Java Distance Calculate distAlongRaySquared(double px, double py, double qx, double qy, double rx, double ry)

Here you can find the source of distAlongRaySquared(double px, double py, double qx, double qy, double rx, double ry)

Description

dist Along Ray Squared

License

Apache License

Declaration

public static double distAlongRaySquared(double px, double py, double qx, double qy, double rx, double ry) 

Method Source Code

//package com.java2s;
/*/*from www. j  a  v a2  s  .  c  o m*/
 * Copyright 2011 Mark McKay
 * 
 * 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 {
    public static double distAlongRaySquared(double px, double py, double qx, double qy, double rx, double ry) {
        double sx = px - qx;
        double sy = py - qy;

        double num = dot(sx, sy, rx, ry);
        return num * num / dot(rx, ry, rx, ry);
    }

    public static double dot(double ax, double ay, double bx, double by) {
        return ax * bx + ay * by;
    }

    public static int dot(int ax, int ay, int bx, int by) {
        return ax * bx + ay * by;
    }
}

Related

  1. dist(int p1, int p2)
  2. dist(int x1, int y1, int x2, int y2)
  3. dist14(double d12, double d23, double d34, double theta123, double theta234, double phi)
  4. dist2Degrees(double dist, double radius)
  5. dist2Radians(double dist, double radius)
  6. distance(double lat1, double lng1, double lat2, double lng2)
  7. distance(double lat1, double lng1, double lat2, double lng2)
  8. distance(double lat1, double lon1, double lat2, double lon2)
  9. distance(double lat1, double lon1, double lat2, double lon2)