// Mutual Attraction
// Daniel Shiffman <http://www.shiffman.net>

// adapted for use with Max/MSP by Adam Parrish

// Mouse click resets all bodies to random locations
// Key press turns on and off vector display

// Created 2 May 2005
import noc.*;
//import maxlink.*;

int MAX = 3;
Thing[] t = new Thing[MAX];
Thing mthing;
long lastReset = 0;
long resetWait = 20000;
//MaxLink lnk;

void setup() {
  size(640,480);
  smooth();
  frameRate(30);
  colorMode(RGB,255,255,255,100);
  reset();
//  lnk = new MaxLink(this, "attractmax");
}

void draw() {
  background(0);
  
  for (int i = 0; i < t.length; i++) {          // For every Thing t[i]
    for (int j = 0; j < t.length; j++) {        // For every Thing t[j]
      if (i != j) {                             // Make sure we are not calculating gravtional pull on oneself
        Vector3D f = t[i].calcGravForce(t[j]);  // Use the function we wrote above
        t[i].add_force(f);                      // Add the force to the object to affect its acceleration
      }
    }
    t[i].go();       // Implement the rest of the object's functionality
    
    // send values to max
/*    float cx = constrain(100+t[i].loc.x, 0, 1000);
    float cy = constrain(100+t[i].loc.y, 0, 1000);
    lnk.output(i*2, cx);
    lnk.output((i*2)+1, cy); */
  }
  
  if (lastReset + resetWait < millis()) {
    reset();
    lastReset = millis();
  }
    
}

void reset() {
  // Some random bodies
  for (int i = 0; i < t.length; i++) {
    Vector3D ac = new Vector3D(0.0,0.0);
    Vector3D ve = new Vector3D(random(-1, 1),random(-1, 1));
    Vector3D lo = new Vector3D(random(40+(width-40)),random(40+(height-40)));
    t[i] = new Thing(ac,ve,lo,random(1,100));
  }
}

void mousePressed() {
  reset();
  lastReset = millis();
}