Html5-canvas-snow-effect

from http://thecodeplayer.com/walkthrough/html5-canvas-snow-effect What is a html5-canvas-snow-effect How do you make a html5-canvas-snow-effect? This script and codes were developed by Mariam Massadeh on 26 November 2021, Friday.

How do I make an html5-canvas-snow-effect?
  1. Html5-canvas-snow-effect Previews
  2. Html5-canvas-snow-effect HTML Codes
  3. Html5-canvas-snow-effect CSS Codes
  4. Html5-canvas-snow-effect JS Codes
Html5-canvas-snow-effect Previews

Html5-canvas-snow-effect HTML Codes

<!DOCTYPE html>
<html >
<head>
  <meta charset="UTF-8">
  <title>html5-canvas-snow-effect</title>
  
  
  
      <link rel="stylesheet" href="css/style.css">

  
</head>

<body>
  <canvas id="canvas"></canvas>
  <script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>

    <script src="js/index.js"></script>

</body>
</html>

Html5-canvas-snow-effect CSS Codes

/*Simple reset*/
* {margin: 0; padding: 0;}

body {
	/*You can use any kind of background here.*/
	background: #6b92b9;
}
canvas {
	display: block;
}

Html5-canvas-snow-effect JS Codes

window.onload = function(){
	//canvas init
	var canvas = document.getElementById("canvas");
	var ctx = canvas.getContext("2d");
	
	//canvas dimensions
	var W = window.innerWidth;
	var H = window.innerHeight;
	canvas.width = W;
	canvas.height = H;
	
	//snowflake particles
	var mp = 25; //max particles
	var particles = [];
	for(var i = 0; i < mp; i++)
	{
		particles.push({
			x: Math.random()*W, //x-coordinate
			y: Math.random()*H, //y-coordinate
			r: Math.random()*4+1, //radius
			d: Math.random()*mp //density
		})
	}
	
	//Lets draw the flakes
	function draw()
	{
		ctx.clearRect(0, 0, W, H);
		
		ctx.fillStyle = "rgba(255, 255, 255, 0.8)";
		ctx.beginPath();
		for(var i = 0; i < mp; i++)
		{
			var p = particles[i];
			ctx.moveTo(p.x, p.y);
			ctx.arc(p.x, p.y, p.r, 0, Math.PI*2, true);
		}
		ctx.fill();
		update();
	}
	
	//Function to move the snowflakes
	//angle will be an ongoing incremental flag. Sin and Cos functions will be applied to it to create vertical and horizontal movements of the flakes
	var angle = 0;
	function update()
	{
		angle += 0.01;
		for(var i = 0; i < mp; i++)
		{
			var p = particles[i];
			//Updating X and Y coordinates
			//We will add 1 to the cos function to prevent negative values which will lead flakes to move upwards
			//Every particle has its own density which can be used to make the downward movement different for each flake
			//Lets make it more random by adding in the radius
			p.y += Math.cos(angle+p.d) + 1 + p.r/2;
			p.x += Math.sin(angle) * 2;
			
			//Sending flakes back from the top when it exits
			//Lets make it a bit more organic and let flakes enter from the left and right also.
			if(p.x > W+5 || p.x < -5 || p.y > H)
			{
				if(i%3 > 0) //66.67% of the flakes
				{
					particles[i] = {x: Math.random()*W, y: -10, r: p.r, d: p.d};
				}
				else
				{
					//If the flake is exitting from the right
					if(Math.sin(angle) > 0)
					{
						//Enter from the left
						particles[i] = {x: -5, y: Math.random()*H, r: p.r, d: p.d};
					}
					else
					{
						//Enter from the right
						particles[i] = {x: W+5, y: Math.random()*H, r: p.r, d: p.d};
					}
				}
			}
		}
	}
	
	//animation loop
	setInterval(draw, 33);
}
Do you want hide your ip address?Surf anonymously, prevent hackers from acquiring your IP address, send anonymous email, and encrypt your Internet connection. High speed, ultra secure, and easy to use. Instant setup.