constructor(x1, y1, x2, y2) {

    this.p1 = createVector(x1, y1);

    this.p2 = createVector(x2, y2);

  }

​

  show() {

    line(this.p1.x, this.p1.y, this.p2.x, this.p2.y);

  }

}

​

class Curve {

  constructor(start_x, start_y, end_x, end_y) {

    this.start = createVector(start_x, start_y);

    this.end = createVector(end_x, end_y);

    this.points = [];

    this.lines = [];

  }

​

  createJitteredMidpoints(n) {

    for (let i = 0; i < n; i++) {

      let section = 1 / (n + 1);

      let pX = this.start.x + section * (i + 1) * (this.end.x - this.start.x);

      let pY = this.start.y + section * (i + 1) * (this.end.y - this.start.y);

      pX += randomGaussian(0,20);

      pY += randomGaussian(0,20);

      let p = createVector(pX, pY);

​

      this.points.push(p);

    }

  }

​

  makeCurve() {

    this.lines.push(

      new LineSeg(

        this.start.x,

        this.start.y,

        this.points[0].x,

        this.points[0].y

      )

    );

    for (let i = 0; i < this.points.length - 1; i++) {

      let start = this.points[i];

      let end = this.points[i + 1];

      this.lines.push(new LineSeg(start.x, start.y, end.x, end.y));

    }

    this.lines.push(

      new LineSeg(

        this.points[this.points.length - 1].x,

        this.points[this.points.length - 1].y,

        this.end.x,

        this.end.y

      )

    );

  }

​

  subdiv(n, segRate = 0.25) {

    this.createJitteredMidpoints(n);

    this.makeCurve();

    for (let i = 0; i < 5; i++) {

      this.chopLines(segRate);

      let newCurve = [];

      for (let i = 0; i < this.lines.length - 1; i++) {

        newCurve.push(this.lines[i]);

        let start = this.lines[i].p2;

        let end = this.lines[i + 1].p1;

        newCurve.push(new LineSeg(start.x, start.y, end.x, end.y));

      }

      newCurve.push(this.lines.pop());

      this.lines = newCurve;

    }

  }

​

  chopLines(segRate) {

    for (let i = 1; i < this.lines.length - 1; i++) {

      let x1 =

        this.lines[i].p1.x +

        segRate * (this.lines[i].p2.x - this.lines[i].p1.x);

      let y1 =

        this.lines[i].p1.y +

        segRate * (this.lines[i].p2.y - this.lines[i].p1.y);

      let x2 =

        this.lines[i].p1.x +

        (1 - segRate) * (this.lines[i].p2.x - this.lines[i].p1.x);

      let y2 =

        this.lines[i].p1.y +

        (1 - segRate) * (this.lines[i].p2.y - this.lines[i].p1.y);

​

      let newLine = new LineSeg(x1, y1, x2, y2);

      this.lines[i] = newLine;

    }

  }

​

  show() {

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

      this.lines[i].show();

    }

  }

}

​