class Obstacle{
  
  PVector velocity;
  PVector acceleration;
  float topspeed;
  PVector location;
  PVector point1;
  PVector point2;
  boolean toPoint2;
  
  Obstacle(int _x, int _y, int _x2, int _y2){
    location = new PVector(_x, _y); 
    point1 = new PVector(_x, _y);
    point2 = new PVector(_x2, _y2); 
    toPoint2 = true;
    
    velocity = new PVector(0,0);
    topspeed = random(0.2, 1);
  }
  
  // Updates the location of the obstacle
  void update() {
    PVector _dir = new PVector(0,0);
    
    // Check the direction for the obstacle
    //if(toPoint2 && checkIfObstacleAtTarget(point2)) toPoint2 = false;
    //else if(!toPoint2 && checkIfObstacleAtTarget(point1)) toPoint2 = true;
    if(frameCount %5==0 && toPoint2 && checkIfObstacleAtTarget(point2)){ toPoint2 = false; }
    else if(frameCount %5==0 && !toPoint2 && checkIfObstacleAtTarget(point1)) toPoint2 = true;
    
    // Set the direction of the obstacle
    if(toPoint2) _dir = PVector.sub(point2, location);
    else _dir = PVector.sub(point1, location);
    
    // Our algorithm for calculating acceleration:
    //PVector dir = PVector.sub(target,location);  // Find vector pointing towards mouse
    _dir.normalize();     // Normalize
    _dir.mult(1);       // Scale 
    acceleration = _dir;  // Set to acceleration

    // Motion 101!  Velocity changes by acceleration.  Location changes by velocity.
    velocity.add(acceleration);
    velocity.limit(topspeed);
    location.add(velocity);  
  }
  
  // Displays the obstacle
  void display() {
    
    // Draw obstacle path
    fill(192);
    stroke(192);
    line(point1.x, point1.y, point2.x, point2.y);
    arc(point1.x, point1.y, 4, 4, 0, TWO_PI);
    arc(point2.x, point2.y, 4, 4, 0, TWO_PI);
    
    pushMatrix();
    translate(location.x, location.y);
    
    // Draw obsticales
    fill(255);
    noStroke();
    arc(0,0,20,20,0,TWO_PI);
    popMatrix();
  }
  
   boolean checkIfObstacleAtTarget(PVector target) { 
     if(abs(location.x - target.x) <= 5 && abs(location.y - target.y) <= 5) return true; 
    // if ((target.x - location.x <= 5) && (target.y - location.y <= 5)) return true; 
    else return false; 
  }
  
  
}