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Search the Community: Showing results for tags 'curves'.

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Found 16 results

  1. Hey, I would ideally like to have this all happen in Vex rather than the set I have made here. This would allow it to be more scalable, but perhaps I can save that for my next problem. Right now I am wondering how I go about recreating the curve I have outlined in pink on the image? Any ideas would be a big help as I'm really stuck. Thanks Metaball Arc_Circles_A_01.hip
  2. Hello Guys, I am wondering if anyone can help me get my head around a little problem. I have a subdivided mesh being generated with a for each loop, similar to the Entagma setup, with an ends sop set to unroll. I would like to select a point on said mesh then have each point draw a line to its subsequent neighbour, repeating this processes until the whole mesh is formed...creating a kind of growth effect. I would also like to add some randomness to the speed of the connection on a per point basis. Now I have tried to achieve this a few different ways but I just can't seem to pull this off. Any help will be greatly appreciated. Thanks, Clive Growing_lines_between_points.hipnc
  3. Houdini FX artist specializing with hair and curves generations is needed for on-site contractor work in the Silicon Valley / Los Angeles area. Must have the ability to work within a VRay/Maya pipeline and create, rig and control intricate patterns like below: https://vimeo.com/59736707 Please send demo reel and examples to: joelangmuir@gmail.com and I will forward to my manager and recruiting.
  4. I want to jack the streamer visualizations from my fluid source and use it to extrude shapes along. Is this doable? I want to do this because of how cleanly the streamer lines are distributed within a volume.
  5. Hi! I'm following a tutorial and I found somthing rather annoying, in the video when the user sets alpha to be zero the curves (NURBS) go totally transparent but if I do the same I can see how the Alpha is going down but when it gets to zero the curves go full bright color, if I go until something like 0.001 it shows as expected (almost 0 visibility) all of this in the working viewport. I guess it is a display preference or something like that but I failed looking up for that toggle. Hope that anyone knows what is happening. Pardon my bad english and Thanks!
  6. Hello dear community, I'd like to build a simple HDA that lets me build a street from a curve. I'd like to have it configured in a way, that I get the same controls as we get for the Curve-Shelftool. I already found a handle called "curvepointoptions" which only lets me modify existing points. However, what I am trying to do, is to start from a blank state with all the options. Can anybody tell me how to properly setup such a tool? I already dug into the documentation, but I still can't make any sense of it. All the best, Nicolas
  7. 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
  8. Hey guys, Kinda Intermediate at Houdini and a recent full time convert from the 3DSMAX/TP world. I have been working on a tool, where the user can easily plug-in curves and generate art direct able particle flow along the input curves. Its about 90% done, and it works great with curves that are not too close to each other or don't intersect each other at too many points. How ever in certain scenarios. like multiple inward spiral curves intersecting each other, since the POPVOP system is based on Particle Cloud Search : - PC Open to look for particles close to the curve points. - Use those points and push them along the length of the curve using the curve tangents. , the particles get attracted towards either curve based on the search radius and no. of search points. This is definitely understandable, on why its happening. But is there any way to lock/tie the particles to specific curves only? The Radius and No. of Points parameters give it a lot of control for most scenarios, but the one mentioned above. Obviously there are a lot more parameters that i have added for dictating the flow behaviour. But the main solution that i can think of is to have the “found” particle only follow the curve and be affected by the parameters along that curve ONLY. Maybe have a POPVOP decide groups for the curves/particles? TLDR; Need to make the particles only flow along the curve it chooses/gets attracted to at the beginning. I have never worked with groups in POPNET, so im pretty much lost. Unfortunately because of my limited knowledge at Houdini i haven't been able to figure out how to achieve this. Would really appreciate some help on this.
  9. Hello everyone. I am working on a growing vines effect with the use of L-system. I want my L-system to be deformed by the curve and controlled with carve SOP. I have set up the initial network, however the main problem I encounter is the fact that the leaves anchor points are deformed in the way that it doesn't match the L-system branches. (see the screengrabs) Non-deformed L-system Deformed L-system with non-matching leaves I attached my hip file, any help would be appreciated: growing_lsystem_vines_01.hipnc
  10. How can I create geometry between 2 curves?
  11. Hi there, could I pick your brain about what would be the best approach, or even a working approach to achieve this: I need to punch a bunch of holes (square shaped) into a box (red square in the picture). A large box 250meter side and 2 meters height, I mention the size of it because I tried to use vdbs to achieve this, but since I need accurate results, the vdb approach is just not working with such a difference in the dimensions (250x250x2) (or could it?). Also, the holes are overlapping (see picture attached) In other 3d applications, I would work it on a curve level and then extrude it, but I just can't find a way to do that in Houdini :/ At least not procedurally. I need it procedural, as the holes are placed on points via a copySOP, and they will eventually change. I'm attaching a hip file to better expose my goal. Thanks in advance overlapping_holes.hipnc
  12. Hi, I've started a thread in rendering about a shadow pb : http://forums.odforce.net/topic/25244-wrong-shadow/ seems like the pb is in the model, so I'm looking for modelling help here. 1- what is wrong with how I made the wall ? cookied curves + ployextrude. Is there a better way ? A better way to combine curves maybe ? 2- I need the opposite wall, with the copy SOP I made a reflected copy (scale -1 on 2 axis) The resulting geo is all normals inside, and still have the shadow problem. Renders as weird as the original wall. 3- What would be the best way to control/flip my normals? I saw somewhere a simple VEX line in a pointwrangle or attribwrangler, but I can figure out where I saw that. The reverse node doesn't seem to reflect the change in the viewport (but affect the render). Thanks for your time, on any or all points. <- could write that in vex? here is the hip file: shadow-pb.hipnc
  13. I'm building a crowd simulation system by creating custom VEX operators being cooked in a SOP simulation. Along with implementing basic behaviours(arrive,separation,cohesion,alignment,obstacle-avoidance,wander,leader following etc.) by manipulating point positions being accessed from the amazing Houdini point cloud feature, I'm working on a path-following behaviour. I'd like the user to be able to define his own path, a curve rather(as I'm using a curve to define a path), is there anyway I can make my digital asset user-driven, wherein the user can have an option to simply draw up the curve on the grid? If I found nothing, I would let the user load up an image file with a path drawn on it, and let that form the path to be followed, but I'd have to somehow scatter points(after tracing it) in such a way that they form path-like connected line-segments(even if they might not be curves, it'll still work if I can simply get to access the points forming the line-segments of the path). But I'm sure someone can come up with a far better solution than that, really looking forward to it! (It's eating the insides of my brain now!!) Thanks! Cheers
  14. While I'm not new to 3D animation (been using 3DSMax off and on since it was in v5 way back) I am entirely new to Houdini. I have a plug in that creates an animated mesh along the length of a spline and, while I get it to work, animate and render out just fine, for some reason I can NOT get the base spline it follows to animate and I to be able to get the effect to work, I need to be able to animate the vertices of the spline. Auto-key and manually setting keyframes hasn't worked, but works for other things like mesh objects and what have you. I'm currently using Houdini FX v.12.5.316.22, if that helps. Does Houdini, for some reason, not allow the animation of splines? I'd find that a little hard to believe... can anyone help?
  15. Hi guys, Fresh meat here with what is probably a simply question. I'll get to the point: I want to make these lines, the intersection i mean (disregard the "detail" image. I got it out of my reference material): I have some lines intersecting and i want to add curves to create the round fillets in between. They don't always intersect at 90 degrees. I tried just slicing up a circle and placing it at the intersection but i was unable to make it work reliably enough. There must be some easy way to do this. Some node i have forgotten about or never knew in the first place. Maybe copy the lines and convert them to NURBSs? Any suggestions?
  16. Hello! I have a tiny question about Houdini, writing to you because I do not know anyone more versed in this wonderful program. I hope you find a moment what would help me. when creating a normal curve in the viewport I displayed only point on which I want to billeting curve is terribly inconvenient. tell me how to display a line between points ?