mobile/android/base/gfx/PointUtils.java@6474c204b198 (annotated)
mobile/android/base/gfx/PointUtils.java
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- |
| michael@0 | 2 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | package org.mozilla.gecko.gfx; |
| michael@0 | 7 | |
| michael@0 | 8 | import org.json.JSONException; |
| michael@0 | 9 | import org.json.JSONObject; |
| michael@0 | 10 | |
| michael@0 | 11 | import android.graphics.Point; |
| michael@0 | 12 | import android.graphics.PointF; |
| michael@0 | 13 | |
| michael@0 | 14 | public final class PointUtils { |
| michael@0 | 15 | public static PointF add(PointF one, PointF two) { |
| michael@0 | 16 | return new PointF(one.x + two.x, one.y + two.y); |
| michael@0 | 17 | } |
| michael@0 | 18 | |
| michael@0 | 19 | public static PointF subtract(PointF one, PointF two) { |
| michael@0 | 20 | return new PointF(one.x - two.x, one.y - two.y); |
| michael@0 | 21 | } |
| michael@0 | 22 | |
| michael@0 | 23 | public static PointF scale(PointF point, float factor) { |
| michael@0 | 24 | return new PointF(point.x * factor, point.y * factor); |
| michael@0 | 25 | } |
| michael@0 | 26 | |
| michael@0 | 27 | public static Point round(PointF point) { |
| michael@0 | 28 | return new Point(Math.round(point.x), Math.round(point.y)); |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | /* Computes the magnitude of the given vector. */ |
| michael@0 | 32 | public static float distance(PointF point) { |
| michael@0 | 33 | return (float)Math.sqrt(point.x * point.x + point.y * point.y); |
| michael@0 | 34 | } |
| michael@0 | 35 | |
| michael@0 | 36 | /** Computes the scalar distance between two points. */ |
| michael@0 | 37 | public static float distance(PointF one, PointF two) { |
| michael@0 | 38 | return PointF.length(one.x - two.x, one.y - two.y); |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | public static JSONObject toJSON(PointF point) throws JSONException { |
| michael@0 | 42 | // Ensure we put ints, not longs, because Gecko message handlers call getInt(). |
| michael@0 | 43 | int x = Math.round(point.x); |
| michael@0 | 44 | int y = Math.round(point.y); |
| michael@0 | 45 | JSONObject json = new JSONObject(); |
| michael@0 | 46 | json.put("x", x); |
| michael@0 | 47 | json.put("y", y); |
| michael@0 | 48 | return json; |
| michael@0 | 49 | } |
| michael@0 | 50 | } |
| michael@0 | 51 |
