class Thingy
{
	private PVector last_loc;
	public PVector loc;
	public PVector acc;
	public PVector vel;
	public float mass;
	
	float grayscale = 0;
	float rv;
	float gv;
	float bv;
	float hv;
	float sv;
	float lv;
	float strokeW = 1;
	
	boolean dark = false;
	
	Thingy()
	{
		this.acc = new PVector(0,0);
		this.vel = new PVector(0,0);
		this.loc = new PVector(0,0);
		this.last_loc = new PVector(0,0);
		this.mass = 0;
		this.strokeW = 1;
	}
	
	
	Thingy(PVector initial_loc)
	{
		
		this.acc = new PVector(0,0);
		this.vel = new PVector(0,0);
		this.loc = initial_loc.get();
		this.last_loc = initial_loc.get();
		this.mass = random(0,1) * 1000 + 700;
		println("mass:" + this.mass);
		this.grayscale = 255;//map(random(1,5),1,5,0,255);
		
		if (back > 120)
		{
			dark = random(0,1) > 0.67;
		}
		else
		{
			dark = random(0,1) > 0.33;
		}
		
		
		if (dark)
		{
			rv = random(0,60);
			gv = random(0,60);
			bv = random(0,60);
			
			hv = random(0,360);
			sv = random(0,180);
			lv = random(0,180);
		}
		else
		{
			rv = random(120,255);
			gv = random(120,255);
			bv = random(120,255);
			
			hv = random(0,360);
			sv = random(180,360);
			lv = random(180,360);
		}
		
		
	}
	
	void applyForce(PVector force)
	{
		force.div(this.mass);
		this.acc.add(force);
	}
	
	void update()
	{
		this.vel.add(this.acc);
		this.loc.add(this.vel);
		//println(this.acc.mag());
		
		
	}
	
	void display()
	{
		//stroke(30);
		//noFill();
		//line(width/2, height/2, width/2 + this.acc.x * 100, height/2 + this.acc.y * 100);
		//line(this.loc.x, this.loc.y, this.loc.x + this.acc.x * 100, this.loc.y + this.acc.y * 100);
		
		/*
		noStroke();
		fill(255,0,0);
		ellipseMode(CENTER);
		ellipse(this.loc.x,this.loc.y,1,1);
		*/
		
		//stroke(grayscale,20);
		
		
		/*
		
		if (dark)
		{
			stroke(rv,gv,bv,80);
		}
		else
		{
			stroke(rv,gv,bv,15);
		}*/
		
		colorMode(HSB,360,360,360,100);
		
		stroke(hv,sv,lv,20);
		
		colorMode(RGB,255,255,255,100);
		
		
		
		if (!fix_stroke)
		{
			if (random(0,1) > 0.505)
			{
				if (strokeW < 10)
				{
					strokeW += 0.1;
				}

			}
			else if (strokeW > 0.1)
			{
				strokeW -= 0.1;
			}

			
		}
		
		strokeWeight(strokeW);
		line(this.loc.x,this.loc.y, this.last_loc.x, this.last_loc.y);
		this.last_loc = this.loc.get();
		
		this.acc.mult(0);
	}
	
}