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particles move in an orbit

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Antony Gribovsky
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9 posts
Joined: 2月 2015
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Hi all! Tell me how to make the particles move in an orbit, like stars in a galaxy, and not fly apart? Thanks

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Enivob
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2658 posts
Joined: 6月 2008
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By using Vexpression, you can control the force based upon distance from center.

Controls popaxis force.
vector origin = {0,0,0};
orbitspeed = fit(abs(length(@P-origin)),0,1,3,0);

Controls applied drag.
vector origin = {0,0,0};
airresist = fit(abs(length(@P-origin)),0,1,0,10);
Edited by Enivob - 2022年11月25日 11:27:47

Attachments:
popnet_galaxy.gif (1.6 MB)
ap_popnet_galaxy.hiplc (314.9 KB)

Using Houdini Indie 20.5
Windows 11 64GB Ryzen 16 core.
nVidia 3060RTX 12BG RAM.
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Antony Gribovsky
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9 posts
Joined: 2月 2015
オフライン
 
Enivob, its look great, thx U!
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