void doUI()
{
  background(40);
  noStroke();
  fill(60);
  rect(10,50,480,400);


  fill(120,140,155);  
  textFont(uifont,20);
  textMode(CORNER);  
  text("SPRING BODY",10,450);
  
  if(rawr.nodes.length>=maxNodes)
    fill(160,120,120);
  else
    fill(120);      
  textFont(uifont,12);  
  text("point mass: "+rawr.nodes.length,10,20);  
  
  fill(120);      
  text("spring tension: "+float(int(rawr.tension*1000))/1000,90,20);    
  text("collision tension: "+float(int(rawr.collisionTension*1000))/1000,90,30);      
  
  text("friction constant: "+FRICTION_FORCE,200,20);  
  text("display mode: "+displayMode,200,30);
  
  fill(150);
  textFont(uifont,15);
  text("key",20,476);
  
  textFont(uifont,12);
  if(key=='p'||playMode)
    fill(120,220,190);        
  else
    fill(150);  
  text("'p' play mode",55,470);
  
  if(key=='1'||key=='2')
    fill(120,220,190);        
  else
    fill(150);
  text("'1-2' display modes",55,488);    
    

/*  if(key=='+')
    fill(220,190,190);              
  else
    fill(150);  
  text("'+' add node",55,488);  */
  
  if(key=='[')
    fill(220,190,190);        
  else
    fill(150);  
  text("'[' decrease tension",150,470);    
  if(key==']')
    fill(220,190,190);        
  else
    fill(150);    
  text("']' increase tension",150,488);      
  if(key=='g' || useGravity)
    fill(120,220,190);        
  else
    fill(150);    
  text("'g' toggle gravity",255,470);        
  
  if(key=='c')
    fill(220,190,190);        
  else
    fill(150);    
  text("'c' clear",255,488);     
  
  if(key=='s'||useSmooth)
    fill(220,190,190);
  else
    fill(150);
  text("'s' anti-alias",345,470);
  
  
  
  
  
  
  
  
  
/*  for(int i=0;i<rawr.nodes.length;i++)
  {
    if(rawr.nodes[i].velocity.m==0)
      fill(120);
    else
      fill(150);
    text(rawr.nodes[i].velocity.m,460,20+i*10);
  }*/
}


void keyPressed()
{
  if(key=='p'&&rawr.nodes!=null&&rawr.nodes.length!=0)
  {
    if(!playMode)
      playMode=true;
    else
      playMode=false;
  }
  if(key=='g')
  {
    if(useGravity==false)
      useGravity=true;
    else
      useGravity=false;
  }
  if(key=='['&&rawr.tension>0.01)
    rawr.tension-=0.005;  
  if(key==']'&&rawr.tension<0.7)  
    rawr.tension+=0.005;
  if(key=='c')
  {
    playMode=false;
    selected=null;
    rawr=new lattice(0);
  }  
  
  if(key=='1'||key=='2')
    displayMode=int(key)-48;
  if(key=='s')
  {
    if(useSmooth)
    {
      useSmooth=false;
      noSmooth();
    }
    else
    {
      useSmooth=true;
      smooth();
    }
  }
}
void keyReleased()
{
  key=' ';
}