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91 lines
3.5 KiB
Java
91 lines
3.5 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Android code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Kartikaya Gupta <kgupta@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package org.mozilla.gecko.gfx;
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import android.graphics.Point;
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import android.graphics.PointF;
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import org.json.JSONObject;
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import org.json.JSONException;
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import org.mozilla.gecko.FloatUtils;
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import java.lang.Math;
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public final class PointUtils {
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public static PointF add(PointF one, PointF two) {
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return new PointF(one.x + two.x, one.y + two.y);
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}
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public static PointF subtract(PointF one, PointF two) {
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return new PointF(one.x - two.x, one.y - two.y);
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}
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public static PointF scale(PointF point, float factor) {
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return new PointF(point.x * factor, point.y * factor);
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}
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public static Point round(PointF point) {
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return new Point(Math.round(point.x), Math.round(point.y));
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}
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/* Returns a new point that is a linear interpolation between start and end points. weight conrols the weighting
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* of each of the original points (weight = 1 returns endPoint, weight = 0 returns startPoint)
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*/
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public static PointF interpolate(PointF startPoint, PointF endPoint, float weight) {
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float x = FloatUtils.interpolate(startPoint.x, endPoint.x, weight);
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float y = FloatUtils.interpolate(startPoint.y, endPoint.y, weight);
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return new PointF(x, y);
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}
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/* Computes the magnitude of the given vector. */
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public static float distance(PointF point) {
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return (float)Math.sqrt(point.x * point.x + point.y * point.y);
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}
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public static JSONObject toJSON(PointF point) throws JSONException {
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// Ensure we put ints, not longs, because Gecko message handlers call getInt().
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int x = Math.round(point.x);
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int y = Math.round(point.y);
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JSONObject json = new JSONObject();
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json.put("x", x);
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json.put("y", y);
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return json;
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}
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}
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