Normalize rotation to values between -180 and 180 degrees after animation

src/ol/view.js

@@ -296,9 +296,7 @@ ol.View.prototype.animate = function(var_args) {
 
     if (options.rotation !== undefined) {
       animation.sourceRotation = rotation;
-      var delta =
+      var delta = ol.math.modulo(options.rotation - rotation + Math.PI, 2 * Math.PI) - Math.PI;
-          ol.math.modulo(options.rotation - rotation + Math.PI, 2 * Math.PI) -
-          Math.PI;
       animation.targetRotation = rotation + delta;
       rotation = animation.targetRotation;
     }
@@ -399,7 +397,7 @@ ol.View.prototype.updateAnimations_ = function() {
       }
       if (animation.sourceRotation !== undefined && animation.targetRotation !== undefined) {
         var rotation = progress === 1 ?
-          animation.targetRotation :
+          ol.math.modulo(animation.targetRotation + Math.PI, 2 * Math.PI) - Math.PI :
           animation.sourceRotation + progress * (animation.targetRotation - animation.sourceRotation);
         if (animation.anchor) {
           this.set(ol.ViewProperty.CENTER,

test/spec/ol/view.test.js

@@ -494,7 +494,7 @@ describe('ol.View', function() {
       });
     });
 
-    it('takes the shortest angle to the target rotation', function(done) {
+    it('takes the shortest arc to the target rotation', function(done) {
       var view = new ol.View({
         center: [0, 0],
         zoom: 0,
@@ -509,6 +509,21 @@ describe('ol.View', function() {
       });
     });
 
+    it('normalizes rotation to angles between -180 and 180 degrees after the anmiation', function(done) {
+      var view = new ol.View({
+        center: [0, 0],
+        zoom: 0,
+        rotation: Math.PI / 180 * 1
+      });
+      view.animate({
+        rotation: Math.PI / 180 * -181,
+        duration: 0
+      }, function() {
+        expect(view.getRotation()).to.roughlyEqual(Math.PI / 180 * 179, 1e-12);
+        done();
+      });
+    });
+
     it('calls a callback when animation completes', function(done) {
       var view = new ol.View({
         center: [0, 0],