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Random Scale Expression
Hey guys- I’m trying to craft an expression that will allow me to wiggle the scale of each layer independently of all the other layers but all connected to the same slider control. I also need the keyframed scale values to remain for each layer. I’ve tried a dozen different methods but can’t seem to get it right.
Ultimately each scale will equal itself + a random number (which has a Max value determined by the slider) I can get that far- but I can’t seem to get the random number to occur only every 8 frames or so. Any suggestions? Thanks!
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4 Replies
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So I came up with this script which does everything I need except it scales as if I used Hold keyframes- any way to interpolate between time? Thanks!
holdTime = .2; //time to hold each position (seconds)
seed = Math.floor(time/holdTime);
seedRandom(seed,true);
multiplier = random(1,8);
Scaler = thisComp.layer(“Scale Shaker”).effect(“Slider Control”)(“Slider”);
Shaker = transform.scale[0]+multiplier;if (Scaler > 0){
[Shaker,Shaker];
}else {[value[0],value[1]];} -
sumthing like this?
holdTime = .2; //time to hold each position (seconds)
var current_time = time% holdTime;seed = Math.floor(time/holdTime);
seedRandom(seed,true);
multiplier = random(1,-20);
if(current_time < holdTime/2){ amount =transform.scale[0]+ linear(current_time, 0, holdTime/2, 0, multiplier); }else{ amount =transform.scale[0]+ linear(current_time, holdTime/2, holdTime, multiplier, 0); } [amount ,amount ]; -ross -
That gives me the scaling I need but the scaling still takes place when the slider equals 0 which it should not.
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oh yeah forgot there was a slider… here ya go
var slider_val = effect(“Slider Control”)(“Slider”)
if(slider_val != 0){
holdTime = .2; //time to hold each position (seconds)
var current_time = time% holdTime;
seed = Math.floor(time/holdTime);
seedRandom(seed,true);
multiplier = random(0,slider_val );
if(current_time < holdTime/2){ amount =transform.scale[0]+ linear(current_time, 0, holdTime/2, 0, multiplier); }else{ amount =transform.scale[0]+ linear(current_time, holdTime/2, holdTime, multiplier, 0); } [amount ,amount ]; }else{ [value[0], value[1]] } -ross
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