tagosaku
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How create a constraint network for simulating Car Suspensions?
tagosaku replied to mois23's topic in Effects
Yeah, I confirmed the file does not work properly for H18. I guess CHOP nodes are something changed.... -
how to access collision data of DOP network for a geometry Wrangle node and sopSolver
tagosaku replied to tagosaku's topic in Effects
Thank you, Julien and Ziconic. I am going to test it!! -
how to access collision data of DOP network for a geometry Wrangle node and sopSolver
tagosaku posted a topic in Effects
hi, I am looking for how to access collision data of DOP network for a geometry Wrangle node and sopSolver. This example is that I try to delete fluidParticle if it's inside of collision. I know I can delete it in SOP level in advance, but this point is I want to know how to access collision data in DOP network, and delete particles in dop network. I attached an example file. It would be great to show me how to write wrangle and how to create sopSolver network. Thanks in advance! deleteInsideOfCollision.hiplc -
Mixing animations from Mixamo.com
tagosaku replied to asnowcappedromance's topic in Animation & Rigging
I also did mesh level deform by blend shape. It works well, but has limitation to mix/blend nicely. anyway I just put screen captures here and some headup. 1 - some artists use agent node to import, but I used 'import FBX'. It creates mesh, bone, and material shader automatically better than agent SOP. I guess Agent SOP is good to apply a mixamo animation to own character. 2 - When importing mixamo FBXs, I noticed houdini apply TAKEs. I am not familiar with the TAKE, so I cleaned up animation in separate files, and open new session file. 3 - I wonder how to export alembic file with subframe interpolation. Before exporting, a character has smooth animation with float playback > turn off integer frame value. However, after importing it with alembic SOP, animation does not show smooth animation anymore because subframe interpolation is gone. I don't know why it happens, so I just cached with increment set to 1 to 0.1 rop alembic output SOP, in order to bake all subframes. My questions are: 4 -does anyone explain how to mix/blend animation with bone level clearly? 5 -How to export alembic file with subframe interpolation ? Thanks! -
overwrite Mantra's render properties on Geometry node
tagosaku replied to tagosaku's topic in Lighting & Rendering
>> Refract limit should work per Object, did you try it properly (like setting refract limit to 0)? I tried Mantra's refract limit to 0, and Geometry's refract limit to 4, but my glass object never get transparency/refraction until Mantra's one set to 3 or 4. Besides, I might need to set higher refract Limit on Mantra, and set low Limit per Geometry nodes. >>Pixel Samples can't be overridden per object Then Houdini should not have such a parameter option, lol -
overwrite Mantra's render properties on Geometry node
tagosaku posted a topic in Lighting & Rendering
hi, I try to optimize Mantra rendering. This example is about glass object, so try to apply for high sampling and more refract Limit. To do it, I attached render properties from edit parameter interface in a Geometry node, as a screen capture showing. However, a rendering image seems to ignore and nothing reflected by the parameters. So far; - pixel Samples and refract Limit are not working. - Geo Time samples is succeeded to overwrite. I wonder if I am missing something else, or actually we can only overwrite some limited parameters. -
render problem with multi-type objects as one geo node
tagosaku posted a topic in Lighting & Rendering
Hi, I have a problem to render Mantra with multi object type. Whening clicking render button from render view, it shows messages, 'generating scene' and 'Rendering(0.0%)'. However, actual rendering won't start. I am guessing problems are I try to merge different types of geos and render it as one Geo object. Is that really problem for Mantra???? here is test details; 1 - there are polygon, packed Geos, packed fragment, and (polysoup if unpacking ). Of course, NOT merging volumes 2 - This problem happens with turning on motion blur in Mantra. There is no problem with motion blur OFF. 3 - Mantra render's motion blur is ON, and delete attribute v (and w). Then rendering is working. 4 - surprisingly when changing order of merge-lines, rendering works somehow sometimes., strange !! Thus, I have not found logic to fail render mantra. If you have similar issue and solution, let me know, thanks! -
Oh, my god! Suprisingly that magic path is working! Thanks I wonder how you found this part "/overwrite_with_sop/fetch_old_value" in Houdini help(document)
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Hi, I am looking for how to import simed constraint object from DOP to SOP, in order to use DOP data (distance, impact attributes, etc, per primitive). I am guessing we should be able to import constraint data by Dop Import node, but there are something mistakes. I found another way that he turns on a constraint network node > relationship > ON attach internal constraint object parm, but I want to keep turning off this parameter. Thanks
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Prateek, I don't remember precisely due to a long time ago. My solution was that I paste a button UI as a custom a submit button on deadline node. When hitting the button, it triggers a python script to change cache directory on a cacheNode , and run the original deadline submission, instead of using pre-script. Also, I still don't know/remember why pre-script does not work in farm, but only locally. My guess are : 1 - pre-script is only executed when clicking render button on fetch/Mantra node, or when actual caching or rendering are happening. So I think the submit deadline is just copying and pasting hip file, and does not execute actual caching or rendering. That's why pre-script won't be triggered. 2 - the submit deadline button may ignore these button. 3 - Deadline may need a custom call like "OnJobSubmittedCallback" as Bonsak Schieldrop explained. 4 - actually, when deadline farm picks your jobs, it executes your pre-script,. However, when the job finishes, Houdini may reverse your pre-script. So you could try to type the same script in Post-render script whether this fixs. Some of my ideas could be wrong, but hopefully it gives you inspiration.
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Tomas, thanks for your advice. I don't install h18 yet, but I figured out how to fix by your hip file and comment. I think problem was SOP_solver and constraint_network nodes. It's kinda tricky to work them properly. This time I needed to turn on blur flag on relationship_geometry node in sop solver. I still don't completely understand sop solver node > dop_import node > objectMask parm, and constraintnet work node > relationship tab > constrained objects parm and attach internal constaint to object toggle. Sometimes I need to turn on/off or keep default, or write specific object names, etc. That lacks of fundamentals knowledge caused the problem this time.
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hi, I have a question about bullet sim's constraint. As a attached picture, I made a Glue constraint between active packed object and animated static packed object. When siming, I expect the bottom box start animating with constraint, like a parant. However, only the top box and one side of constraint point are moving. You might say to just make parent animation in SOP without bullet sim, but eventually I want to attach more fragment objects with soft constraints on the bottom part. I would appreciate for any helps, thanks!
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hi, I have a question about bullet sim for metal bending. Goal is to able to bend many times by a certain condition. So far , I tried a couple of tests, but never work properly. Outline of my thought and trials are: - hit a box and metal is bent momentaily and stop motion and keep a shape completely . And repeat to hit a box and metal is bent over and over again.... - use Glue and Soft(or hard) constraints to switch each other in SOP-solver by conditions of primitive attributes: impact, force, torque, etc. - probably we should not 'next_constraint_name' attribute in order to repeat switching constraints. - When using impact attribute to trigger switch glue to Soft constraints, fraguments start jiggling. This is because I guess fragments geo struggle with mixed constraints. Some constraints are connected as glue, and others are as Soft. - probably when switching constraint type, I should switch a whole fragments, instead of just a hit collsied pieces, in order to avoid strange jiggle. - If I just need one time bending, it's easy. Just picking one frame to switch a whole constraints to Glue. - maybe example pic has too many colliding boxs. Colliding could be happening every 50frames.. Thus, if anyone gives me a very smart rig, it would be amazing, thanks!
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Grayden, your explanation helps me understand 'Attach internal constraint to object' . Thanks. Then, I downloaded julian johnson's glue to soft above.hipnc., which contains only one RBD packed object, and tried to compare sim with the check box ON/OFF. Surprisingly sim results are different each other. I guess it causes by inside of sopSolver nodes. It would be great to have an answer if you have time to take a look. I really want to understand when I should turn on/off this function very well. Best regards,
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Thank you so much, Konstatin M ! That's very smart and primuv seems to be very powerful. I can proceed my stuff from there. Tesan, thanks, too. I will use it for different cases in future, too.
