Add ol.geom.MultiLineString#getFlatMidpoints

src/ol/geom/multilinestring.js

@@ -112,6 +112,27 @@ ol.geom.MultiLineString.prototype.getLineStrings = function() {
 };
 
 
+/**
+ * @return {Array.<number>} Flat midpoints.
+ */
+ol.geom.MultiLineString.prototype.getFlatMidpoints = function() {
+  var midpoints = [];
+  var flatCoordinates = this.flatCoordinates;
+  var offset = 0;
+  var ends = this.ends_;
+  var stride = this.stride;
+  var i, ii;
+  for (i = 0, ii = ends.length; i < ii; ++i) {
+    var end = ends[i];
+    var midpoint = ol.geom.flat.lineStringInterpolate(
+        flatCoordinates, offset, end, stride, 0.5);
+    goog.array.extend(midpoints, midpoint);
+    offset = end;
+  }
+  return midpoints;
+};
+
+
 /**
  * @inheritDoc
  */

test/spec/ol/geom/multilinestring.test.js

@@ -69,6 +69,14 @@ describe('ol.geom.MultiLineString', function() {
       expect(multiLineString.getStride()).to.be(2);
     });
 
+    describe('#getFlatMidpoints', function() {
+
+      it('returns the expected result', function() {
+        expect(multiLineString.getFlatMidpoints()).to.eql([2, 3, 6, 7]);
+      });
+
+    });
+
   });
 
   describe('construct with 3D coordinates', function() {