Expression that finds the distance that a layer has traveled

[Dan Ebberts]

I think the most immediate problem is that toWorld() doesn’t have a valueAtTime() method, but it has a time parameter (check the help doc). Also, your dist calculation has xDist in there twice, but not yDist.

BTW, when you post code, don’t preview your post, or it will eat your < symbols.

Dan

[Alex Printz]

Dan is right it’s the toWorld;

toWorld is a calculation, not a property, so “pos” it cannot check it’s value at a different time since it has no ‘time’, it’s just a number.

You must get your correct time calculated you want to check prior to a world position conversion, and then put it as a comma after your position to check, eg:

target.toWorld(target.anchorPoint,targetTime)

Try this:

function getDistanceTraveled(){
var T = thisLayer;
var sFrame = framesToTime(1,1/thisComp.frameDuration);
var tSample = Math.ceil(effect("Time Sample (Frames)")("Slider"));

var dist = 0;
for(i = 0; i < tSample; i++){
let tOne = time - (sFrame * i);

if (tOne < 0) {timeOne = 0;};

let tTwo = tOne - sFrame;

if (tTwo < 0) {tTwo = 0;};

var posOne = thisLayer.toWorld(thisLayer.anchorPoint,tOne);
var posTwo = thisLayer.toWorld(thisLayer.anchorPoint,tTwo)var
let xDist = Math.abs( posOne[0] - posTwo[0var];
let yDist = Math.abs( posOne[1] - posTwo[1] );
dist += Math.sqrt( Math.pow(xDist,2) + Math.pow(xDist,2) );
};

return dist;
};

var x = getDistanceTraveled();
[x,0];

Alex Printz
Mograph Designer