Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(92)

Side by Side Diff: sdk/lib/math/point.dart

Issue 2754013002: Format all dart: library files (Closed)
Patch Set: Format all dart: library files Created 3 years, 9 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
« no previous file with comments | « sdk/lib/math/math.dart ('k') | sdk/lib/math/rectangle.dart » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
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 part of dart.math; 4 part of dart.math;
5 5
6 /** 6 /**
7 * A utility class for representing two-dimensional positions. 7 * A utility class for representing two-dimensional positions.
8 */ 8 */
9 class Point<T extends num> { 9 class Point<T extends num> {
10 final T x; 10 final T x;
11 final T y; 11 final T y;
12 12
13 const Point(T x, T y): this.x = x, this.y = y; 13 const Point(T x, T y)
14 : this.x = x,
15 this.y = y;
14 16
15 String toString() => 'Point($x, $y)'; 17 String toString() => 'Point($x, $y)';
16 18
17 /** 19 /**
18 * A `Point` is only equal to another `Point` with the same coordinates. 20 * A `Point` is only equal to another `Point` with the same coordinates.
19 * 21 *
20 * This point is equal to `other` if, and only if, 22 * This point is equal to `other` if, and only if,
21 * `other` is a `Point` with 23 * `other` is a `Point` with
22 * [x] equal to `other.x` and [y] equal to `other.y`. 24 * [x] equal to `other.x` and [y] equal to `other.y`.
23 */ 25 */
24 bool operator ==(other) { 26 bool operator ==(other) {
25 if (other is !Point) return false; 27 if (other is! Point) return false;
26 return x == other.x && y == other.y; 28 return x == other.x && y == other.y;
27 } 29 }
28 30
29 int get hashCode => _JenkinsSmiHash.hash2(x.hashCode, y.hashCode); 31 int get hashCode => _JenkinsSmiHash.hash2(x.hashCode, y.hashCode);
30 32
31 /** 33 /**
32 * Add [other] to `this`, as if both points were vectors. 34 * Add [other] to `this`, as if both points were vectors.
33 * 35 *
34 * Returns the resulting "vector" as a Point. 36 * Returns the resulting "vector" as a Point.
35 */ 37 */
(...skipping 12 matching lines...) Expand all
48 50
49 /** 51 /**
50 * Scale this point by [factor] as if it were a vector. 52 * Scale this point by [factor] as if it were a vector.
51 * 53 *
52 * *Important* *Note*: This function accepts a `num` as its argument only so 54 * *Important* *Note*: This function accepts a `num` as its argument only so
53 * that you can scale Point<double> objects by an `int` factor. Because the 55 * that you can scale Point<double> objects by an `int` factor. Because the
54 * star operator always returns the same type of Point that originally called 56 * star operator always returns the same type of Point that originally called
55 * it, passing in a double [factor] on a `Point<int>` _causes_ _a_ 57 * it, passing in a double [factor] on a `Point<int>` _causes_ _a_
56 * _runtime_ _error_ in checked mode. 58 * _runtime_ _error_ in checked mode.
57 */ 59 */
58 Point<T> operator *(num/*T|int*/ factor) { 60 Point<T> operator *(num /*T|int*/ factor) {
59 return new Point<T>( 61 return new Point<T>(
60 (x * factor) as dynamic/*=T*/, (y * factor) as dynamic/*=T*/); 62 (x * factor) as dynamic/*=T*/, (y * factor) as dynamic/*=T*/);
61 } 63 }
62 64
63 /** 65 /**
64 * Get the straight line (Euclidean) distance between the origin (0, 0) and 66 * Get the straight line (Euclidean) distance between the origin (0, 0) and
65 * this point. 67 * this point.
66 */ 68 */
67 double get magnitude => sqrt(x * x + y * y); 69 double get magnitude => sqrt(x * x + y * y);
68 70
(...skipping 11 matching lines...) Expand all
80 * 82 *
81 * 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
82 * required. 84 * required.
83 */ 85 */
84 T squaredDistanceTo(Point<T> other) { 86 T squaredDistanceTo(Point<T> other) {
85 var dx = x - other.x; 87 var dx = x - other.x;
86 var dy = y - other.y; 88 var dy = y - other.y;
87 return dx * dx + dy * dy; 89 return dx * dx + dy * dy;
88 } 90 }
89 } 91 }
OLDNEW
« no previous file with comments | « sdk/lib/math/math.dart ('k') | sdk/lib/math/rectangle.dart » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698