Java Pixel pixelValuesEqual(final double num1, final double num2)

Description

Compares two double values with the error margin of #PIXEL_EPSILON (i.e.

License

Apache License

Parameter

Parameter	Description
num1	the first value for which to compare equality
num2	the second value for which to compare equality

Return

true if the values are considered equals; false otherwise

Declaration

public static boolean pixelValuesEqual(final double num1, final double num2) 

Method Source Code

//package com.java2s;
/*//from  w  w  w  .j ava  2s  . c  o m
 * Copyright 2000-2016 Vaadin Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

public class Main {
    /**
     * The allowed value inaccuracy when comparing two double-typed pixel
     * values.
     * <p>
     * Since we're comparing pixels on a screen, epsilon must be less than 1.
     * 0.49 was deemed a perfectly fine and beautifully round number.
     */
    public static final double PIXEL_EPSILON = 0.49d;

    /**
     * Compares two double values with the error margin of
     * {@link #PIXEL_EPSILON} (i.e. {@value #PIXEL_EPSILON})
     *
     * @param num1
     *            the first value for which to compare equality
     * @param num2
     *            the second value for which to compare equality
     * @since 7.4
     *
     * @return true if the values are considered equals; false otherwise
     */
    public static boolean pixelValuesEqual(final double num1, final double num2) {
        return Math.abs(num1 - num2) <= PIXEL_EPSILON;
    }
}

Related

1. pixel_distance(int x1, int y1, int x2, int y2)
2. pixelRange(int p)
3. pixelSize(double lat, double lng, int zoom)
4. pixelSpacing(int n)
5. pixelsPerPanel(int n)