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Showing results for tags 'geo'.
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Hi all I have been working in my project for a few days now but i have just noticed that all new geometry i add, are missing uvs (even if they are new ones) - I am also getting the orange error at the bottom and I have no idea how to fix this? When I open a brand new object everything works fine when i chuck a uv quick shade on but i'd like to be able to understand why it's happening in my current project.
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Hello ODFORCE community! First time around here and I hope you can help me with a rather simple(?) case of referencing an attribute to a node. So my situation is the following: I'm trying to feed a number of pre-made curves (from Illustrator) into a File node. In order to do so, I thought I could build a string array in an attribute (detail) wrangle, with the paths to the .ai files, and then extract each file path by feeding a chi() to select each array item. So far so good. What I've noticed is that File nodes don't store data. Is that correct? I connected the attrib wrangle and I couldn't see any attributes (I tested on other node in case was a coding mistake, but they worked fine). So... that's when I land in this question of how to import data in the file path of a File node (Geometry File is the name). I attach 3 snapshots. One with the mentioned nodes,a second one with the array (I've only included one file path xD, just testing) and a last one with the error showed in the File node. I tried adding the "`" "to_feed" is the attribute wrangle "ref_string" the attribute "0" as... I'm retriving the the index = 0 of the array? That one I don't have it clear Anyways, doesn't work : / Is there a way to make it work? Can I retrieve a non-connected attribute into a File node geo path? Alternatives? Thanks in advance!
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Is there a way to dynamically add geometry to a vellum solver? I have a situation where I'm generating new patches of geometry every ten frames. The vellum solver is only solving for the first patch, but not picking up the rest. The newly created geo is showing up in the vellum configure node, but not the solver. Any ideas? Many thanks! -max
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Is there a way to dynamically add geometry to a vellum solver? I have a situation where I'm generating new patches of geometry every ten frames. The vellum solver is only solving for the first patch, but not picking up the rest. The newly created geo is showing up in the vellum configure node, but not the solver. Any ideas? Many thanks! -max
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Hi guys, I have a pig head which I have sliced and packed, I am trying to randomize the color of each chunk by using a attribute random on the Cd, and a color node with a ramp from attribute after. The problem is that the color node doesn't assign the new colors to each chunk of the pighead, it mostly "overlays" it. Thanks! frac.hip
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Hello Everybody, I have spend my last week to understand the process of UV's/UDIM, and... check a lot of forum to find a solution to my problem... and nothing. I have a 3D Model of a puppet (3D Sculpting) import in Houdini in different object (Eyes, arms, legs.. etc). Very basic. I grouped each part and merge them. I worked on the UV. Mainly with "UV Flatten" nodes, and some AutoUV. I finish this part (not.. the most accurate work but.. this is for the idea) And i placed a UVLayout. Fixed Scale, UDIM activated. Perfect. But.. One thing i don't understand is.. : How can i say to "UVLayout" node, to make UDIM island for Legs, arms, eyes, etc.. ? 'Cause actually, for example, my UDIM 1001 have a one leg, and one arm. UDIM 1002 have the eyes, and one ear, etc... I tried to play with the Columns or Scale too. So.. i can use this to paint them into substance for example. it works. But once i want to re-import my texture (base color, normal, etc..) into my houdini material node... it's not working the way i want. For sure.. If i import my UDIM1001 in my material node, for the LEG Group, my arms will be affected too. So.. i thought.. If i try to make ONE UDIM ISLAND per Object (Legs, arms, etc) .. I can paint, and re-import my material into houdini, per group, without any problem.. I hope i'm clear. I think i don't use the right way to do this. Here's is my .HIPLC project under if you want to check and if it can help. Thank you! Main_Character.hiplc
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I want to apply a “dirt mask” only in part of my geometry considering its position (P.y) for that. Let’s say I have a 3 meters cube, I want to get a black color in the geometry part below 2 meters and a White color to the last meter. "Rest Position" and "Global Variables" are not working because they are considering the camera position and not the one from geometry. -
Hey, Trying to workout a good asset workflow coming from Maya to Houdini. Geometry wise we are using Alembic and I'd like to add an attribute in Maya (or similar method) to define what materials are assigned to what geometry (shape assignment, never face assignment). Then in houdini use that attribute to assign materials to the alembic cache. So far I've managed to add a string attr to the shape nodes in Maya and export that into houdini fine. Once the alembic is unpacked I can see the attributes there. I cant seem to get those prim attributes to be used in the material node downstream though, as you could do with groups for instance. Any tips would be much appreciated, or other workflows that could be better. Cheers
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Hey magicians, I'm having some issues adding vellum hair to a moving geo. I tried using hair generate, and a for each loop to pin point 0, but for any reason the hairs go crazy. Simulated mesh also has static points (used point deform), so not sure what is causing this. I also tried scattering points on the animated mesh, but hairgen doesn't work when I select "per point", is this a bug in 18.0.416? I have normals on the points, but nothing appear. I believe I solved similar before using hairgen on scattered points. I also selected "match animation", when is not selected, hairs fall correctly, but when I try to make follow the moving points, constraints seems to go crazy: Any thoughts? Thanks!
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Howdy team. I'm new to the forum, so apologies if this is a daft question. I am following a FXPhD tutorial which has an old vers of Houdini and the nodes and parameters are sometimes different. In the exercise I'm doing, the tutor is copying some curves onto a grid mesh to make grass. He manipulates them, copies the curves to attach to the grid mesh with a copy to Geo node, then scatters them across the grid using a scatter Node. There is some scripting to alter the grass length etc. But the grid mesh Geo disappears. We can only see the grass. He gets the Geo to reappear again by checking the preserve Geo tick box in the scatter Node. This box isn't in my vers of Houdini, which is a current one. Does anyone know a fix to this problem? With mesh Geo disappearing when using a copy and scatter node to copy curves to mesh? TIn other words, the curves are grass and the grid mesh is the ground. The ground disappears and I don't know how to get it back. Any help appreciated. I'm a beginner. Thanks.
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Hey, I simulated low res RBD pieces and am using a transform Pieces node to apply the position / rotation back onto the highres geo. To get the orientation / pivot for the template points input of the transform pieces node I used a "dop import" node which is set to create points to represent objects. But I had to bake out the RBD objects and animate on top of em in Maya and brought em back to houdini. I made sure the name attribute is exactly the same as on the highres geo again and packed it and currently just using an attribute wrangle to delete all prims so I only have points left. But those only come with P and name. How can I get the correct orientation / pivot back to align my highres geo correctly using the Transform Pieces node? Thanks guys!
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Hey there! Okay so I have got a grasp of how a heightfield works but what I am trying to do is confusing me. I have the sole of a shoe and on one surface I want it to have the heightfield on. How do I merge the heightfield with the surface? I have used the project node but I still get the square. I also used attributes from volume and then a point wrangle to transfer the height to the Y position but It affects the whole of the geo. I need help! Mountain_Duality_Sole.hip
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I can't seem to figure it out. The bricks won't render with motion blur no matter what I change. I unpacked them and checked if they have velocity vectors and they do. Also, there is motion blur if I hit the render points as spheres option in the redshift obj tab. I hope someone can help me out here
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Hello, Looking to make a similar effect http://www.tokeru.com/cgwiki/?title=Houdini#Unfolding_polys However, currently the effects works on faces (per-face) Is it possible to achieve the same but on islands or name attribute instead of face? Basically, the desired effect would be to unfold based on the color marked islands/groups. any suggestions or help please. Ipad_Cut.hipnc
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Hi so Im stuck here... I have this basic setup, with ready to go agent its work well.. I now need to switch Agent geo to a custom "Fatty" one.. So I bind it to a joints from agent setup, "baked agend" but it looks like whole new geo is binded to just a root joint... Cant figure it out. H17 B. Custom_Agent_Help.zip
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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
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Long story short, I have Prim_IDs written into a 32bit exr channel. I want to be able to delete geo primitives that do not show up in that EXR channel. I'm still a noob so any tips would be appreciated no matter how high level. Is it even possible to index all the render-present Prim_Ids and then translate them into an index that SOPs or VEX can operate on? Note: I had built a pretty cool set up that did traces from points on each primitive back back to the camera, but in order to avoid false positives and negatives without an absurd number of traces I thought the raster solution would be worth it.
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I have two separate stacks of geo made using copySOP's, i am trying to get them to interact with each other. They do interact with each other but the constrains only effect one model, i can switch them in the merge but its only ever one that holds together, the other falls apart instantly no matter what the glue strength is. Ive put photos below and attached the scene file with the model that needs referencing in. New to Houdini so any help or advise would be greatly appreciated! Thanks PlateSimulationTest001.hipnc plate.obj
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I Have stacks of plates and bowls that i made with a copy node on one original model of each type of plate or bowl rather than importing each model multiple times. I want each object to be able to fall and smash independently which i am struggling to work out. When i make the stack a RBD Glued Object it either all moves and smashes the exact same way like they are being read as one whole piece rather than individual plates/bowls or they move individually but the glue errors saying "making objects from different solvers mutual affectors" so they cant smash. Sorry if this is a basic question i am new to Houdini, any help would be greatly appreciated!
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Hey guys, working on a destruction shot which will involve a dragon thats being animated currently landing and somewhat destroying the building i have - Did tests with dropping spheres etc to get the constraints as i wished, then brought in a very rough 'previs' level peice of animation of the dragon i did - and as you will see from what i provide it doesnt collide correctly - i have tried increasing substeps - my collision volume matches my mesh almost perfectly, so really unsure what the issue maybe? Any help would be great (alembic and hip file below) and the youtube video link is to the latest flipbook i have showing the issue (please excuse my terrible dragon previs animation) Destruction_v2_t1.hip dragon_previs.abc -
hi everyone got a little problem here - i've setup a ragdoll system for my crowd... i've animated a door in maya that opens up and that was exported from maya via alembic. the prob is as the characters run towards the door they sort of collide around a bounding box and i cant figure out why? has anyone encountered this? Its really pickling my head - they are clearly hitting a bounding box of the opening doors I'm afraid i cant send a scene either anyone any ideas? thanks ant
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Hello! I'm encountering a little problem with Pyro Fx. When I export a geo file from any fire, the attributes of heat, temperature and fuel look good in the viewport but when I render them, I get a particles cube. It seems that those attributes are not exported in my bgeo files (I tried with Vdb files and got the same result). Is it a bug or is there a step that I missed in the export? Thank you!
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Hi everyone, I have a little problem with a mesh (splatter snow), where in some areas, it just doesn't render the proper shader and it's just black (black particles). Any ideas of what that could be? It is no the shader, because even if I render a frame with emission to 1 the rdr still shows black spots. Cheers amigos.
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Hi, Im working on a desert scene with a dust cloud blowing over some nice sand dunes geo. No matter what I do the pyro keeps clipping straight through the geo. The weird thing is this did happen with particles. Heres some of the things I've tried: Selecting the geo and making it a Static Object, Selecting the geo and making it a Terrain Object, Ticking the Use Deforming Geometry box, Ticking the Create Active Object box, Unticking the 'Use Volume Based Collision Detection' in the Collisions/RBD Solver tab. Changing Offset Surface from 0 to 1, 2 or 3. Im guessing there are some nodes that I will need to work with and connect up in order to produce a better collision but I do not know where to start. Any help appreciated, Thankyou Charlie
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Hey guys, I assume that the best workflow could be: 1st - Write the particles simulation to disk 2nd - Read the simulation files to generate the mesh (+ cache the geo file) Now, what is the best way to save the particles simulation? Should I do it inside the "particle_fluid" node using a "ROP Output Driver" or a "Flie" node? Should it be connected to the "import_particle" node? Something like this: and how should I read those particle files back? Please let me know if there's a better workflow on it. Thank you, Alvaro
