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package com.badlogic.gamedev.spaceinvaders.simulation;

import java.io.Serializable;

import android.util.FloatMath;

public class Vector implements Serializable
{
	public float x, y, z;
	
	public Vector( float x, float y, float z )
	{
		this.x = x;
		this.y = y;
		this.z = z;
	}
	
	public Vector( )
	{
		x = y = z = 0; 
	}
	
	public Vector( Vector v )
	{
		set( v );
	}
	
	public void set( Vector v )
	{
		this.x = v.x;
		this.y = v.y;
		this.z = v.z;
	}
	
	public Vector add( Vector v )
	{
		this.x += v.x;
		this.y += v.y;
		this.z += v.z;
		return this;
	}
	
	public Vector sub( Vector v )
	{
		this.x -= v.x;
		this.y -= v.y;
		this.z -= v.z;
		return this;
	}

	public void set(float x, float y, float z)
	{	
		this.x = x;
		this.y = y;
		this.z = z;
	}

	public float distance(Vector v) 
	{	
		float a = v.x - x;
		float b = v.y - y;
		float c = v.z - z;
		return FloatMath.sqrt( a * a + b * b + c * c );
	}	
}