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Found 42 results

  1. So I'm making a HDA wich has a color sop inside of it, of wich Im using the group field, thats why I need to acces this field at the upper level (the HDA interface). So to to do this, when building the HDA interface I dragged that field directly from the color sop to the HDA interface, (pic1/3)but when I try to use it from the HDA it throws this error (pic2), wich I guess is referencing this code inside the group's script (pic4). I've never messed around with this kind of stuff, how can I solve this?
  2. If I have parameters on digital assets that are expressions I sometimes find it useful to have another parameter that shows the result of the expression. I can obviously middle mouse on a parameter to show the evaluated result but is there a way to show the evaluated result by default? I feel like the answer is no so my solution would be to use callbacks for any parameter that affects the expression then update the 'result' parameter as a raw string, unless anyone has a better suggestion?
  3. There are various event handlers you can use with HDA's (like onCreated, onInputChanged etc.) but I can't seem to find one that can be used as a callback for when the output connection of the HDA changes.. Basically i'm trying to create a custom version of the gas disturbance, part of which has the option to visualise the block size of the disturbance (just with coloured points on a grid). So I was thinking I would use an event handler on the HDA to know when it was connected and then in python traverse down the children to find the solver then traverse back up to find the smoke object so I can get the size and center to position the grid correctly. Is this possible? Is this a stupid idea?
  4. Hey Guys! I have a pretty newbie question about some Python and HDA interaction. So in a nutshell I'm trying to create an HDA with implemented Python script which does the following: 1. I have an Original Geo, which is object merged in my HDA. 2. I select some primitives on my original geo (or on the HDA). 3. After I selected my primitives, with a press of a button on my HDA, the selected primitives will be added to a group's pattern parameter inside my HDA. 4. And of course it would be great if this could work with a relative reference, so if I copy my HDA multiple times it'll update the groups within the correct HDA. I have this code so far: import toolutils viewer = toolutils.sceneViewer() geo = viewer.selectGeometry() s = geo.mergedSelectionString() # How can I make THIS PATH relative reference? n = hou.parm('/obj/Colorzied_Geo_Asset_1/Colorized_GEO/group1/pattern') n.set(s) I put together a pretty simple example file and the hda, which will hopefully help you guys understand what I'm trying to achieve. In case my explanation is a little confusing. selectedPrims_python_problem_v001.hip colorzied_geo_asset.hda Any help or nudge in the right direction would be greatly appreciated! Thanks in advance! Best, Laszlo
  5. Hello, I'm creating a digital asset publication system, and I want to be able to prevent artists from changing the asset's parameters outside of the system. So basically, I want my assets to be just like SideFX's digital assets, in the sense that you can't modify the Type Properties, you can only add spare parameters. But then when they use my "Modify" button, the Type Properties dialog unlocks and they can edit the base definition. Then "publishing" the asset re-locks the Type Properties. How can this be achieved? I immediately went to hou.hda.setSafeguardHDAs(), but that makes it so NO asset can be modified; I just want our custom assets to be modified through the new system. Chris
  6. Hi, there. I have some HDAs that use an external python module. I'd like to package the module into the HDAs so that external files are not necessary to use them. Currently I am embedding the python module using the “Custom Script” event handler, and I want to read file from “Extra Files” Tab. I want to write & read files from HDA's Extra Files Tab. Because I don't want to write & read files from External Directory. If I changed computer, I should move not only HDA asset but related External Files. I want to embed all files related to HDA. The Extra File is just txt file or json file. I already ask same question to sidefx forum. But, I receive some useful tips. I try HDADefinition Module but I cannot find to write in HDA. I spend about two weeks.. otl OTL Is there any way to write in the HDA's Extra Files? Link I asked same question
  7. Hi all, I'm attempting to make a new operator, and I'm still relatively new to Houdini in this regard, so every time I see this interface I am always left with some questions, as there seems to be no list in the documentation about why the operators are broken up into these 'Operator Styles' and 'Network Types', e.g. Why are these particular 'Operator Styles' the ones available? Are they presets, or are they fundamentally different in some way? Is a 'VEX Type' 'Geometry operator' different from a 'Python Type' 'Geometry operator'? And is that different from a 'Subnet Type' 'Geometry operator'? 'Python Type' is one of the Styles, but I thought all operators were implemented in Python - does this type mean something else? The documentation on the New Operator Type doesn't answer theses questions. I'm currently trying to write a particle cache exporter, so I though it needs to be an 'Output Driver Type', but if I do that the callback script option is greyed out.
  8. Is there a way to make the transform parameter on my subnet or HDA appear as a transform handle in the scene viewer?
  9. Hi Everyone, We're having a major problem at work. A couple of our artists have OBJ-level digital assets that they've created, with lots of custom parameters. These digital assets are installed in their current hip files. When we use the Operator Type Manager to copy or duplicate the asset to another directory/version up, the new asset loses all its custom parameters, even after using Save Node Type and Match Current Definition. We've tried everything we can think of, but once we try to copy or duplicate the asset, all the parameters get deleted. Has anyone else run into this? And what's the solution? Thanks, ~Chris
  10. Hey all, I am trying to import my OTL into UE4 using 15.5 (NC) using this tutorial here and when i get to the part where i bring the asset into the UE4 project all i get is the Houdini logo in the viewport. I can move the asset around but it never updates to what my asset is (a test building). Does anyone have an idea what could be causing this?
  11. Hello all, I am creating a digital asset , and want to set default values for the parameters I can set default values manually for each of the parameters but it will be very useful if there is any way to query the current values of the parameters and set that as default value,hope someone will help me.. Thanks..
  12. 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
  13. Hi guys, I remember seeing a post or thread here where a guy had an asset or some kind of "new" way of meshing flip fluids. He was able to preserve so much detail with his method/workflow. I really liked his result. iirc it was vdb based but he added something to keep almost all the isolated particles and made droplets out of them... Thing is, I can't find the post/thread anymore been reading through "all" flip/mesh threads for the last hours, searched the forums and google, youtube and vimeo but I just can't find it. So maybe someone here knows it, has a link or bookmark or whatever to help me out. Thanks and cheers
  14. Hi Is there any way to create a custom local Variable that only accesible - and altered within a node (hda)? I would like to store some data (dictionary) and access it over and over again in a node with a custom variable such as $MYVAR. Thanks
  15. Hi, When I tweak my HDA, I notices there are some variables that I assumed I can tweak dynamically such as $HDA_ICON, $HDA_TABLE_AND_NAME, $HDA_LABEL. It returns nothing if I query from textport. How can I set custom variable for my HDA, such as $STUDIO. I carry my HDAs all over the shops I am freelancing and I do not want to change the studio name (as all my tools will appear under when you press tab) every single time I move to a new studio. The environment variables does not seem to work inside type property window, even with double `` as you would expect. The same problem when I tried to assign custom icon. it seem to only take an absolute path and not respecting $HOUDINI_UI_ICON_PATH or $HOUDINI_PATH Thanks
  16. I am trying to make some hda's to help speed up and distribute my mocap cleaning process, however when I make an HDA in CHOPS I get an error saying the sub-network has no output, and when I go to edit operator type properties, sure enough the outputs are greyed out. Anyone have an idea on how to fix this?
  17. Hi, can someone help me with this: I need to make a digital asset, from an existing one (with a few changes of course) I stupidly duplicated the .otl file, with a different name, and tried to install asset library with the new duplicate file, but It show red in the install digital asset library window and modify all the node created by the original asset. I should learn more about .otl but unfortunately, I'm in a rush for a project, so If anyone can point me to the right direction ... that would be Great! thanks!
  18. Hello Is it possible somehow put images on Digital Asset UI? Put them as icons for buttons, or even just pictures as labels. QT allow to use images almost everywhere, maybe there is some QT hack fot HDA gui? thank you
  19. Hey everyone, I am in the process of creating a digital asset and its basic building block is a circle. First I have the user plot three points in 3D space. And from these 3 points which form a triangle, I am creating a circle that circumscribes this triangle. The algorithm I have so far from gathered resources are below; 1.) calculate the normal vector to the triangle formed by the three user-defined points. 2.) use a reference plane into which this triangle will rotate onto, say the XY plane 3.) rotate the three points into this reference plane after calculating and building a rotation matrix 4.) find the center of the circumscribing circle from the three points 5.) calculate the radius of the circle which is easy 6.) build the circle on the reference plane 7.) build a reverse rotation matrix to rotate the points back to the original plane I'm not sure what I am doing wrong but the code I have so far works only if the points lie on a plane in 2D space. The minute the points have values in the 3'rd dimension, it gets wonky. I'm also not sure if the rotation matrix in Houdini does the rotation about the origin or about the pivot of the three points. I can share the code to take a look at it. If anyone has any solutions or suggestions, kindly let me know! Much appreciated!
  20. Hey Guys, I wanted to ask you, if you guys know how to promote the paint handles from a paint sop in an HDA. Only found a "solution" where the user dives in the network to use the paint node. Just want to use the paint node to color a geo in order to scatter points there. If you have a solution, I would be very thankful. Cheers, Luke
  21. Hi there, I am creating folders and parms on an hda with python. The script looks for a folder name in the hda's children, then creates the same folder with the same (renamed) parms on the hda. Now I want to make relative references from the hda to the child parms. Is there a way to do that by just using the parmTemplates that I already have using the script below? I dont want to look through each parm on the nodes and match them by name. I think I would need to distinguish between parm and parmTuple and so on... In the script the hda is named test1 with one child node. The child node has a folder called 'Test Folder' containing arbitrary parms. node = hou.node('/obj/test1') assetDef = node.type().definition() ##get the first childs parmTemplateGroup and folder by name parm_group = node.children()[0].parmTemplateGroup() folder = parm_group.findFolder(('Test Folder')) ##returns FolderParmTemplate ##get all parms in folder parm_tuple = folder.parmTemplates() ##create new Folder on the asset newFolder = assetDef.addParmFolder('Test Folder') ##clone each parm, rename and add to the asset for item in parm_tuple: oldName = item.name() clone = item.clone() clone.setName('new_' + oldName) assetDef.addParmTuple(clone, ('Test Folder',))
  22. Let's say I have an asset I have created with a number of dependencies to the files system, from ready flies, to caches, to creating point clouds and a not trivial (aka linear) approach in which the asset, based on certain conditions or user selection does one thing or another. If I want to publish this assets and all its dependencies to a repository I will have to traverse this, potentially, huge network with subnetworks inside (think Chops inside Sops for example) and rewire all these paths, move files to the repository and then export the asset. My feeling is that this particular task is kind of done in the Render Pre-flight but I wonder if it is accessible and more important, is this the best way to address a more compartmentalised pipeline? How are you guys approaching this? any suggestion? thanks in advance and hope this thread becomes a source of inspiration for everybody.
  23. Hi! I'm using houdini engine with cinema 4D. I've got several C4D projects with a hda that read files. When I just click on render, my scene is rendered perfect, but when I added my project to render queue, C4D alerts me that it doesn't found my digital asset and I need to render several projects during the night and I cannot be all the time in front of the computer waiting until one project finished render to click and render the other project. Does anyone knows if there is a way to solve this?? Thanks!!
  24. Hello ! I'm not sure I'm at the right place but I would like to share an asset with you. It make a cubic projection, not revolutionary (As that exists in all others common 3D packages) but is missing in Houdini (correct me if I'm wrong). Additionally I add some options for automatic alignment inspired from the code of this author : http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&p=88114&highlight=#88114 Quick Demo : I hope you like it ! Cheers. uvcubic.zip
  25. Hey folks, New in HDA...I am seeing that I can't really move my template or copied object with maya, although freeze transform make it updated but it wont be able to animate. So I imported a tranform SOP from Houdini to HDA. It will work. But I need to see the gizmo in Maya. Any Ideas? Thanks! test.hda