art3mis Posted July 10, 2018 Share Posted July 10, 2018 Hi Have a simple DOP network for emitting particles from a mesh source. Right now when I add a gravity force the particles emit even when the mesh emitter is not moving. How can I modify this, perhaps with a VEXpression, so that gravity only affects the particles when the emitter is moving? Quote Link to comment Share on other sites More sharing options...
toadstorm Posted July 10, 2018 Share Posted July 10, 2018 If you just want to prevent particles from emitting when the source isn't moving, you can create a point attribute on the source mesh in SOPs to use as an "emission attribute" on the POP Source DOP. Try using a Trail SOP to compute the velocity of the mesh, then create an emission attribute based on the magnitude of the velocity vector: f@emission = length(v@v); Then use emission as your emission attribute. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.