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Found 118 results

  1. Hi everyone! I recently started working with the HDK and have been trying to set my project up to use an external library, but I don't have a lot of experience with dependency management in C++. It seemed to me like setting something up with a cmake file was the way to go, but I'm having a hard time figuring out the best way to set something up to work with the Houdini environment. Is this something that is even possible, or am I going about this the wrong way? Thanks!
  2. Hi guys/ladies, how can I compute a proper vector field that's tangent to any arbitrary mesh in VEX? I used the polyframe SOP but there are some inconsistencies with the vector directions and plus I'd love to know a VEX approach for creating a proper tangent field on arbitrary mesh. Thanks in advance. (I've provided a file with the mesh I'm currently working on; see attached) compute_tangent_field_HELP_01.hip
  3. I am a person who uses Houdini 18.0.499 version. As far as I know, if you press the question mark while wearing a hoodie, a help window will appear in html format. However, if you click the question mark on my computer, you can't find the page as shown below. The results came out, but I can't find the cause. How can I solve this problem? (Click the question mark)
  4. Smoke not visable

    Hi All, for my uni project created this satellite destruction. I have attached the billowy smoke pre-set to the Debris source and it does not show in viewport or render view? But as I don't have any error messages I can't figure out why it won't show... All and any help in the right direction would be appreciated as my deadline is next month! Ill attach both files above. TIA, Calan. Save.16_Smokenotworking.hip Auto_UV_sat.obj
  5. I had this problem with my own project and decided to try a simple tutorial if the same problem would occur. It is a simple fracture animation exported as fbx to unreal. This is the tutorial https://www.youtube.com/watch?v=dVgKpOYo-4Q&t=5s and the problem is in the picture. The sphere is smooth in Houdini and as soon as I import it as skeleton mesh animation in Unreal it has these low poly edges. When I import it as static object without the animation the sphere is smooth again. If anyone knows how to fix it or why this might happen, all help is appreciated.
  6. Hello I am a person who uses the 18.0.499 version of Houdini. As far as I know, if you press the question mark while using the hoodie, the help window appears in html way. However, if you tap the question mark on my computer, you can't find the page as shown in the picture below. That's the result, but I can't find the cause. How can we solve this? (Click the question mark) (result)
  7. Hi Guys, I was trying to copy an object along multiple curves. I have attached few images that show how I get these curves. What happens at the end I'm getting some curves that have flipped winding orders, this eventually changes the tangent direction. Due to which when I use copy to points sop it flips my object. Kindly share your thoughts on fixing this issue.
  8. Houdini UI Brain element

    Hello Guys, I'm here for help or advice how achive this effect. Maybe someone of you tell me how i can start. I'm newbie in houdini, but i'm very interested in how to do something like this. Link on Picture Thanks, David
  9. Hello, I'm brand new to Houdini and have been working on a "shockwave" effect and I have just looked in the Render View and there was only black screen. Then I tried to actually render it but it would still only show a black screen. I've attached some images below to show the issues that I'm having. This is my Network inside of a Geometry. This is how it looks inside Scene View. This is how it looks in the Render / Render View. Here's the project file. Please help me out if you can learning shockwave.hip Thank you.
  10. 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
  11. Flip invert mask

    Hello guys, i using the Particle Fluid Surface SOP to build the mesh of the simulation, however i need the increase the volume of mesh just at bottom of the model. i find the mask options quite usefull doing that job when i place the geometry to use as mask, the entire simulation mesh gets dilated and where is the geometry still same size (its inverted) i trying to set the dilate thing just inside the mask, but with no luck yet. thanks in advance. ps: i uploaded an basic .hip scene flrip_mesh_masl.hipnc
  12. FLIP fluid moving around object

    Hello guys i with a job that has an droplet falling into object then embracing/huggind the geometry. i using an POP curve force to guide the fluid along an line however the initial point of the curve is really close to the end point curve, while in simulation it start to stick/attract the particles promptly in the end of the track. i would like the fluid flow completly trought the curve, without it getting stuck at end of line at start. please help ps: im build an simple .hip file to explain flrip_round_object.hip
  13. Setting Default Scene File

    Hey there, So I have been looking around on various posts to try and find out how I take my template scene file and make so whenever I open a version of Houdini that template file is the one that opens. I know very little about scripting and I am not sure what I am meant to change in the 123.cmd file. Anyone ever done this and know how to set it up, please? Thanks
  14. Flat Tank Ocean Issues

    Hey I have some issues with my scene. As you can see in the image, the ocean looks strange. Also there are a lot of tiles repeating again and again, also inside the Non-Region. In this render the wave high is okay. But in other stuff it is not. You can see this here: Not only that the wave is too high (I do not find where the change this or I do not have a result inside the viewport idk), it looks like the water goes threw the ship hull, which would look weird. Any ideas on how to fix this? Edit: I also have the issue that the ocean flat tanked created the water not in the central where the ship is. I tried to fix this but nothing really work. Honestly I do not know the reason why it went this way anyway. I think Houdini is a very powerful software, but I am new to it. As always it will take some time to learn but helping me with this would really help
  15. CurlNoise + Vex Help :(

    Hi there! Houdini noob here ^^ Some days ago I found this image on the internet and I really liked it so I thought about trying to replicate it but maybe animating it hehe to me it seemed like it could be made using curl noise fields so I followed the entagma's vex 101 tutorial and I manage to make this little animation as a test, and I really liked it. I think is pretty close to the image, BUT i have 2 issues with it that i don't really know how to fix or adjust a little, so i was wondering is maybe some of you guys could help me a bit or at least guide me to the right path. https://imgur.com/a/wyg2zMS First: Looping it, is it possible to loop The curlnoise or the curlxnoise? Or is there any other noise function that would produce a similar result but easier to loop Second: Is there any way to soften the curlnoise behavior in these spots? https://imgur.com/a/rLB40Hf My best idea so far i just placing the camera in a place where these intersections aren't in frame haha but would love to know if it's possible at least to make those somewhat less dramatic? CurlNoiseTest_v1.hip
  16. So I want to recreate the blaster impact effect from the mandalorian.... Its basicly sparks with a bit of smoke (when it hits tissue, clothing or a dusty ground)... So for that I took a razor crest model and added points. With the ray node I "placed" the onto the model. To source the points I wanted to copy speheres on these points, with randomized velocities based on the normal of the part, the point is on. But I couldn't get normal of the surfaces of the specific razorcrest parts to work on the points. Which didnt work obviously, bc to transfer points attribute you need to have matching ptnums, or am I wrong? So my Question: Is there a way to copy the normal of the nearest primitive to a point? Or is there a more efficient way of doing it? Blaster_Impact_1.hipnc
  17. VAT Material Rendering Issue UE4

    Hi everyone! Sorry for the noob question but I am having some issues regarding the VAT material in UE4. I have set up everything in the engine, and the animations are playing just fine, but texture is not mapping to the objects UV map and looks very broken. In addition, the lighting seems to be broken on the objects as well. I have included some images/videos below to hopefully clarify my issues. How the textures should look (from substance painter viewport): How the object looks in engine (unlit rendering): How the object looks in engine (lit rendering): The material instance: I can provide more images/videos if they are helpful. Any help with this would be appreciated, I'm pretty stumped myself!
  18. Blood Spray/Splash Help

    Trying to create a blood splatter/squirt (more likely spray then a viscous). I've screwed around a bit with the settings adding viscosity, bounce, but it's definitely not richy quality. Just saw an tutorial outdated(houdini 12 or something) I haven't seen any tutorials really on building this. and wondered if anyone could offer any insight!
  19. Hello, I am stuck on this. I have been trying to sort points from left to right and follow the sequence. I used the sort node but it is not sorting as I want it. How can do it? Please find the image attached below
  20. How can i achieve this sim with 8 GB RAM?

    hammer flip tank hammer smash flip tank I'm trying this sim with a person walking instead of the hammer guy, but because of my specs, nvdia 940MX, i5 8th gen, it's next to impossible. So I am searching ways to do it with a low res still achieving the ripples and smashes. Also, how can I make only the legs as a deforming body? I imported fbx animation. and selecting the leg geo and clicking the shell deforming body is what I am doing. Therefore only the selected mesh is moving and the rest is staying in the initial place. I just want to achieve this sim by hook or crook. Please don't tell me to up my specs. Obviously, I can't achieve ditto but If you have any idea how I can achieve this with low specs and still not miss out on the core of the sim I would be really glad. and please do tell how to make only certain parts of an fbx animation geo as a collision object.
  21. I have an HDA with a series of preset curves that the user can switch between. This curve is taken and a revolve node is applied (this is in the top left of "model inputs," "bulb"). If I want the option to let the user draw a curve that they want, what do I do? If I simply include a blank curve, what allows the user to draw in in the HDA? And ideally, they should start drawing it at the origin like I did when making the three preset curves. lightbulbs.hdanc
  22. Help for simple tentacle effect

    Hello everyone, today i need your help for of tentacle effect. To help me explain my project to you, I am posting 4 images. I would like an object to approach a sphere. When it is at a certain distance from the sphere, the tentacles (very simple, not necessarily like an octopus) leave the sphere and approach the object. She poses on it but does not try to surround it. The object continues its trajectory towards the sphere and the tentacles accompany it. The object is then absorbed by the sphere. I think the effect is possible to create in a very simple way but I would like to have your ideas as well. I told myself that an extruded curve to make the tentacles and animated towards the object then which retracts at the same time as it could be an idea. But I'm sure others will have more ideas. thank you in advance for your help
  23. Help with Grains & RBD's (beginner)

    Hello, My issue I am facing is getting geometry(mushrooms) to interact with grains (soil). I've tried setting the geometry to a RBD hero object and the grains as collision geometry however this is not working. Any solutions would be greatly appreciated thanks:) Mushrooms.hipnc
  24. Vellum hair thickness problem

    Hi, I'm trying to make some thick tubes with vellum hair. Later with redshift i'll render the splines as tubes. So far everything works, but when i specify the thickness of the hair, i realize that the actual collisions are not as thick as i want. If i activate the visualization, they look as they should in the first frame, but as soon i start the simualtion the thickness collision shrinks down, so when i render the splines with my desired thickness, there are intersections. Can you help me with this one? Thanks! They look properly in the first frame They look like this after simulation has started
  25. Hi everybody, I'm a newbie here, I just discovered this Houdini forum today! Just to precise, I'm learning since only 4 months, it's an incredible 3d software but a little bit complex at the beginning... I've an unexpected problem: I've a rigid body simulation stored on my hdd where all are okay for me, and now I want to make the textures, but the DOPimport node keep the colors that were used during object creation!! You can watch it in the screenshot. Please, how can I change the color after the DOPimport node, or maybe how to keep the color of the Assemble node? (I'm working for a render with Mantra) Many (many!) thanks in advance for your tips/answers!
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