let distance = 0;

let deceleration = 3;

let shooting = 0;

let range;

let test;

let angle = 30;

function setup() {

  createCanvas(800, 800);

  frameRate(60);

  angleMode(DEGREES);

  background(220);

  range = pow(velocity - deceleration, 2) / (2 * deceleration);

  noFill();

  end = range / 90;

}

​

function draw() {

  background(220);

  harpoon();

  if(shooting === 1){

    velocity -= deceleration;

    distance += velocity;

  }

  else if(shooting === -1){

    distance -= velocity;

​

  }

  if(velocity < 0){

    velocity = distance / 15;

    shooting = -1;

  }

  if(distance < 0){

    distance = 0;

    shooting = 0;

    velocity = 60;

  }

}

​

function harpoon() {

  beginShape();

  for(let i = 0; i < distance; i++){

    vertex(sin(angle) * i, (sin(i * 6) * cos(distance / end) * (2 * range - distance - i) / 40 + 400));

  }

  endShape();

}

​

function mousePressed() {

  shooting = 1;

​

}

​

​