anupamd Posted July 5, 2011 Share Posted July 5, 2011 Is there a way to slow down a pyro sim after the simulation has cached. I guess I would also be curious about doing the same thing with a FLIPfluid sim. Timeblend does not seem to work with fluid sims. (probably because it is not channel data) Fumefx has a re-time feature that allows one to do this which is pretty handy for playing with different speeds of fluid sims after the fact. Im just trying to figure out if there is a houdini equivalent technique. The trick is to interpolate the velocity field data somewhere in the solver so even if no one has tried this it would be fun to try to figure it out. Quote Link to comment Share on other sites More sharing options...
symek Posted July 5, 2011 Share Posted July 5, 2011 Is there a way to slow down a pyro sim after the simulation has cached. I guess I would also be curious about doing the same thing with a FLIPfluid sim. Timeblend does not seem to work with fluid sims. (probably because it is not channel data) Fumefx has a re-time feature that allows one to do this which is pretty handy for playing with different speeds of fluid sims after the fact. Im just trying to figure out if there is a houdini equivalent technique. The trick is to interpolate the velocity field data somewhere in the solver so even if no one has tried this it would be fun to try to figure it out. It's definitely possible. TimeblendSOP serves different purpose though. It linearly interpolates geometry in between frames (so sub-framing is possible). It does it also for volumes (as a particular case of geometry). Use TimeWarpSOP for linear retiming, or TimeShift for channel control retiming. hth, skk. Quote Link to comment Share on other sites More sharing options...
hopbin9 Posted July 5, 2011 Share Posted July 5, 2011 I know you can store sub-sample data in the cache with DOP networks, but I don't know if that can be used to aid in re-timing. Quote Link to comment Share on other sites More sharing options...
symek Posted July 5, 2011 Share Posted July 5, 2011 I know you can store sub-sample data in the cache with DOP networks, but I don't know if that can be used to aid in re-timing. Sure, why not? Instead of blending between two frames, you take whatever you got from a sim, which increases quality. Quote Link to comment Share on other sites More sharing options...
ikarus Posted July 5, 2011 Share Posted July 5, 2011 well that would only work if you had a substepped sim to begin with the subframe advection method sounds plausible, it would be interesting to see what you get from 5 subframes of simulation as opposed to a single whole frame, since theoretically they should produce the same thing based on the time increment Quote Link to comment Share on other sites More sharing options...
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