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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 |
5 part of "math.dart"; | 5 part of "dart:math"; |
6 | 6 |
7 /** | 7 /** |
8 * A base class for representing two-dimensional axis-aligned rectangles. | 8 * A base class for representing two-dimensional axis-aligned rectangles. |
9 * | 9 * |
10 * This rectangle uses a left-handed Cartesian coordinate system, with x | 10 * This rectangle uses a left-handed Cartesian coordinate system, with x |
11 * directed to the right and y directed down, as per the convention in 2D | 11 * directed to the right and y directed down, as per the convention in 2D |
12 * computer graphics. | 12 * computer graphics. |
13 * | 13 * |
14 * See also: | 14 * See also: |
15 * [W3C Coordinate Systems Specification](http://www.w3.org/TR/SVG/coords.htm
l#InitialCoordinateSystem). | 15 * [W3C Coordinate Systems Specification](http://www.w3.org/TR/SVG/coords.htm
l#InitialCoordinateSystem). |
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266 | 266 |
267 /** | 267 /** |
268 * Converts a negative [int] or [double] to a zero-value of the same type. | 268 * Converts a negative [int] or [double] to a zero-value of the same type. |
269 * | 269 * |
270 * Returns `0` if value is int, `0.0` if value is double. | 270 * Returns `0` if value is int, `0.0` if value is double. |
271 */ | 271 */ |
272 T _clampToZero<T extends num>(T value) { | 272 T _clampToZero<T extends num>(T value) { |
273 assert(value < 0); | 273 assert(value < 0); |
274 return -value * 0; | 274 return -value * 0; |
275 } | 275 } |
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