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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <canvas id="rain"></canvas>
<link href="https://fonts.googleapis.com/css?family=Gayathri&display=swap" rel="stylesheet">

<div id="container">
  <h1>Raindrop</h1>
  <div id="options">
    <button class="raindrop">About us</button>
    <button class="raindrop">Learn More</button>
    <button class="raindrop">Contact</button>
  </div>
</div>
            
          
!
            
              html,body{
  padding: 0px;
  margin: 0px;
  height: 100%;
  overflow: hidden;
  background: black;
  font-family: 'Gayathri', sans-serif;
}

#rain{
  position: absolute;
  left: 0px;
  top: 0px;
  user-select: none;
}

h1{
  text-align: center;
  margin-top: 130px;
  font-size: 42px;
  position: relative;
  color: white;
}

#options{
  text-align: center;
  margin-top: 50px;
  position: relative;
  z-index: 2;
}

#options button{
  padding: 20px;
  font-size: 22px;
  margin-left: 20px;
  margin-right: 20px;
  border-radius: 5px;
  cursor: pointer;
  background: white;
  border: 1px solid #95a5a6;
}

@media only screen and (max-width: 600px) {
  .raindrop:nth-child(3) {
    display: none;
  }
}
            
          
!
            
              var c = document.getElementById("rain");

c.width = window.innerWidth;
c.height = window.innerHeight;

var ctx = c.getContext("2d");

let rainDrops = [];
let elements = document.getElementsByClassName("raindrop");
let length = 30;
let speed = 15;

let angle = 90 * Math.PI / 180;
let angleSin = Math.sin(angle);
let angleCos = Math.cos(angle);

let spawnInterval = setInterval(newDrop, 50);

window.addEventListener("resize", onResize);

document.addEventListener("visibilitychange", function() {
  if (document.hidden) {
    clearInterval(spawnInterval);
  } else {
    spawnInterval = setInterval(newDrop, 50);
  }
});

function RainDrop(x, y, angle) {
  this.x = x;
  this.y = y;
  rainDrops.push(this);
}

function newDrop() {
  for (let x = 0; x < 50; x++) {
    new RainDrop(Math.random() * c.width, -40 - 100 * Math.random(), angle);
  }
}

update();

function update() {
  for (let x = 0; x < rainDrops.length; x++) {
    let drop = rainDrops[x];
    drop.x += speed * angleCos;
    drop.y += speed * angleSin;

    drop.endX = drop.x + length * angleCos;
    drop.endY = drop.y + length * angleSin;

    if (drop.y > c.height) {
      rainDrops.splice(x, 1);
      x--;
    }
  }

  //checkCollisions();
  draw();
}

function draw() {
  ctx.clearRect(0, 0, c.width, c.height);

  ctx.lineWidth = 1;
  ctx.lineCap = "round";
  ctx.strokeStyle = "#0984e3";

  let gradient = ctx.createLinearGradient(0, 0, 0, c.height);

  gradient.addColorStop(0, "#00a8ff");
  gradient.addColorStop(0.6, "#00a8ff");
  gradient.addColorStop(1, "white");

  ctx.strokeStyle = gradient;

  ctx.beginPath();
  for (let i = 0; i < rainDrops.length; i++) {
    ctx.moveTo(Math.floor(rainDrops[i].x), Math.floor(rainDrops[i].y));
    ctx.lineTo(Math.floor(rainDrops[i].endX), Math.floor(rainDrops[i].endY));
  }
  ctx.stroke();

  clearRegions();
  window.requestAnimationFrame(update);
}

function onResize() {
  c.width = window.innerWidth;
  c.height = window.innerHeight;
}

function clearRegions() {
  ctx.globalCompositeOperation = "destination-out";

  for (let i = 0; i < elements.length; i++) {
    let boundingBox = elements[i].getBoundingClientRect();
    let yDistanceBottom = c.height - boundingBox.bottom;
    let yDistanceTop = c.height - boundingBox.top;

    let bottomLeftX =
      boundingBox.left + yDistanceBottom * Math.tan(Math.PI / 2 - angle);
    let bottomRightX =
      boundingBox.right + yDistanceBottom * Math.tan(Math.PI / 2 - angle);

    let bottomLeftX2 =
      boundingBox.left + yDistanceTop * Math.tan(Math.PI / 2 - angle);
    let bottomRightX2 =
      boundingBox.right + yDistanceTop * Math.tan(Math.PI / 2 - angle);

    //From bottom of element to edge of page
    ctx.beginPath();
    ctx.moveTo(boundingBox.left, boundingBox.bottom);
    ctx.lineTo(bottomLeftX, c.height);
    ctx.lineTo(bottomRightX, c.height);
    ctx.lineTo(boundingBox.right, boundingBox.bottom);
    ctx.closePath();
    ctx.fill();

    //From top of element to edge of page
    ctx.beginPath();
    ctx.moveTo(boundingBox.left, boundingBox.top);
    ctx.lineTo(bottomLeftX2, c.height);
    ctx.lineTo(bottomRightX2, c.height);
    ctx.lineTo(boundingBox.right, boundingBox.top);
    ctx.closePath();
    ctx.fill();
  }

  ctx.globalCompositeOperation = "source-over";
}

            
          
!
999px
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