cmedithi Posted December 18, 2019 Share Posted December 18, 2019 HI Houdini Guys, Does anyone know , how to add random mass to vellum grain clumps, so that the bigger clumps falls fast. "context is that is that a creature comes out of ground and i need to add mass for the clumps, which is done with vellum grains." i tried using drag with mass option. but that did not work. sorry i cant share any hip file, Thankyou! Quote Link to comment Share on other sites More sharing options...
kleer001 Posted December 18, 2019 Share Posted December 18, 2019 Did you turn off "ignore mass" on your POP force node ? Please provide a simple version of your problem in a hip file for more detailed help. Quote Link to comment Share on other sites More sharing options...
Noobini Posted December 19, 2019 Share Posted December 19, 2019 didn't Galileo prove a few hundred years ago that objects with different masses fall to Earth with the SAME acceleration ? Unless you're a diehard Aristotle fan I guess. 1 Quote Link to comment Share on other sites More sharing options...
anim Posted December 19, 2019 Share Posted December 19, 2019 you may need to compute it yourself for example by computing density from how many particles are within certain radius using nearpoints() function 2 hours ago, Noobini said: didn't Galileo prove a few hundred years ago that objects with different masses fall to Earth with the SAME acceleration ? Unless you're a diehard Aristotle fan I guess. or unless you are considering air resistance, which you should unless you are in vacuum, don't expect bowling ball and feather to hit the ground at the same time, similarly large chunk of soil will fall faster than individual grains Quote Link to comment Share on other sites More sharing options...
Noobini Posted December 19, 2019 Share Posted December 19, 2019 (edited) 22 minutes ago, anim said: you may need to compute it yourself for example by computing density from how many particles are within certain radius using nearpoints() function or unless you are considering air resistance, which you should unless you are in vacuum, don't expect bowling ball and feather to hit the ground at the same time, similarly large chunk of soil will fall faster than individual grains well yes bowling ball vs feather case goes without saying...so I didn't say it. large chunks vs fine particles are less obvious....but it's a similar effect I guess..ie. just a slight breeze is enough to blow fine dust back up while large solid chunks keep on falling. Edited December 19, 2019 by Noobini Quote Link to comment Share on other sites More sharing options...
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