package com.sparshui.common;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.io.Serializable;
import javax.vecmath.Vector3f;
/**
* Represents a 2D location with float values.
*
* @author Jay Roltgen
*/
public class Location implements Serializable {
/**
*
*/
private static final long serialVersionUID = -3472243250219991476L;
private float _x;
private float _y;
/**
* Cosntruct a default location. Values are initialized
* as the coordinates (0, 0).
*/
public Location() {
_x = 0;
_y = 0;
}
/**
* Construct a specific location.
* @param x
* The x coordinate value of the location.
* @param y
* The y coordinate value of the location.
*/
public Location(float x, float y) {
_x = x;
_y = y;
}
/**
*
* @return
* The x coordinate value.
*/
public float getX() {
return _x;
}
/**
*
* @return
* The y coordinate value.
*/
public float getY() {
return _y;
}
public String toString() {
return "x = " + _x + ", y = " + _y
+ (_x < 1 && _x > 0 ? "("
+ pixelLocation(this).getX() + " " + pixelLocation(this).getY() + ")"
: "");
}
public float getDistance(Location location) {
float dx, dy;
return (float) Math.sqrt((dx = _x - location._x) * dx + (dy = _y - location._y) * dy);
}
public Vector3f getVector(Location location) {
return new Vector3f(location._x - _x, location._y - _y, 0);
}
public static Location getCenter(Location a, Location b) {
return getCentroid(a, b, 0.5f);
}
/**
* get weighted average location. w = 0 --> all a; w = 1 --> all b
*
* @param a
* @param b
* @param w
* @return Location
*/
public static Location getCentroid(Location a, Location b, float w) {
float w1 = 1 - w;
return new Location(a._x * w1 + b._x * w, a._y * w1 + b._y * w);
}
static final Dimension screenDim = Toolkit.getDefaultToolkit().getScreenSize();
public static Location pixelLocation(Location location) {
return location == null ? null : new Location(location.getX()
* screenDim.width, location.getY() * screenDim.height);
}
public static Location screenLocation(Location location) {
return (location == null ? null : new Location(location.getX()
/ screenDim.width, location.getY() / screenDim.height));
}
}