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Showing results for tags 'custom'.
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Hey magicians, I'm trying to build a velocity field to advect some VDBs from a shape to another, main Issue im having is that on the center, the velocity is too light, tried multiplying but stills cuts at some point, here are some images to illustrate: Any help would be great! Thank you!
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Hi guys, I'm really struggling with what seems to be a rather easy setup: Covering a collider object in smoke and at some point suck in all the smoke through various holes. Negative divergence seemed the way to go however it's completely ignoring the collision (see attached flipbooks) Any help would be highly appreciated. Thank you! smoke_negative_divergence.mp4 smoke_base.mp4 smoke_suction_fail.hiplc
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Hi Everyone, I am trying to create a water splash with separate water trails as shown in the below image. I have created separate sim for splash and main water sim. Using object velocity to emit splashes but unable to get proper shapes of water splash as per reference. Any ideas or suggestions will be of great help.
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Hey guys, how can I create a custom field on FLIP? I'm trying to achieve this. I guess I could advect the new field using a gas advect but I just can't add this new filed to the sim. Scene file is attached with a small progress Thx Custom_Field_Advection_0101.hiplc
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Hi everyone, recently i had a look into vellum and tried to make an emitter of soft objects colliding each other as they go. I know it does exist the setting "Emission type: continuous" which generates a copy of your geo and constraints periodically, and it works like a charm when you basically just want them to fall one over another. But this system seems not to be affected by external velocity, as for example do does a simple setup of multiple rbd objects. I was particularly interested in this because i want my objects to move with a random velocity, in a certain direction, within a cone angle; and i set all these properties in an AttributeRandomize at sop level. So, is there a way to feed this external velocity into dopnet, like you do with inherit velocity in rigid bodies? Plus, i know there are several methods to emit multiple rigid objects, using Packedobj and PopSource or the SopSolver and Rigidbodysolver combined with Multisolver. They seem clear and simple as hell, isn't there a way to make a similar process into a vellum driven dop? Attached below the hip file, with two examples of multiple rigid body emitters, which i can't replicate with vellum. Hope it helps. Oh, and i suddenly thought about vellum, but if there is another smarter method to do this (ie FEM...?) please let me know! Many thanks emitting_multiple_vellumobj.hipnc
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Hello, Can you please help me? I have a custom vortex force and I would like to apply it to vellum solver. How Can I do that? Thank you Gabor
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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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How would you auto-magically remove the trailing "1" after an instance of a custom OTL? It seems like there should be some on-creation script location, somewhere... -
How would you render the furthest ray hit surface? I'm not even sure where to start. Well, that's not entirely true. I have an altered shader using IsFrontFace to "turn off" the camera facing polygon. The problem is that this only gives me the next surface behind the first. Which is great if one is rendering a simple convex shape. But for a more complicated concave shape, like a wildly rippling blob of liquid, this isn't very usefull for comp. notBackHelp.hip
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Hi so Im stuck here... I have this basic setup, with ready to go agent its work well.. I now need to switch Agent geo to a custom "Fatty" one.. So I bind it to a joints from agent setup, "baked agend" but it looks like whole new geo is binded to just a root joint... Cant figure it out. H17 B. Custom_Agent_Help.zip
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Hello guys, Is there a way to create to dynamically create curve point custom handles ? I know I can create a simple curve in HDA and export the curve handle to the HDA, but I can't animate the curve position and edit the curve after. The curve node doesn't take account of the transform node, so it's a bit wierd to modify the points of the curve when the result is 100 meters away. Any help would be appreciated ! -
Hello! I defined a custom vex function in Attribute Wrangle node, and i can call it only from this node, when i call it from different Attribute Wrangle node i get Undefined Function error. Is there a way to declare a function in one node and to call it from the other node? The only way i found is to use external files with the #include filename. -
So I started watching this excellent tutorial about creating a spiderweb and got 3 minutes in.... https://www.youtube.com/watch?v=LFkzD9cgxek It's over my head with the coding at the moment so I thought I would try to create the same with SOPs and a bit of VOPs. I got pretty far pretty quick, and everything works so far (some dodgy maths, and weird values that work), but I am stuck on the VOPs bit. I want to randomise the rotations for the spar angles, I have them setup as primitive attributes, each one having a different number. I can get the attribute into VOPs (I think), but I'm pretty stuck at how to implement the randomisation per piece/attribute. Any help appreciated. HIP file attached. ) spiderweb_v002.hip
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Ok so just when I thought I had got my head around for each loops, I am struggling to get a custom attribute into a transform. The attribute is certainly seen by the copy to points node. and when I try to detail it in the transform, it justs gives back a zero. I've tried by including the transform in the for each loop, with a block begin fetch input etc. Makes no difference. (Using the spare input and -1 tag instead of the "../iteration". I've tried all combinations of cases @ signs, $ signs and whatever else. The "global attributes" colour and the scale nodes work fine. effector_v003.hip
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Hello, Over the summer, I'm planning to build a new PC for doing FX work (and also just general purpose). My brother put together this spec on pc part picker, (since he's more knowledgeable than me when it comes to hardware) but I thought I'd ask for advice as to where I should spend my money. Here's what I'm currently looking at: I've never built my own PC before so any advice you could give would be really helpful!
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Hi, rebels! I`m currently looking into some Houdini flip RND and I got this shot where I need to paint friction attribute on one side, e.g the water falls faster on one side of the ground. Is this a straight forward thing or is it a bit of a pain in the "!$ due to the nature of water? I attached a test file so you guys can get a sense of what I`m talking about friction_water_test_v001.hip
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Hi there, Very basic question, what is the correct way to get a custom shape volume, for example a spherical volume? When you plug geo into the volume node all it does is put a square bounding box around the geo. many thanks in advance
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Hi everyone! I'm relatively new to Houdini, and I came across a tutorial which explained the bullet solver for H13. I am trying to recreate the effect that he got at 53:15, where primitives were deleted from the constraint network when a force over a certain threshold was applied. tutorial: As I understand, the SOP solver was changed in H14, and I therefore don't have the object merge node that he has. I downloaded the example HIP file and copied his node into my own project and managed to get it working, however I'd like to know how it actually works, rather than just copying and pasting! The data that the node is bringing in, is as follows: `stamps("..", "DATAPATH", chsop("relnode") + ":Relationships/" + chs(chsop("relnode") + "/relname") + "/" + chs(chsop("relnode") + "/relationship/dataname") + "/Geometry")` This isn't like anything I've come across so far in houdini - if anyone knows what this means, and could explain it I'd be very grateful! Best, Stephen
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I have a popnet creating some particles with the POP spin, to have a random rotation in each particle, also Im copying a tube in each particle, the tube rotates as it supposed to, but when they hit the ground, the tubes stays with a random rotation as well instead of pointing Y. I'm thinking that if I use the normals instead of the POP spin I could blend between the N0 and N1 when the particle hit the ground, using the hit info from the POPnet, but truthfully I don't know how to achieve this .-. I'm using POPs and copy the tubes/coins to the particles because the particles born magicaly from the floor after a character hit the floor with his cane. If anyone could help me or have any idea I would appreciate it!!!
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Hi, I'm looking to build a PC at home and I don't know a huge amount these things so I'm looking for some advice. My budget is around £3k. The main uses will be Houdini, Maya and Nuke. I do a fair amount of heavy fx work and I'm planning to do gpu rendering with redshift. My main questions are to do with which cpu and gpu to go for: CPU - the AMD threadripper looks very interesting, is it worth waiting to see how much that costs and how it compares to intel i7/i9? - are the i9 chips worth it? - or is it better to go for a dual cpu (e.g. dual xeons)? Would that fit in my budget? is it possible to use just one cpu on a dual socket (with the option to add another at a later date)? GPU - I would ultimately like to have 2 or 3 gpus for rendering but, so I guess this influences which motherboard I can get (with enough pci-e lanes) - I think the 1070 seems like a really good option to start with for price/performance
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Hi everyone, Im trying to add custom big wave to Ocean and Dop network. For polygons everything works fine, but for other fields like surface and vel its now working and of course dop isnt working well, i dont know how to add it or how to deform other field like polygons. Here is the scene: custom_big_wave01.hip
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Hello everyone, I am trying to achieve a similar effect likes this by Ivan: On the sidefx forums, Ivan mentions that he creates two fields, one to attract the particles and one to keep the particles on the surface. I managed to create the force field to attract the particles but i cant find a way to create a field to keep the particles inside the geometry and form the shape. Any tips or help is highly appreciated.
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Heya, I've created a custom menu tool and added it to the menu using the MainMenuCommon.xml file - is there a way of soft-setting a hotkey to it within the xml, i.e. for multiuser project-based deployment? I'm thinking that adding the HotkeyOverrides file might work but if it's possible to keep it all contained in the single xml file that would be far tidier.
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Our new Houdini artist profile is out! Talented FX TD Alejandro Echeverry from Colombia explores how to create custom tools in Houdini and tells us a bit about his life as a VFX artist: http://www.gridmarkets.com/alejandro-echeverry.html I hope you find the content informative and entertaining. We certainly had fun working on this feature! Patricia and the rest of the GridMarkets team
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..., where can I change them? Are they available somewhere? Thanks!
