class Ball{
	
	constructor(x, y, r, c){
		this.maxAcc = 0.5;
		this.r = r;
		this.pos = createVector(x, y);
		this.vel = createVector(0, 0);
		this.acc = createVector(0, 0);
		this.c = c;
	}
	
	attracted(){
		let att = createVector(0, 0), G = 50, g = 3;
		for (let a of attractions){
			let distV = p5.Vector.sub(a.pos, this.pos);
			distV.setMag(G * this.r * a.r / pow(this.pos.dist(a.pos), 2));
			att.add(distV.div(this.r));
		}
		if (gravity) att.y += g;
		this.acc = att;
		this.acc.limit(this.maxAcc);
	}
	
	move(){
		this.vel.add(this.acc);
		this.pos.add(this.vel);
	}
	
	show(){
		noStroke();
		fill(this.c);
		ellipse(this.pos.x, this.pos.y, this.r * 2);
	}
	
	debugInformation(){
		let velX = p5.Vector.mult(this.vel, 10).x;
		let velY = p5.Vector.mult(this.vel, 10).y;
		let accX = velX + p5.Vector.mult(this.acc, 100).x;
		let accY = velY + p5.Vector.mult(this.acc, 100).y;
		push();
		translate(this.pos.x, this.pos.y);
		strokeWeight(2);
		stroke(255, 0, 0);
		fill(255, 0, 0);
		line(0, 0, velX, velY);
		translate(velX, velY);
		rotate(this.vel.heading());
		beginShape();
		vertex(0, 0);
		vertex(-10, 10);
		vertex(-10, -10);
		endShape();
		rotate(-this.vel.heading());
		translate(-velX, -velY);
		stroke(0, 255, 0);
		fill(0, 255, 0);
		line(velX, velY, accX, accY);
		translate(accX, accY);
		rotate(this.acc.heading());
		beginShape();
		vertex(0, 0);
		vertex(-10, 10);
		vertex(-10, -10);
		endShape();
		rotate(-this.acc.heading());
		translate(-accX, -accY);
		pop();
	}
}