ITdreamer Posted September 3, 2016 Share Posted September 3, 2016 Hello, friends I need to make particles emit from the source and go along the Y axis, and rotate around it as a vortex. But I don't want them to move to the axis and from it. I want the spiral movement and keep the distance from the axis the same all the time. I tried the axis force, but particles are moving to the axis, and I can't keep the distance from axis. Any ideas? Quote Link to comment Share on other sites More sharing options...
Yon Posted September 3, 2016 Share Posted September 3, 2016 http://www.sidefx.com/docs/houdini/ref/expression_cookbook Position Y cos(@ptnum * 2) Position Z sin(@ptnum * 2) Quote Link to comment Share on other sites More sharing options...
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