Remove unused sphere.midpoint() method

src/ol/sphere/sphere.js

@@ -90,28 +90,6 @@ ol.Sphere.prototype.haversineDistance = function(c1, c2) {
 };
 
 
-/**
- * Returns the midpoint between c1 and c2.
- *
- * @param {ol.Coordinate} c1 Coordinate 1.
- * @param {ol.Coordinate} c2 Coordinate 2.
- * @return {ol.Coordinate} Midpoint.
- */
-ol.Sphere.prototype.midpoint = function(c1, c2) {
-  var lat1 = goog.math.toRadians(c1[1]);
-  var lat2 = goog.math.toRadians(c2[1]);
-  var lon1 = goog.math.toRadians(c1[0]);
-  var deltaLon = goog.math.toRadians(c2[0] - c1[0]);
-  var Bx = Math.cos(lat2) * Math.cos(deltaLon);
-  var By = Math.cos(lat2) * Math.sin(deltaLon);
-  var cosLat1PlusBx = Math.cos(lat1) + Bx;
-  var lat = Math.atan2(Math.sin(lat1) + Math.sin(lat2),
-                       Math.sqrt(cosLat1PlusBx * cosLat1PlusBx + By * By));
-  var lon = lon1 + Math.atan2(By, cosLat1PlusBx);
-  return [goog.math.toDegrees(lon), goog.math.toDegrees(lat)];
-};
-
-
 /**
  * Returns the coordinate at the given distance and bearing from `c1`.
  *

test/spec/ol/sphere/sphere.test.js

@@ -11,92 +11,77 @@ describe('ol.Sphere', function() {
     {
       c1: [0, 0],
       c2: [0, 0],
-      haversineDistance: 0,
+      haversineDistance: 0
-      midpoint: [0, 0]
     },
     {
       c1: [0, 0],
       c2: [45, 45],
-      haversineDistance: 6671.695598673525,
+      haversineDistance: 6671.695598673525
-      midpoint: [18.434948822922006, 24.0948425521107]
     },
     {
       c1: [0, 0],
       c2: [-45, 45],
-      haversineDistance: 6671.695598673525,
+      haversineDistance: 6671.695598673525
-      midpoint: [-18.434948822922006, 24.0948425521107]
     },
     {
       c1: [0, 0],
       c2: [-45, -45],
-      haversineDistance: 6671.695598673525,
+      haversineDistance: 6671.695598673525
-      midpoint: [-18.434948822922006, -24.0948425521107]
     },
     {
       c1: [0, 0],
       c2: [45, -45],
-      haversineDistance: 6671.695598673525,
+      haversineDistance: 6671.695598673525
-      midpoint: [18.434948822922006, -24.0948425521107]
     },
     {
       c1: [45, 45],
       c2: [45, 45],
-      haversineDistance: 0,
+      haversineDistance: 0
-      midpoint: [45.00000000000005, 45]
     },
     {
       c1: [45, 45],
       c2: [-45, 45],
-      haversineDistance: 6671.695598673525,
+      haversineDistance: 6671.695598673525
-      midpoint: [0, 54.735610317245346]
     },
     {
       c1: [45, 45],
       c2: [-45, -45],
-      haversineDistance: 13343.391197347048,
+      haversineDistance: 13343.391197347048
-      midpoint: [0, 0]
     },
     {
       c1: [45, 45],
       c2: [45, -45],
-      haversineDistance: 10007.543398010286,
+      haversineDistance: 10007.543398010286
-      midpoint: [45.00000000000005, 0]
     },
     {
       c1: [-45, 45],
       c2: [-45, 45],
-      haversineDistance: 0,
+      haversineDistance: 0
-      midpoint: [-45.00000000000005, 45]
     },
     {
       c1: [-45, 45],
       c2: [-45, -45],
-      haversineDistance: 10007.543398010286,
+      haversineDistance: 10007.543398010286
-      midpoint: [-45.00000000000005, 0]
     },
     {
       c1: [-45, 45],
       c2: [45, -45],
-      haversineDistance: 13343.391197347048,
+      haversineDistance: 13343.391197347048
-      midpoint: [0, 0]
     },
     {
       c1: [-45, -45],
       c2: [-45, -45],
-      haversineDistance: 0,
+      haversineDistance: 0
-      midpoint: [-45.00000000000005, -45]
     },
     {
       c1: [-45, -45],
       c2: [45, -45],
-      haversineDistance: 6671.695598673525,
+      haversineDistance: 6671.695598673525
-      midpoint: [0, -54.735610317245346]
     },
     {
       c1: [45, -45],
       c2: [45, -45],
-      haversineDistance: 0,
+      haversineDistance: 0
-      midpoint: [45.00000000000005, -45]
     }
   ];
 
@@ -113,23 +98,6 @@ describe('ol.Sphere', function() {
 
   });
 
-  describe('midpoint', function() {
-
-    it('results match Chris Veness\'s reference implementation', function() {
-      var e, i, midpoint;
-      for (i = 0; i < expected.length; ++i) {
-        e = expected[i];
-        midpoint = sphere.midpoint(e.c1, e.c2);
-        // Test modulo 360 to avoid unnecessary expensive modulo operations
-        // in our implementation.
-        expect(goog.math.modulo(midpoint[0], 360)).to.roughlyEqual(
-            goog.math.modulo(e.midpoint[0], 360), 1e-9);
-        expect(midpoint[1]).to.roughlyEqual(e.midpoint[1], 1e-9);
-      }
-    });
-
-  });
-
   describe('Vincenty area', function() {
     var geometry;
     before(function(done) {