Created
December 7, 2017 12:14
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Make a Matrix rain using HTML5,JS,CSS
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<html> | |
<head> | |
<title>Matrix Rain</title> | |
<style> | |
* {margin: 0; padding: 0;} | |
body {background: black;} | |
canvas {display: block;} | |
</style> | |
</head> | |
<body> | |
<canvas id="c"></canvas> | |
</body> | |
<script> | |
var c = document.getElementById("c"); | |
var ctx = c.getContext("2d"); | |
//making the canvas full screen | |
c.height = window.innerHeight; | |
c.width = window.innerWidth; | |
//english characters | |
var english = "1001010101110101010101010010101000101011101111010101010110101010101010101110000101"; | |
//converting the string into an array of single characters | |
english = english.split(""); | |
var font_size = 15; | |
var columns = c.width/font_size; //number of columns for the rain | |
//an array of drops - one per column | |
var drops = []; | |
//x below is the x coordinate | |
//1 = y co-ordinate of the drop(same for every drop initially) | |
for(var x = 0; x < columns; x++) | |
drops[x] = 1; | |
//drawing the characters | |
function draw() | |
{ | |
//Black BG for the canvas | |
//translucent BG to show trail | |
ctx.fillStyle = "rgba(0, 0, 0, 0.05)"; | |
ctx.fillRect(0, 0, c.width, c.height); | |
ctx.fillStyle = "#0F0"; //green text | |
ctx.font = font_size + "px arial"; | |
//looping over drops | |
for(var i = 0; i < drops.length; i++) | |
{ | |
//a random chinese character to print | |
var text = english[Math.floor(Math.random()*english.length)]; | |
//x = i*font_size, y = value of drops[i]*font_size | |
ctx.fillText(text, i*font_size, drops[i]*font_size); | |
//sending the drop back to the top randomly after it has crossed the screen | |
//adding a randomness to the reset to make the drops scattered on the Y axis | |
if(drops[i]*font_size > c.height && Math.random() > 0.975) | |
drops[i] = 0; | |
//incrementing Y coordinate | |
drops[i]++; | |
} | |
} | |
setInterval(draw, 33); | |
</script> | |
</html> |
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