int att_count = 300;
int thing_count = 4;

Thingy []things = new Thingy[thing_count];
Attracter []attracters = new Attracter[att_count];

boolean show_att = false;
boolean fix_stroke = true;

int back = 230;

void setup() 
{
	size(800,450);
	smooth();
	
	initme();
}

void initme()
{
	
	background(back);
	
	for (int i = 0; i < thing_count ; i++)
	{
		things[i] = new Thingy(new PVector(random(0,width),random(0,height)));
		things[i].vel = new PVector(random(0,width),random(0,height));
		things[i].vel.normalize();
		things[i].vel.mult(random(1,15));
	}
	
	for (int i = 0; i < att_count ; i++)
	{
		attracters[i] = new Attracter(random(1,100));
		attracters[i].activated = true;
	}
	
	println("---");
}

void draw()
{
	
	if ((millis() % 50) == 0)
	{
		noStroke();
		fill(back,1);
		rect(0,0,width,height);
	}
	//background(255,5);
	for (int i = 0; i < att_count ; i++)
	{
		attracters[i].update();
		
		for (int j = 0; j < thing_count ; j++)
		{
			PVector force = PVector.sub(things[j].loc, attracters[i].loc);
			force.normalize();
			force.mult(-1 * attracters[i].strength);
			
			things[j].applyForce(force);
			things[j].update();
			things[j].display();
		}
		
		if (show_att)
		{
			attracters[i].display();
		}
	}
	
	
	
	
}

void keyPressed()
{
	if (key == 'p')
	{
		saveFrame("########.tif");
	}
	if (key == ' ')
	{
		initme();
	}
	if (key == 'a')
	{
		show_att = !show_att;
		
		println("show attractor:" + show_att);
	}
	
	if (key == 'x')
	{
		fix_stroke = !fix_stroke;
	}
	
	if (key == 'b')
	{
		if (back > 120)
		{
			back = 30;
		}
		else
		{
			back = 230;
		}
		
		initme();
	}
}