tomwyn Posted July 31, 2013 Share Posted July 31, 2013 Hey guys, Title is pretty self explanatory, but what I'm hoping to do is control the birth rate of my popnet source with the velocity of it's source geometry. Is it just a case of adding a velocity(vel/v) attrib to my sphere at the SOP level? (It's being animated along a curve using follow path) It seems like a fairly quick/simple thing to want to achieve, but I'm at a loss of how I'd go about it properly. Any tips would be much appreciated! cheers Quote Link to comment Share on other sites More sharing options...
Hudson Posted July 31, 2013 Share Posted July 31, 2013 (edited) hi! Look at the hip-file! You can adjust the parameters in the fit-vop and in the group $CR> then whatever you want oh, i missed somthing. Actually to change the birthrate.. But you could do that using the Cd attribute as well, Will take a look at it when I have time particle_from_vel.hipnc Edited July 31, 2013 by Hudson 1 Quote Link to comment Share on other sites More sharing options...
tomwyn Posted July 31, 2013 Author Share Posted July 31, 2013 Hey Hudson, Thanks for this - pretty much exactly what I wanted to achieve! In the fit-vop, I'm assuming the source max is representational of the velocity? That's quite an interesting way of calculating it using the length of the add sop(?) Cheers! Quote Link to comment Share on other sites More sharing options...
Hudson Posted July 31, 2013 Share Posted July 31, 2013 And here is the same hip-but with impulse rate based on vel as well particle_birthrate_from_vel.hipnc Quote Link to comment Share on other sites More sharing options...
Hudson Posted July 31, 2013 Share Posted July 31, 2013 (edited) I am actually calcutaling the length of the velocity vector. The add SOP simply adds velocity to all points. Edited July 31, 2013 by Hudson 1 Quote Link to comment Share on other sites More sharing options...
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