet but once one of the walls of the box starts fracturing, the particles start to clip through the box until they completely disappear. The box has thickness, I'm using a deformed static object with a vdb of the rbd fracture. The sim also have sub-steps. I uploaded the hip file, just in case someone wants to take a look at it. Thanks in advance guys! Flip_Collision.hip
  11. 3D Generalists and Houdini Destruction Specialists

    Hi guys, Come and join us for our new project! We'd love to get in touch with you, especially if you're a well rounded and seasoned 3D Generalist or Houdini destruction ninja with the skills outlined in the flyer below! Vancouver/B.C. area locals only please! You can check out our latest reel here: Cheers, Manu
  12. Hi, I have rbd object emit from DOP particle, and I scale each rbd over time by @age. But I want them to stop scale at a certain amount because I feel like they are big enough. How do I make them stop at the red marker size? Thanks in advance, Candy_FireWork.hip
  13. Hi guys, I want to push a rigid body (a ball), by the vellum grains, but it is not working! Any ideas? Thanks for helping. Vellum_Grains_01.hip
  14. I'm trying to randomly copy/instance a bunch of objects into a scattered point-cloud using the new "Attribute from pieces" and "Copy to points" nodes. I want to manipulate them in a simple DOPnet sourcing them with "RBD Pack Object" and solving them using the "Rigid Body Solver", but the solver doesn't seem to find the neither the "name" attribute or a compatible geometry. I can't figure out what is wrong with it. Can anyone help? (tried with SOP level RBD solver and it works fine. still i want to use a DOPnet) thanks in advance. (using Houdini 18.5.408 on win10) swarm-01.zip
  15. Voronoi interior detail

    Hello Everyone! I would like to add an interior detail for fractured pieces but I cannot seem to find the option in the voronoi fracture sop even though Houdini knowledge base says exactly this: "you can enable the Add Interior Detail checkbox on the Interior Detail tab of the Voronoi Fracture SOP node. This gives you access to parameters to bricker the flat planes and add some noise." (Link: https://www.sidefx.com/docs/houdini/dyno/voronoifracture.html) I also tried using RBD material fracture as an alternative as I can link it to an RBD interior detail but it messes up my geometry and distorts the etched logo so voronoi fracture sop is the cleanest reuslt I was looking for. thank you very much in advance! voronoi.hip logo-galler.ai
  16. firework explode rbd multisolver

    I rebuild the firework system base on firework workflow in Houdini 18 so I can have better control in several parameter. But how do I turn those sphere into rbd object and have them collide each other in a box. I watched the multisolver online from this guy ( ) but I can't figure out how to combine them. Can anyone help me please. Thanks in advance, firework box 2.hip
  17. Pyro and RBD interaction

    Hello, this may be very simple question, but I have struggled to find anything about the topic on my own. I am wondering how would you get pyro interact mutually with RBD packed simulation. Or what is the workflow for let's say explosion from the side of the building, when I want the explosion to be the force by which the building is being broken. I'd be super glad for any pointers or help. Thanks, Clear
  18. Hi, Is this the way to add a SOP Solver in the new RBD Bullet Solver SOP? I noticed that we have access to a lot of nodes inside it. It says "wire pop forces into here" but not sure how to hook up a SOP Solver. I'd like to set up some custom activation inside this RBD Bullet Solver SOP.
  19. RBD unpack sop lost UVs

    Hello guys, I'm setting up a active rbd pieces using rbdconfigure and rbdpack, after the setup even setting to transfer all attributes the UVs get lost.
  20. Hey magicians, I'm trying to attach vellum wires to an rbd but i'm having some issues, I can't get proper feedback on rotation and stuff, tried searching on the internet and seems more complicated than I thought. Attached is an example, any ideas or tutorials will be super helpful. Thanks! wGrZ5uUdX4.mp4
  21. metal RBD problem

    I want to make a bullet go through the metal. I was gonna use a particle to make it continuous. It's not working. What should I do? I want make like this --> shot_metal.zip
  22. Object pop collision

    Hi I'm working on a test with arrows soothing on object, a very basic copy to point with particles Right after the arrows emit the object they are not falling not in a natural way they are "standing" attaching image and the scene, hoping for some help in this thank you Arrows_Test_01.hipnc
  23. Hi all! I recently made a free public post on my Patreon, a bit of a New Year's gift. In my destruction classes & SideFX conference presentations I've mentioned that I often use geometry grouping to define the clustered sections in my RBD sims. However, it takes a bit of work to create the feedback for-each loops to set that up, so I've finally wrapped it up into a helpful HDA. Demo HIP file included as well. (I also included the HDA in the November 2020 'quick tip' post, but this version fixes a bug in the size-based prioritization, so for patrons that have that version I highly recommend downloading this one instead!) https://www.patreon.com/posts/45769153 https://vimeo.com/496659441 Hope you find this useful, and that you enjoy the new year! :-) ~ Keith
  24. Destruction III - CG Forge

    Check out the full course at https://www.cgforge.com/course/destruction-iii Cheers!
  25. Hello, I have been making several attempts to accomplish something like Matt Taylor's Seeds concept https://youtu.be/vUvEy37LhqE I have tried a couple of approaches including using a multi-solver but no luck. would really appreciate any input that helps! Motion_Graphics_Designs_By_UK_Based_Artist_Matt_Taylor.mp4 Houdini_Vellum_growth.mp4 Spheres_growth_v001.hip vellum_grains_growth_v004.hip Spheres_growth_v002.hip
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