float FRICTION_FORCE=0.9;
vector GRAVITY_VECTOR=new vector(270,2);
lattice rawr;
int nodeAmount=0;
boolean useGravity=false;
boolean playMode=false;
boolean useSmooth=false;

int displayMode=1;

int maxNodes=300;

mass selected=null;

PFont uifont;
void setup()
{
  size(500,500);
  ellipseMode(CENTER);
  rectMode(CORNER);

  rawr=new lattice(nodeAmount);
  uifont=loadFont("KnockoutHTF30JuniorWelterwt-48.vlw");

//  smooth();    
}

void draw()
{
  doUI();    
  if(mousePressed)
  {
    if(!playMode)
      rawr.addNode();
  }  
  if(playMode)
  {
    playMode();   
  }
  rawr.update();
  if(displayMode==1)
    rawr.drawLattice();  
  if(displayMode==2)
    rawr.drawCells();    
}

void playMode()
{
  if(rawr!=null&&rawr.nodes!=null)
  {  
    if(selected==null)
      selected=rawr.nodes[0];
    position mp=new position(mouseX,mouseY);      
    for(int i=0;i<rawr.nodes.length;i++)
    {
      float distanceNow=dist(mp,selected.p);
      if(dist(mp,rawr.nodes[i].p)<distanceNow)
      {   
        if(!mousePressed)              
          selected=rawr.nodes[i];
      }
    }    
    if(mousePressed)
    {
      vector v=new vector(selected.p,mp);
      v.m*=.1;
      selected.velocity=selected.velocity.add(v);   
      noFill();    
      stroke(160,180,190,230);
      ellipse(selected.p.x,selected.p.y,10,10);       
    }
    else
    {
      noFill();    
      stroke(160,160,180,100);
      ellipse(selected.p.x,selected.p.y,16,16);      
      line(selected.p.x,selected.p.y,mp.x,mp.y);            
    }
  }
}
void mouseReleased()
{
  

}