From c218d5d4e885d498836c8a123e239ffc68786c60 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Wed, 29 Jan 2014 01:22:33 +0100
Subject: [PATCH] Add ol.geom.LineString#getCoordinateAtM

---
 src/ol/geom/linestring.exports |  1 +
 src/ol/geom/linestring.js      | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/src/ol/geom/linestring.exports b/src/ol/geom/linestring.exports
index a258e088be..f5c50bdf5c 100644
--- a/src/ol/geom/linestring.exports
+++ b/src/ol/geom/linestring.exports
@@ -1,5 +1,6 @@
 @exportSymbol ol.geom.LineString
 @exportProperty ol.geom.LineString.prototype.clone
+@exportProperty ol.geom.LineString.prototype.getCoordinateAtM
 @exportProperty ol.geom.LineString.prototype.getCoordinates
 @exportProperty ol.geom.LineString.prototype.getLength
 @exportProperty ol.geom.LineString.prototype.getType
diff --git a/src/ol/geom/linestring.js b/src/ol/geom/linestring.js
index 8b8cfedc29..d97a316f6a 100644
--- a/src/ol/geom/linestring.js
+++ b/src/ol/geom/linestring.js
@@ -80,6 +80,18 @@ ol.geom.LineString.prototype.closestPointXY =
 };
 
 
+/**
+ * @param {number} m M.
+ * @param {boolean=} opt_extrapolate Extrapolate.
+ * @return {ol.Coordinate} Coordinate.
+ */
+ol.geom.LineString.prototype.getCoordinateAtM = function(m, opt_extrapolate) {
+  var extrapolate = goog.isDef(opt_extrapolate) ? opt_extrapolate : false;
+  return ol.geom.flat.lineStringCoordinateAtM(this.flatCoordinates, 0,
+      this.flatCoordinates.length, this.stride, this.layout, m, extrapolate);
+};
+
+
 /**
  * @return {ol.geom.RawLineString} Coordinates.
  * @todo stability experimental