canvas绘制爱心

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需求：绘制爱心图像轨迹。

实现：直接贴代码吧！

预览地址：https://codepen.io/wzc570738205/pen/dqqBpj

<!DOCTYPE>

<html>

<head>

    <meta charset="UTF-8">

    <title>模仿笔画</title>

    <style type="text/css">

        #_canvas {

            background-color: rgb(, , );

            border: 1px solid #;

        }

    </style>

</head>

<body>

    <canvas id="_canvas" width="" height=''>sorry, your broswer does not support html5!</canvas>

    <script type="text/javascript">

        var canvas_ = document.getElementById("_canvas");

        var context = canvas_.getContext("2d");

        //线条设置

        context.strokeStyle = "red";

        context.lineWidth = ;

        //线条数组

        var array_paint = [];

        //背景图

        var img = new Image()

        img.src = "https://ws1.sinaimg.cn/large/0065nu1aly1fv5kg78i8kj30xc0m8ank.jpg"

        context.drawImage(img, , );

        function paint() {

            context.beginPath();

            context.moveTo(array_paint[][], array_paint[][]);

            if (array_paint.length == )

                context.lineTo(array_paint[][] + , array_paint[][] + );

            else {

                var i = ;

                for (i in array_paint) {

                    context.lineTo(array_paint[i][], array_paint[i][]);

                    context.moveTo(array_paint[i][], array_paint[i][]);

                }

            }

            context.closePath();

            context.stroke();

        }

        let num = -;

        let timer = null;

        let list = []

        //创建坐标

        list = heartShape(, , )

        function people() {

            num++;

            var imgpeople = new Image()

            imgpeople.src = "https://ws1.sinaimg.cn/large/0065nu1aly1fvcmafdhe6j305k05k3ye.jpg"

            context.drawImage(imgpeople, list[num].current_x *  /  - , list[num].current_y *  /  - , ,

                );

            context.clearRect(, , screen.width, screen.height);

            context.drawImage(img, , );

            console.log(list[num].current_x *  / );

            if (num < list.length - ) {

                let current_x = (Math.random() * ).toFixed();

                let current_y = (Math.random() * ).toFixed();

                array_paint.push([list[num].current_x *  / , list[num].current_y *  / ]);

                paint();

                if (num > ) {

                    context.drawImage(imgpeople, list[num].current_x *  /  - , list[num].current_y *  /  -

                        , , );

                }

            } else {

                array_paint = [];

                for (var i = ; i < list.length; i++) {

                    array_paint.push([list[i].current_x *  / , list[i].current_y *  / ]);

                    paint();

                    context.drawImage(imgpeople, list[num].current_x *  /  - , list[num].current_y *  /  -

                        , , );

                }

                clearInterval(timer);

            }

        }

        timer = setInterval(people, )

        function heartShape(r, dx, dy) { //r:大小;dx:水平偏移;dy:垂直偏移;c:颜色

            var m, n, x, y, i;

            let arr = [];

            for (i = ; i <= 7.9; i += 0.04) {

                m = i;

                n = -r * (((Math.sin(i) * Math.sqrt(Math.abs(Math.cos(i)))) / (Math.sin(i) + 1.4)) -  * Math.sin(i) +

                    );

                x = n * Math.cos(m) + dx;

                y = n * Math.sin(m) + dy;

                arr.push({

                    current_x: x,

                    current_y: y

                })

            }

            return arr

        }

    </script>

</body>

</html>

巴特西

canvas绘制爱心

欢迎加入前端交流群交流知识获取视频资料：

需求：绘制爱心图像轨迹。

实现：直接贴代码吧！

预览地址：https://codepen.io/wzc570738205/pen/dqqBpj

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