Creating a explosion effect with expression

[Dan Ebberts]

I think this old tutorial of mine might be helpful:

https://library.creativecow.net/articles/ebberts_dan/particle_gen.php

Dan

[Bert Beltran]

Yes! This is amazing. I have one question. The animation is prefect its just the timing, right now the animation starts at the first frame. is there any way to delay the animation so that it begins at 1 sec on the timeline? Thanks again Dan… your my hero and an inspiration to me.

Muchos Thank You’s

[Dan Ebberts]

Edit: oops–I forgot to use the “Code” tags. Updated below:

I think you just need to change the birth/life expression on the Point Control. This has everything start at the layer’s in point:


lmin = 1.5; //minimum particle life
lmax = 2.5; //maximum particle life

i=1;
seed_random(i,true);
delay=random(lmax);
birth=delay;
death=delay;
t = time - inPoint;
if(t < delay){ [0,0] }else{ while (t >= death){
i += 1;
seed_random(i,true);
birth=death;
life=random(lmin,lmax);
death += life;
}
[birth,life]
}


This one starts at a specific time (specified by tStart):


lmin = 1.5; //minimum particle life
lmax = 2.5; //maximum particle life
tStart = 1; // start at one second

i=1;
seed_random(i,true);
delay=random(lmax);
birth=delay;
death=delay;
t = time - tStart;
if(t= death){
i += 1;
seed_random(i,true);
birth=death;
life=random(lmin,lmax);
death += life;
}
[birth,life]
}


Dan