Preserve extra dimensions in ol.geom.MultiPoint#closestPointXY

src/ol/geom/multipoint.js

@@ -42,14 +42,16 @@ ol.geom.MultiPoint.prototype.closestPointXY =
   }
   var flatCoordinates = this.flatCoordinates;
   var stride = this.stride;
-  var i, ii;
+  var i, ii, j;
   for (i = 0, ii = flatCoordinates.length; i < ii; i += stride) {
     var squaredDistance = ol.geom.flat.squaredDistance(
         x, y, flatCoordinates[i], flatCoordinates[i + 1]);
     if (squaredDistance < minSquaredDistance) {
       minSquaredDistance = squaredDistance;
-      closestPoint[0] = flatCoordinates[i];
+      for (j = 0; j < stride; ++j) {
-      closestPoint[1] = flatCoordinates[i + 1];
+        closestPoint[j] = flatCoordinates[i + j];
+      }
+      closestPoint.length = stride;
     }
   }
   return minSquaredDistance;

test/spec/ol/geom/multipoint.test.js

@@ -154,6 +154,15 @@ describe('ol.geom.MultiPoint', function() {
       expect(multiPoint.getStride()).to.be(4);
     });
 
+    describe('#getClosestPoint', function() {
+
+      it('preserves extra dimensions', function() {
+        var closestPoint = multiPoint.getClosestPoint([6, 6]);
+        expect(closestPoint).to.eql([5, 6, 7, 8]);
+      });
+
+    });
+
   });
 
 });