| // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// @assertion double distanceTo(Point<T> other) |
| /// Returns the distance between this and other. |
| /// @description Checks that the returned value equals to the Euclidean distance. |
| /// Coordinate values are not Inf or NaN. |
| /// @author kaigorodov |
| |
| import "dart:math"; |
| import "../../../Utils/expect.dart"; |
| |
| const List<num> values = const [ |
| 0, -1, 1, 10, -10, 100, -100, |
| -1.7976931348623157e150, -3.273390607896142E15, -4.503599627370497E15, |
| -4.503599627370496E15, -4.5035996273704955E15, -4.294967296000001E9, |
| -4.294967296E9, -4.2949672959999995E9, -6031769.5, -101.0, |
| -100.00000000000001, -100.0, -99.99999999999999, -99.0, -10.0, |
| -1.0000000000000002, -1.0, -.9999999999999999, -.7, -2.2250738585072014e-150, |
| -4.9406564584124654e-150, .0, 4.9406564584124654e-150, |
| 2.2250738585072014e-150, .7, .9999999999999999, 1.0, 1.0000000000000002, |
| 10.0, 99.0, 99.99999999999999, 100.0, 100.00000000000001, 101.0, 6031769.5, |
| 4.2949672959999995E9, 4.294967296E9, 4.294967296000001E9, |
| 4.5035996273704955E15, 4.503599627370496E15, 4.503599627370497E15, |
| 3.273390607896142E10, 1.7976931348623157e150 |
| ]; |
| |
| const EPS = 1.0e-10; |
| |
| Random rand = new Random(962737962737); |
| |
| num randomVal() { |
| int k = rand.nextInt(values.length); |
| return values[k]; |
| } |
| |
| void check(num x1, num y1, num x2, num y2) { |
| Point point1 = new Point(x1, y1); |
| Point point2 = new Point(x2, y2); |
| double dist = (point1 - point2).magnitude; |
| Expect.equals( |
| dist, point1.distanceTo(point2), "x1=$x1, y1=$y1, x2=$x2, y2=$y2"); |
| } |
| |
| main() { |
| for (int i = 0; i < 1000; i++) { |
| num x1 = randomVal(); |
| num x2 = randomVal(); |
| num y1 = randomVal(); |
| num y2 = randomVal(); |
| check(x1, y1, x2, y2); |
| } |
| } |