constructor(x, y) {

    this.position = createVector(x, y);

    this.velocity = createVector(1, 0);

    this.acceleration = createVector(0, 0);

    this.r = 10;

    this.maxspeed = 2;

    this.maxforce = 2;

    this.wandertheta = 0.0;

  }

​

  //The pursue method is figuring out the predicted future position and calling the seek() method

  pursue(vehicle) {

    let target = vehicle.position.copy();

    let prediction = vehicle.velocity.copy();

    prediction.mult(10); //looking 10 steps ahead

    target.add(prediction);

    fill(0, 255, 0);

    circle(target.x, target.y, 10); //to visualise the prediction

    return this.seek(target);

  }

​

  evade(vehicle) {

    let pursuit = this.pursue(vehicle);

    pursuit.mult(-1);

    return pursuit;

  }

​

//   arrive(target) {

//     let desired = p5.Vector.sub(target, this.position);

//     let distance = desired.mag();

//     let r = 100; //our raduis for threshold

//     if(distance < r){

//       let m = map(distance, 0, r, 0, this.maxspeed);

//       desired.setMag(m);

//           }

//     else{

//           desired.setMag(this.maxspeed);

//     }

    let steer = p5.Vector.sub(desired, this.velocity);

    steer.limit(this.maxforce);

    return steer;

  }

  // seek(target) {

  //   let desired = p5.Vector.sub(target, this.position);

  //   desired.setMag(this.maxspeed);

  //   let steer = p5.Vector.sub(desired, this.velocity);

  //   steer.limit(this.maxforce);

  //   return steer;

  // }

​

  flee(target) {

    return this.seek(target).mult(-1);

  }

​

  applyForce(force) {

    this.acceleration.add(force);

  }

​

  update() {

    this.velocity.add(this.acceleration);

    this.velocity.limit(this.maxspeed);

    this.position.add(this.velocity);

    this.acceleration.mult(0);

  }

​

  show() {

    let angle = this.velocity.heading();

    fill(127);

    stroke(0);

    push();

    translate(this.position.x, this.position.y);

    rotate(angle);

    beginShape();

    triangle(-this.r, -this.r / 2, -this.r, this.r / 2, this.r, 0);

    endShape(CLOSE);

    pop();

  }

​

  edges() {

    if (this.position.x > width + this.r) {

      this.position.x = -this.r;

    } else if (this.position.x < -this.r) {

      this.position.x = width + this.r;

    }

    if (this.position.y > height + this.r) {

      this.position.y = -this.r;

    } else if (this.position.y < -this.r) {

      this.position.y = height + this.r;

    }

  }

// }

​

​