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bby

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bby
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lqbby
2022-06-12 16:54:03 +08:00
parent e539f5b8dd
commit 73ae0b3f3b
17 changed files with 10631 additions and 0 deletions
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js/bj.js Normal file
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var canvas;
var stars_count;
var stars;
ini();
makeStars();
var interval=setInterval(function(){drawStars();},50);//<2F><>ʱˢ<CAB1><CBA2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
function ini(){//<2F><>ʼ<EFBFBD><CABC>
canvas = document.getElementById("starfield");
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
context = canvas.getContext("2d");
stars = Array();//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD><C9B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD>x,y,<2C><>С<EFBFBD><D0A1><EFBFBD><EFBFBD>ɫ<EFBFBD><C9AB><EFBFBD>ٶȣ<D9B6>
stars_count = 300;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
clearInterval(interval);
}
function makeStars(){//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
for(var i=0;i<stars_count;i++)
{
let x=Math.random() * canvas.offsetWidth;
let y = Math.random() * canvas.offsetHeight;
let radius = Math.random()*0.8;
let color="rgba("+Math.random()*255+","+Math.random()*255+","+Math.random()*255+",0.8)";
let speed=Math.random()*0.5;
let arr={'x':x,'y':y,'radius':radius,'color':color,'speed':speed};//<2F><>x,y,<2C><>С<EFBFBD><D0A1><EFBFBD><EFBFBD>ɫ<EFBFBD><C9AB><EFBFBD>ٶȣ<D9B6>
stars.push(arr);//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD><C9B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݴ<EFBFBD><DDB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
}
}
function drawStars(){//<2F><><EFBFBD><EFBFBD><EFBFBD>ǻ<EFBFBD><C7BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
context.fillStyle = "#0e1729";
context.fillRect(0,0,canvas.width,canvas.height);
for (var i = 0; i < stars.length; i++) {
var x = stars[i]['x'] - stars[i]['speed'];
if(x<-2*stars[i]['radius']) x=canvas.width;
stars[i]['x']=x;
var y = stars[i]['y'];
var radius = stars[i]['radius'];
context.beginPath();
context.arc(x, y, radius*2, 0, 2*Math.PI);
context.fillStyle = "rgba("+Math.random()*255+","+Math.random()*255+","+Math.random()*255+",0.8)";
context.fill();
}
}
window.onresize = function(){//<2F><><EFBFBD>ڴ<EFBFBD>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD>仯ʱ<E4BBAF><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
ini();
makeStars();
interval=setInterval(function(){drawStars();},50);
}