The Tor Browser / file revision

 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-

  * This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 package org.mozilla.gecko.util;

 import android.graphics.PointF;

 import java.lang.IllegalArgumentException;

 public final class FloatUtils {

     private FloatUtils() {}

     public static boolean fuzzyEquals(float a, float b) {

         return (Math.abs(a - b) < 1e-6);

     }

     public static boolean fuzzyEquals(PointF a, PointF b) {

         return fuzzyEquals(a.x, b.x) && fuzzyEquals(a.y, b.y);

     }

     /*

      * Returns the value that represents a linear transition between `from` and `to` at time `t`,

      * which is on the scale [0, 1). Thus with t = 0.0f, this returns `from`; with t = 1.0f, this

      * returns `to`; with t = 0.5f, this returns the value halfway from `from` to `to`.

      */

     public static float interpolate(float from, float to, float t) {

         return from + (to - from) * t;

     }

     /**

      * Returns 'value', clamped so that it isn't any lower than 'low', and it

      * isn't any higher than 'high'.

      */

     public static float clamp(float value, float low, float high) {

         if (high < low) {

           throw new IllegalArgumentException(

               "clamp called with invalid parameters (" + high + " < " + low + ")" );

         }

         return Math.max(low, Math.min(high, value));

     }

 }