Implement translate function for circle geometry

src/ol/geom/Circle.js

@@ -5,7 +5,7 @@ import {createOrUpdate, forEachCorner, intersects} from '../extent.js';
 import GeometryType from './GeometryType.js';
 import SimpleGeometry from './SimpleGeometry.js';
 import {deflateCoordinate} from './flat/deflate.js';
-import {rotate} from './flat/transform.js';
+import {rotate, translate} from './flat/transform.js';
 
 
 /**
@@ -226,6 +226,17 @@ class Circle extends SimpleGeometry {
     this.changed();
   }
 
+  /**
+   * @inheritDoc
+   * @api
+   */
+  translate(deltaX, deltaY) {
+    const center = this.getCenter();
+    const stride = this.getStride();
+    this.setCenter(translate(center, 0, center.length, stride, deltaX, deltaY, center));
+    this.changed();
+  }
+
 }
 
 

test/spec/ol/geom/circle.test.js

@@ -281,6 +281,16 @@ describe('ol.geom.Circle', function() {
         expect(circle.getExtent()).to.eql(extent);
       });
     });
+
+    describe('#translate', function() {
+
+      it('translates the circle', function() {
+        circle.setCenter([1, 1]);
+        circle.translate(5, 10);
+        expect(circle.getCenter()).to.eql([6, 11]);
+        expect(circle.getExtent()).to.eql([5, 10, 7, 12]);
+      });
+    });
   });
 
 });