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Found 71 results

  1. Hey, I'm working on a building generator and I can't find a way to align my windows properly when the base shape of the building is oval. When it's a circle everything is okay : But when the shape starts to be oval, it looks like this : Here's the vop network I built to align it with a circle shape, but not functionning with an oval shape : I don't know what I miss to get it working... Cheers,
  2. Need some help with RBD Packed Object

    Friends, I cry for help. For some completely incomprehensible reason, the RBD Packed Object node in the Dop Network cannot receive data from geometry packed with Assemble. The SOP Path is spelled correctly, but no matter what I do, the objects do not appear, and an error in RigidBodySolver writes: “bulletrbdsolver: Warning: rbdpackedobject1 - / obj / particles / debris_physix / rigidbodysolver1 / bulletrbdsolver: Geometry solver ". If in Assemble to disable the Create Name Attribute, the error changes to: "Warning: rbdpackedobject1 - / obj / particles / debris_physix / rigidbodysolver1 / bulletrbdsolver: Convex hunt does not have any points." Obviously some kind of packaging problem, but how to solve it - I can’t put my mind to it. I checked the official Houdini help, but did not find any special RBD Packed Object requirements for the objects. Someone wrote that he had the same problem solved by turning on the Assemble node, but in this case this node is already working ... idol1.hip axe.obj cross.obj
  3. Hi there! I'm having a little problem with one of my houdini scenes, I have a fractured building, I applied some different shaders to it (like glass, concrete) however when I place an assemble node, my shaders are gone, is there any work around this problem?
  4. Hi, Looking for a clever idea on how to 'panel' any given geo into discreet units. Ill try to explain.. Basically I want to take a 3d model and divide the surface into different sections, each with a thickness. The sections would build on top or under each other and fit perfectly. There needs to be overlap between the sections / panels. The usage of this is to be able to 3d print a model that is larger than the 3d printer build volume, but instead of simply cutting the object and having the parts show a seam, I would like for the different cuts to be more like panels that overlap.. So a way to think about it is imagine a given 3d model, and 'patches' adhering to the model all over it until they cover it completely. There is some overlap between the patches, and they take the exact point position of the underlying geo (so there is no loss in detail). I then take each patch and extrude it a bit to add thickness. Is there a procedural way to do this? Obviously better if it would give me some control on the overlap of each panel, etc. Hoping that was somewhat clear.. trying to get a visual somewhere will post if I find one.
  5. Hello everyone, I am working with volumetric capture data and would like to have points scattered on it that moves with the data but also doesn't chang every frame. The issue is that the geometry, primitive number and uv's keep changing every frame. So I can't do the same trick I can do with mocap data using the primuv attributes. Anyone have any experience with this and how I should handle it?
  6. Hi, I'm trying to replicate an effect in Houdini that a free, but ancient and painful to install plugin (www.AutoPack.org) for 3Ds Max did. Mission: to position different 3D objects inside a larger object with zero to minimal overlap. The closest I've seen to this is in an Entagma tutorial (entagma.com/houdini-17-quicktip-packing-geometry-using-the-uv-layout-sop), but it is 2D packing due to it using the UV map. A colleague has gotten close using a VDB, scattering points inside, scaling different spheres for each point, preserving the adjusted pscale, and swapping out the geometry, but it's not really packing the objects in, so loads of space between them, and not quite the AutoPack look I'm going for. Short of simming the objects falling into a container for the shape I'm after, I haven't been able to find any other way to pack them together. Any Magician's out there with an idea on how to do this? Bex
  7. Octane Instances

    Hi everyone, I got an issue with rendering a Lot of Spheres in Octane. I scattered 1 million points on a surface and copied Spheres on it (with the CopyStamp SOP). I packed it but it does not render and crash. Can somebody tell me how i can render Instances in Octane or point out some Informations, i can't figure out how to do it right due im new to Houdini and Octane. Cheers!
  8. In Houdini, I have a 3D shape that consists of multiple boxes. What's the simplest way to join them into a single object defined ONLY by the absolutely necessary corners? In other words, I want to get rid of all unnecessary vertical and horizontal divisions on the otherwise flat surfaces. I'd prefer not to go through volumes etc, as I'd like to preserve the simplicity of the shape. Thanks.
  9. Hi all Can anyone suggest a good way to loop over geo and group connected geo by a threshold of primitive count? For eg. - I have a mesh that has 140 000 000 prims. - I can do a connectivity sop and split out connected pieces. Many are smaller than my threshold of say 10 000 000. - I'd like to combine the smaller connected pieces into a group until it hits the 10 000 000 threshold and then move onto a new group etc. Right now it creates far too many individual meshes based purely on connectivity so I'm trying to combine the smaller pieces into a more manageable chunks. Thanks in advance!
  10. Hi, I am currently creating a simulation with flip fluids that are affected by a vortex force. I need the velocity/lift attributes to be animated independently throughout the simulation, though no matter how I set the settings for either the sop geometry, or vortex force operator, the values will not change throughout the simulation. What is the proper method for animating these attributes for use in dops? Thank you,
  11. Scatter evenly/orderly/not randomly

    Example - made inside of ae with plugin Trapcode Form. Practically it's just particles evenly scattered on the sphere. Tried to practice that inside of Houdini using Scatter node, but it look noisy/with holes since it is randomly scattered. Seems like needed different approach. Thank you!
  12. Zahia Hadid Architechture

    Hi guys First post Ive been following a few tuts from entagma and would love any input on creating something closer to this. My Houdini experience has mainly been lighting for film but i want to branch out into more of the fun stuff. Any ideas? Damien
  13. Hi How do I save out all geometry information to a python numpy .npy file. I'm dabbling with a neural network that takes in a bunch of objs and spits out its so called interpretation..... But as yet I am working with just the points and not the vertices and prim information. How could I save all this information to an array so I could then reload the array back into houdini for houdini to display prims/vertices etc...... Thanks for your help
  14. Ripple Fade

    Hello, I have a ripple sim created with a sphere moving through a grid and the points deforming based on the velocity transferred to said grid. What I am trying to do is isolate the geometry based on where there are ripples via colour then as the rippled geo begins to settle back into what it was originally have that colour fade back to black. I'm halfway there I think. I was able to isolate the rippling parts of my grid by using a facet to compute its normals and then a point SOP to add colour based on the normal in it's Y (@N.y < 1). I was thinking of trying to use a vop or another point sop to make it so when the normal is between x and y multiply the color by 0.95 to get it to fade over time but was wondering what other ways I could try to do this. Cheers, JP ripple_example_1.hipnc
  15. Hey has anyone noticed how much the new interface for the polyreduce node has changed, below is pic 1: the new polyreduce interface, then pic2: is the old eone, then pic3: is what im trying to acheive but the new polyreduce node just reduces the poly but not the look of the overall objuect? can someone help please?
  16. 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.
  17. Hi guys, I have imported a very simple obj from 3ds max and I am trying to apply a curl noise effect to the surface of it... I have played around with the amplitude etc but nothing seems to create very long lines and it looks pretty awful.... (I have attached an image...) When really I want to be getting an effect like the image below my image.... does anyone know why this may be? I am wondering if it is a scale issue perhaps? I want it to stick quite close to the geometry which has long trails but does flick off the geometry every now and then like my reference image.... Any help would be great! Thanks Matty
  18. Hey guys, how can I convert every letter of a text into separate geometry at geo level? I want to make a rigid body animation and let the letters should fall on the ground. Thanks
  19. I've unpacked the geo and converted it, When I try to selected and delete or group the polys I get the error "Attempt to access and object that no longer exists in Houdini" is there a way to delete individual polygons or groups? Thanks
  20. Hallo, I have following problem: If I shatter an Object in Houdini, the smaller pieces get an inaccurate guide geometry for the collisions. The Geometry Representation Type is: Convex Hull. Does anyone know a way to make this representation accurate? Would really appreciate it, as the smaller pieces are only spinning around now... Thanks, Zac ShatterGuideGeometryTestproj.hipnc
  21. Is Geometry Selected???

    Is there any way to verify if some geometry components selected?
  22. When ever I dive into my dop network, this weird piece of geometry shows. I have no idea what it is or why it's there. You can see in the second picture I hid everything but it still shows. The last picture is what happens when I try deleting it. It doesn't show when I exit the dop network. What can cause this? It happens when ever you add a pyro solver to a rdb simulation. In my included file, go into the dop network and you will see the same problem. The last photo is what it should look like. Thanks why.hipnc
  23. Hey!!! I am trying to add smoke to a shattered statue simulation. The falling pieces will emit smoke. I want the geometry to be deleted until the pieces reaches a certain velocity (if (@v.y < ch('threshold'));) , so that the emitter geo wont appear until the geometry is actually moving. That will keep smoke from emitting while the statue isn't falling apart. Finally, I need the geometry to be deleted when it is about to hit the ground, so I guess delete by Y position. I am trying to do this in an attribute wrangle. All the pieces have their own name attribute, piece1, piece2, etc. Here is my logic so far, I just don't know how to right it in vex: if (@v.y < ch('thresholdvelocity')) or (@p.y < ch('thresholdposition') then delete that whole piece. Any help would be appreciated. I am new to vex and I am trying to learn these things on my own, but sometimes I need help : ) Thanks edit: I can't add my original scene, but I made a sample scene. delete_geo.hipnc
  24. Hello everyone,I encounter a problem, I load an object in my scene. I noticed that my shift in the viewer did focus my object, so I searched on the sidefx helpers (I link the url) "http://www.sidefx.com/docs/houdini/basics/view [www.sidefx.com] “The solution I could find was the ”space + G".He walked once.Arrived at a certain level of my work, I had to use the procedure previously done.I come to my big problem.My object disappeared, leaving room for red stripes on my node geometry. I can not find where the error came from … it is not for want of having tried yet. Do you have solutions? I link you my project and the picture of the problem.Thank you in advance Pyro Smoke_v03.hip
  25. Hey guys, I'm just getting into Houdini (have been working in comp for the past 6 years) and I need help with a most likely simple question. I have some geo in my scene that I scattered a lot of points onto. I'd like to only keep the points on the Y axis. Like imagine a camera above the character looking straight down. All the geo it sees should have points scattered on it and nowhere else. Do that make sense? Any help on this would be great! I am hoping to take these points into a particle sim and use them to drive a smoke sim. Thanks!
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