com.sun.javafx.geom.Vec2d Maven / Gradle / Ivy
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* Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.javafx.geom;
/**
* A 2-dimensional, double-precision, floating-point vector.
*
*/
public class Vec2d {
/**
* The x coordinate.
*/
public double x;
/**
* The y coordinate.
*/
public double y;
public Vec2d() { }
public Vec2d(double x, double y) {
this.x = x;
this.y = y;
}
public Vec2d(Vec2d v) {
set(v);
}
public Vec2d(Vec2f v) {
set(v);
}
public void set(Vec2d v) {
this.x = v.x;
this.y = v.y;
}
public void set(Vec2f v) {
this.x = v.x;
this.y = v.y;
}
public void set(double x, double y) {
this.x = x;
this.y = y;
}
/**
* Returns the square of the distance between two points.
*
* @param x1 the X coordinate of the first specified point
* @param y1 the Y coordinate of the first specified point
* @param x2 the X coordinate of the second specified point
* @param y2 the Y coordinate of the second specified point
* @return the square of the distance between the two
* sets of specified coordinates.
*/
public static double distanceSq(double x1, double y1, double x2, double y2) {
x1 -= x2;
y1 -= y2;
return (x1 * x1 + y1 * y1);
}
/**
* Returns the distance between two points.
*
* @param x1 the X coordinate of the first specified point
* @param y1 the Y coordinate of the first specified point
* @param x2 the X coordinate of the second specified point
* @param y2 the Y coordinate of the second specified point
* @return the distance between the two sets of specified
* coordinates.
*/
public static double distance(double x1, double y1, double x2, double y2) {
x1 -= x2;
y1 -= y2;
return Math.sqrt(x1 * x1 + y1 * y1);
}
/**
* Returns the square of the distance from this
* Vec2d to a specified point.
*
* @param vx the X coordinate of the specified point to be measured
* against this Vec2d
* @param vy the Y coordinate of the specified point to be measured
* against this Vec2d
* @return the square of the distance between this
* Vec2d and the specified point.
*/
public double distanceSq(double vx, double vy) {
vx -= x;
vy -= y;
return (vx * vx + vy * vy);
}
/**
* Returns the square of the distance from this
* Vec2d to a specified Vec2d.
*
* @param v the specified point to be measured
* against this Vec2d
* @return the square of the distance between this
* Vec2d to a specified Vec2d.
*/
public double distanceSq(Vec2d v) {
double vx = v.x - this.x;
double vy = v.y - this.y;
return (vx * vx + vy * vy);
}
/**
* Returns the distance from this Vec2d to
* a specified point.
*
* @param vx the X coordinate of the specified point to be measured
* against this Vec2d
* @param vy the Y coordinate of the specified point to be measured
* against this Vec2d
* @return the distance between this Vec2d
* and a specified point.
*/
public double distance(double vx, double vy) {
vx -= x;
vy -= y;
return Math.sqrt(vx * vx + vy * vy);
}
/**
* Returns the distance from this Vec2d to a
* specified Vec2d.
*
* @param v the specified point to be measured
* against this Vec2d
* @return the distance between this Vec2d and
* the specified Vec2d.
*/
public double distance(Vec2d v) {
double vx = v.x - this.x;
double vy = v.y - this.y;
return Math.sqrt(vx * vx + vy * vy);
}
/**
* Returns the hashcode for this Vec2d.
* @return a hash code for this Vec2d.
*/
@Override
public int hashCode() {
long bits = 7L;
bits = 31L * bits + Double.doubleToLongBits(x);
bits = 31L * bits + Double.doubleToLongBits(y);
return (int) (bits ^ (bits >> 32));
}
/**
* Determines whether or not two 2D points or vectors are equal.
* Two instances of Vec2d are equal if the values of their
* x and y member fields, representing
* their position in the coordinate space, are the same.
* @param obj an object to be compared with this Vec2d
* @return true if the object to be compared is
* an instance of Vec2d and has
* the same values; false otherwise.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj instanceof Vec2d) {
Vec2d v = (Vec2d) obj;
return (x == v.x) && (y == v.y);
}
return false;
}
/**
* Returns a String that represents the value
* of this Vec2d.
* @return a string representation of this Vec2d.
*/
@Override
public String toString() {
return "Vec2d[" + x + ", " + y + "]";
}
}
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