Particle Speed?

[Andrei_S]

How can i decrease speed of my particles without change all form?

I liked how they moving but i need lower speed.

speed.zip

[lisux]

How can i decrease speed of my particles without change  all form?

I liked how they moving but i need lower speed.

22620[/snapback]

Have you tried the Velocity POP, with something like this in the velocity fields:

$VX*.3, $VY*.3, $VZ*.3

Maybe this helps.

[Andrei_S]

I made this system in sop and i want change my speed in sop level.

I dont use pop operator in my scene.

In pop lever i can use speed limit and everything will be OK.

[old school]

Yeah this is tough because the point count is changing from frame to frame. If you want to speed up the sim, then all you need to do is cache the sim to disk, read back in with file then use a Cache SOP with an expression in the index to speed up the fetch. Still may have some issues with additional points.

Best way is to cache your Particle simulation to disk but at the frame rate you want by dumping at sub-frame intervals then adjust the velocity vectors to get correct motion blur with a Point SOP and multipying in to the velocity vectors by the ratio of the slow-down. Just make sure that you don't have any $F integers in your sim. Should be $T anyhow or at least $FF.

DOPs has a great feature using simulation time and using $SF in a dop network plus the ability to scale timie at the top. Unfortunately this feature is not in POPs.

[old school]

Doh. I see you are not using POPs. Cacheing to disk should still work.

Another way to slow down the sim is to globally change Houdini's playback rate. Unfortunately if you have $FF in your SOPs, then you will have to adjust for the speed change factor.

[Lukich]

Yeah, I thinkn you simply need to increase the frame rate of your scene - I set it to 60 and the particles slowed down considerably.

[AndrewVK]

CHOPS rules the world

http://cgtalk.ru/forum/attachment.php?atta...29&d=1132137646