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Found 29 results

  1. I'm trying to make the geometries attached to a sphere (using the "copy to points") to change it's Base Color considering the texture color of the sphere's surface. I've already tried "attribute from map" using the same sphere's texture but the colors are not in the same position.
  2. Hey all, Ive been following a tutorial on how to transfer the UV's to simulated flip fluid and all was going well untill I added a remesh node to the transferred UV attribute which was supposed to smooth out the mesh to preserve the detail of the texture. Instead what has happened is that the UV's have gone from being seperate shells to having all their edges connected together. There is already a vertex split in the node graph which fixed the issue before I added the remesh node. Any help would be greatly appreciated, I've provided the scene file - thanks a bunch Melting_Example_v001.hiplc
  3. Hi I'm trying to add up deformation from 2 animated objects (or rather, same object with 2 animations, so the topology is the same). I've been reading up on this but wasn't able to find anything. I was wondering wether anyone had an idea how would you go about this? My only guess is matricies, but I haven't used them in quite a while and would probably start learning over, so to avoid unnecessary time sink I wanted to ask wether someone did this with matricies succesfully? Hopefully its pretty clear what I'm trying to achieve, but if not I found this post which describes the same problem and has example file with the issue in question.
  4. I'm not sure if my workflow is incorrect but I have found something a little odd with transferring groups with the Assemble SOP. I was doing a sim and needed to use the rbdconfigure to set the active area. After that node however, some of my primitive groups I use to texture were either empty or had the wrong amount of primitives in them. I googled around and found that most solutions were to make sure the Assemble SOP was transferring the groups. However the only thing that got it to work was to make sure the Transfer Groups field was completely empty... I had to unlock the rbdconfigure HDA and clear the fields. Now I have all my groups and everything is working fine... As I said, not sure if I did something wrong further up the chain but maybe this is a bit of a PSA for anyone finding a similar issue.
  5. Hi guys, Im a little stumped on a vex issue im having whilst trying to utilize the nearpoints function when building an array. The idea is that i have multiple curves, each with different colour values, which i group the end points of and then run a function which gathers all the nearest points to each of these endpoints and assigns them to an array. (this is currently working as can be seen in my spreadsheet.) However, i then wish to take this array that has been created for each of the endpoints and run an if statement through it that says if the points in the array have a different colour value to the end point they belong to then add them to a group. Im then hoping to perform a nearpoint function using this group as a filter to get the nearest point that belongs to any curve other than itself. Im unfortunately having an issue with this if statement as it seems to only output points 0-9 regardless of the previous rules set in the code. Help is really appreciated as im truly stumped on this one. Thanks in advance guys! Nearest_Points_Array_Problem.hip
  6. Why is my Color Transfer Offset?

    Hi Guys, Im trying to achieve this stepped layering effect on my mesh and figured the correct approach woould be to use a shatter boolean with multiple cubes (which i have colored differently) and then transfer my Cd attributes across however although i am getting the hoirzontal cuts across my mesh in the correct place as intended, the color transfer is offset (almost as if my exactly half of the original cubes height) Why is this occuring / how can i make sure the color transfer occurs only between the cut lines ? Thank you
  7. Hi; Is it possible to transfer colors from geometry's material to points? I found this thread: https://www.sidefx.com/forum/topic/12562/ But I want to get texture from any input geometry, procedurally. Thanks.
  8. I'm having a problem with a RBD simulation. I followed Applied Houdini Rigids 3 for the setup and everything finally worked. Now I would like to work on an actual scene, using an animated alembic instead of animating in houdini with a null. But I can't see what to change or to adapt in the setup to get Houdini to read this animation and make the switch to physics work like in the original setup. Importing my abc and switching every cache to store a frame range instead of a single one might mess with the constraint system, any ideas?
  9. Hi all I am trying to figure out how to do transfer of uvs (with correct seams) from low poly geometry to hi. Example workflow (works for me in Maya) and to the point I’m stuck in Houdini. Take hi res 3D scan > do poly reduce (gets low poly) > do auto uv > transfer UV to high poly. now this for me works all the way to attribute transfer (vertex uv) but uv edges (seams) are not transferred. I tried transferring uv_seams edge group (and it works to some point) but just can’t get those clean UV islands as in low poly. I must be missing something simple but I can’t figure it out. thanks for help
  10. Hi, This is giving me headaches for two hours now.I know it would be much easier in vex,however I dont know how to achieve this effect. If anyone can please point me in the right direction that would be greatly appreciated! There are some arrows shoot into ground in this scene,I want to make some small crushed stones in the first catch point. But the question is how i can get the one primitive source in just one frame? Transfer color is the best way i can think whitin my all power. Let me show you some GIF shot204.hip
  11. Hello everyone, I am new to houdini, and I am trying to do something I think should be simple, but I can't wrap my head around how to set it up correctly so that it works. I want to transfer a point attribute from points generated on a source mesh, back onto set mesh or ideally into a redshift shader (RS_material) to control the opacity. I am trying to use the super cool tutorial below, and use the points generated to drive the reveal of a mesh through the use of the opacity channel in the redshift shader. I can't seem to understand how to set this up so that the parts that need to see each other can, and do I need to convert the attribute into something that can go from 0 - 1 and / black to white? I'm just a bit lost and im sure I over complicate things, so if anyone would please just point me in the right direction at least, it would be much appreciated. Like what is the general basic order I should of this? mesh - generate points - I can see the attribute in my geo-sheet but now what? attribute transfer I can't seem to use correctly Thank youuu !!!
  12. Hey guys, i have an alembic animated file (there's no deformation) and I have to convert this object to a vdb mesh (vdb from polygons >> convert vdb). I did it on a static frame (using timeshift) and now i'd like to copy the original animation to this new mesh. A copystamp does copy the position but not the rotation. Can you guys help me with this? Just to make things clearer (this is not the original scene, i'm kinda faking it so i can share here) this is the alembic character animated: then I made this new mesh from it: i need to transfer the position and orientation from the first one to the second one. I guess i could make it with a packed object since it have just one point Thx! RnD_copy.tansformation.v1.01.hiplc
  13. Hello Guys. I got stuck here in a middle of an project and i can't find a solution. My problem is : I have a grid of points , and an animated point running over the surface of the grid. My "running" point have an attribute that is transferd ( via attrib transfer SOP inside anSolver) to the grid points by an proximity radius. then I use the transfered attribute to isolate only the grid points that are tuched by the "running"point. But the @ptnum of the remaining points is changing. And i need the @ptnum to grow in the order detection ( @ptnum 1, 2, 3, 4, 5 etc) why is that happening to understand better I've attached the scene file ptnum_chaos.hip
  14. So I have been stuck on this issues for several days now, all the google links to similar issues have long since become purple. Two nice members of the Houdini discord tried helping me, yet i still can't seem to get this to work. I am working on a game that has quite a few pipes. So an optimized pipe building tool is simply a must for us. I can get the geometry generated perfectly fine, but am having an issue with optimizing it without severe uv stretching. This issue occurs from removing inline points with the facet node on the original path curve. I am trying to transfer the UV map from the hi poly: http://imgur.com/qMP3XGg onto the low poly. http://imgur.com/6zx2Nnx I would prefer to stay away from sweeping. I understand sweeping gives very nice uvs, but this is a branching curve and the branches wont connect like polywire. Using boolean on the intersecting geometry gives less desirable geometry and messes up swept uvs. http://imgur.com/CvbR631 It doesn't necessarily need to be uved like this to begin with. If I can find another way of uv mapping it from the "Path_Fused" node I would be just as pleased. File Included Branch Subnetwork_v1.hip
  15. Hello magicians, I've been struggling with this all the morning, reading on forums and trying different stuff (att transfer, att promote, att interpolate, p deform) with no luck. I'm studying a file done by Ian Farnsworth , a awesome growth effect done with vdbs and curvature/gradient calculation. Now I'm trying to add a texture that sticks on the deformed sim, coming from a solver sop, but the texture doesnt stick. it keeps on the same space, I need to do this in order to texture properly in C4d (octane) http://i.imgur.com/mPryDKP.gifv File by Ian: http://fx-td.com/content/misc/recursive_growth_v2.hiplc Any help will be really appreciated. Thanks!
  16. Hi guys, I was wondering if any of you could help me solve the following issue: I have one animated object (polygons). I am trying to create a deformation on it's rest position and apply it back to the animated object so that I can have more control on that deformation. So far, I have tried two different approaches: 1. Calculate de point difference in the deformed rest position and transfer it to the animated object using an attribute reorient node. It kind of works but it changes the transfered deformation too much. 2.Using matrices to transfer the deformation. I have tried it without success. I know how to export the translation/rotation/scale but I don´t know exactly what to do with it. Does anyone knows any way of transfering the deformation from the deformed rest position to the animated position? Could anybody explain how to apply the matrix translation/rotation/scale into the animated object? I would appreciate some help on this issue because it´s beginning to drive me crazy!! Thanks!! transferDisplacement_01.hip
  17. Hi there, I am trying to build a propagation driven blend / morph effect to change the look of a geometry. But I am already stuck by transfering the atrributes between the geo A and geo B. I managed to build a set up where I change the geometry by using a attribute vop and subtracting B minus A. Here come the BUTs couldn´t animate it by keyframing the Bias of a mix node. couldn´t use a propagation effect with scattert points In the second set up I tried to change the set up by using a scatter node insted of the normal geometry. It works but it seems that the point order isn´t the same and while changing the bias of the mix node all the points change it´s position?! In the scatter node I unchecked "Rondomize Point Order" but without any effect. I also tried to use set up with the change from lowres mesh to a highres mesh, but here I couldn´t get solution with the scattered point, because of the primitive Attribute node in the second Vop. I also tried to recreate it with point cloud node but failed as always. I am pretty new to Houdini and I know that I am missing a lot of foundation knowledge, it would be great if someone could give me a hint what I am doing wrong. Thanks and all the best Dennis 170422_position_transfer_001.hiplc
  18. Hello!, I'm creating an attributte to group only the tips of this extrusions ...I used the front group that polyextrude creates to transfer an attribute to the root.. it's working so far buut the problem is those areas where the attribute of some tips gets to other nearby tips ... I could put a smaller blend value but still for thos tips that are to near I get this problems, of course I understand that the attributte transer is just creating a blend radius without any topology consideration... I was trying to look for some technique to transfer attributte to points that are topological connected, without any luck so far. any ideas?
  19. Hello guys, i think this is a peculiar problem I have to "fuse" 2 meshes and VDB looks just perfect for the job. The 1st mesh is an orange (alembic) and it have some perfect UVs. What I did is a simple vdb setup to combine the 2 meshes + an attribute transfer to get the uvs from the orange but, unfortunatelly, it looks like some of the polygons are still connected in some parts where it shouldn't be. Does anyone knows a solution for this? I can't share the original scene so I've recreated it in a simple way. The original one have a face to mix with the orange. here's the images + scene file (with abc) in case someone can have a look at it Thx again, Alvaro UVs Transfer Problem.rar
  20. 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
  21. Hi, does anybody have experience with exporting ASS files from houdini to render them in Maya and preserve instancing? Now htoa seems to bake-in instances and ASS files are huge, instancing is apparently not preserved. Any ideas? Thanks, Juraj
  22. hi there!! I've melted an object using flip fluid solver and I was wondering if there is a way to apply a "low" sim resolution to the "high" (original) mesh. In another project using vdb fracture I could be able to apply the low sim to the original mesh by connecting the original geometry into the second input of convert vdb node and checking "transfer surface attributes", but I don't know why this method doesn't works for me for my flip fluid simulation. If it helps in this video: https://vimeo.com/85149964 The person who upload it, comments this: "I cheated a bit by wrapping the low res simulation to my high res geometry " Can anyone help me?? Thanks!!!
  23. Cd Attribute Transfer Query

    Hi How could I transfer a Cd attribute along an OBJ such as a pipe. I'm new and one way I know is using another OBJ as a mask Basic Example GIF https://gyazo.com/912405a45452c308514db0ce5da4e64c How could this be done evenly on something more complex whether its a pipe or a detailed mesh. Thanks guys
  24. Hi, first of all sorry if this has already been asked. I'm advecting some particles from a pyro sim. I would like to transfer some attributes from the pyro sim to the pop sim, like density, color, other... I have to use the gasfieldtoparticle node if I'm correct, but I cannot set it up correctly. Here is my DOP network I don't really know the correct way to use this node, could you please enlighten me ? [another question out of topic, do you use win10 on a work machine and do you recommend it?] thanks a lot!
  25. Hi everyone, as the title says: I am importing a digital asset into Maya with Houdini Engine and, while everything seems to work kinda ok, the UVs are somehow different (and wrong) in Maya. I can't post the original scene for it is a production scene but basically I just have a bunch of tubes with polycaps and their relative UVs. I've attached a self explenatory image. Does anybody knows why is this happening?If so how can I fix it? Thanks everyone Cheers
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