| /* |
| * Copyright (c) 2011, 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 atan2(num a, num b) |
| * Returns the angle between the positive x-axis and the vector ( [b], [a]). |
| * @description Checks the result for standard angles. |
| * @author msyabro |
| * @reviewer pagolubev |
| */ |
| import "../../Utils/expect.dart"; |
| |
| import "dart:math" as Math; |
| |
| main() { |
| Expect.equals(0.0, Math.atan2(0.0, 0.1)); |
| Expect.equals(0.0, Math.atan2(0.0, 10)); |
| Expect.equals(0.0, Math.atan2(0.0, double.INFINITY)); |
| Expect.equals(0.0, Math.atan2(1, double.INFINITY)); |
| Expect.equals(0.0, Math.atan2(0.0, 0.0)); |
| |
| Expect.equals(-0.0, Math.atan2(-0.0, 10)); |
| Expect.equals(-0.0, Math.atan2(-0.0, 0.0)); |
| Expect.equals(-0.0, Math.atan2(-1, double.INFINITY)); |
| |
| Expect.equals(Math.PI, Math.atan2(0.0, -0.1)); |
| Expect.equals(Math.PI, Math.atan2(0.0, -10)); |
| Expect.equals(Math.PI, Math.atan2(0.0, double.NEGATIVE_INFINITY)); |
| Expect.equals(Math.PI, Math.atan2(1, double.NEGATIVE_INFINITY)); |
| Expect.equals(Math.PI, Math.atan2(0.0, -0.0)); |
| |
| Expect.equals(-Math.PI, Math.atan2(-0.0, -0.1)); |
| Expect.equals(-Math.PI, Math.atan2(-0.0, -0.0)); |
| Expect.equals(-Math.PI, Math.atan2(-1, double.NEGATIVE_INFINITY)); |
| |
| Expect.equals(Math.PI/2, Math.atan2(0.1, 0.0)); |
| Expect.equals(Math.PI/2, Math.atan2(10, -0.0)); |
| Expect.equals(Math.PI/2, Math.atan2(double.INFINITY, 0.0)); |
| Expect.equals(Math.PI/2, Math.atan2(double.INFINITY, 0.0)); |
| Expect.equals(Math.PI/2, Math.atan2(double.INFINITY, -1)); |
| |
| Expect.equals(-Math.PI/2, Math.atan2(-0.1, 0.0)); |
| Expect.equals(-Math.PI/2, Math.atan2(-0.1, -0.0)); |
| Expect.equals(-Math.PI/2, Math.atan2(-10, 0.0)); |
| Expect.equals(-Math.PI/2, Math.atan2(double.NEGATIVE_INFINITY, 0.0)); |
| Expect.equals(-Math.PI/2, Math.atan2(double.NEGATIVE_INFINITY, 1)); |
| Expect.equals(-Math.PI/2, Math.atan2(double.NEGATIVE_INFINITY, -100)); |
| |
| Expect.equals(Math.PI/4, Math.atan2(double.INFINITY, double.INFINITY)); |
| |
| Expect.equals(3*Math.PI/4, Math.atan2(double.INFINITY, double.NEGATIVE_INFINITY)); |
| |
| Expect.equals(-Math.PI/4, Math.atan2(double.NEGATIVE_INFINITY, double.INFINITY)); |
| |
| Expect.equals(-3*Math.PI/4, Math.atan2(double.NEGATIVE_INFINITY, double.NEGATIVE_INFINITY)); |
| } |