【AE脚本】基于图层长宽 创建空对象矩阵

// https://github.com/ff6347/after-effects-script-snippets/blob/master/array-of-nulls.js
var main = function (){

    app.beginUndoGroup("XXX");

  var curComp = app.project.items.addComp('foo', 1000, 1000, 1, 5, 25);
    // 判断是否在合成内
    if (!curComp || !(curComp instanceof CompItem)){
          alert("noComp");
          return;
    };

  for(var x = 0; x < curComp.width; x+=200){
    for(var y = 0; y < curComp.height; y+=200){
        var l = curComp.layers.addNull(5);
        l.threeDLayer = true;
        l.position.setValue([x,y,Math.random() * 100 -50]);
        }
    }

  app.endUndoGroup();
 };

main();