| // Copyright (c) 2001-2010, Purdue University. All rights reserved. |
| // Copyright (C) 2015 Apple Inc. All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // * Neither the name of the Purdue University nor the |
| // names of its contributors may be used to endorse or promote products |
| // derived from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY |
| // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| function Vector2D(x, y) { |
| this.x = x; |
| this.y = y; |
| } |
| |
| Vector2D.prototype.plus = function(other) { |
| return new Vector2D(this.x + other.x, |
| this.y + other.y); |
| }; |
| |
| Vector2D.prototype.minus = function(other) { |
| return new Vector2D(this.x - other.x, |
| this.y - other.y); |
| }; |
| |
| Vector2D.prototype.toString = function() { |
| return "[" + this.x + ", " + this.y + "]"; |
| }; |
| |
| Vector2D.prototype.compareTo = function(other) { |
| var result = compareNumbers(this.x, other.x); |
| if (result) |
| return result; |
| return compareNumbers(this.y, other.y); |
| }; |
| |