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Found 39 results

  1. Hi all; I seem to be having a strange issue where I create a button on a null that is suppose to be a control system for a paint node; however, the button does not select the paint node. I have tried to use callback scripts by using a function like hou.cd("../path to the node") however I'm not getting any results and the button is not activating I'm not sure what is happening?. I appreciate all help anyone has to offer & I'm going to link the file that is isolating the issue underneath if anyone would like to take a look at it thanks. Kind Regards Rusty.M A simplified HIP file version of the same issue: cd_Button.hipnc
  2. opunhide all nodes using python

    How do you opunhide all nodes in a particular category or a bunch of specific nodes using python? I wish to add this in my startup script. a simple hou.hscriptExpression("opunhide Sop point") dosent seem to work. Nor does hou.hscript(). What am i doing wrong?
  3. Hi guys, I am trying to automate my alembic imports by using a string replace on my File path. For example: on my alembic File Name parameter I've written the expression - `strreplace($HIP, "home/fx", "fx/waterfountain_v001")`.abc I would like to be able to replace the version number with a wildcard so that it picks up the file regardless of what the version number is, but an (*)asterisk doesn't work. How should that be scripted? Thank you in advance!
  4. https://www.sidefx.com/forum/topic/52186/ Oct. 19, 2017 4:14 P.M. Is it not possible to enable the lock view to camera button via python/hscript? experimenting w/python on this in Apprentice 16.5.634 (_old_ PC) and running into issue(s) https://www.sidefx.com/docs/houdini/hom/hou/GeometryViewport.html ... showed me several things which DO seem to work using the following syntax : import hou, toolutils myCam = hou.node('/obj/').createNode('cam', 'myCam') hou.ui.paneTabOfType(hou.paneTabType.SceneViewer).curViewport().setCamera(myCam) # hou.hscript('viewhome -s *.*.world.persp1') hou.ui.paneTabOfType(hou.paneTabType.SceneViewer).curViewport().homeAll() hou.ui.paneTabOfType(hou.paneTabType.SceneViewer).curViewport().saveViewToCamera(myCam) # ... HOWEVER, when I try something similar, I just get an Error on : >>> hou.ui.paneTabOfType(hou.paneTabType.SceneViewer).curViewport().lockCameraToView() Traceback (most recent call last): File "<console>", line 1, in <module> AttributeError: 'GeometryViewport' object has no attribute 'lockCameraToView' # ... and I have Not found any way to do this using hscript either. Anyone have advice on this?
  5. Opchange "issue"

    Hi guys, Just a quick question I hope have a simple answer! I have a dual boot setup and switch back and forth between Win and Linux. Due to files having to point to same location I have a variable in the .env that point to each respective mounting place $NAS. Now, I imported an FBX through the File menu and it pops in as expected, but all the nodes have the full path in them. With the Textport I can do the "opchange" operation to switch the mounting place to the variable - but when I do that it converts the variable to it's value (the original path). My question now is: Can I somehow do the opchange without the Textport converting the variable to it's value and simply make it put the variable there instead of the path? I hope my rambling is not too confusing. Thanks a bunch, Jack
  6. Hi, I want to set the value of a parameter based on the value of a switch node, so if switch is 0 set the parameter to 1, if its 1 set the parameter to 10. Could anyone help with this? currently I am trying if((ch("../switch1/input")=0,1,10) could anyone tell me where im going wrong? thanks
  7. Does anyone know if its possible to make the HScript fit expression work so that the mapping from newmin to newmax is not linear, but rather curve like? Ideally I'm trying to make the progression from newmin to newmax be more S-like than a straight linear relationship. https://www.sidefx.com/docs/houdini/expressions/fit.html
  8. Where can i find every available global variable?? specifically i am looking for the number of points, i think its something like $NPT but i would like to have a list of every global variable so that i can search. its really difficult to find it, i only managed to find some about frames etc but nothing more. A link would be much appreciated
  9. Hscript importing conundrum

    Hi, my custom script is very simple : start the vexprofile , cook the snippet that holds my vex , stop the vexprofiler and show me the results. If i copy paste every line into the texport myself the code works. Howerver if I import the .cmd file holding the same three lines it shows me a empty vexprofiler. Doesn't importing .cmd files equal to writing them your self? If not is there something else that has this functionality? Why isn't this working? vexprofile start opcook -F /obj/L_System_v2/L-system/attribvop1/snippet1 vexprofile
  10. Hi, I'm playing around with limiting transform handles on nulls to act as a rigging control surface. I found on these forums a cool hscript snippet that allows this: clamp(cubic(),min,max). Does anyone know the python equivalent? The python clamp doesn't seem to accept a cubic() as a parameter. Also, does anyone know of another method of allowing for manual transform handle input that feeds into an expression? (HScript or Python). I can't wrap my head around why cubic() works! Cheers Dan
  11. Hello, I hope somebody can help me out as I have run into a problem when linking ramps via script that I have been unable to solve for more than a week now. What I would like to achieve is exactly the same effect that using "Copy Parameter" / "Paste Relative References" does when doing this from the user interface. I tried both python and hscript. The problem is that once the ramps are linked, when I add new control points to the parent, the child gets the control points but doesn't get the positions (ramp#pos) and values (ramp#value). In python I simply tried to set one float ramp parm to the other like this: hou.parm("/obj/node_B/ramp_B").set(hou.parm("/obj/node_A/ramp_A")) This seemed like the most simple and straightforward way of doing this but it failed so I reported it to the SideFX guys and they confirmed that python is not feature-complete for linking ramps with the .set() command - first they logged it as Bug #97192 then it was reconsidered to be an RFE with the same ID. After this SideFX suggested to use hscript opmultiparm which I proceeded to do but the ramp linking failed this time too. I am fairly confident using python but not so much with hscript so I am hoping it's my inability to use hscript properly this time rather than another bug - this is what I did: opmultiparm /obj/node_B/ 'ramp_B#pos' '/obj/node_A/ramp_A#pos' 'ramp_B#value' '/obj/node_A/ramp_A#value' 'ramp_B#interp' '/obj/node_A/ramp_A#interp' What I noticed in the "Edit Parameters" interface is if I manually type in the path to link the ramps then it does work the same as "Copy Parameter" / "Paste Relative References" - see below. I wonder if this field is exposed to python or hscript somewhere and maybe I should try to set this? Other than the above I also used both opscript and .asCode() after setting up the ramps links manually to see if it gives me the proper code and even if I run the code I get back from these the ramp linking still fails. Has anybody ever found a reliable solution for linking ramps in script? Anybody got any ideas where to go from here?:) EDIT: I found the solution on the SideFX forum by user jsmack in this post: https://www.sidefx.com/forum/topic/59899
  12. Hey guys, How can I change the path in mantra Output file from: P:/projectname/shotname/fx/work/houdini/hip to: V:/projectname/shotname/fx/geo can`t figure out how to run strreplace twice. this doesn`t work: `strreplace($HIP, P:, V:)` `strreplace($HIP, work/houdini/hip, geo)` $HIP is P:/projectname/shotname/fx/work/houdini/hip also + is to add to the path, how can i subtract from the path? Cheers Janis
  13. 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
  14. I have a parameter in my node that I want to convert to use python, usually we can right click> expression >change language to python but for some reason is gray out =( and reading documentation I could do parm.setExpression("2+2". language=Something) but I thought using hou.lenguage.Python as argument but wants a value? do we have something like parm.setScriptLenguage? or an easy way to switch all the node to use python, or just that parameter?
  15. Hi all, Is there any equivalent to nprimsgroup in python? I use this hscript expression in a switch, inside a for each SOP, to delete any prims connected to the outside group of a voronoi fracture: if( nprimsgroup( 0,"outside" ) !=0, 1, 0 ) Wondered what the python equivalent would be, because the Python SOP I wrote in its place is much slower to evaluate.
  16. Hscript question... again..

    Hi guys. Quick question.. why is this not working as a position to create a point in an Add node? centroid(`opinputpath(".",0)`,D_X) same for Y and Z Cheers
  17. The Artist's Guide to Technical Direction in Houdini - Volume 0: Hscript Back in 2005 I got my start as an intern at Side Effects Software Inc. Over the past decade of using Houdini, I've worked around the world in the film (Starz Animation, Dr. D, Digital Domain) and games (The Coalition, BioWare, EA Motive) industries. In this time, I've had the pleasure of working with many artists who were new to Houdini and sharing some of the insight I've gained. While most people are pretty excited to get their hands on the flashier parts of the software such as FLIP and Pyro, I think that Houdini's greatest strength comes from it's sheer flexibility. And that flexibility is something that only opens up the deeper you delve into how things work. What I like most about Houdini is discovering new ways of doing things. One complaint I've heard time and again, is that after following a tutorial, new artists are often left with something that looks pretty but with little understanding of how anything actually works. I'm always hearing complaints about how steep the learning curve is with Houdini. I'm seeking to help fix that with 7 hours of new training material that focus specifically on HScript scripting in Houdini. This course I've designed for artists who are either lacking a technical background, or who may have experience in other packages but want to understand Houdini better. We'll avoid creating pretty things in this series. Instead, I want to keep a sharp focus on how things work. That means learning about procedural networks, variables and attributes, functions, and for-each loops. Most importantly, I address how to self-learn Houdini. My hope is that this course will build a solid foundation for you to get the most of any future training you pursue and help you to understand how to get the most out of your Houdini networks. If you'd like to become more adept at scripting in Houdini, please consider signing up for my course: https://mixtrn.com/course/the-artists-guide-to-technical-direction-in-houdini-hscript/ Have a Great Day!
  18. I am trying to use the 'unix' hscript command to set the 'JOB' variable to my linux shell from inside Houdini but so far no success I got an 'not valid identifier' error if I do this: unix export JOB=$JOB I know I could use python but I am trying to use script for this one. Any tips? Thanks in advance.
  19. Hello all, So ive been customing the Houdini env variables within the Houdini docs folder. All working correctly with my job and hip file paths set as I wish. I was wondering is it possible to reference a system environment variable within the Houdini env variables script? (So set a environment variable called HOME to a certain path in the systems env variables) (Then call HOME within the Houdini env variables to set JOB or whatever). Any guidance or help appreciated as always Thanks C.
  20. Get position\orientation of handle

    I can set handle position and orientation with omparm hscript command. But is it possible to get position\orientation of handle?
  21. I'm in the middle of making an otl for our artists and was wondering if there is a way to switch Houdini's viewport panes between Scene View and Composite View. I haven't found the proper help files for manipulating Houdini's layout through scripting. Thanks Mike
  22. I'm in the middle of making an otl for our artists and was wondering if there is a way to switch Houdini's viewport panes between Scene View and Composite View. I haven't found the proper help files for manipulating Houdini's layout through scripting. Thanks Mike
  23. Is Geometry Selected???

    Is there any way to verify if some geometry components selected?
  24. I'm trying to drive a BlendShapes' SOP blend parameter using a point attribute, @fade. The @fade is a point attribute and have it's value animated. But the blend parameter doesn't appear to read this animated values and keep showing 0 instead. The question: the blend parameter doesn't work with point attributes? I tried VEX and Hscript forms (@fade and $FADE). The second crashes.
  25. hi everyone.wish you have a nice day. i need some help about scripting.but my English skill is not well.sorry for that. i have a hip named "test_hipfile_v001.hip".in this hip file i have a geometry ROP node that i want cache something like pyro,particles.and i want the cache named like "cache_pyro_v001.bgeo",the important thing is the cache version equal file version. here is the function i want achieve: when my hipfile update version to v002,i want the cache version auto-update to v002. i know $HIPNAME can fetch the file name ,but i don't know how to fetch the version info from $HIPNAME and transfor to .oh,i forgot another thing is i want code only in the Geometry ROP Node,because i achieve this function in SOP use Attribute Wrangle SOP Node,and transform the version info to ROP Node,but i think this too messy. can you gays give me some advise?thanks.