cytrox
cytrox
About Me
Connect
LOCATION
Not Specified
WEBSITE
Houdini Skills
Availability
Not Specified
Recent Forum Posts
Orbit POP: how do I use a line as the center? Oct. 8, 2003, 12:28 p.m.
Sure, have a look here [odforce.net].
Orbit POP: how do I use a line as the center? Oct. 7, 2003, 8:03 p.m.
I just played around a little with it, and I think I got it to work (well kind of).
I removed the group1 node, and set instead in the source1 the birth group to ‘spline’ and impulse activation to constant 1,
and changed in the orbit1 node the orbit index from particle id to particle order,
and now the particles behave correctly when the spline curve is animated at SOP level (just added an xform directly after the model_spline_curve SOP).
The only thing is, during the first few frames a few particles go crazy, but after that, everything seems to work fine.
I removed the group1 node, and set instead in the source1 the birth group to ‘spline’ and impulse activation to constant 1,
and changed in the orbit1 node the orbit index from particle id to particle order,
and now the particles behave correctly when the spline curve is animated at SOP level (just added an xform directly after the model_spline_curve SOP).
The only thing is, during the first few frames a few particles go crazy, but after that, everything seems to work fine.
Orbit POP: how do I use a line as the center? Sept. 19, 2003, 9:06 a.m.
I had also a look at this demo, but didn't played with it yet.
I should still be available at www.vislab.usyd.edu.au, but I don't know the exact url. (something like http://www.vislab.usyd.edu.au/sidefx/cd2_5.X.XXX, [vislab.usyd.edu.au] but can't remeber the exact version).
IIRC, the actual implentation of the POP network differs from the one suggested in the comments.
Instead of birthing 101 particles at each frame with a lifespan of 1 frame (so that the particles represent the current position of the curve), simply 101 particles get birthed at frame 1 with a lifespan of 100 secs.
Perhaps you can't animate the curve because of that?
Cheers
Jens
I should still be available at www.vislab.usyd.edu.au, but I don't know the exact url. (something like http://www.vislab.usyd.edu.au/sidefx/cd2_5.X.XXX, [vislab.usyd.edu.au] but can't remeber the exact version).
IIRC, the actual implentation of the POP network differs from the one suggested in the comments.
Instead of birthing 101 particles at each frame with a lifespan of 1 frame (so that the particles represent the current position of the curve), simply 101 particles get birthed at frame 1 with a lifespan of 100 secs.
Perhaps you can't animate the curve because of that?
Cheers
Jens