​

class Vehicle {

  constructor(x, y) {

    this.acceleration = createVector(0, 0);

    this.velocity = createVector(3, 3);

    this.position = createVector(x, y);

    this.r = 6;

    this.maxspeed = 5;

    this.maxforce = 0.35;

  }

​

  // Method to update location

  update() {

    // Update velocity

    this.velocity.add(this.acceleration);

    // Limit speed

    this.velocity.limit(this.maxspeed);

    this.position.add(this.velocity);

    // Reset accelerationelertion to 0 each cycle

    this.acceleration.mult(0);

  }

​

  boundaries(offset){

    let desired=null;

    if (this.position.x < offset) {

    desired = createVector(this.maxspeed, this.velocity.y);

    }

    else if (this.position > width - offset) {

    desired = createVector(-this.maxspeed, this.velocity.y)

    }

    if (this.position.y < offset) {

    desired = createVector(this.velocity.x, this.maxspeed);

    }

    else if (this.position.y > height - offset) {

    desired = createVector(this.velocity.x, -this.maxspeed)

    }

    if (desired !== null) {

    desired.normalize();

    desired.mult(this.maxspeed);

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

    steer.limit (this.maxforce);

    this.applyForce(steer);

    }

  }

  applyForce(force) {

    // We could add mass here if we want A = F / M

    this.acceleration.add(force);

  }

​

​

​

  show() {

    // Draw a triangle rotated in the direction of velocity

    let angle = this.velocity.heading();

    fill(127);

    stroke(0);

    strokeWeight(2);

    push();

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

    rotate(angle);

    beginShape();

    vertex(this.r * 2, 0);

    vertex(-this.r * 2, -this.r);

    vertex(-this.r * 2, this.r);

    endShape(CLOSE);

    pop();

  }

}

​