svg实现动态红色立体菱形背景效果代码-html代码-BFW代码库

svg实现动态红色立体菱形背景效果代码

代码语言：html

所属分类：背景

代码描述：svg实现动态红色立体菱形背景效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<html>
<head>
<meta charset="utf-8">
<style type="text/css">
html {
	background: radial-gradient(ellipse at center, #ef0e39 0%, black 100%);
	overflow: hidden;
}
</style>
</head>

<body>

<div id="bg"></div>

<script type="text/javascript">
var refreshDuration = 10000;
var refreshTimeout;
var numPointsX;
var numPointsY;
var unitWidth;
var unitHeight;
var points;

function onLoad()
{
    var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
    svg.setAttribute('width',window.innerWidth);
    svg.setAttribute('height',window.innerHeight);
    document.querySelector('#bg').appendChild(svg);

    var unitSize = (window.innerWidth+window.innerHeight)/20;
    numPointsX = Math.ceil(window.innerWidth/unitSize)+1;
    numPointsY = Math.ceil(window.innerHeight/unitSize)+1;
    unitWidth = Math.ceil(window.innerWidth/(numPointsX-1));
    unitHeight = Math.ceil(window.innerHeight/(numPointsY-1));

    points = [];

    for(var y = 0; y < numPointsY; y++) {
        for(var x = 0; x < numPointsX; x++) {
            points.push({x:unitWidth*x, y:unitHeight*y, originX:unitWidth*x, originY:unitHeight*y});
        }
    }

    randomize();

    for(var i = 0; i < points.length; i++) {
        if(points[i].originX != unitWidth*(numPointsX-1) && points[i].originY != unitHeight*(numPointsY-1)) {
            var topLeftX = points[i].x;
            var topLeftY = points[i].y;
            var topRightX = points[i+1].x;
            var topRightY = points[i+1].y;
            var bottomLeftX = points[i+numPointsX].x;
            var bottomLeftY = points[i+numPointsX].y;
            var bottomRightX = points[i+numPointsX+1].x;
            var bottomRightY = points[i+numPointsX+1].y;

            var rando = Math.floor(Math.random()*2);

            for(var n = 0; n < 2; n++) {
                var polygon = document.createElementNS(svg.namespaceURI, 'polygon');

                if(rando==0) {
                    if(n==0) {
                        polygon.point1 = i;
                        polygon.point2 = i+numPointsX;
                        polygon.point3 = i+numPointsX+1;
                        polygon.setAttribute('points',topLeftX+','+topLeftY+' '+bottomLeftX+','+bottomLeftY+' '+bottomRightX+','+bottomRightY);
                    } else if(n==1) {
                        polygon.point1 = i;
                        polygon.point2 = i+1;
                        polygon.point3 = i+numPointsX+1;
                        polygon.setAttribute('points',topLeftX+','+topLeftY+' '+topRightX+','+topRightY+' '+bottomRightX+','+bottomRightY);
                    }
                } else if(rando==1) {
                 .........完整代码请登录后点击上方下载按钮下载查看