Shape & Mask
General tips
Maintain stroke width
// from campkeyframe
sf = transform.scale[0]/100; ov = value;nv = ov / sf
// for parented shapes
value / length(toComp([0,0]), toComp([0.7071,0.7071])) || 0.001;
// https://battleaxe.tumblr.com/post/101945073972/maintain-stroke-weight-expression
Looping paths (loopOut() doesn't work for paths)
if (numKeys >1 && time > key(numKeys).time){
t1 = key(1).time;
t2 = key(numKeys).time;
span = t2 - t1;
delta = time - t2;
seg = Math.floor(delta/span);
t = delta%span;
valueAtTime((seg%2) ? (t1 + t) : (t2 - t));
}else
value
Accessing Shape parameters
Reference: https://ae-expressions.docsforadobe.dev/group.html?highlight=shape%20property#group
Syntax & Usage
thisProperty.propertyGroup(1).numProperties
thisProperty.propertyGroup(1).propertyIndex
Shape Property Index
Let's say if you have multiple Ellipses or other shapes within a Shape Layer Contents, and you want to retrieve the index of each Shape:
content("Ellipse 1").propertyIndex
thisProperty.propertyGroup(3).propertyIndex
If you want to use parse the index via the property name:
// using name as index eg. line_1
parseInt(thisProperty.propertyGroup(3).name.split("_")[1]); // method 1
parseInt(content(1).name.split("_")[1]) // method 2
Shape Property Group and Index
// shape group index
thisProperty.propertyGroup(2).propertyIndex // change num accordingly
Examples
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