Created
August 5, 2012 10:42
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Star Sky (or Snow...)
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| <!DOCTYPE HTML> | |
| <html> | |
| <head> | |
| <style> | |
| body { | |
| margin: 0px; | |
| padding: 0px; | |
| } | |
| canvas { | |
| border: dotted 3px black; | |
| background-color: #00003B; | |
| } | |
| </style> | |
| <script> | |
| window.onload = function() { | |
| var canvas = document.getElementById('canvas'); | |
| var ctx = canvas.getContext('2d'); | |
| canvas.width = 580; | |
| canvas.height = 500; | |
| MAX_STARS = 1000; | |
| var stars = []; | |
| function init() { | |
| for(var i = 0; i < MAX_STARS; i++) { | |
| var star = {}; | |
| star.x = Math.floor(Math.random() * canvas.width); | |
| star.y = Math.floor(Math.random() * canvas.height); | |
| star.size = Math.floor(Math.random() * 5 + 1); | |
| stars.push(star); | |
| } | |
| } | |
| function create_star(ctx, x, y, size) { | |
| ctx.fillStyle = "white"; | |
| ctx.fillRect(x, y, size, size); | |
| } | |
| function draw_loop() { | |
| canvas.width = canvas.width; | |
| for(var i = 0; i < MAX_STARS; i++) { | |
| star = stars[i]; | |
| create_star(ctx, star.x, star.y, star.size); | |
| speed = star.size; | |
| //star.x += speed; | |
| star.y += speed; | |
| star.x += Math.floor(Math.random() * 5 - 1) | |
| if (star.x >= canvas.width) { | |
| star.y = Math.floor(Math.random() * canvas.height); | |
| star.x = 0; | |
| } | |
| if (star.y >= canvas.height) { | |
| star.x = Math.floor(Math.random() * canvas.width); | |
| star.y = 0; | |
| } | |
| } | |
| setTimeout(draw_loop, 33) | |
| } | |
| init(); | |
| draw_loop(ctx); | |
| }; | |
| </script> | |
| </head> | |
| <body> | |
| <canvas id="canvas"> | |
| WOW! Back off! This browser doesn't support canvas | |
| </canvas> | |
| </body> | |
| </html> |
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