Merge pull request #1783 from twpayne/first-last-coordinate

Get first and last coordinate

src/ol/geom/simplegeometry.exports

@@ -1,5 +1,7 @@
 @exportSymbol ol.geom.SimpleGeometry
 @exportProperty ol.geom.SimpleGeometry.prototype.getExtent
+@exportProperty ol.geom.SimpleGeometry.prototype.getFirstCoordinate
+@exportProperty ol.geom.SimpleGeometry.prototype.getLastCoordinate
 @exportProperty ol.geom.SimpleGeometry.prototype.getLayout
 @exportProperty ol.geom.SimpleGeometry.prototype.getSimplifiedGeometry
 @exportProperty ol.geom.SimpleGeometry.prototype.transform

src/ol/geom/simplegeometry.js

@@ -99,6 +99,14 @@ ol.geom.SimpleGeometry.prototype.getExtent = function(opt_extent) {
 };
 
 
+/**
+ * @return {ol.Coordinate} First coordinate.
+ */
+ol.geom.SimpleGeometry.prototype.getFirstCoordinate = function() {
+  return this.flatCoordinates.slice(0, this.stride);
+};
+
+
 /**
  * @return {Array.<number>} Flat coordinates.
  */
@@ -107,6 +115,14 @@ ol.geom.SimpleGeometry.prototype.getFlatCoordinates = function() {
 };
 
 
+/**
+ * @return {ol.Coordinate} Last point.
+ */
+ol.geom.SimpleGeometry.prototype.getLastCoordinate = function() {
+  return this.flatCoordinates.slice(this.flatCoordinates.length - this.stride);
+};
+
+
 /**
  * @return {ol.geom.GeometryLayout} Layout.
  * @todo stability experimental

test/spec/ol/geom/linestring.test.js

@@ -164,6 +164,14 @@ describe('ol.geom.LineString', function() {
           [[0, 0], [1.5, 1], [3, 3], [5, 1], [6, 3.5], [7, 5]]);
     });
 
+    describe('#getFirstCoordinate', function() {
+
+      it('returns the expected result', function() {
+        expect(lineString.getFirstCoordinate()).to.eql([0, 0]);
+      });
+
+    });
+
     describe('#getFlatMidpoint', function() {
 
       it('returns the expected result', function() {
@@ -176,6 +184,14 @@ describe('ol.geom.LineString', function() {
 
     });
 
+    describe('#getLastCoordinate', function() {
+
+      it('returns the expected result', function() {
+        expect(lineString.getLastCoordinate()).to.eql([7, 5]);
+      });
+
+    });
+
     describe('#getSimplifiedGeometry', function() {
 
       it('returns the expectedResult', function() {