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There is also the preflight scene option (Use the Render ▸ Preflight menu item to find references in the current scene file to resources outside the project)
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Just a quick update, I can actually break constraints using targetv and pop force...it's just requires "big" values and constraints should be "somehow" easy to break (e.g. if I break some constraints, then the rest won't be able to withstand the force)...I guess, using a collision object is the safest and easiest way to break constraints... Seems like the only way to break constraints is either manually by placing them in broken group or a colliding object...
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Do you know what the brightest values in the HDR are? If they're crazy-high it could give you problems like that. A max value of 6.0 is pretty good - maybe try a max value of 3.0 to see if that solves it. Definitely keep it below 20.0 whatever you do, that's just begging for trouble. Blurring it could also be the answer ; to get rid of hot spots. You'll have to take the HDR into something like Nuke to do this ( did Photoshop ever make this kind of work possible? I avoid it like the plague ) *edit, Houdini has its own comper, maybe you can use that, I don't know how - 10 is really high for light samples - I've almost never needed more than 1, 10 must be super-slow
- Today
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hello I have a simple rbd sim exploding outwards that I want to turn into vellum grains as they explode. I have a simple set up working but the issue is that my source is emitting grains at every frame due to the creation frame being at $F. Is there a way where I can emit the grains on only one frame as the rbd is exploding ? I tried a length function to try and delete slow moving pieces but it is still emitting for a good 10 frames. I am trying to get it to emit once when the rbd piece is moving the fastest. The idea is to make the rbd pieces look like it is breaking up into a finer sand. I hope this is not a very complicated issue. I will attach my scene file for anyone that wants to take a look. Thank you rbd_into_grains.hip
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Are you in a hurry? Because I was about to post a gear generation asset with a gear connexion part. I already do this but in another software. Unfortunately, I'm really in a hurry to finish a job an I can't dive inside for now (not in yours, not in mine). I don't think I can get back to it for another week or two. What I can say for now is the "connexion" is fairly simple and is more a UI problem. I think the for-each approch is not the best (but it's just a quick opinion). At least the iteration use, cause the gears speeds is just about teeth numbers. You should create an attribute "numTeeth" and use it. And by the way I get an "incomplet asset" message. At the object level I just see a line.
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Hi, If you have glue constraints network (using Bullet), it's possible to break them using a colliding object (e.g. a moving sphere that is flagged as animated static). However, is it possible to break them using abstract forces (e.g. using field or fluid forces, or even uniform force)? I've tried many types of forces, but regardless of their strength they don't break constraints. I've noted that packed pieces don't have "F" attribute, neither the Glue primitives (i.e. impacts = 0)? I only get impacts if I use collision geo, and "F" I apply POP forces... Another related question: in addition to breaking constraints by colliding object, sop solver, and geometry wrangler, Is there another way to break glue constraints? Thanks
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Hi guys I'm trying to use rop file output node in for loop. I want to render multiple frame using for loop However It only renders last frame with rop file output node. When with file node's write mode, it works fine I need help. Any comments will be appreciated!! Thanks I attached hip file. Render Button is in the <rop_volume_texture1> node read smoke_39.bgeo at 'file1' node Questionfoorloop.hip smoke.39.bgeo
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hi guys I'm new to the Houdini, and I'm having hard time understanding how to make loop nodes what i want to do is to create a gear generator, which allows me to spawn connected gears with correct rotation speed something based on the link below, but using loop iteration number as gear name and doing the adding and multiplying based on previous gears information http://deborahrfowler.com/MathForVSFX/GearRatio.html where I'm stuck is figuring out the previous gears name and adding new gears info in it. any help will be appreciated!!! thank you in advance! GearGenearatorWIP3.hipnc
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Hi Guys, my very first try on Houdini Rigging and Muscles, is it possible to make a muscle with one loose end? I need a rig dynamic udder. (cow) The other thing I experiencing is when I ad a "Muscle Displace" and connect muscles it strongly deform my skin.. Why?? Thanks.
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Thanks so much for the effort, Max. Looks like a great approach, but I couldn't really get it to work. Ended up using a force field for the top of the logo. But I learned quite a bit by going through your setup. Cheers!
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Hi people, been lurking around here and gathering all the knowledge you are sharing, so thanks to each of you contributing to the forum. Lately I've been trying to understand another side of Smoke simulations and ways of controlling them. Before posting this I've gone through the most popular posts on the forum like "getting rid of mushroom" and others where there is tons of knowledge to pick up, I've also read the documentation on Microsolvers (Analysis, Match Field,...) multiple times in hope to understand which nodes to use and how to properly set them up. Could somebody point me to any resource to understand the workflow on building custom fields, how to use Gas Analysis, how it's related to Gas Match Field and some other aspects of these MS. I've been trying to understand what the documentation is saying and it's still a bit blurry to me compared to how other nodes are so well explained. A few days ago I've only read a quick post about building one but it doesn't explain much, it's more in the likes of "click this and click that, done". Apart from cracking open the Pyro Solver and individual Gas Microsolvers, where have you people picked up the knowledge / workflow on building custom fields. For what I've noticed people making tutorials and forum posts tend to steer away from anything that isn't Gas Turbulence, Shredding, Disturbance. Even a quick clarification on Gas Analysis / Calculate and it's common uses from you experienced people would be a massive help. Many Thanks!
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Nice to see it's doable. Too bad you can't share the hip. But how is the orientation grabbed in the actual dop? Are there any extra nodes or does the smokeobject actually read the orientation? Because I'm pretty sure I had orient and defined @N, @up and even @side. As pointposition that is used in the tutorial by trzanko didn't work for me which is what I tried.
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I'm trying to understand the best workflow for animation and I would like to hear your take on how you animate stuff. What I'm trying to turn my head around is if should animate inside SOP (transform) or outside SOP. Also, what are the cons and pros of doing so?
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Hi there, I already asked this question in the SideFx Forums -Maybe im lucky here! I created some fur on a sphere. (Doesn't matter, where I create it on, the error is always the same.) In the direction of one spot, the hair is getting thinner and I dont know why. Even if I generate it on a cube, the same happens. the strange thing is, that all the guides look completely good. Can anyone help? Thx in advance!
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need some help with POPS @impulseactiveate by expression or attribute
Freddo1083 posted a topic in Effects
I am creating a carpet bombing simulation based upon the beach napalm scene in Apocalypse now. I am setting up sources for pyro and particles and using a POP network to simulate the white phosphorous fuse and white smoke as the initial layer of the effect but I have run into a hurdle with the impulse activation. I have created spheres with animated noise and copied to points along a line. What i want is to cascade the activation of each sphere along the line as though the bombs are hitting the ground at different times. I originally thought of animating a separate sphere along the line, applying a color value of 1 and using attribute transfer to the source points which have a colour value of 0 and then setting the impulseactiveate value (sic mispelt but correct as per houdini tooltip) via a POP wrangle in line after the POP source referencing the Cd.x of the source points but this did not seem to work. @impulseactivate = @Cd.x; Maybe i have made an error as my vex knowledge and POPs knowledge is as a student very new. The only other method i can think of is to create a group for each sphere and then run a separate POP network for each sphere and keyframe the activation. This is very time consuming and I was wondering if someone would be kind enough to offer some advice on how to achieve what I need. -
Oh I didn't have freeze at frame option selected. That is pretty neat to have that though.
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Hello Everyone, I have just create tutorial of making dynamic to fluid and vellum in Houdini 17. Check in here: https://www.cgcircuit.com/tutorial/bullet-to-fluid-and-vellum Best Regards,
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You can use __display_sop__ or __render_sop__ in the path instead of the name of a real surface node name to have Houdini use whatever node has the display flag or render flag.
- Yesterday
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there is a great tool out there for that: https://github.com/wjakob/instant-meshes
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How to fix an attribute from changing over time
wreath replied to wreath's topic in General Houdini Questions
works like a charm man thanks! -
Really cool Andrea, that looks great! Soon as I get a chance I'll play around some more. Hopefully I can achieve a similar result! Thanks for the tips.
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Download the Houdini Game Dev tool , there is a sop node can do exactly what you want.
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I need to give to this a proper try but that's funny Here's an attempt. I generated the constraints during the vellum simulation to attach the worms to some points moving with the geometry. The movement of the worms is done with pop wind noise. Next step is to make them follow the moving character
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Does anybody know how to populate the file entry list with default values (in this case fonts), when creating a custom parameter interface?
