/**
Cube Monster by Eduardo Omine [2008-11-16]
http://blog.omine.net/
*/

class Cube
{
	int MAX_AGE = 100;
	float IMAX_AGE = 1.0 / MAX_AGE;
	Vec3 pos, vel, acc;
	float r, vr, dim;
	int age;
	boolean dead;
	
	Cube()
	{
		pos		= new Vec3();
		vel		= new Vec3();
		acc		= new Vec3();
		vr		= PI * random(-0.1, 0.1);
		dead	= true;
	}
	
	void reset(Vec2 p)
	{
		if(dead)
		{
			pos.set(p);
			vel.rand(-2, 2);
			acc.rand(-0.05, 0.05);
			r		= 0;
			age		= 0;
			dead	= false;
		}
	}
	
	void reset(Vec2 p, float a)
	{
		if(dead)
		{
			pos.set(p);
			vel.set(cos(a), sin(a), 0);
			acc.set(0, 0, 0);
			r		= 0;
			age		= 0;
			dead	= false;
		}
	}
	
	void update()
	{
		if(!dead)
		{
			vel.add(acc);
			pos.add(vel);
			r	+= vr;
			dim	= 10 * (1 - age * IMAX_AGE);
			age	+= 1;
			if(age >= MAX_AGE) dead = true;
		}
	}
	
	void draw()
	{
		if(!dead) drawBox(pos.x, pos.y, pos.z, dim, dim, dim, r);
	}
}