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TFarrar
05-01-2002, 07:25 PM
Hi all,

I’m trying to make about 400 objects pop up randomly, but they have to stay put once they are on the scene. So basically the objects just appear randomly and stays put. I believe that using particles is the way to go here and I got every thing figured out but how to stop them from just floating up.

Thank in advance for any help.
svenip
05-01-2002, 08:04 PM
you could go by to make the surface a goal, put up the goal weight of the particles to 1. then you can create a creation expression which lets the particles be placed on a random UV position

particleShape1.goalU = rand(minU,maxU);
particleShape1.goalV = rand(minV,maxV);

then min max value depends on your surface. just take a look in the AE how your surface is parametrized.

then you need a random runtime expression

particleShape1.opacityPP = ..........

hope this helps
White Stallion
05-01-2002, 08:53 PM
Apply Gravity to your particles and then you can play with the life span..... at least that's how I would do it. I'm sure if I really understand what you are trying to do.
whatever
05-03-2002, 08:17 PM
Go with svenip's goal-weight idea... the particles will stay put when at max value "1".
His expresion idea also sounds good.
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