this.sc = function(env)
      {
        var i, j; 
        
        for(j = 0; j < 4; j++)
        {
          for(i = 0; i < this.pointMasses.length; i++)
          {
            if(env.collision(this.pointMasses[i].getPos(), this.pointMasses[i].getPrevPos()) == true)
            {
              this.pointMasses[i].setFriction(0.75); 
            } 
            else 
            {
              this.pointMasses[i].setFriction(0.01); 
            }
          }
          for(i = 0; i < this.sticks.length; i++)
          {
            this.sticks[i].sc(env); 
          }
          for(i = 0; i < this.joints.length; i++)
          {
            this.joints[i].sc(); 
          }
        }
      }