JJ FX Posted April 11, 2017 Share Posted April 11, 2017 Hi, I emit my particles from geometry with normals. So my particles inherit normal attr. When I add popspin nothing happens. They just dont want to spin. example: popspin.hip Quote Link to comment Share on other sites More sharing options...
derjcmp Posted April 11, 2017 Share Posted April 11, 2017 (edited) http://www.sidefx.com/docs/houdini/nodes/dop/popspin You need to attatch some kind of geometry to really see the spin. also, for your particles to inherit the normal attr you need to set a wrangle after the facet like this: "v@v = @N;" Yoy can also try an POP Axis Force, most likely that's what you are looking for. Edited April 11, 2017 by derjcmp Quote Link to comment Share on other sites More sharing options...
JJ FX Posted April 12, 2017 Author Share Posted April 12, 2017 18 hours ago, derjcmp said: http://www.sidefx.com/docs/houdini/nodes/dop/popspin You need to attatch some kind of geometry to really see the spin. also, for your particles to inherit the normal attr you need to set a wrangle after the facet like this: "v@v = @N;" Yoy can also try an POP Axis Force, most likely that's what you are looking for. Well not really. I can just turn on display normals to see them spinning. And by default when I emit from the object with normals, particles inherit the normal. POP Axis Force - no I dont want vortex-like movement. I want the each particles to spin around its own normal or velocity vector. Because later I copy some geo onto them and its too clear that there is no spinning. And I dunno why popspin does not do what I want. There are almost no settings there so Im not sure what to make it to work. Quote Link to comment Share on other sites More sharing options...
Skybar Posted April 12, 2017 Share Posted April 12, 2017 Pop Spin doesnt rotate the normals, it rotates the particles orient attribute. So turn on "display particle origins" in the viewport and you can see that yes, they do spin around the axis you specified - in this case Y. 1 Quote Link to comment Share on other sites More sharing options...
JJ FX Posted April 13, 2017 Author Share Posted April 13, 2017 (edited) 21 hours ago, Skybar said: Pop Spin doesnt rotate the normals, it rotates the particles orient attribute. So turn on "display particle origins" in the viewport and you can see that yes, they do spin around the axis you specified - in this case Y. Hm.. I thought that normal would be like a "children" of the particle orientation. Okay so everything was working fine actually Edited April 13, 2017 by JJ FX Quote Link to comment Share on other sites More sharing options...
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