johnsvensson

Hi

I've a shot where I'm doing a flip sim for a tire splashing through a puddle. It goes from real time to real time * 0.05.

I noticed that it's not possible to animate the Scale Time parameter on the DOP network node. But the time scale on the flip solver is. So that what I did, it seems to work over all but when the sim hits the slow motion part and runs for another 20 frames or so some strange stuff starts to appear.
Mostly something to do with velocity I think.

I've found Atom's OdForce post on the topic and his vimeo video how he solved a couple of problems he run into.

https://vimeo.com/121376943 [vimeo.com]

I tried his way (some stuff has changed in the flip solver since version 13). It seed to get rid of some of the weird velocity stuff that was building up over time, but eventually I still get some weird poping in some areas. It's like there is a couple of points building up there velocity and turning white over time until they suddenly pop away.

It feels a bit weird diving in to the flip solver and changing stuff that I'm not sure about like that.

I'm rambling on, is there a better way to do this? (without retimeing after the sim)

Thanks a bunch!

/ John

Hi guys!

I got stuck again, with a similar problem, this time trying to get a value for a sop point attribute at a given frame.

Channels

channel = hou.node('../fileChop/OUT_AMPLITUDE')
value = nTrack.tracks().evalAtFrame(hou.frame())


Parameters

parm = node.parm(“tgl”)
value = parm.evalAsIntAtFrame(hou.frame() - 1)


Attributes

attr = geo.pointAttribs()
attr.evalAtFrame????????something maybe?


Is it possible to find out the value of a point attribute at a given frame? Cant find the correct syntax for it anyways, my solution was, hou.setFrame(myFrame) -> Evaluate attribute…
But I wasn't to happy with that solution.


well thanks again