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Zhaie

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About Zhaie

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  • Name
    Zhaie
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    Montréal
  1. Python Callback and Multiparm

    EDIT : I you're in QUEBEC ! Bonjour ! That's good to see other Houdini user in Quebec <3 Thanks a Lot Alain ! i realy appreciate that you take lot's of time to explain ! Ok sorry if it wasnt clear my goal is to create collisions for Unreal on pieces: - Create a multiparm where X is the number of pieces. - Let the user choose this type of collision ( Box / Sphere / Convex...) --- for that when i generate the multiparm number i need to create a subnet with parameters / nodes / inside of it. Thes node gonna have parameter linked to the multiparm pieces. -----> To create thes subnet/parm i need to generate them dynamically in my HDA Python. so i need the number to callback this script. ( that's not working ) I was doing the same thing as you at the beginning (Creating a Python node inside the HDA and use nuniqueval to make a list + get hre number of pieces ) But a friend of mine told me that it's a bit dangerous to Set Ui once you're in the node, that it could create some kind of a loop. That's why i'm trying to find the pieces number with a python script who's chek on the previous node the issue i got on my locgic was : if the number update in a parameter python script it dont callback the script on your HDA. But when you do it maanually it does >< The second multiparm was just to test that I gues you're right i'm gonna need a refesh button. that's sad Also, you're right, if i update a node before, my pieces number isn't always updated...damn ><
  2. Python Callback and Multiparm

    Hi Houdini People ! i have a question : I have a Multiparm who's updating number by Python Script (Basically : It get the input value of an attribute ) Once my Multiparm is set to the right number , i want to add some scipting on the hda. The problem is, if i update manually the number of multiparm instance, the callback is called ? But with my python script nothing happend. Any idear ? to be clear in the step i used : Plug a node with an attribute in my HDA ( the node is a connectivity who give me attribute pieces "name" ) On my HDA, the multiparm number is updated with python (it give me 3 different attribute pieces ( Pieces_0 , Pieces_1, Pieces_2) Now i call a function with callback on the multiparm to updates dymanically values nothing happend if i create a new multiparm with no Python on the number of instances i plug a node i update the values to 3 the callback is working fine any idears ?
  3. Hi Guys ! I would like to know if there is a simple way to create hierarchy in Houdini and Export them into a FBX ? It seams that a subnet in OBJECT working fine of one level but if i want multiple level ? Box_1 Box_2 Box3 Box_4 ... I find this : i'm gonna study it : https://sondreutheim.com/post/houdini__hierarchical_fbx_export But maybe there is an easier way now ? Have a nice day all !
  4. FBX Hierarchy

    If someone searching there is with child and FBX import with a file : it's fixe since 18.0.5
  5. thanks a lot for your help @underscoreus it helped ! Since i get more confident with my knowledge on vellum. Now i'm playing with the Vellum constrain properties a lot in both DOP and VellumSolver. Using Vex or only Hscript in it it was really hard to understand that some properties are more on the geo ( like Weld) or in constraints. Also it was not clear for me that the constraint created are not updatinng onn SOP but you can update them into solver. Anyway the Advanced vellum video helped a lot if someone want to understand vellum it's a must
  6. FBX Hierarchy

    Hi Houdini lovers ! One of our tech art as a problem with FBX / File node. He create hierarchyof Geometry in Maya and try to import it in houdini by using a file node in SOP. The strange thing is : Every other user see all the geometry but on his side he only see parent nodes. We try to uninstall Houdini and delete the usefiles , we try with houdini 16.5 17.5 and 18. nothing worked. He install FBX Review from autodesk , and we are wondering if it modify the reading of FBX or something ? We tried to uninstall this aswell but it didn't fix anything. Anybody has a clue ? or has already encournter this problem ? Have a nice day all !
  7. Hi here so my subject is : Inflate and Pop a geometry ( Like the pig head) I'm feeding a remeshed pieg head with Pieces generated with a edge fracture into a Vellum cloth. Then i add a Vellum Weld and a Vellum pressure to sew the pieces and inflate the Pighead. Inside the Vellum solver i animate the Rest Lenght Scale to inflate the balloon. Now i'm trying to break it : I start playing with the Breaking Thresholod in the VellumWeld : i try different values but i'm not achieving what i want. So i create a vellumconstraintproperty in Vellum Solver and animate with Breaking Thresholod value. it's stay at -1. so it's not working at all. I told myself, i could animate a map or a group ( Like with RBD) and destroy the constraint inside the vellum solver. that would give me a lot of control but that's not working either ( or i dont manage to build something ) And i a saw some Entagma's Video and this but i'm wondering if i could have more control on that Any idear ? Have Nice day all !
  8. Groupselection inside HDA

    Hi here ! I know it's a bit late,Did you find a Solution ?
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