​

function drawControlPoints() {

  stroke(255, 0, 255, 200); // Change the color

  strokeWeight(10); // Make the points 10 pixels in size

​

  for (let i = 0; i < pointArray.length; i++)

    point(pointArray[i].x, pointArray[i].y);

}

​

function drawControlPointsLabel() {

  stroke(200);

  textSize(15);

  strokeWeight(1);

  noFill();

​

  for (let i = 0; i < pointArray.length; i++)

    text(i, pointArray[i].x, pointArray[i].y - 10);

}

​

function drawControlPolygon() {

  noFill();

  stroke('grey');

  strokeWeight(3);

​

  beginShape();

  for (let i = 0; i < pointArray.length; i++)

    vertex(pointArray[i].x, pointArray[i].y);

  endShape();

​

}

​

function highlightpoint() {

  stroke(255, 0, 0); // Change the color

  strokeWeight(10);

​

  if (weightpoint != -1)

    point(pointArray[weightpoint].x, pointArray[weightpoint].y);

}

​