Expression Help

[David Bogie]

You don’t need an expression to accomplish that effect although a script might help you with the ballistics and recoil physics.

bogiesan

This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”

[Mike Clasby]

For the Floating, put a wiggle expression on Position (Copy the expression, Alt-Click the Position Stopwatch, then Paste):

wiggle(1,30)

Adjust the 1 (frequency)or 30 (amplitude) to taste.

This might help with the shake part.

Marker Triggers Squish and Stretch_Jell-O

Place this expression on Scale (Copy the expression, Alt-Click the Scale Stopwatch, then Paste) will make the layer Jell-O wherever it finds a marker. You can add markers to a layer by hitting the * (asterisk) key on the numeric pad.

n = 0;
if (marker.numKeys > 0){
n = marker.nearestKey(time).index;
if (marker.key(n).time > time){
n–;
}
}

if (n == 0){
value;
}else{
maxDev = 10; // max deviation in pixels
spd = 20; //speed of oscillation
decay = 2.0; //how fast it slows down

t = time – marker.key(n).time ;
x = scale[0] + maxDev*Math.sin(spd*t)/Math.exp(decay*t);
y = scale[0]*scale[1]/x;
[x,y]

}

Adjust the MaxDev, spd and decay to taste, for decay smaller numbers are slower decay.
This is a hack from a couple of Dan Ebbert’s expressions and a little noodling of my own.

Actually you should be able to tie this in with collision detection in AE CS3, but I’m back with AE6.5 so I can’t test it. Here’s a source for collision detection:

https://www.motionscript.com/design-guide/collision.html

[Mike Clasby]

Probably self-explanatory, but you place the marker where the layer gets “stamped”.

[David Bogie]

Wow, yikes, that’s service with a smile. Nice work, hope I can try it myself.

Now I know where to come with all of my “Can someone write a custom expression for me?” inquiries.

bogiesan

[David Bogie]

Also try:

aenhancers.com

Fabulous stuff. Some deliciously deep. Some truly easy.

bogiesan

This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”

[Mike Clasby]

I don’t write them, I just cobble together ones I find, mostly Dan’s.

[Mikke1556]

wow…thanks for the help guys, ill try all that out and hopefully it’ll solve my problem 😀

[Mikke1556]

Marker Triggers Squish and Stretch_Jell-O

that expression doesnt work….the error message says there should be a ;

any ideas?

[Mikke1556]

lol what i mean is where should i put the ;