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Position change triggers opacity ramp-down event.
Hi all,
I’d like to use an expression in a layer’s opacity parameter which looks for a change in the same layer’s position. When there is a change in position, I’d like the expression to ramp the layer’s opacity value down from 100 to 0 over 4 frames.
The layer’s default opacity would be 0 – basically, the layer flashes on briefly every time its position changes. Here’s a .gif to illustrate how it would look in keyframes…
Thanks in advance for any help you can offer!
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2 Replies
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I think this will work:
p = transform.position;
n = 0;
if (p.numKeys > 0){
n = p.nearestKey(time).index;
if (p.key(n).time > time) n--;
}
if (n > 0){
t = time - p.key(n).time;
ease(t,0,framesToTime(4),100,0);
}else{
0
}
Dan
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Thanks Dan.
That worked a treat.
Very much obliged to you!
Wal.
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