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Showing results for tags 'SOP'.
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Hey all. Just posting a new tool I recently wrote in case anyone is interested. It's an HDA for saving attributes into either data textures or mesh vertex channels for use in realtime shaders. I needed to do some fancy pivot caching and mograph type stuff in a Unity shader and after hacking together a solution with a python SOP I figured I'd package it up nicely for future projects. https://github.com/pixel-ninja/packChannelsHDA/releases/tag/v1.0 -
Hi. I am testing FLIP sop, in particular "flip configure lava". As a temperature input "anoise" was used. I would like to animate it but when you animate anything outside the solver it is obviously not updated within a sim. If I were about to make it with dop network I could have make a wrangle with a reference to sop level animated noise. But FLIP sop converts geometry already inside solver so I can't refer to any point attribs as long as particles sims are implemented already inside solver and don't exist on a sop level. My question is how to animate any attributes inside flip sop solver?
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I start to learn the new sop fluid workflow, but there is no uv data on final output mesh. How can i keep uv from the beginer model to final fluid mesh? fluid-test.hip
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Hello, I have a tube, I want to animate the radius scale. So that it expands and shrinks randomly. I want it to look like it's being animated by a noise. My problem is that I don't know how access the radscale in the tube geo. Thanks!
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Create point group which are not connected
Apurba Haldar posted a topic in General Houdini Questions
How create point group which are not connected. like the ss below?
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Hi! I wanted to know if there is a way to extrude points to generate curves from that extrusion, I was surprised that the Extrude SOP didn't accepted that kind of operation. I had a workaround for doing this using the "Copy to points" SOP to copy the input points (the ones that will sweep trough the target curve) to each point of the target curve and orient them via "orient" attrib also I had to define an "id" attrib" for each point so then I'll connect them with the "Add" SOP. Anyone has better ideas to tackle this? Thanks!
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Hello, Trying to work with RBD bullet solver and conetwistconstraint, but I found a limitation in SOP Bullet solver, cause it has only one conetwistconstraint settings, and in case if I have more than one conetwist constraint it become a problem. I tried to add it inside solver but have no success.
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Hello For a cloth set up I need to have the same remesh (via Remesh SOP node) result of an object on each shot. The object to remesh is the same in all shots, but is Position change. I can not dive in the Remesh node but it seems that while translating an object, is remesh result change. What I want to achieve is to have the same remesh result for each object base position. My ideas was to use a rest pose, or find a VEX function that does the same as the Remesh node but I can't figure it out. Thank you for ur time -
Hi all, Is there a way I can use a shelf tool python script to select a joint in the rig tree window pane when I have a rig pose SOP selected? -
Hey, bit of a specific use case here, but has anyone successfully used the .asCode() Python function with the SOP solver? I can't seem to get it to save and recreate the nodes inside of the sop level solver node. I spent some time researching it but haven't found anyone even mentioning this problem. Everything else seems to work fine with the function even the DOP level SOP solver. It's just the SOP level solver that has this issue. I'm kind of at my wit's end trying to figure this out. I might be missing something super simple or obvious here, but I'm hoping someone else has encountered this and figured out what is happening. I suppose it could also be a bug, I haven't taken the time to dig through all the change logs on the SideFX website. I'm currently encountering this in Houdini 18.0.348 (which has known issues with the .asCode() function) as well 18.0.597 (where those issues have supposedly been resolved). If anyone has any insight I'd really appreciate a nudge in the right direction. Cheers, Brandon
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Hello, I'm han. I have a question. I did Sphere -> Mountain(noise animated) -> Scatter & Sphere -> Mountain(noise animated) =Points and Sphere Merge (*so I want to sphere moving and scatter points are also moving) but Scatter points are jittering(not stick to sphere). How can I fix it? Roughness down, Octaves down -> Little bit comfort movement but, is that solution to not jittering(not change roughness or octaves) ? Thanks!!
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I've laid out UV's procedurally in Houdini with the sweep or skin sop and using arclen on the input curves, but I'm wondering if there is a solution to straighten/unwrap geometry that is generated in ways other that using a sweep or skin SOP. If anyone is familiar with the Unfold Strip from Loop button in 3dsMax's Unwrap UV modifier it basically takes any edge or loop input and straightens out the geometry into a strip. It's super useful for cylinders and chamfered/extruded edges. I'm wondering if there is a workflow to do something similar in Houdini. I tried messing with the new FlattenUV node and I can get something kind of close with the enable loop straightening, but the UV's are still wobbly and not perfectly straight.
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Hi everyone, Anyone knows how I could get the world position of the tip of a bend deformer handle? (see image)
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Custom importer for Quixel Megascans Bridge inside Houdini Sop. These videos shows an example of working with 3D Scans and Surfaces https://github.com/andrey214/aa_tools https://vimeo.com/638435887 https://vimeo.com/638435845
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Hello! I'm following this tutorial: and have been getting similar results up until around 22:10, when my simulation behaves entirely differently. My worm just goes flying. I've messed around with the values in the set_force attribute wrangle inside the sop solver, but can't seem to get anything like what he is. Obviously it's working to some extent, because a force is being created. I'm pretty sure I did everything the same as him... can anybody help me out? Here's my file:Larva2.hipnc
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Hey everyone! This is my first post here! I have a scene where I'm caching a vellum grains simulation to a disk cache. I'm having trouble understanding why it takes so long. When I cache the simulation to ram in the viewport each frame takes about 15 seconds, however when I drop a File Cache SOP and save it to my hard drive each frame seems to take about 3 minutes. Could someone explain why this may be? I have tried saving to another drive and it didn't help.
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Hi. Im trying to make a growth setup. The simulation is too fast for me. I try to increase the FPS but didnt work. I also try the Retime sop but didnt work too. How can i make slower version a Solver Sop simulation? Thanks. 002.hip
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Hey Houdini Users ! I am currently making a wetmap for my shot and I am having issue with the stepping when using the solver SOP. I tried increasing the substeps and also putting a Timeblend+Timeshift to interpolate between frames but neither of them seems to be working. If anyone know how to clear out this stepping and have a smooth trail for the wetmap please enlighten me Attached are the files, one is gif and other is mov. Wetmap_v001.mov
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Hi all. This should be easy, but it's killing me... I have a control object living outside a DOP network, a simple particle system. I've plugged it into the second input. Inside the DOP I access this control position without issue, in a VOP. However I then want to follow up by killing particles in a POP wrangle, based on distance to the control object... Easy right? Here's my vex: f@dist = distance(@P, v@opinput0_P); if ( @dist <= ch("threshold")) { removepoint(0,@ptnum);} ... simple. But it kills particles around the origin, not the control object, as if v@opinput0_P = {0,0,0} I've tried multiple variants on opinput, explicit path and the point function etc but it always gives me a "kill" radius around the origin, not the control object. Anyone see what I'm missing? Thanks in advance!
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Is output of cop2net in SOPs different than a regular mesh? Nothing seems to work (deleting by @ptnum, @Cd attributes). I hoped that Houdini could provide some image processing combined with subsequent geometry processing.
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Hello, I would like to get rid of these edges and keep the bigger rectangle. How can I do this? Thank you
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I'd watched the video showcasing distributed particle sims, but only recently it occurred to me that this technique only applies to DOPs? Am I correct in saying that there is no general solution to distribute SOP cooks? For example, slicing and aggregating (map-reducing) VDB clouds or any VEX snippets on large meshes?
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Hello there, Before in Houdini GamDev has a sop called group by attribute. So if I use name node to group primitives, pack them then just use the group by attribute node Houdini will recreate all the group based on the name attribute I had In Houdini 18.5 it has a node called group from attribute boundary which does similar thing but I can't figure how to set it up so it can auto create group based on name not manually set up each name like in the photo I hope I explained it well. Thank you for reading this
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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
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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.
