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Showing results for tags 'script'.
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Hello to everyone! I'm creating this topic just to see if someone is able to break down the remesh node in VEX. The point is to achieve a faster result using a wrangler or more as a substitution for the remesh or polyreduce. So here you have some questions: 1. Is it better to use the original mesh (deleting and modifying the mesh) or creating a new one (generating points)? 2. Is the source code used in the remesh node faster than any script that could be written in VEX? If you find a way or you have an idea about how to do it, don't hesitate to share it with the community!
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Hey guys, I try to modify a few items in the OPmenu (the menu triggered when right-clicking on nodes). I want to modify the expressions that enable certain items, for example disabling the Type Properties... for specific nodes. Following the documentation, I came up with the following xml file that is in a directory in the HOUDINIPATH <?xml version="1.0" encoding="UTF-8"?> <menuDocument> <menu> <modifyItem id="opmenu.properties"> <context> <expression><![CDATA[ # some example python code to evaluate an expression expression = node.type().name() == "custom_nodetype_name" return expression ]]></expression> </context> </modifyItem> </menu> </menuDocument> And Houdini returns an error when firing the menu, telling it cannot find element "opmenu.properties". I tried with other items I've found in the "internal" OPmenu.xml file, and I keep having the same error. Anyone has any hints on this ?
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Hi! This is my first post to this wonderful forum, my teacher recommended it to me since I'm the only one in my CG-course to want to work with Houdini and the autodidactic approach can be harsh sometimes I was following the classic "vex isn't scary"-tutorial on for loops and decided I wanted to try to make the "infected" points also move into a new position within the foreach-loop after they've become infected, which worked fine. But then I tried to create a float parameter that blended the initial position of each point and the new position, so that you are able to see them moving towards the center as they became infected, and got completely lost in the sauce. Anyone know how to write that in VEX? I attached the file with directions. Looking forward to spending time within this community, you guys are awesome! FORLOOPS_VEX.hipnc
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I have an HDA with a parameter that allows users to return a selection from the viewport (same type of parameter used on blast nodes etc.). I have a callback script that I want to run whenever the artist makes a selection, however, the script only seems to execute when the string portion of the parameter is edited. For example if I manually type the name of an object into the parameter the callback script executes as expected, but if I use the arrow button to select the objects in the viewport and hit enter to confirm my selection the callback script is not executed. This obviously isn't very useful or intuitive for artists. Does anyone have any workarounds or suggestions on how to get this functioning the way one would expect it to?
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How could i add a sop to every geometry node inside a subnet with a complex hierarchy (multiple subnet inside subnet inside subnet etc...talking about non repeating pattern ) Merging everything inside a single geometry to cook my modification is not an option here as i really need to keep my hierarchy paths intact for multiple software workflow and rendering purpose. Scripting looks like the way to go but i m not comfortable enough with it. Any idea how to tackle this specific problem ? Hscript ? Python ? In others words : /// For each geometry node inside a subnet. Add a specific Sop inside geometry nodes. Connect this new sop to the last existing sop . Set the display flag to this new node. Joy. // Thanks for your help. -
i would like to have a button to trigger a cook from my HDA. How can i go about that? Do i need a python script?
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Dear all, Good Evening, So, i was digging into the VEX functions "string" section. And i didn't found any clue to chop a string into an array. string myString = "1234Abc"; The goal will be to get this below : string arrayFromString[] = {"1","2","3","4","A","b","c"}; As well in python it is "native" : myString = "1234Abc" myString[0] would be "1" etc etc.... But to use it in a wrangle i need VEX ....If anybody has a clue . It will be 100% Welcome, as it could be a very simple way to chop and bytecrush long floating numbers. Might it be a NOOB question and i apologize already for that. Thank you a lot, And all the best to everybody with Houdini !!! alr + + +
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Hi guys, a noob question here but I cannot continue without this and can't figure it out either. How to run a python node? A guy in tutorial said ctrl+enter but that doesn't work for me and nothing happens in python shell.
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i am trying to reproduce a ramp sliding effect from vop to wrangle. I used the vop version for very long without issue,i add a parameter before the ramp to move its position(usually used to slide the ramp across UVs) For some reason it seems i am not reproducing the wrangle the right way. you can see the vop in the pic and my attempt at reproducing it in wrangle. i posted the file. script: float ptnum = (float)@ptnum; float numpt = (float)@numpt; float anim = chf("page_animation"); //slider from -1 to 1 float div = ptnum/numpt; float bend_anim = div+anim; float ramp_bend = chramp("ramp_bend",bend_anim); @bend = fit(ramp_bend,0,1,chf("bend_left"),chf("bend_right"));//slider from -90 to 90 book_odforce.hip
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Hi Guys, I have a number of nodes within OBJ level. Could anyone help me out with aligning selected nodes and aranged within Network Box? Python script. Thank you !
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Hi Guys I want to export spreadsheet value to txt file I know how to export to txt file using Python but I don't know what name(?) of parameter spreadsheet. Help me!!
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Hi everyone, Maybe the title isn't accurate. Basically, I'm editing the parameter interface of a tool I created, it consists of a main building and a terrace, I want to say to Houdini that I want to keep the maximum value of the slider that controls the number of floors of the terrace always below the value of floors of the main building. Also, if the user tries to give to the terrace a value bigger than the main buildng floors, it has to go back to the value buildingFloors-1 . How can I achieve that? Example: buildingFloors = 7 terraceFloors = 4 if I try to set terraceFloors = 9 it must set itself to terraceFloors = 6 -
Hey guys I have an HDA with 2 python SOPs inside. I need a button on the HDA that would trigger a function in one of the python SOPs. I looked at how callback scripts work but it was too confusing. Appreciate it if someone could help me out. Thanks! Cheers defc0n1
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Hi folks, i have a Python Processor with 5 work items and i would like to create a dependencies based on a attribute WorkItemID that increase for each work item. How can i create dependency to cook those work items exactly in the order that i want and not in parallel ? Thanks in advance
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At my lovely studio we have a bit of an unfinished Houdini render pipeline. We're able to use the farm to bake out geometry, but only serially. Also, writing out the IFDs is serial. We only have a handful of engine licenses. This is painless for sims, but this is a problem with SOP geo renders that can be baked out in parallel. Mantra renders, however, work in full parallel glory. How can I put an "opparm -c /path/to/ROPoutputdriver execute" script call (or any such code) somewhere where it will execute IN the IFD as it's rendering, but not during IFD generation? I tried putting that code in the Mantra's (set to render nothing) Pre-frame/Post-frame script parameter, but those execute AT IFD generation (which is serial), which doesn't help. Would a Python SOP work? If so how would I trigger it on frame render?
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Hi everyone! I'm starting to get into Python 2.7 for Houdini Indie (17.5) before jumping into Houdini 18 with Python 3, and I've been working in a flipbook tool until now everything is being okay but now I've found that I can't recover the camera settings/flipbook settings after generating the MPlay to maintain the user settings after applying the script. I've been trying to use the 'hou.GeometryViewportCamera.stash()' to create a copy of the settings but I'm not sure how to use it and where should I recover these settings. Also when I try to use it I get this error: 'TypeError: unbound method setDefaultCamera() must be called with GeometryViewport instance as first argument (got nothing instead)' I've created a simplified version of the script that I'll be attaching down below: If someone has any advice or idea of how would be the good approaching intro this, I'll bee really thankful. Thanks in advance to everyone.
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Hello everyone, I am currently setting up an asset pipeline for a project in houdini. My main question I have is how I handle the versioning of Digital Assets. I prepared an overview where you can see basically the 2 ways I came up with: The One option is the" self contained" one. When ever you want a new version of your asset you: 1.duplicate the subnet where you work in. 2.Then you have "subnet_v002" that gets turned in to a digital asset "asset_v002.hda" with the definition "asset::2.0" Every new version gets its own asset library and in every library there is only ONE definition of an asset as you can see in the picture. This workflow is good if on your drive you only want one .hda file associated with one asset version. The other option is the packed one. Same as the other when ever you want a new version of your asset you: 1.duplicate the subnet where you worked in. 2.But then you don't create a seperate library you only have one library with multiple definitions. One definition for one version. That means if the library asset.hda already exists with the definition asset::1.0 you will append the latest definition asset:2.0 to the library. In this case you have all the definitions packed in to one library. For me this option is a little confusing in that sense that you dont have a file seperation of the different versions and one asset library can become potentially huge in file size. One big point of assets is being able to update the assets in a houdini scene easily without destroying relations to other nodes. No when it comes to that for option "packed" as every version is in the same library you can simply write a script that updates all nodes with the same library to latest definition is that correct? But if i like the file seperation on disk for each new version, HOW would I in option "self contained" update my "asset_v002.hda" with asset::2.0 to "asset_v003.hda" with asset::3.0 as a definitio? All of this should happen kind of automated so I am searching a python way to do this. I would be really interested if anyone has update solution for the option "self contained" and what you generally think which option is the better one to handle digital assets. Thanks a lot Paul
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Hey, I've written a shelf tool to create flipbooks with custom parameters, and I want to know if it's possible to export it as mp4 once it's finished ? I tried with the flipbook_options.output() but it's exporting a video for each frame (so an image sequence), and I don't want to export an image sequence, but directly a video, if it's possible ! Cheers,
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Hello, I am able to select visible geometry manually, or even make a script to toggle the option to select geometry manually. But I'm wondering if there is a way to automatically select visible geometry only via a script? I have been unable to figure it out but it would be awesome if possible (may not be possible though?). Thanks! Ant
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Hi all, I recently found this Toolset on Github allowing realtime input & record of input from a leapmotion controller. https://github.com/arqtiq/HouLEAP Unfortunately I'm having a little trouble getting it to run properly. In the readme it explains to 'simply copy the content of the **/houdini16.x** folder to your houdini home/hsite folder.' So my question is, where would be the correct place to place the python scripts that the tool provides? (I'm not entirely sure what the 'hsite' folder is referring to?) Houdini see's the OTL's however i return the attached error in, what i assume, is the python scripting. Or perhaps I need to define LEAP in the .env file? Any tips much appreciated EDIT: The error is reported from the example .hip contained in the Github repository linked in my post. Also This was run in H 17.5.258.
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HOUDINI LIVE LINK AVAILABLE NOW IN GUMROAD many people have asked me to share live link script now in gumrorad Only priced at $ 7 houdini live conect with windows explorer you can quickly load ton's of model like obj ,bgeo to houdini directly by only one click https://vimeo.com/322629176
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Hi Houdniks, could anybody help me out make the grid lines in the network editor be default on Houdini launch? Couldn't find anything about it so far... Thanks in advance
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Hey Guys I wanted to share with you a small script I've done to have a better support or external editors to edit your expressions and code. It works with a system or file watcher, that means it doesn't freeze Houdini and you don't need to close your editor to see you updates It's available by a simple right-click on a parameter => expression => External Expression Editor ( you can set a hotkey ). It works with VEX and Python expressions but also regular HScript expressions ( but with no completion ). It works very well with Visual Studio Code as it has a nice VEX and Python plugins, but it could work with sublime text, notepad ++ etc. ( I haven't tested all the IDE out there so if you find a bug with one of them, feel free to send an email to contact@cgtoolbox.com ). A small video about it: https://vimeo.com/242470411 You can download it for free here: http://cgtoolbox.com/houdini-expression-editor/ PySide, PySide2 and PyQt are supported, it is compatible with Houdini 15 to 16.5.
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I can set handle position and orientation with omparm hscript command. But is it possible to get position\orientation of handle?
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