let aVel = 0;

let aAcc = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

}

​

let pAngle = 0;

​

function mouseDragged() {

  let v1 = createVector(pmouseX - width / 2, pmouseY - height / 2);

  pAngle = v1.heading();

}

​

function mouseReleased() {

  let v2 = createVector(mouseX - width / 2, mouseY - height / 2);

  aVel = v2.heading() - pAngle;

}

​

function draw() {

  // aAcc = map(mouseX, 0, width, -0.01, 0.01);

  // aVel = constrain(aVel, -0.2, 0.2);

  if (mouseIsPressed) {

    let v3 = createVector(mouseX - width / 2, mouseY - height / 2);

    a = v3.heading();

  }

  background(220);

  noStroke();

  rectMode(CENTER);

  translate(width / 2, height / 2);

  rotate(a);

  rect(0, 0, 100, 50);

​

  a += aVel;

  aVel += aAcc;

}

​