Java tutorial
package org.opencv.core; //javadoc:Point3_ public class Point3 { public double x, y, z; public Point3(double x, double y, double z) { this.x = x; this.y = y; this.z = z; } public Point3() { this(0, 0, 0); } public Point3(Point p) { x = p.x; y = p.y; z = 0; } public Point3(double[] vals) { this(); set(vals); } public void set(double[] vals) { if (vals != null) { x = vals.length > 0 ? vals[0] : 0; y = vals.length > 1 ? vals[1] : 0; z = vals.length > 2 ? vals[2] : 0; } else { x = 0; y = 0; z = 0; } } public Point3 clone() { return new Point3(x, y, z); } public double dot(Point3 p) { return x * p.x + y * p.y + z * p.z; } public Point3 cross(Point3 p) { return new Point3(y * p.z - z * p.y, z * p.x - x * p.z, x * p.y - y * p.x); } @Override public int hashCode() { final int prime = 31; int result = 1; long temp; temp = Double.doubleToLongBits(x); result = prime * result + (int) (temp ^ (temp >>> 32)); temp = Double.doubleToLongBits(y); result = prime * result + (int) (temp ^ (temp >>> 32)); temp = Double.doubleToLongBits(z); result = prime * result + (int) (temp ^ (temp >>> 32)); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (!(obj instanceof Point3)) return false; Point3 it = (Point3) obj; return x == it.x && y == it.y && z == it.z; } @Override public String toString() { return "{" + x + ", " + y + ", " + z + "}"; } }