Animated solar system

by GOKILAVANI 2014-04-26 09:24:38

JAVASCRIPT CODE FOR ANIMATED SOLAR SYSTEMLaughing

solar_system.png
var sun = new Image();
var moon = new Image();
var earth = new Image();
function init(){
sun.src = 'https://mdn.mozillademos.org/files/1456/Canvas_sun.png';
moon.src = 'https://mdn.mozillademos.org/files/1443/Canvas_moon.png';
earth.src = 'https://mdn.mozillademos.org/files/1429/Canvas_earth.png';
setInterval(draw,100);
}

function draw() {
var ctx = document.getElementById('canvas').getContext('2d');

ctx.globalCompositeOperation = 'destination-over';
ctx.clearRect(0,0,300,300); // clear canvas

ctx.fillStyle = 'rgba(0,0,0,0.4)';
ctx.strokeStyle = 'rgba(0,153,255,0.4)';
ctx.save();
ctx.translate(150,150);

// Earth
var time = new Date();
ctx.rotate( ((2*Math.PI)/60)*time.getSeconds() + ((2*Math.PI)/60000)*time.getMilliseconds() );
ctx.translate(105,0);
ctx.fillRect(0,-12,50,24); // Shadow
ctx.drawImage(earth,-12,-12);

// Moon
ctx.save();
ctx.rotate( ((2*Math.PI)/6)*time.getSeconds() + ((2*Math.PI)/6000)*time.getMilliseconds() );
ctx.translate(0,28.5);
ctx.drawImage(moon,-3.5,-3.5);
ctx.restore();

ctx.restore();

ctx.beginPath();
ctx.arc(150,150,105,0,Math.PI*2,false); // Earth orbit
ctx.stroke();

ctx.drawImage(sun,0,0,300,300);
}
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