import java.util.ArrayList;

//	 Declare a "Bling" object
	ArrayList blings;
	float rotation;
	boolean showVectors = false;
	int numBlings = 0;
	
	void setup() {
	  size(800,600, P3D);//download & change P3D to OPENGL for better performance
	  framerate(30);
	  //smooth();
	  lights();
	  // Create the thing object
	  blings = new ArrayList();
	  for(int i = 0; i < numBlings; i++) {
		  blings.add(new Bling(new Vector3D(25f * i,20f * i, 15f*i),new Vector3D(1.5f,2f,1f), new Vector3D(0f,0f,0f),(Math.random() < 0.5f)?0:1));
	  }

	}

	void draw() {
	  lights();
	  background(100);
	  pushMatrix();
	  translate(width/2,height/2,0);
	  //rotateX(rotation*2.5f);
	  rotateY(rotation);
	  //rotateZ(rotation*0.5f);
	  stroke(70);
	  noFill();
	  fill(200,200,200,50);
	  //box(316);
	  sphereDetail(30);
	  sphere(316);
	  
	  sphereDetail(6);
	  for(int i = 0; i < blings.size(); i++) {
		  Bling bi = (Bling)blings.get(i);
		  bi.acc = new Vector3D(0,0,0);
		  for(int j = 0; j < blings.size(); j++) {
			  if(i != j) {
				  Bling bj = (Bling)blings.get(j);
				  float dist = Vector3D.distance(bi.loc,bj.loc);
				  dist *= dist;
				  if(bi.type != bj.type) {
				 	bi.acc.add(Vector3D.div(Vector3D.mult(Vector3D.sub(bj.loc,bi.loc),100f),dist));
				  }
				  else {
					  bi.acc.sub(Vector3D.div(Vector3D.mult(Vector3D.sub(bj.loc,bi.loc),100f),dist));
				  }
				  bi.acc.limit(10f);
			  }
		  }
	  }
	  
	  // Run the "Bling" object
	  for(int i=0;i<blings.size();i++){
	    Bling z = (Bling) blings.get(i);
	    z.go();
	  }
	  popMatrix();
	  rotation +=.01;

	}

//	 Renders a vector object 'v' as an arrow and a location 'loc'
	void drawVector(Vector3D v, Vector3D loc, float scayl) {
	  pushMatrix();
	  float arrowsize = 4;
	  // Translate to location to render vector
	  translate(loc.x,loc.y,loc.z);
	  stroke(255);
	  // Call vector heading function to get direction (note that pointing up is a heading of 0) and rotate
	  rotate(v.heading2D());
	  // Calculate length of vector & scale it to be bigger or smaller if necessary
	  float len = v.magnitude()*scayl;
	  // Draw three lines to make an arrow (draw pointing up since we've rotate to the proper direction)
	  line(0,0,len,0);
	  line(len,0,len-arrowsize,+arrowsize/2);
	  line(len,0,len-arrowsize,-arrowsize/2);
	  popMatrix();
	  
	} 
	
	void keyPressed() {
		println("press");
		if (key == 'r') {
			blings.add(new Bling(new Vector3D(100f, 50f, 50f), new Vector3D(
					1.5f, 2f, 1f), new Vector3D(0f, 0f, 0f), 0));
		} else if (key == 'b') {
			blings.add(new Bling(new Vector3D(100f, 50f, 50f), new Vector3D(
					1.5f, 2f, 1f), new Vector3D(0f, 0f, 0f), 1));
		}
	}