Ion Ceaun (ikogames)

Vezi solutiile trimise	Nume	Ion Ceaun
	Cont	ikogames
	Rating	466
	Statut	Utilizator normal
	Forum	trimite mesaj privat, vezi activitate

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Despre mine

(completeaza aici: studii, an de absolvire, institutie de invatamant, locatie, profesori pregatitori, site personal ...)

Distinctii primite

• AUR La Olimpiada De Ciorbarie
• AUR La Olimpiada De Mancaruri La Ceaun

Prieteni pe infoarena

• (completeaza aici: link-uri catre profilele altor utilizatori infoarena pe care ii cunosti)
  <style>
   #snowflakeContainer {
    position: absolute;
    left: 0px;
    top: 0px;
    display: none;
   }

 .snowflake {
position: fixed;
background-color: #CCC;
user-select: none;
z-index: 1000;
pointer-events: none;
border-radius: 50%;
width: 10px;
height: 10px;
}
</style>

<div id="snowflakeContainer">
<span class="snowflake"></span>
</div>

<script>
// Array to store our Snowflake objects
var snowflakes = [];

 // Global variables to store our browser's window size
var browserWidth;
var browserHeight;

 // Specify the number of snowflakes you want visible
var numberOfSnowflakes = 50;

 // Flag to reset the position of the snowflakes
var resetPosition = false;

 // Handle accessibility
var enableAnimations = false;
var reduceMotionQuery = matchMedia("(prefers-reduced-motion)");

 // Handle animation accessibility preferences
function setAccessibilityState() {
if (reduceMotionQuery.matches) {
enableAnimations = false;
} else {
enableAnimations = true;
}
}
setAccessibilityState();

 reduceMotionQuery.addListener(setAccessibilityState);

 //
// It all starts here...
//
function setup() {
if (enableAnimations) {
window.addEventListener("DOMContentLoaded", generateSnowflakes, false);
window.addEventListener("resize", setResetFlag, false);
}
}
setup();

 //
// Constructor for our Snowflake object
//
function Snowflake(element, speed, xPos, yPos) {
// set initial snowflake properties
this.element = element;
this.speed = speed;
this.xPos = xPos;
this.yPos = yPos;
this.scale = 1;

  // declare variables used for snowflake's motion
this.counter = 0;
this.sign = Math.random() < 0.5 ? 1 : -1;

  // setting an initial opacity and size for our snowflake
this.element.style.opacity = (.1 + Math.random()) / 3;
}

 //
// The function responsible for actually moving our snowflake
//
Snowflake.prototype.update = function () {
// using some trigonometry to determine our x and y position
this.counter += this.speed / 5000;
this.xPos += this.sign * this.speed * Math.cos(this.counter) / 40;
this.yPos += Math.sin(this.counter) / 40 + this.speed / 30;
this.scale = .5 + Math.abs(10 * Math.cos(this.counter) / 20);

  // setting our snowflake's position
setTransform(Math.round(this.xPos), Math.round(this.yPos), this.scale, this.element);

  // if snowflake goes below the browser window, move it back to the top
if (this.yPos > browserHeight) {
this.yPos = -50;
}
}

 //
// A performant way to set your snowflake's position and size
//
function setTransform(xPos, yPos, scale, el) {
el.style.transform = `translate3d(${xPos}px, px, 0) scale({scale}, ${scale})`;
}

 //
// The function responsible for creating the snowflake
//
function generateSnowflakes() {

  // get our snowflake element from the DOM and store it
var originalSnowflake = document.querySelector(".snowflake");

  // access our snowflake element's parent container
var snowflakeContainer = originalSnowflake.parentNode;
snowflakeContainer.style.display = "block";

  // get our browser's size
browserWidth = document.documentElement.clientWidth;
browserHeight = document.documentElement.clientHeight;

  // create each individual snowflake
for (var i = 0; i < numberOfSnowflakes; i++) {

  // clone our original snowflake and add it to snowflakeContainer
var snowflakeClone = originalSnowflake.cloneNode(true);
snowflakeContainer.appendChild(snowflakeClone);

  // set our snowflake's initial position and related properties
var initialXPos = getPosition(50, browserWidth);
var initialYPos = getPosition(50, browserHeight);
var speed = 5 + Math.random() * 40;

  // create our Snowflake object
var snowflakeObject = new Snowflake(snowflakeClone,
speed,
initialXPos,
initialYPos);
snowflakes.push(snowflakeObject);
}

  // remove the original snowflake because we no longer need it visible
snowflakeContainer.removeChild(originalSnowflake);

  moveSnowflakes();
}

 //
// Responsible for moving each snowflake by calling its update function
//
function moveSnowflakes() {

  if (enableAnimations) {
for (var i = 0; i < snowflakes.length; i++) {
var snowflake = snowflakes[i];
snowflake.update();
} 
}

  // Reset the position of all the snowflakes to a new value
if (resetPosition) {
browserWidth = document.documentElement.clientWidth;
browserHeight = document.documentElement.clientHeight;

  for (var i = 0; i < snowflakes.length; i++) {
var snowflake = snowflakes[i];

  snowflake.xPos = getPosition(50, browserWidth);
snowflake.yPos = getPosition(50, browserHeight);
}

  resetPosition = false;
}

  requestAnimationFrame(moveSnowflakes);
}

 //
// This function returns a number between (maximum - offset) and (maximum + offset)
//
function getPosition(offset, size) {
return Math.round(-1 * offset + Math.random() * (size + 2 * offset));
}

 //
// Trigger a reset of all the snowflakes' positions
//
function setResetFlag(e) {
resetPosition = true;
}
</script>
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