// Daniel Shiffman

// http://natureofcode.com

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// Path Following

​

​

class Path {

  constructor() {

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

    this.radius = 80;

    // 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(99);

    textSize(18);

    strokeWeight(1);//this.radius * 2);

    noFill();

    beginShape();

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

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

    }

    endShape();

    stroke(255);

    strokeWeight(1);

    noFill();

    beginShape();

    curveVertex(this.points[0].x, this.points[0].y);

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

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

    }

    let lastIndex = this.points.length - 1;

    let lastPoint = this.points[lastIndex];

    curveVertex(lastPoint.x, lastPoint.y);

    endShape();

  }

}