Arpita Posted January 1, 2010 Share Posted January 1, 2010 Hi. I am trying to create an effect where I have a set of particles following a curve and then leave the curve to form a teapot. I have made the particles follow the path using an attractor pop. And made the leaving particles form the teapot using the SDF volume of the teapot in the VOP POP. - If you notice in the file, the particles seem to be going all over the place after the have become free from the curve and before they go towards the teapot. I used a drag separately for the 'free' particles. But it makes no difference. And I do not know any other way to tame the particles so they go smoothly towards the teapot. - Also, when the particles form the teapot, they seem to gather in some points and form sharp cones. I have no idea why this is happening either or how to correct it. These are my two main problems. Besides that, I would be very grateful if anybody has any other tips or suggestions to offer, to get the effect look nicer. Thanks in advance 1 Quote Link to comment Share on other sites More sharing options...
Arpita Posted January 1, 2010 Author Share Posted January 1, 2010 (edited) Sorry the file attachment was unsuccessful in the previous post. Here is the file. Thank you. OF_vop_pop.hipnc Edited January 1, 2010 by Arpita 1 Quote Link to comment Share on other sites More sharing options...
bunker Posted January 3, 2010 Share Posted January 3, 2010 Hey Arpita, happy new year ! One thing was wrong: when the particles came out of the curve, they didn't end inside the SDF volume and therefore didn't know what to do. So I made the SDF size bigger so it includes the end of the curve. Also, in the VOP POP I use the X position of the particles to drive a ramp from "almost" 0 to 1 so the transition between attractor and VOP POP is a bit smoother ( you might have to tweak the settings a bit so it's nicer ) have a look at the attatched file ( I coloured RED the modified bits ) OF_vop_pop2.hipnc I'm not sure what you meant by "sharp cones" ... hope that helps Sorry the file attachment was unsuccessful in the previous post. Here is the file. Thank you. Quote Link to comment Share on other sites More sharing options...
Arpita Posted January 3, 2010 Author Share Posted January 3, 2010 Hey Arpita, happy new year ! One thing was wrong: when the particles came out of the curve, they didn't end inside the SDF volume and therefore didn't know what to do. So I made the SDF size bigger so it includes the end of the curve. Also, in the VOP POP I use the X position of the particles to drive a ramp from "almost" 0 to 1 so the transition between attractor and VOP POP is a bit smoother ( you might have to tweak the settings a bit so it's nicer ) have a look at the attatched file ( I coloured RED the modified bits ) OF_vop_pop2.hipnc I'm not sure what you meant by "sharp cones" ... hope that helps Hey, thanks so much Julien! It works! I didn't think of the reference bounds for the iso offset. The fit VOP is interesting too. I am taking it further from there Besides, I am also trying to get past something else. The particles, after they form the geometry, seem to be gathering in clusters and wobbling. I do not know what I should use to bring them to rest once all the particles are on the geometry, stop them from swimming. Something like the RBD Autofreeze. I tried to use the velocity POP, multiplying $VX $VY $VZ * 0.6 or something like that to reduce their velocity over time. Was also thinking in lines of the rest VOP. I don't know if I'm thinking on the right lines cos they don't seem to be working. Still trying to think of other ways, but it would be great if I could get some help with that... Thank you. Quote Link to comment Share on other sites More sharing options...
bunker Posted January 3, 2010 Share Posted January 3, 2010 (edited) It's the "interact POP" the problem. I just keyframed the "Force Multiplier" from 1 to 0 and it works You could also use the age a the particles to drive the "force multiplier" ... OF_vop_pop3.hipnc Edited January 3, 2010 by bunker Quote Link to comment Share on other sites More sharing options...
Arpita Posted January 3, 2010 Author Share Posted January 3, 2010 It's the "interact POP" the problem. I just keyframed the "Force Multiplier" from 1 to 0 and it works You could also use the age a the particles to drive the "force multiplier" ... OF_vop_pop3.hipnc Weeee it works! I've learnt new things today Going to try the other way too Thanks so much Julien!!! Quote Link to comment Share on other sites More sharing options...
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