ofer Posted February 16, 2007 Share Posted February 16, 2007 Hi! I bumped into a problematic scenario with POPs. I have a POP network with particles emmited from a geometry object. The geometry is dynamic and a new point is added to it every once in a while. I want to birth one particle per point, but I have no way to know when a new point it added. So, I can't write a correct expression in the "Impulse Activate" parameter of the source POP. This way I can't control the number of particles birhed in my sim. I tried using VOPs to create a custom source POP, but I don't think it is possible. Maybe I should use the HDK? Maybe there is a better solution? Quote Link to comment Share on other sites More sharing options...
stevenong Posted February 16, 2007 Share Posted February 16, 2007 In the Impulse Birth Rate field, you can use $NPT which is the total number of points of the source geometry. No custom POP needed, unless I'm mistaking what you're looking for. Cheers! steven Quote Link to comment Share on other sites More sharing options...
ofer Posted February 16, 2007 Author Share Posted February 16, 2007 Damn! You are right! I tried npoints("."), which doesn't work, and I forgot $NPT. I'll try that. Thanks Quote Link to comment Share on other sites More sharing options...
ofer Posted February 17, 2007 Author Share Posted February 17, 2007 But it is still interesting to know the answer about custom source POPs. Quote Link to comment Share on other sites More sharing options...
Marc Posted February 17, 2007 Share Posted February 17, 2007 You can't use VOPs to create a custom source pop. VEX cannot create new points, only modify existing ones, you'll need to use the HDK for that . Cheers Marc Quote Link to comment Share on other sites More sharing options...
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