Springs processing file revised

From CSWiki

// Only changes I made are to move the new instances(?) of oscP5 and toChuck into void setup() thingy (routine?)

/**

* Springs
* by REAS <http://reas.com>
* 
* Move the mouse over one of the circles and click to re-position. 
* When you release the mouse, it will snap back into position. 
* Each circle has a slightly different behavior.  
* 
* Created 09 December 2002
*
* modified to send OSC data out to other software on localhost
*/

int num = 3; Spring[] springs = new Spring[num];

//osc stuff import oscP5.*; import netP5.*; OscP5 oscP5;

NetAddress toChuck;

void setup() {

 size(200, 200);
 noStroke(); 
 smooth();
 springs[0] = new Spring( 70, 160,  20, 0.98, 8.0, 0.1, springs, 0); 
 springs[1] = new Spring(150, 110,  60, 0.95, 9.0, 0.1, springs, 1); 
 springs[2] = new Spring( 40,  70, 120, 0.90, 9.9, 0.1, springs, 2); 
 frameRate(30);
 oscP5 = new OscP5(this,6449);
 toChuck = new NetAddress("localhost",6449);

}

void draw() {

 background(51); 
 
 for(int i=0; i<num; i++) { 
   springs[i].update(); 
   springs[i].draw(); 
 }  

}

void mousePressed() {

 for(int i=0; i<num; i++) { 
   springs[i].pressed(); 
 } 

}

void mouseReleased() {

 for(int i=0; i<num; i++) { 
   springs[i].released(); 
 } 

}

class Spring {

 // Screen values 
 float xpos, ypos;
 float tempxpos, tempypos; 
 int size = 20; 
 boolean over = false; 
 boolean move = false; 

 // Spring simulation constants 
 float mass;       // Mass 
 float k = 0.2;    // Spring constant 
 float damp;       // Damping 
 float rest_posx;  // Rest position X 
 float rest_posy;  // Rest position Y 

 // Spring simulation variables 
 //float pos = 20.0; // Position 
 float velx = 0.0;   // X Velocity 
 float vely = 0.0;   // Y Velocity 
 float accel = 0;    // Acceleration 
 float force = 0;    // Force 

 Spring[] friends;
 int me;
 
 // Constructor
 Spring(float x, float y, int s, float d, float m, 
        float k_in, Spring[] others, int id) 
 { 
   xpos = tempxpos = x; 
   ypos = tempypos = y;
   rest_posx = x;
   rest_posy = y;
   size = s;
   damp = d; 
   mass = m; 
   k = k_in;
   friends = others;
   me = id; 
 } 

 void update() 
 { 
   if(move) { 
     rest_posy = mouseY; 
     rest_posx = mouseX;
   } 

   force = -k * (tempypos - rest_posy);  // f=-ky 
   accel = force / mass;             // Set the acceleration, f=ma == a=f/m 
   vely = damp * (vely + accel);     // Set the velocity 
   tempypos = tempypos + vely;               // Updated position 

   force = -k * (tempxpos - rest_posx);  // f=-ky 
   accel = force / mass;             // Set the acceleration, f=ma == a=f/m 
   velx = damp * (velx + accel);     // Set the velocity 
   tempxpos = tempxpos + velx;               // Updated position 

   if((over() || move) && !otherOver() ) { 
     over = true; 
   } else { 
     over = false; 
   } 
   
   OscMessage springout = new OscMessage("/spring");
   springout.add(me); //int
   springout.add(tempxpos); //float
   springout.add(tempypos); //float
   oscP5.send(springout, toChuck); //send it to chuck
   //print(me, xpos);
 } 
 
 // Test to see if mouse is over this spring
 boolean over() {
   float disX = tempxpos - mouseX;
   float disY = tempypos - mouseY;
   if(sqrt(sq(disX) + sq(disY)) < size/2 ) {
     return true;
   } else {
     return false;
   }
 }
 
 // Make sure no other springs are active
 boolean otherOver() {
   for(int i=0; i<num; i++) {
     if(i != me) {
       if (friends[i].over == true) {
         return true;
       }
     }
   }
   return false;
 }

 void draw() 
 { 
   if(over) { 
     fill(153); 
   } else { 
     fill(255); 
   } 
   ellipse(tempxpos, tempypos, size, size);
 } 

 void pressed() 
 { 
   if(over) { 
     move = true; 
   } else { 
     move = false; 
   }  
 } 

 void released() 
 { 
   move = false; 
   rest_posx = xpos;
   rest_posy = ypos;
 } 

}