melazoma Posted July 2, 2010 Share Posted July 2, 2010 Hi all, I'm trying to use a force field built in SOP to shape the flow of a pyro sim. I'm getting the velocity field looking like the way I wanted it, but the smoke (density) is not coming along. What am I doing wrong? fieldforce_test_01.hip Quote Link to comment Share on other sites More sharing options...
Macha Posted July 2, 2010 Share Posted July 2, 2010 (edited) I have a vague feeling that the velocity shown and the force added via a vector field is not actually the velocity of the smoke. It may have to be copied onto the right field or something. Also, I noticed that you have 2 attributes called force, one a vector, the other a 3-float. Well, I don't understand it well either, but here is an alternative version that uses a Gas Field VOP. I think it offers more control and seems to work better, and faster, although I am not exactly sure if this is good enough for you. Bunker (Julien) helped me with a similar problem a while ago and provided me with this solution. machaVelSmokeVersion.hipnc Edited July 2, 2010 by Macha Quote Link to comment Share on other sites More sharing options...
Macha Posted July 2, 2010 Share Posted July 2, 2010 Actually, try this file instead. I adjusted the settings to get something workable. It takes a bit of fiddlyfiddle. machaVelSmokeVersion2.hipnc Quote Link to comment Share on other sites More sharing options...
melazoma Posted July 2, 2010 Author Share Posted July 2, 2010 Actually, try this file instead. I adjusted the settings to get something workable. It takes a bit of fiddlyfiddle. It's working! Thanks for the help on the gas field vop. And yes, the type mismatch on my force attribute definitely botched my attempt at building a force field grid. Quote Link to comment Share on other sites More sharing options...
Macha Posted July 2, 2010 Share Posted July 2, 2010 I knocked up something if you're interested: Quote Link to comment Share on other sites More sharing options...
~nature~ Posted July 5, 2010 Share Posted July 5, 2010 I knocked up something if you're interested: Hi,Macha,maybe your explosion lacks the continuously rolling feature.Have you tried it? Quote Link to comment Share on other sites More sharing options...
ikarus Posted July 5, 2010 Share Posted July 5, 2010 it appears that if i have anything in the tangent sop that changes or deforms, isnt reflected in the gas vop, is there a way for the gas field vop to reevaluate the sop path in the file path for the pcopen Quote Link to comment Share on other sites More sharing options...
Macha Posted July 5, 2010 Share Posted July 5, 2010 it appears that if i have anything in the tangent sop that changes or deforms, isnt reflected in the gas vop, is there a way for the gas field vop to reevaluate the sop path in the file path for the pcopen I think appending [$F] to the end of the op:filepath will solve that. Quote Link to comment Share on other sites More sharing options...
ikarus Posted July 5, 2010 Share Posted July 5, 2010 I think appending [$F] to the end of the op:filepath will solve that. ahh yes, i knew there was a short work around to get the recompile, much easier than making a custom velocity field and using vops to blend the two Quote Link to comment Share on other sites More sharing options...
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