Java examples for java.lang:Math Geometry Distance
Square distance between a point and a line defined by two other points.
//package com.java2s; import java.awt.geom.*; public class Main { /**//from w ww .j av a 2 s . c o m * Square distance between a point and a line defined by two other points. * See http://mathworld.wolfram.com/Point-LineDistance2-Dimensional.html * @param x0 The point not on the line. * @param y0 The point not on the line. * @param x1 A point on the line. * @param y1 A point on the line. * @param x2 Another point on the line. * @param y2 Another point on the line. */ public static double pointLineDistanceSquare(double x0, double y0, double x1, double y1, double x2, double y2) { final double x2_x1 = x2 - x1; final double y2_y1 = y2 - y1; final double d = (x2_x1) * (y1 - y0) - (x1 - x0) * (y2_y1); final double denominator = x2_x1 * x2_x1 + y2_y1 * y2_y1; return d * d / denominator; } /** * Square distance between a point and a line defined by two other points. * See http://mathworld.wolfram.com/Point-LineDistance2-Dimensional.html * @param p0 The point not on the line. * @param p1 A point on the line. * @param p2 Another point on the line. */ public static double pointLineDistanceSquare(Point2D p0, Point2D p1, Point2D p2) { return pointLineDistanceSquare(p0.getX(), p0.getY(), p1.getX(), p1.getY(), p2.getX(), p2.getY()); } }