constructor() {

    //a path has a radius, i.e how far is it ok for the vehicle to wander off

    this.radius = 20;

    //a Path is an array of points (p5.Vector objects)

    this.points = [];

  }

​

  //add a point to the path

  addPoint(x, y) {

    let point = createVector(x, y);

    this.points.push(point);

  }

​

  getStart() {

    return this.points[0];

  }

​

  getEnd() {

    return this.points[this.points.length - 1];

  }

​

​

  //draw the path

  display() {

    //draw thick line for radius

    stroke(100, 50);

    strokeWeight(this.radius * 2);

    noFill();

    beginShape();

    for (let i = 0; i < this.points.length; i++) {

      vertex(this.points[i].x, this.points[i].y);

    }

    endShape();

    //draw thin line for center of path

    stroke(100);

    strokeWeight(1);

    noFill();

    beginShape();

    for (let i = 0; i < this.points.length; i++) {

      vertex(this.points[i].x, this.points[i].y);

    }

    endShape();

  }

}

​