js仿黑客帝国文字数字雨效果
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>黑客帝国文字下落</title> <style> html, body {margin:0; padding:0; background-color:#000;} </style> <script src="http://apps.bdimg.com/libs/jquery/1.9.0/jquery.min.js"></script> </head> <body> <canvas id="matrix" height="943" width="1920"></canvas> <script type="text/javascript"> //文字 var txts = "0123456789!@#$%^&*()~_+℃○※"; //转为数组 txts = txts.split(""); var matrix=document.getElementById("matrix"); var context=matrix.getContext("2d"); matrix.height=window.innerHeight; matrix.width=window.innerWidth; var drop=[]; var font_size=16; var columns=matrix.width/font_size; for(var i=0;i<columns;i++) drop[i]=1; function drawMatrix(){ context.fillStyle="rgba(0, 0, 0, 0.09)"; context.fillRect(0,0,matrix.width,matrix.height); context.fillStyle="green"; context.font=font_size+"px"; for(var i=0;i<columns;i++){ //随机取要输出的文字 var text = txts[Math.floor(Math.random()*txts.length)]; //输出文字，注意坐标的计算 context.fillText(text,i*font_size,drop[i]*font_size);/*get 0 and 1*/ if(drop[i]*font_size>(matrix.height*2/3)&&Math.random()>0.95)/*reset*/ drop[i]=0; drop[i]++; } } setInterval(drawMatrix,33); </script> </body> </html>
