[Dan Ebberts]

Do you want it to be at [640,450] in comp space? That would be like this:

fromComp([640,450])

[Dan Ebberts]

Actually, this is a better way to do it:

xAmp = 50; //height of undulations (pixels)
n = 2; // number of undulations
xFreq = n/thisComp.duration; // undulations per second
xSpeed = 150; //speed of wave (pixels per second)
wl = xSpeed/xFreq; //wavelength (pixels)
phaseOffset = ((position[0]%wl)/wl)*2*Math.PI;
y = xAmp*Math.sin(2*Math.PI*xFreq*time + phaseOffset);
value + [0,y]

[Dan Ebberts]

I think you’d need to change xFreq to something that gives you a number of complete undulations over your 7 second comp duration. Try .286

[Dan Ebberts]

Once I fixed the mangled quotes and minus signs (which happens in this forum if you don’t use a preformatted text box to post code), it seems to work fine. This should be OK:

src=thisComp.layer("Leader");
delay = thisComp.layer("Leader").effect("Delay")("Slider");
d = delay*thisComp.frameDuration*(index - 1);
src.transform.xRotation.valueAtTime(time - d);

[Dan Ebberts]

Try it this way:

src.transform.xRotation.valueAtTime(time – d);

[Dan Ebberts]

Try this:

textIndex > 1 && textIndex < textTotal ? 0 : 100

[Dan Ebberts]

You should be able to drive the animation with something like this (time remapping maybe, depending on how you have things set up):

tStart = thisComp.layer("Video").outPoint;
Math.max(time - tStart,0);

[Dan Ebberts]

It’s not elegant, but you can do something like this:

p = thisProperty;
while(!(p instanceof Layer)){
  p = p.propertyGroup(1);
}

[Dan Ebberts]

Something like this maybe:

n = 0;
cb = effect("VIDEO_3")("Checkbox");
if (cb.numKeys > 0){
  n = cb.nearestKey(time).index;
  if (time < cb.key(n).time) n--;
}
if (n > 0){
  cb.value ? linear(time, cb.key(n).time, cb.key(n).time + framesToTime(20),-100,0) : -100;
}else{
  cb.value ? 0 : -100;
}

[Dan Ebberts]

I guess either you have an old version of AE, or you have File>Project Settings>Expressions set to Legacy ExtendScript. In either case, this should fix it:

startIndex = 1;
idx = index-startIndex+1;
str = (idx < 10 ? "0" : "") + idx;
comp("Text Controller").layer("layer_" + str).text.sourceText;