Controling outro effects with layer outPoint

[Dan Ebberts]

The problem is that an expression has no way to access a parent comp in which its own comp is nested, except by name. So you can’t do something like “find the out point of this comp as a layer in its parent comp”.

Dan

[Alfred Timotei]

Hi Dan,

I managed to access the time value in seconds from the comp that I need. The problem is how I set the last 2 keyframes to match that value. That is my problem.

I have 3 sections in the timeline 1.intro effect 2.still 3.outro effect. I must move the last 2 keyframes but the distance between them must remain the same. Only the duration of the still must modify.

Best regards,
Alfred

[Dan Ebberts]

Expressions can’t move keyframes, but try this:


op = comp("Comp 1").layer("Comp 2").outPoint;
if (numKeys > 1){
n = numKeys;
v1 = key(n-1).value;
v2 = key(n).value;
t1 = key(n-1).time;
t2 = key(n).time;
if ((time > t1) || (time > op-(t2-t1)))
linear(time,op-(t2-t1),op,v1,v2)
else
value;
}else
value


Dan

[Alfred Timotei]

Thank you very much Dan, it’s working great, it’s exactly what I needed.

Best regards,
Alfred

[Alfred Timotei]

Hi again Dan, I’ve run into another problem. 😀

I saw that I can use easeIn or easeOut instead of linear, but for the sake of design I wanted to use the Ease and Wizz ExpoOut and ExpoIn.

How can I combine the two blocks of code? Basically, I want the ExpoOut or ExpoIn affect only the last 2 keframes.

Best regards,
Alfred

op = comp("Corporate 1 MAIN COMPOSITION").layer("1 Intro Logo").outPoint-0.034;
if (numKeys > 1){
n = numKeys;
v1 = key(n-1).value;
v2 = key(n).value;
t1 = key(n-1).time;
t2 = key(n).time;
if ((time > t1) || (time > op-(t2-t1)))
easeOut(time,op-(t2-t1),op,v1,v2)
else
value;
}else
value

// Ease and Wizz 2.0.3 : outExpo : All keyframes
// Ian Haigh (https://ianhaigh.com/easeandwizz/)
// Last built: 2012-10-11T16:37:31+11:00

// some defaults
var p = 0.8; // period for elastic
var a = 50; // amplitude for elastic
var s = 1.70158; // overshoot amount for "back"

function easeandwizz_outExpo(t, b, c, d) {
return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
}

function easeAndWizz() {
var n = 0;
if (numKeys > 0) {
n = nearestKey(time).index;
if (key(n).time > time) { n-- }
}

try {
var key1 = key(n);
var key2 = key(n+1);
} catch(e) {
return null;
}

// determine how many dimensions the keyframes need
var dim = 1; // It's gotta have at least ONE dimension
try {
key(1)[1];
dim = 2;
key(1)[2];
dim = 3;
} catch(e) {}

t = time - key1.time;
d = key2.time - key1.time;

sX = key1[0];
eX = key2[0] - key1[0];

if (dim >= 2) {
sY = key1[1];
eY = key2[1] - key1[1];

if (dim >= 3) {
sZ = key1[2];
eZ = key2[2] - key1[2];
}
}

if ((time < key1.time) || (time > key2.time)) {
return value;
} else {
val1 = easeandwizz_outExpo(t, sX, eX, d, a, p, s);
switch (dim) {
case 1:
return val1;
break;
case 2:
val2 = easeandwizz_outExpo(t, sY, eY, d, a, p, s);
return [val1, val2];
break;
case 3:
val2 = easeandwizz_outExpo(t, sY, eY, d, a, p, s);
val3 = easeandwizz_outExpo(t, sZ, eZ, d, a, p, s);
return [val1, val2, val3];
break;
default:
return null;
}
}
}

(easeAndWizz() || value);