爱就大胆说出来，不敢？那就用代码说出来！

最新推荐文章于 2025-05-25 19:06:14 发布
原创最新推荐文章于 2025-05-25 19:06:14 发布 · 426 阅读
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这是一个使用HTML5 Canvas绘制动态心形图案的项目，作者将其作为礼物送给女神。代码中包含了一个心形路径的数学公式，通过调整参数实现脉动效果，并在画布上随机生成跟随心形轨迹移动的粒子。
转载自本人GitHub
https://github.com/intflag/SayLOVE
运行效果

love
项目源码

采用canvas绘制，其中「心形」绘制代码来自网络，本人觉着挺有创意的就拿来改了改，然后送给女神了，哈哈！！！
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
    <TITLE> New Document </TITLE>
    <META NAME="Generator" CONTENT="EditPlus">
    <META NAME="Author" CONTENT="">
    <META NAME="Keywords" CONTENT="">
    <META NAME="Description" CONTENT="">
    <style>
        canvas {
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color = "#2e2e2e";
        }
    </style>
</HEAD>

<BODY style=" background-color: #000;">

<canvas id="heart"></canvas>

<script>
    window.requestAnimationFrame =
            window.__requestAnimationFrame ||
            window.requestAnimationFrame ||
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame ||
            window.oRequestAnimationFrame ||
            window.msRequestAnimationFrame ||
            (function () {
                return function (callback, element) {
                    var lastTime = element.__lastTime;
                    if (lastTime === undefined) {
                        lastTime = 0;
                    }
                    var currTime = Date.now();
                    var timeToCall = Math.max(1, 33 - (currTime - lastTime));
                    window.setTimeout(callback, timeToCall);
                    element.__lastTime = currTime + timeToCall;
                };
            })();
    window.isDevice = (/android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test(((navigator.userAgent || navigator.vendor || window.opera)).toLowerCase()));
    var loaded = false;
    var init = function () {
        if (loaded) return;
        loaded = true;
        var mobile = window.isDevice;
        var koef = mobile ? 0.5 : 1;
        var canvas = document.getElementById('heart');
        var ctx = canvas.getContext('2d');
        var width = canvas.width = koef * innerWidth;
        var height = canvas.height = koef * innerHeight;
        var rand = Math.random;
        ctx.fillStyle = "rgba(0,0,0,1)";
        ctx.fillRect(0, 0, width, height);


        var heartPosition = function (rad) {
            //return [Math.sin(rad), Math.cos(rad)];
            return [Math.pow(Math.sin(rad), 3), -(15 * Math.cos(rad) - 5 * Math.cos(2 * rad) - 2 * Math.cos(3 * rad) - Math.cos(4 * rad))];
        };
        var scaleAndTranslate = function (pos, sx, sy, dx, dy) {
            return [dx + pos[0] * sx, dy + pos[1] * sy];
        };

        window.addEventListener('resize', function () {
            width = canvas.width = koef * innerWidth;
            height = canvas.height = koef * innerHeight;
            ctx.fillStyle = "rgba(0,0,0,1)";
            ctx.fillRect(0, 0, width, height);
        });

        var traceCount = mobile ? 20 : 50;
        var pointsOrigin = [];
        var i;
        var dr = mobile ? 0.3 : 0.1;
        for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 210, 13, 0, 0));
        for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 150, 9, 0, 0));
        for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 90, 5, 0, 0));
        var heartPointsCount = pointsOrigin.length;

        var targetPoints = [];
        var pulse = function (kx, ky) {
            for (i = 0; i < pointsOrigin.length; i++) {
                targetPoints[i] = [];
                targetPoints[i][0] = kx * pointsOrigin[i][0] + width / 2;
                targetPoints[i][1] = ky * pointsOrigin[i][1] + height / 2;
            }
        };

        var e = [];
        for (i = 0; i < heartPointsCount; i++) {
            var x = rand() * width;
            var y = rand() * height;
            e[i] = {
                vx: 0,
                vy: 0,
                R: 2,
                speed: rand() + 5,
                q: ~~(rand() * heartPointsCount),
                D: 2 * (i % 2) - 1,
                force: 0.2 * rand() + 0.7,
                f: "hsla(0," + ~~(40 * rand() + 60) + "%," + ~~(60 * rand() + 20) + "%,.3)",
                trace: []
            };
            for (var k = 0; k < traceCount; k++) e[i].trace[k] = {x: x, y: y};
        }

        var config = {
            traceK: 0.4,
            timeDelta: 0.01
        };

        var time = 0;
        var textLeft1 = 0;
        var textLeft2 = -10;
        var loop = function () {
            //设置字体填充颜色
            ctx.fillStyle = "red";
            //设置字体样式
            ctx.font = "48px 楷体";
            ctx.fillText("I LOVE YOU - 宝贝", 460, 120);

            ctx.font = "26px 楷体";

            //从坐标点(50,50)开始绘制文字
            var mLeft = 50;
            var mTop = 250;

            //左侧文字
            ctx.fillStyle = "red";

            ctx.fillText("我爱你，没有什么目的，只是爱你。", mLeft, mTop);
            ctx.fillText("一辈子，就做一次自己。", mLeft, mTop + 50);
            ctx.fillText("这一次，我想给你全世界；", mLeft, mTop + 100);
            ctx.fillText("这一次，遍体鳞伤也没关系；", mLeft, mTop + 150);
            ctx.fillText("这一次，用尽所有的勇敢；", mLeft, mTop + 200);
            ctx.fillText("这一次，可以什么都不在乎。", mLeft, mTop + 250);
            ctx.fillText("但只是这一次就够了。", mLeft, mTop + 300);
            ctx.fillText("因为生命再也承受不起这么重的爱情。", mLeft, mTop + 350);


            //右侧标签
            ctx.font = "60px 楷体";
            ctx.fillStyle = "#ff00ff";
            ctx.fillText("未来", 1000, 300);
            ctx.font = "45px 楷体";
            ctx.fillStyle = "#ccbe06";
            ctx.fillText("勇敢", 900, 500);
            ctx.font = "50px 楷体";
            ctx.fillStyle = "#00ffff";
            ctx.fillText("真心", 1100, 600);
            ctx.font = "38px 楷体";
            ctx.fillStyle = "#3d85c6";
            ctx.fillText("坚持", 1150, 400);
            ctx.font = "38px 楷体";
            ctx.fillStyle = "#ffffff";
            ctx.fillText("白头", 1200, 200);

            var n = -Math.cos(time);
            pulse((1 + n) * .5, (1 + n) * .5);
            time += ((Math.sin(time)) < 0 ? 9 : (n > 0.8) ? .2 : 1) * config.timeDelta;
            ctx.fillStyle = "rgba(0,0,0,.1)";
            ctx.fillRect(0, 0, width, height);
            for (i = e.length; i--;) {
                var u = e[i];
                var q = targetPoints[u.q];
                var dx = u.trace[0].x - q[0];
                var dy = u.trace[0].y - q[1];
                var length = Math.sqrt(dx * dx + dy * dy);
                if (10 > length) {
                    if (0.95 < rand()) {
                        u.q = ~~(rand() * heartPointsCount);
                    }
                    else {
                        if (0.99 < rand()) {
                            u.D *= -1;
                        }
                        u.q += u.D;
                        u.q %= heartPointsCount;
                        if (0 > u.q) {
                            u.q += heartPointsCount;
                        }
                    }
                }
                u.vx += -dx / length * u.speed;
                u.vy += -dy / length * u.speed;
                u.trace[0].x += u.vx;
                u.trace[0].y += u.vy;
                u.vx *= u.force;
                u.vy *= u.force;
                for (k = 0; k < u.trace.length - 1;) {
                    var T = u.trace[k];
                    var N = u.trace[++k];
                    N.x -= config.traceK * (N.x - T.x);
                    N.y -= config.traceK * (N.y - T.y);
                }
                ctx.fillStyle = u.f;
                for (k = 0; k < u.trace.length; k++) {
                    ctx.fillRect(u.trace[k].x, u.trace[k].y, 1, 1);
                }
            }
            //ctx.fillStyle = "rgba(255,255,255,1)";
            //for (i = u.trace.length; i--;) ctx.fillRect(targetPoints[i][0], targetPoints[i][1], 2, 2);

            window.requestAnimationFrame(loop, canvas);
        };

        loop();
    };

    var s = document.readyState;
    if (s === 'complete' || s === 'loaded' || s === 'interactive') init();
    else document.addEventListener('DOMContentLoaded', init, false);
</script>
</BODY>
</HTML>