Evanyou Blog 彩带
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博客园美化设计(1)彩带特效

先放图！

局部代码

canvas：

    <style>
    canvas {
        position: fixed;
        top: 0;
        left: 0;
        z-index: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
    }
    </style>

script:

 <canvas width="2560" height="7292"></canvas>
    <script>
    document.addEventListener('touchmove', function(e) {
        e.preventDefault()
    })
    var c = document.getElementsByTagName('canvas')[0],
        x = c.getContext('2d'),
        pr = window.devicePixelRatio || 1,
        w = window.innerWidth,
        h = window.innerHeight,
        f = 90,
        q,
        m = Math,
        r = 0,
        u = m.PI * 2,
        v = m.cos,
        z = m.random
    c.width = w * pr
    c.height = h * pr
    x.scale(pr, pr)
    x.globalAlpha = 0.6
 
    function i() {
        x.clearRect(0, 0, w, h)
        q = [{ x: 0, y: h * .7 + f }, { x: 0, y: h * .7 - f }]
        while (q[1].x < w + f) d(q[0], q[1])
    }
    function d(i, j) {
        x.beginPath()
        x.moveTo(i.x, i.y)
        x.lineTo(j.x, j.y)
        var k = j.x + (z() * 2 - 0.25) * f,
            n = y(j.y)
        x.lineTo(k, n)
        x.closePath()
        r -= u / -50
        x.fillStyle = '#' + (v(r) * 127 + 128 << 16 | v(r + u / 3) * 127 + 128 << 8 | v(r + u / 3 * 2) * 127 + 128).toString(16)
        x.fill()
        q[0] = q[1]
        q[1] = { x: k, y: n }
    }
    function y(p) {
        var t = p + (z() * 2 - 1.1) * f
        return (t > h || t < 0) ? y(p) : t
    }
    document.onclick = i
    document.ontouchstart = i
    i()
    </script>

完整代码

//彩带特效2019

<head>
    <title>Evanyou Blog 彩带</title>
    <style>
    canvas {
        position: fixed;
        top: 0;
        left: 0;
        z-index: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
    }
    </style>
</head>
 
<body>
    <canvas width="2560" height="7292"></canvas>
    <script>
    document.addEventListener('touchmove', function(e) {
        e.preventDefault()
    })
    var c = document.getElementsByTagName('canvas')[0],
        x = c.getContext('2d'),
        pr = window.devicePixelRatio || 1,
        w = window.innerWidth,
        h = window.innerHeight,
        f = 90,
        q,
        m = Math,
        r = 0,
        u = m.PI * 2,
        v = m.cos,
        z = m.random
    c.width = w * pr
    c.height = h * pr
    x.scale(pr, pr)
    x.globalAlpha = 0.6
 
    function i() {
        x.clearRect(0, 0, w, h)
        q = [{ x: 0, y: h * .7 + f }, { x: 0, y: h * .7 - f }]
        while (q[1].x < w + f) d(q[0], q[1])
    }
    function d(i, j) {
        x.beginPath()
        x.moveTo(i.x, i.y)
        x.lineTo(j.x, j.y)
        var k = j.x + (z() * 2 - 0.25) * f,
            n = y(j.y)
        x.lineTo(k, n)
        x.closePath()
        r -= u / -50
        x.fillStyle = '#' + (v(r) * 127 + 128 << 16 | v(r + u / 3) * 127 + 128 << 8 | v(r + u / 3 * 2) * 127 + 128).toString(16)
        x.fill()
        q[0] = q[1]
        q[1] = { x: k, y: n }
    }
    function y(p) {
        var t = p + (z() * 2 - 1.1) * f
        return (t > h || t < 0) ? y(p) : t
    }
    document.onclick = i
    document.ontouchstart = i
    i()
    </script>
</body>
 
</html>
posted @ 2019-08-13 21:03  yi_heng  阅读(528)  评论(0)  编辑  收藏  举报