better way to get ol.Feature.getGeometry().j

Question

ol.Feature.getGeometry().j get me the array of all coordinates. [ x, y, x, y, x, y .. ] thats work for points, or polygons. I use it to move the features and it work fast and fine. But the .j is not the "official" way to get the array. How about the best way? edit: I dont like use getCoordinates() it give different instance of arrays for points, or polygons and i dont like to use .j because it can chance in later versions. ( so i must fix it )

use ol.js 3.5.0 and jquery for the example code

var x=5, y=-10;
var l=feature.getGeometry().j,n=[],b=true;
$.each(l,function(i,v){
   if(b){
      n.push(v+x);
      b=false
   }else{
      n.push(v+y);
      b=true
}});
feature.getGeometry().j=n;

Answer 1

The function applyTransform() allows you to modify this internal representation of the geometry.

var move = function(input, output, dimension) {
  for (var i = 0, ii = input.length; i < ii; i += dimension) {
    output[i] = input[i] + x;
    output[i + 1] = input[i + 1] + y;
  }
};
geometry.applyTransform(move);

See also ol.TransformFunction