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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 part of dart.math; |
| 5 part of "math.dart"; | |
| 6 | 5 |
| 7 /** | 6 /** |
| 8 * A utility class for representing two-dimensional positions. | 7 * A utility class for representing two-dimensional positions. |
| 9 */ | 8 */ |
| 10 class Point<T extends num> { | 9 class Point<T extends num> { |
| 11 final T x; | 10 final T x; |
| 12 final T y; | 11 final T y; |
| 13 | 12 |
| 14 const Point(T x, T y) | 13 const Point(T x, T y) |
| 15 : this.x = x, | 14 : this.x = x, |
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| 83 * | 82 * |
| 84 * Squared distances can be used for comparisons when the actual value is not | 83 * Squared distances can be used for comparisons when the actual value is not |
| 85 * required. | 84 * required. |
| 86 */ | 85 */ |
| 87 T squaredDistanceTo(Point<T> other) { | 86 T squaredDistanceTo(Point<T> other) { |
| 88 var dx = x - other.x; | 87 var dx = x - other.x; |
| 89 var dy = y - other.y; | 88 var dy = y - other.y; |
| 90 return dx * dx + dy * dy; | 89 return dx * dx + dy * dy; |
| 91 } | 90 } |
| 92 } | 91 } |
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