Patoz Posted March 26, 2020 Share Posted March 26, 2020 Hello guys, I am trying to recreate a helicopter landing scene on grass. I am new to Houdini and I was trying to use hair and a radial force to create the effect but not really having much good results. Could someone give me some tips on how to achieve the result? Thanks Luca Quote Link to comment Share on other sites More sharing options...
Atom Posted March 26, 2020 Share Posted March 26, 2020 Check out the Daily HIP website. You might be able to use the toroid velocity field. https://dailyhip.wordpress.com/2017/01/17/toroidal-velocity-volume/ 1 Quote Link to comment Share on other sites More sharing options...
Patoz Posted March 26, 2020 Author Share Posted March 26, 2020 Cool will try and have a look cheers keep you posted with results asap Quote Link to comment Share on other sites More sharing options...
Patoz Posted March 26, 2020 Author Share Posted March 26, 2020 It does not seem that I can link this type of volume force to vellum.... Will try using a wire solver instead and see how it goes Quote Link to comment Share on other sites More sharing options...
Patoz Posted March 26, 2020 Author Share Posted March 26, 2020 I ended up using procedural noise to achieve something similar....but now something I cannot really understand how to do is looping a ramp to keep repeating over time any suggestions? this is the scene: houdini_test_grass_file_scene_v003.hiplc Quote Link to comment Share on other sites More sharing options...
Noobini Posted March 26, 2020 Share Posted March 26, 2020 just foolin' around with my curveu HDA Quote Link to comment Share on other sites More sharing options...
Patoz Posted March 26, 2020 Author Share Posted March 26, 2020 13 minutes ago, Noobini said: just foolin' around with my curveu HDA How can you control the curves like that???? Quote Link to comment Share on other sites More sharing options...
Noobini Posted March 26, 2020 Share Posted March 26, 2020 just have a look at my HDA video...clearer to see in there Quote Link to comment Share on other sites More sharing options...
Patoz Posted March 26, 2020 Author Share Posted March 26, 2020 2 minutes ago, Noobini said: just have a look at my HDA video...clearer to see in there Cool will have a look thanks a lot Quote Link to comment Share on other sites More sharing options...
Noobini Posted March 27, 2020 Share Posted March 27, 2020 I wasn't sure if I'm on the same page with you with the effect, hence I just posted the giphy...if you want my RnD file, just yell. I'm not precious about uploading my files. Quote Link to comment Share on other sites More sharing options...
Gianluca Siciliano Posted March 27, 2020 Share Posted March 27, 2020 30 minutes ago, Noobini said: I wasn't sure if I'm on the same page with you with the effect, hence I just posted the giphy...if you want my RnD file, just yell. I'm not precious about uploading my files. I mean that would be much appriciated since I am on a learning curve looking a experienced people files would definitely help Quote Link to comment Share on other sites More sharing options...
Noobini Posted March 27, 2020 Share Posted March 27, 2020 (edited) here you are: - if you're not into crop circles...then simply disable plasticity in vellumhair - dive inside vellum solver, I've added the popaxisforce which gives you torus shape, I haven't played with it too much, it's there for you to experiment with just enable it, prolly wise to disable the popfan. (chuck my HDA into C:\Program Files\Side Effects Software\Houdini 18.0.xxx\houdini\otls) vu_HeloWind.hiplc Edited March 27, 2020 by Noobini 4 Quote Link to comment Share on other sites More sharing options...
Patoz Posted March 27, 2020 Author Share Posted March 27, 2020 This is super helpful...Now I do understand way more about the solver and the forces affecting the hair. Thanks a lot Cheers Quote Link to comment Share on other sites More sharing options...
Atom Posted March 27, 2020 Share Posted March 27, 2020 Here is a slight addition. A downward smoke simulation to emulate ground dust kick up. ap_helicopter_dust_test_10.hipnc 2 Quote Link to comment Share on other sites More sharing options...
Patoz Posted March 27, 2020 Author Share Posted March 27, 2020 7 minutes ago, Atom said: Here is a slight addition. A downward smoke simulation to emulate ground dust kick up. ap_helicopter_dust_test_10.hipnc This is awesome thanks a lot for your help guys Quote Link to comment Share on other sites More sharing options...
Noobini Posted March 27, 2020 Share Posted March 27, 2020 why didn't I turn the fan cone upside down ? it's friggin' obvious innit ? might try that. Quote Link to comment Share on other sites More sharing options...
Noobini Posted March 27, 2020 Share Posted March 27, 2020 7 hours ago, Atom said: Here is a slight addition. A downward smoke simulation to emulate ground dust kick up. ap_helicopter_dust_test_10.hipnc was there any toroidal thingie implementation in here ? just trynna look for it Quote Link to comment Share on other sites More sharing options...
Patoz Posted April 6, 2020 Author Share Posted April 6, 2020 I've been doing some test with the whole helo landing and stuff but now would be nice to have a sort of concentric force expanding from the position of the helo. A sort of "ripple" in loop Beeing trying with pop forces but failing Quote Link to comment Share on other sites More sharing options...
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