朽木白露
朽木白露

web酷炫粒子特效

QQ群招募中：646258285（招募中，没几个人说话），
需要交流的朋友可以直接加我微信( DntBeliv )或QQ( 1121864253 )

web酷炫粒子特效_第1张图片

<!doctype html>
<html lang="en">

<head>
    <meta charset="gbk2312">
    <title>粒子背景</title>
    <link rel="stylesheet" type="text/css" href="style.css" media="all">
    <style>
        html,
        body {
            font-size: 14px;
            font-family: "微软雅黑", Helvetica, Tahoma, Arial, sans-serif;
            color: #000;
            background-color: #30333F;
            margin: 0;
            padding: 0;
        }

        img {
            border: 0;
        }

        .cf:before,
        .cf:after {
            display: table;
            content: "";
        }

        .cf:after {
            clear: both;
        }

        .cf {
            *zoom: 1;
        }

        canvas {
            position: fixed;
            top: 0px;
        }
    </style>
</head>

<body id="login-page">
    <canvas width="1293" height="717"></canvas>
    <script>
        /**
         * Created by Administrator on 2016/6/29.
         */
        var canvas = document.querySelector('canvas'),
            ctx = canvas.getContext('2d')
        canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;

        ctx.lineWidth = .3;
        ctx.strokeStyle = (new Color(150)).style;
        var mousePosition = {
            x: 30 * canvas.width / 100,
            y: 30 * canvas.height / 100
        };
        var dots = {
            nb: 750,
            distance: 50,
            d_radius: 100,
            array: []
        };
        function colorValue(min) {
            return Math.floor(Math.random() * 255 + min);
        }
        function createColorStyle(r, g, b) {
            return 'rgba(' + r + ',' + g + ',' + b + ', 0.8)';
        }
        function mixComponents(comp1, weight1, comp2, weight2) {
            return (comp1 * weight1 + comp2 * weight2) / (weight1 + weight2);
        }
        function averageColorStyles(dot1, dot2) {
            var color1 = dot1.color,
                color2 = dot2.color;

            var r = mixComponents(color1.r, dot1.radius, color2.r, dot2.radius),
                g = mixComponents(color1.g, dot1.radius, color2.g, dot2.radius),
                b = mixComponents(color1.b, dot1.radius, color2.b, dot2.radius);
            return createColorStyle(Math.floor(r), Math.floor(g), Math.floor(b));
        }

        function Color(min) {
            min = min || 0;
            this.r = colorValue(min);
            this.g = colorValue(min);
            this.b = colorValue(min);
            this.style = createColorStyle(this.r, this.g, this.b);
        }

        function Dot() {
            this.x = Math.random() * canvas.width;
            this.y = Math.random() * canvas.height;

            this.vx = -.5 + Math.random();
            this.vy = -.5 + Math.random();

            this.radius = Math.random() * 2;

            this.color = new Color();
        }

        Dot.prototype = {
            draw: function () {
                ctx.beginPath();
                ctx.fillStyle = this.color.style;
                ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);
                ctx.fill();
            }
        };

        function createDots() {
            for (i = 0; i < dots.nb; i++) {
                dots.array.push(new Dot());
            }
        }

        function moveDots() {
            for (i = 0; i < dots.nb; i++) {

                var dot = dots.array[i];

                if (dot.y < 0 || dot.y > canvas.height) {
                    dot.vx = dot.vx;
                    dot.vy = - dot.vy;
                }
                else if (dot.x < 0 || dot.x > canvas.width) {
                    dot.vx = - dot.vx;
                    dot.vy = dot.vy;
                }
                dot.x += dot.vx;
                dot.y += dot.vy;
            }
        }

        function connectDots() {
            for (i = 0; i < dots.nb; i++) {
                for (j = i; j < dots.nb; j++) {
                    i_dot = dots.array[i];
                    j_dot = dots.array[j];

                    if ((i_dot.x - j_dot.x) < dots.distance && (i_dot.y - j_dot.y) < dots.distance && (i_dot.x - j_dot.x) > - dots.distance && (i_dot.y - j_dot.y) > - dots.distance) {
                        if ((i_dot.x - mousePosition.x) < dots.d_radius && (i_dot.y - mousePosition.y) < dots.d_radius && (i_dot.x - mousePosition.x) > - dots.d_radius && (i_dot.y - mousePosition.y) > - dots.d_radius) {
                            ctx.beginPath();
                            ctx.strokeStyle = averageColorStyles(i_dot, j_dot);
                            ctx.moveTo(i_dot.x, i_dot.y);
                            ctx.lineTo(j_dot.x, j_dot.y);
                            ctx.stroke();
                            ctx.closePath();
                        }
                    }
                }
            }
        }

        function drawDots() {
            for (i = 0; i < dots.nb; i++) {
                var dot = dots.array[i];
                dot.draw();
            }
        }

        function animateDots() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            moveDots();
            connectDots();
            drawDots();
            requestAnimationFrame(animateDots);
        }
        document.querySelector('canvas').addEventListener('mousemove', function (e) {
            mousePosition.x = e.pageX;
            mousePosition.y = e.pageY;
        })

        document.querySelector('canvas').addEventListener('mouseleave', function (e) {
            mousePosition.x = canvas.width / 2;
            mousePosition.y = canvas.height / 2;
        })

        createDots();
        requestAnimationFrame(animateDots);

    </script>
</body>

</html>


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