help on particle rotation!

[clarix]

Looks like no one wants to help me out :`(.

Ok I added this line to the creation and now I dnt have any rotation from frame 1-100. At frame 100 it starts the rotation, but it does not random :( urghhhhhhhhhhhhhhhhhhhhhh.

if (time <= 100)

particleShape1.rotPP = 0;

else

particleShape1.rotPP = rand (0,360);

[Bonedaddy]

Either do it based on velocity...

$velo=(velocity);
$threshhold=0.1; //tweak this to taste

if (mag($velo)>$threshhold)) {
//do whatever rotation adding you want
}


or by time

$time=frame;
if ($time>=100) {
//rot code
}

[clarix]

Hi there, unfortunatly none of them worked:(.



Thanks anyways

[eddyx]

first I want to assume that rotPP is a PP attribute you created to drive the rotation of a particle instance object, otherwise you won't be able to see the rotation of individual particles anyway even your expression works(I could be wrong if there IS another case though, but rare).

Try create a particle object attribute that you can keyframe, e.g. "release".

In Creation Expression, still keep your lines:

rotPP = rand(0,360);

In runtime:

//animate "release" as a switch to zero out or initate the rotPP;
rotPP += 0.001 * release;

Hope this helps.

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