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Maybe this helps: https://procegen.konstantinmagnus.de/wires-connecting-objects

You have tricks on Houdini Advent Calendar 2016 plus new solver on Houdini Advent 2023 on Qiita website .

Hi there, Quite new to Houdini and trying to create a simple setup of an emitter (lets say a sphere) which produces smoke (simple going upwards) and a box which attracts smoke and gets its volume filled in. I know that someone did something similar in the past: https://vimeo.com/223556457?fl=pl&fe=sh So I am trying to re-create something similar with a simpler setup (sphere emitter and box attractor) with the latest Houdini using latest nodes. I am able to create the sphere emitter (in Geometry -> Pyro Source etc etc) and DOP Network with Pyro solver and Volume Source emitter etc etc... but then I get stuck on how to make the smoke to be attracted to the box. I tried a few things but not getting the desired effect so far. Any idea how I can do this please? Any help would be appreciated! Thanks!!

Hi! I had a presentation on our Pax Dei world generation pipeline at the Everything Procedural Conference last April. If you're interested in large scale game world generation, procedural techniques, Houdini and Unreal, take a look! https://www.youtube.com/watch?v=Vlyt8lDx-Zk&t=5s

Volume mask has values 0 or 1, windforce reads this values as on/off state, if you remap volue from 0 to 1 you will have gradient falloff for windforce. DOP_mask_field_v03.hip

That's exactly right. Your images show what happens when you push density too far and completely fill each voxel to the maximum density value. Push density at the simulation level, not after the fact at render time.

Hello everyone, I hope you are doing well. I have a little question. Is it possible to control my simulation so that it is attracted by my tube? Like a pop attract, but for smoke ? I made a first simulation to have my base, which I freeze to import it into a second dop, the one in which I would like to "attract" my smoke towards the tube...

You can make a fog volume from the tube, negate it and source it into the Divergence field.

Hi Masoud, unless this is an academic exercise, you could just set polyexpand to 'surfaces' or simply use a polyextrude 'inwards'. Otherwise try joining each curve so it's one primitive per curve, reverse the winding order on one of them so they match, and interpolate a geometry of choice between both curves: vector bb = relbbox(0, v@P); vector pos_crv_0 = primuv(1, 'P', 0, bb.z); vector pos_crv_1 = primuv(1, 'P', 1, bb.z); vector pos_blend = lerp(pos_crv_0, pos_crv_1, bb.x); v@P = pos_blend; Curve_interpolate_KM.hipnc

check DOP_mask_field.hip