class Mover {

  PVector location;
  PVector velocity;
  PVector acceleration;
  float topspeed;
  float angle;

  Mover() {
    location = new PVector(random(0,width),random(0,height));
    velocity = new PVector(0,0);
    topspeed = 2.5;
  }

  // Updates the location of the mover
  void update(PVector _dir) {

    // 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);
    
    PVector target = PVector.add(location, _dir);
    
    // Rotat mover
    PVector temp_vector = PVector.sub(new PVector(width, location.y),location); // Make temp vector to be able to calculate angle
    angle = degrees(PVector.angleBetween(temp_vector, _dir)); // Get angel from direction and temp vector
    if(target.y < location.y) angle = angle * -1; // If target is over mover invert angle
    
    /* For debugging
    stroke(0);
    line(location.x,location.y,temp.x,temp.y);
    line(location.x,location.y,target.x,target.y);
    
    println(angle);
    println(location.x+",  "+location.y);
    println(temp.x+",  "+temp.y);*/
  }

  // Displays the mover
  void display() {
    
    int x1 = -10;
    int y1 = -5;
    int x2 = -10;
    int y2 = 5;
    int x3 = 10;
    int y3 = 0;
    
    pushMatrix();
    translate(location.x, location.y);
    rotate(radians(angle));
    fill(20);
    stroke(255);
    triangle(x1, y1, x2, y2, x3, y3);
    popMatrix();
    
  }
  
  // Detects what should hapen if contact with edge 
  void checkEdges() {
    if (location.x > width) {
      location.x = 0;
    } else if (location.x < 0) {
      location.x = width;
    }
    if (location.y > height) {
      location.y = 0;
    }  else if (location.y < 0) {
      location.y = height;
    }
  }
  
  // Check if car has reach the target
  boolean checkIfCarAtTarget(PVector target){
    if(abs(location.x - target.x) <= 5 && abs(location.y - target.y) <= 5){
      return false;
    }else return true;
  }
}