Preserve extra dimensions in ol.geom.Point#closestPointXY

src/ol/geom/point.js

@@ -40,8 +40,12 @@ ol.geom.Point.prototype.closestPointXY =
   var squaredDistance = ol.geom.flat.squaredDistance(
       x, y, flatCoordinates[0], flatCoordinates[1]);
   if (squaredDistance < minSquaredDistance) {
-    closestPoint[0] = flatCoordinates[0];
+    var stride = this.stride;
-    closestPoint[1] = flatCoordinates[1];
+    var i;
+    for (i = 0; i < stride; ++i) {
+      closestPoint[i] = flatCoordinates[i];
+    }
+    closestPoint.length = stride;
     return squaredDistance;
   } else {
     return minSquaredDistance;

test/spec/ol/geom/point.test.js

@@ -95,6 +95,15 @@ describe('ol.geom.Point', function() {
       expect(point.getStride()).to.be(4);
     });
 
+    describe('#getClosestPoint', function() {
+
+      it('preseves extra dimensions', function() {
+        var closestPoint = point.getClosestPoint([0, 0]);
+        expect(closestPoint).to.eql([1, 2, 3, 4]);
+      });
+
+    });
+
   });
 
 });