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Found 44 results

  1. Hello.i have a question. I want to make this scatters move around like this picture by using solver, but dont wanna touch the high ground along the way. I have no idea how to do. Could you guys advise on it? I also attached file. Thanks Please Help me. ㅠㅠ Scatter_solver_scatter_v03.hip
  2. What's the best way to simulate dynamics with just 2D shapes? Is it possible to use any of the existing solvers to simulate rigid bodies, but also flexible curve/polygonal shapes that respect line to line collisions ? I've tried using the wire and the grain solver (with rest length on a network of lines that connect the points), but the collisions only happen on the point level, resulting in penetrations between shapes. Is there anything else I should look into, or a working example I can take a look? thanks a lot georgios
  3. 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
  4. I'm trying to make the ball retains the deformed shape after hitting the grid, then fades slowly to its original shape (in a similar way to Cd), but I can't figure out how to do it. solver02.hip
  5. Hey. I have a problem with overwriting values from wire object in SOP Solver. If klinear parameter (Linear Spring Constant) is set to 300 in wire object and then I'm writing inside sopsolver in point wrangle @klinear = 300; just for test, then my simulation looks different, less stabile (?). Why is that happening? This is the same value so it should be the same sim. I was trying to put sopsolver before and after the wire solver and there was the same situation.
  6. Hi guys, I wanted to do some soft body ripping effect and FEM seemed to be the best tool for the job. I'm having trouble holding the fractured pieces together until impact however, and it immediately breaks apart when gravity is active. Do I need a constraint to hold the pieces together like as one would with a typical RBD/Bullet set up and break them in a SOP solver? I figured that the fracturethreshold attribute is the clue, but I tested with values as high as 20000000 and as low as 0.00000001 with no visual changes. Thanks in advance!
  7. Hey magicians, I just saw a great animation by Diego Diapolo and there were some effects that blow my mind, I wonder how can they be achieved, is this wire solver? or can be made within pops?, also the green thing, is fem? any tips will be very appreciated here are some gifs: http://i.imgur.com/ResVXoy.gifv http://i.imgur.com/h92G1CR.gifv http://i.imgur.com/HGn8i0U.gifv And here is the entire animation (great one): Thanks in advance Cheers!
  8. Hey guys quick question: Does anyone know how to get a 'straight' wire from a wire sim when my input object is not straight? Example from the attached image: PIN1 constraints a straight line and PIN2 constraints a bent line, when the sim runs you can see that the input geo shape affects the solved geo. I would like the curved input to behave like the straight one. Thanks!
  9. fx

    Guys! Need your help! I stock.... Here is my issue. I have some particles that when impact with the surface (grid for example) create attr (marked as red for example). My task is grow this attribute by the time on surface in differnt directoins. I understand that effect can be achive by using SOP Solver, but can't understand for now how to do this. Explaning about how to make that happen will be highly appreciated! I attach hipnc file with my problem. Thank you advance guys! growing_attr_002.hipnc
  10. Hello! stuck a little, need help! reference https://www.shutterstock.com/en/video/clip-9239504-stock-footage-soap-texture.html?src=rel/9239561:1/3p I did a lot of tests with pyro and flip sims and came to almost what i want. biggest problem with pure fluid simulations - mixing of colors, resulting dirty one color, i abandoned this method. solution was to make particle advection while fluid simulations and it was good, but not enough detail. 1. to add details i have included 'add' and resample lines every frame, after 400-500 frame sim time makes me sad.. 2. there are still "black holes" (img) 3. points gives dirty render anyway. soap_effect_v01.hip soap_effect_v01.hip
  11. I am kind of stuck on how to use loops alongside of VEX...or even at all. I'm posting my example file, but what I'm trying to achieve is just to have a function repeat - and if possible in different ways. In my file, it's a line and I'm making the scale of the point equal 1, if the ptnum and Frame are equal. My problem is repeating it. I tried using the solver sop, but it did as expected and just compounded the spheres scale to equal 0. I'm not really sure where to go from here Any help is always appreciated! loop.hipnc
  12. Hi odforce people! Playing with the "solver" SOP, I was able to build some sort of dissolve effect (.hip file attached): geometry is converted to VDB each frame, I'm displacing the surface and boolean-intersecting the volume: This works great but now I'd like to output not only the shrinking volume but also the "delta" volume (the boolean difference between the resulting surface and the previous frame's surface) because I want to emit particles from it. Using a second "vdbcombine" node, I'm able to compute it but if I "merge" the volumes, they'll both be fed back into the solver loop and this creates infinite numbers of primitives after just a few frames. How can I prevent this from happening? Also, how can I split the results outside the "solver"? I tried adding group nodes and modifying the "name" attribute but can't get it running. Maybe solving the first issue will solve the second one. Any help would be greatly appreciated! Thanks, Hebi
  13. what's the difference between substeps on dopnet and min/max substeps on solvers. If the substeps on dopnet is set to 10.The globle parameter @Frame is increased by 0.1 every substep. If the substeps on dopnet is set to 1,the min/max substeps on popsolver are set to 10.@Frame doesn't change during substeps. Why is that?
  14. Looking for ideas to make Finite Element solver-driven spheres stick together or merge. Working on Lava lamp effect, trying it with FEM spheres blown around by a fluid's vel field. (alternatives seem to be particles/Metaballs or viscous Flip, but in reference sometimes the lava balls bounce off of each other in a soft body way.. hence trying FEM). including a sample file (FEM_setup node).. Youtube Lava Lamp Ref.. femBalls.hiplc
  15. 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
  16. How the heck does this work?! Within the solver is the attribute Transfer with "Previous Frame" in the left input and the Sphere in the right input. How does the solver know to transfer to the grid when it is not specified in the solver? Transfer_within_Solver.hipnc
  17. Hi guys, https://gyazo.com/6f0d777b1d67ca0ee1a454be01f34855 Above is a gif showing a Cd transfer from a sphere(red) to a grid(black) using a solver. Is there a way I can create an age attribute for these particles when they turn red. Then after a couple of frames they would revert back to the colour black. Any ideas would be great, thanks! ageTest.hip
  18. BulletSOP is implementation of Bullet library (bulletphysics.org) inside SideFx Houdini (sidefx.com). It's a plugin for creating incredibly large rigid body simulations on average PC. The Tool is very powerful, flexible and speed is very impressive as well as memory footprint. The plugin is free and without limits! So you can create truly stunning massive simulations. BulletSOP is compiled for Houdini production builds. It includes many example scenes (beginner -> professional) which are probably the best learning resources. Main features: - Bullet RBD Solver - Support for multiple Broadphases, Constraints Solvers - Loading data from previous frame - Geometry decomposition (Tetrahedra, Voxels) - Static/Animation body - Convex Hull - Compound Hull - Deform static Hull - Primitive Hulls - Constraints (auto-generating, spring, 6DoF) - Collisions Groups - Object Forces - Point Radius Forces - Delete Duplicity data - Instancing - Emitting system - Includes many example scenes for studying - Support for Windows(64bit), Linux(64bit) and OSX(64bit) Links: Houdini: www.sidefx.com LinkedIn: www.linkedin....Houdini-4796605 More author's videos: vimeo.com/user3251535 Create freely, simulate quickly and enjoy fully! Best wishes, Milan Suk Download BulletSOP v2.0.15 for Windows, Linux: http://bit.do/BulletSOP_v2_0_15
  19. 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
  20. 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
  21. Hey guys, I am using a foreach block in a solver sop but the foreach causes my point orders to changes, if I bypass the the foreach my point order stays intact as the points accumulate. In the foreach I am using a static point attribute that exists on the points before they enter the solver, and in the solver I want to use the attribute to apply different transforms to the points based on geometry with a matching attribute. Everything about the setup works apart from the point orders changing as the point increase messing up my system later down the line. I attached a simple example to illustrate the problem. Any ideas for what I am doing wrong or could do differently? Thanks, Zybrand foreach_point_order.hip
  22. Hi, playing a little with matts branching example http://www.tokeru.com/cgwiki/index.php?title=HoudiniVex#Solver_and_wrangle_for_branching_structures I have a sphere with a custom attrib int @active = 0. I set one point as active and after that a solver with a wrangle for the grow effect. That works fine. But I want to create a setup where I use another obj to set the first points active instead to create them manually. I did that with attribute transfer. So as the solver only runs on "active" points I created another sphere with active points to transfer the attributes. But then the solver works no longer. Thats a little bit confusing to me because I thought for the solver sop has nothing changed. I attached a file for better understanding. I would be thankful for a hint here. kind regards Jon houdini_grow.hipnc
  23. Hi, Before starting and explaining what is all about, which is kind of obvious, I've search on this forum and official houdini forum to solve this problem but none of the subjects came across with a straight answer. What I want is simply filling the glass. The collision geometry is really thick, as is suppose to be, added a divergence attribute, which is ridiculous high, just to get the glass filled (as suggested on other posts) but still it's like the glass has a hole somewhere and stays at the same level. See the image at frame 46. In tried also in realflow and it fills the glass normally. I've attached the file in case someone want's to dig in and have a look. Thank you in advance. fill_glass.hipnc
  24. Hi everyone! I would like to share our student short-movie, we done all the FX with Houdini and some render as well. (PDB, RBD, Smoke, POP Particle) link : https://www.youtube.com/watch?v=7HS6V0S7YbM We would like to thank again all the people who helped us accomplish our goals and make this short film. Without them we would never had won so many prizes (12 nominations, 3 prizes, broadcasted on canal+ & Futuroscope)! Thank you to OdForce, Houdinimatic, Houdini Forum and a huge thank you for the free licences that were provided Houdini We would never be able to do this movie without you! Fell free to share it !
  25. Hello Everybody, I'm working on a Cloth Simulation in which I'd like to have a set of points to be Pin Constrained. But I'd like to change the Pinned point count over time, so it releases the constraints as the animation goes on. In the documentation on constraints I've found this: How to change the points that are constrained with the pin constraint during simulation By default, the Constrained Points list does not expect the points to change. However, there is a way to work around this and have the list freshly evaluated by DOPs on every frame. Right Click on the Pin Constraint node and select Allow Editing on Contents. Dive into the Pin Constraint node and select anchorobjpointgrouppos1. Change the Point Group parameter to Set Always. See the Anchor: Object Point Group Position help for more information on this node. http://www.sidefx.com/docs/houdini15.0/dyno/constraints So I've tried to do these steps but I couldn't get it to work for some reason. Maybe I'm missing something obvious. I've uploaded a very simple scene file in which I've grouped a set of points and animated the grouping bounding box. If it's no too much trouble would you guys mind taking a look at it and see if anyone can help me out with this issue? Any help or advice is much appreciated. Thanks for you time. Cheers, Laszlo cloth_animated_pinConstraint_v001.hip