query particle age when speed==0?

[ashishdantu]

hi,

just off my head... what do you get when u use:

if (speed==0)
float $currAge = age;


i guess if you just get the age, its actually the Current age at the current frame ?

am interested to find out what and how you plan to spawn the tree upon particle collision ?

[MikeRhone]

I don't think there is actually a 'speed' attribute on particles. To get that you need to use

mag(velocity);

To print the age of the particle when its speed is 0, you could do this

$speed = mag(velocity);
if ($speed ==0)

{
$age = particleShape1.age;
print $age;
}

[Aikiman]

Another way would be to use a collision event, emit another particle shape.

[ftaswin]

Thanks, all...

I already have my trees growing as I wanted I just need more control and specific. What I did was I controlled the object index of my instancer to run only when the particle hits the ground (speed==0) and when I used smoothstep(0,lifespanPP*01, age) to control how fast my tree is growing to full shape instead of 0 if I can get the age when my particle hits the ground it's even more precise


Ft

[ftaswin]

mayday mayday...

I need to query the age only once first time the particle speed is 0.

The lines above query the age every frame. Heeelp...... Thanks

[Aikiman]

Just create an empty event in the collisions event manager and query if event is greater than 0 then do something.

[ftaswin]

Thanks Jeremy,

I've managed to tackle it with assigning an empty initialAge and modify it in runtime expression....

Thanks everyone for helping...

Ft

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