Here you can find the source of dist(float x1, float y1, float x2, float y2)
static public final float dist(float x1, float y1, float x2, float y2)
//package com.java2s; /**/* w ww.j av a2s.c om*/ * Copyright 2008 - 2011 * * 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. * * @project loonframework * @author chenpeng * @email?ceponline@yahoo.com.cn * @version 0.1 */ public class Main { static public final float dist(float x1, float y1, float x2, float y2) { return sqrt(sq(x2 - x1) + sq(y2 - y1)); } static public final float dist(float x1, float y1, float z1, float x2, float y2, float z2) { return sqrt(sq(x2 - x1) + sq(y2 - y1) + sq(z2 - z1)); } static public final float sqrt(float a) { return (float) Math.sqrt(a); } static public final float sq(float a) { return a * a; } }