rogue-savage-rats/src/mightypork/utils/math/Polar.java

package mightypork.utils.math;

import mightypork.utils.math.Calc.Deg;
import mightypork.utils.math.Calc.Rad;
import mightypork.utils.math.coord.Coord;


/**
 * Polar coordinate
 * 
 * @author MightyPork
 */
public class Polar {
	
	/** angle in radians */
	private double angle = 0;
	
	/** distance in units */
	private double radius = 0;
	
	
	/**
	 * Create a polar
	 * 
	 * @param angle
	 *            angle in RAD
	 * @param distance
	 *            distance from origin
	 */
	public Polar(double angle, double distance) {
		this(angle, false, distance);
	}
	
	
	/**
	 * Create a polar
	 * 
	 * @param angle
	 *            angle
	 * @param deg
	 *            angle is in DEG
	 * @param distance
	 *            radius
	 */
	public Polar(double angle, boolean deg, double distance) {
		this.radius = distance;
		this.angle = deg ? Deg.toRad(angle) : angle;
	}
	
	
	/**
	 * @return angle in RAD
	 */
	public double getAngle()
	{
		return angle;
	}
	
	
	/**
	 * @return angle in DEG
	 */
	public double getAngleDeg()
	{
		return Rad.toDeg(angle);
	}
	
	
	/**
	 * @param angle
	 *            angle in RAD
	 */
	public void setAngle(double angle)
	{
		this.angle = angle;
	}
	
	
	/**
	 * @param angle
	 *            angle in DEG
	 */
	public void setAngleDeg(double angle)
	{
		this.angle = Deg.toRad(angle);
	}
	
	
	/**
	 * @return radius
	 */
	public double getRadius()
	{
		return radius;
	}
	
	
	/**
	 * @param r
	 *            radius
	 */
	public void setRadius(double r)
	{
		this.radius = r;
	}
	
	
	/**
	 * Make polar from coord
	 * 
	 * @param coord
	 *            coord
	 * @return polar
	 */
	public static Polar fromCoord(Coord coord)
	{
		return new Polar(Math.atan2(coord.y, coord.x), Math.sqrt(Calc.square(coord.x) + Calc.square(coord.y)));
	}
	
	
	/**
	 * Make polar from coords
	 * 
	 * @param x
	 *            x coord
	 * @param y
	 *            y coord
	 * @return polar
	 */
	public static Polar fromCoord(double x, double y)
	{
		return Polar.fromCoord(new Coord(x, y));
	}
	
	
	/**
	 * Get coord from polar
	 * 
	 * @return coord
	 */
	public Coord toCoord()
	{
		return new Coord(radius * Math.cos(angle), radius * Math.sin(angle));
	}
	
	
	@Override
	public String toString()
	{
		return "Polar(" + angle + "rad, " + radius + ")";
	}
	
	
	@Override
	public int hashCode()
	{
		final int prime = 31;
		int result = 1;
		long temp;
		temp = Double.doubleToLongBits(angle);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		temp = Double.doubleToLongBits(radius);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		return result;
	}
	
	
	@Override
	public boolean equals(Object obj)
	{
		if (this == obj) return true;
		if (obj == null) return false;
		if (!(obj instanceof Polar)) return false;
		Polar other = (Polar) obj;
		if (Double.doubleToLongBits(angle) != Double.doubleToLongBits(other.angle)) return false;
		if (Double.doubleToLongBits(radius) != Double.doubleToLongBits(other.radius)) return false;
		return true;
	}
}