cwalrus Posted December 17, 2015 Share Posted December 17, 2015 Hi - this is related to the champagne simulation I mentioned in another post. How can I make a sim of flying liquid become a fine mist after a certain period of time? Basically I want any liquid older than 1 second to become a fine mist ... THANKS! Quote Link to comment Share on other sites More sharing options...
pclaes Posted December 18, 2015 Share Posted December 18, 2015 Think of it as separate elements. You have a portion of liquid (meshed particles) then lots of particles (kind of like whitewater on a river/waterfall), then a volume that you fade in.So you are looking at 3 sims. You can do one sim after the other and use the result of the first sim to emit into the next. Quote Link to comment Share on other sites More sharing options...
cwalrus Posted December 18, 2015 Author Share Posted December 18, 2015 What I'd like to do is have my meshed particles disperse after they've been alive for 2 seconds or so... or after they enter a volume or region... I already have the separate elements - but the primary liquid itself needs to go away, you know? Quote Link to comment Share on other sites More sharing options...
Hamp Posted December 19, 2015 Share Posted December 19, 2015 (edited) Delete the particles you don't want by putting them in a group and then delete them. Doing this prior to meshing should be the simplest way IMHO. If you want a smoother transition, let the particles entering that group start a counter using a Sop Solver and have the pscale gradually go towards zero. Edited December 19, 2015 by Hamp Quote Link to comment Share on other sites More sharing options...
cwalrus Posted December 20, 2015 Author Share Posted December 20, 2015 I really appreciate the suggestions, but I need to know HOW specifically if possible.. i.e. If I'm dealing with a Flip solver, how do I "Delete the particles you don't want by putting them in a group and then delete them." ? Let's say I want to put every particle that's older than 2 seconds into a group - how do I do that? I see the node "group" but beyond that I'm lost. And how do I "Let the particles entering that group start a counter using a Sop Solver and have the pscale gradually go towards zero. " thanks for any help! Quote Link to comment Share on other sites More sharing options...
origin Posted December 20, 2015 Share Posted December 20, 2015 I really appreciate the suggestions, but I need to know HOW specifically if possible.. i.e. If I'm dealing with a Flip solver, how do I "Delete the particles you don't want by putting them in a group and then delete them." ? Let's say I want to put every particle that's older than 2 seconds into a group - how do I do that? I see the node "group" but beyond that I'm lost. And how do I "Let the particles entering that group start a counter using a Sop Solver and have the pscale gradually go towards zero. " thanks for any help! http://www.sidefx.com/docs/houdini15.0/nodes/sop/group Quote Link to comment Share on other sites More sharing options...
Hamp Posted December 20, 2015 Share Posted December 20, 2015 Hi! Go to this awesome wiki and you'll find info about both grouping and sopsolver amongst other useful things. http://www.tokeru.com/cgwiki/?title=Houdini Quote Link to comment Share on other sites More sharing options...
cwalrus Posted December 21, 2015 Author Share Posted December 21, 2015 Thanks Hamp! very helpful. So much more so than a link the worthless help docs, btw. Quote Link to comment Share on other sites More sharing options...
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