function exercise 1

let sliderSize;

let sliderInternalSize;

let sliderPoints;

​

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  noStroke();

  sliderSize = createSlider(20, 400, 40);

  sliderSize.position(10, 10);

  sliderInternalSize = createSlider(20, 400);

  sliderInternalSize.position(10, 40);

  sliderPoints = createSlider(3, 20);

  sliderPoints.position(10, 70);

}

​

function draw() {

  background("#7AF0ED");

  fill("#F06E85");

  let size = sliderSize.value();

  let internalSize = sliderInternalSize.value();

  let points = sliderPoints.value();

  star (width/2, height/2, points, size, internalSize);

}

​

function star (x, y, points, size, internalSize) {

  let centralAngle = TWO_PI / points;

  beginShape();

  for (let a = 0; a < points; a ++) {

    var angle = a*centralAngle - HALF_PI;

    let vx = x + cos(angle) * size;

    let vy = y + sin(angle) * size;

    vertex(vx, vy); 

    var angleInternal = a*centralAngle + centralAngle/2 -HALF_PI;

    vx = x + cos(angleInternal) * internalSize;

    vy = y + sin(angleInternal) * internalSize;

    vertex(vx, vy); 

  }

​

​

  endShape(CLOSE);

}

​