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9536b80781
Since we've got a vector class, and it has a getter for the magnitude, why not also a getter for the angle.
23 lines
810 B
Dart
23 lines
810 B
Dart
// Copyright 2018 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:ui';
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import 'dart:math' show pi;
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import 'package:test/test.dart';
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void main() {
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test('Offset.direction', () {
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expect(const Offset(0.0, 0.0).direction, 0.0);
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expect(const Offset(0.0, 1.0).direction, pi / 2.0);
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expect(const Offset(0.0, -1.0).direction, -pi / 2.0);
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expect(const Offset(1.0, 0.0).direction, 0.0);
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expect(const Offset(1.0, 1.0).direction, pi / 4.0);
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expect(const Offset(1.0, -1.0).direction, -pi / 4.0);
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expect(const Offset(-1.0, 0.0).direction, pi);
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expect(const Offset(-1.0, 1.0).direction, pi * 3.0 / 4.0);
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expect(const Offset(-1.0, -1.0).direction, -pi * 3.0 / 4.0);
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});
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}
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