第一种效果图：
代码部分
代码如下仅供参考，可以直接拿去复制粘贴！
import random from math import sin, cos, pi, log from tkinter import * CANVAS_WIDTH = 640 CANVAS_HEIGHT = 480 CANVAS_CENTER_X = CANVAS_WIDTH / 2 CANVAS_CENTER_Y = CANVAS_HEIGHT / 2 IMAGE_ENLARGE = 11 HEART_COLOR = "#FF99CC" def heart_function(t, shrink_ratio: float = IMAGE_ENLARGE): x = 16 * (sin(t) ** 3) y = -(13 * cos(t) - 5 * cos(2 * t) - 2 * cos(3 * t) - cos(4 * t)) # 放大 x *= shrink_ratio y *= shrink_ratio # 移到画布中央 x += CANVAS_CENTER_X y += CANVAS_CENTER_Y return int(x), int(y) def scatter_inside(x, y, beta=0.15): ratio_x = - beta * log(random.random()) ratio_y = - beta * log(random.random()) dx = ratio_x * (x - CANVAS_CENTER_X) dy = ratio_y * (y - CANVAS_CENTER_Y) return x - dx, y - dy def shrink(x, y, ratio): force = -1 / (((x - CANVAS_CENTER_X) ** 2 + (y - CANVAS_CENTER_Y) ** 2) ** 0.6) dx = ratio * force * (x - CANVAS_CENTER_X) dy = ratio * force * (y - CANVAS_CENTER_Y) return x - dx, y - dy def curve(p): return 2 * (2 * sin(4 * p)) / (2 * pi) class Heart: def __init__(self, generate_frame=20): self._points = set() # 原始爱心坐标集合 self._edge_diffusion_points = set() # 边缘扩散效果点坐标集合 self._center_diffusion_points = set() # 中心扩散效果点坐标集合 self.all_points = {} # 每帧动态点坐标 self.build(2000) self.random_halo = 1000 self.generate_frame = generate_frame for frame in range(generate_frame): self.calc(frame) def build(self, number): for _ in range(number): t = random.uniform(0, 2 * pi) x, y = heart_function(t) self._points.add((x, y)) # 爱心内扩散 for _x, _y in list(self._points): for _ in range(3): x, y = scatter_inside(_x, _y, 0.05) self._edge_diffusion_points.add((x, y)) # 爱心内再次扩散 point_list = list(self._points) for _ in range(4000): x, y = random.choice(point_list) x, y = scatter_inside(x, y, 0.17) self._center_diffusion_points.add((x, y)) @staticmethod def calc_position(x, y, ratio): force = 1 / (((x - CANVAS_CENTER_X) ** 2 + (y - CANVAS_CENTER_Y) ** 2) ** 0.520) dx = ratio * force * (x - CANVAS_CENTER_X) + random.randint(-1, 1) dy = ratio * force * (y - CANVAS_CENTER_Y) + random.randint(-1, 1) return x - dx, y - dy def calc(self, generate_frame): ratio = 10 * curve(generate_frame / 10 * pi) halo_radius = int(4 + 6 * (1 + curve(generate_frame / 10 * pi))) halo_number = int(3000 + 4000 * abs(curve(generate_frame / 10 * pi) ** 2)) all_points = [] # 光环 heart_halo_point = set() for _ in range(halo_number): t = random.uniform(0, 2 * pi) x, y = heart_function(t, shrink_ratio=11.6) x, y = shrink(x, y, halo_radius) if (x, y) not in heart_halo_point: heart_halo_point.add((x, y)) x += random.randint(-14, 14) y += random.randint(-14, 14) size = random.choice((1, 2, 2)) all_points.append((x, y, size)) # 轮廓 for x, y in self._points: x, y = self.calc_position(x, y, ratio) size = random.randint(1, 3) all_points.append((x, y, size)) # 内容 for x, y in self._edge_diffusion_points: x, y = self.calc_position(x, y, ratio) size = random.randint(1, 2) all_points.append((x, y, size)) for x, y in self._center_diffusion_points: x, y = self.calc_position(x, y, ratio) size = random.randint(1, 2) all_points.append((x, y, size)) self.all_points[generate_frame] = all_points def render(self, render_canvas, render_frame): for x, y, size in self.all_points[render_frame % self.generate_frame]: render_canvas.create_rectangle(x, y, x + size, y + size, width=0, fill=HEART_COLOR) def draw(main: Tk, render_canvas: Canvas, render_heart: Heart, render_frame=0): render_canvas.delete('all') render_heart.render(render_canvas, render_frame) main.after(160, draw, main, render_canvas, render_heart, render_frame + 1) if __name__ == '__main__': root = Tk() canvas = Canvas(root, bg='black', height=CANVAS_HEIGHT, width=CANVAS_WIDTH) canvas.pack() heart = Heart() draw(root, canvas, heart) root.title("公众号：木易巷") root.mainloop()
第二种效果图：
代码部分
代码如下仅供参考，可以直接拿去复制粘贴！
<!DOCTYPE HTML> <!-- saved from url=(0051)https://httishere.gitee.io/notion/v4/love-name.html --> <!DOCTYPE html PUBLIC "" ""><HTML><HEAD><META content="IE=11.0000" http-equiv="X-UA-Compatible"> <META charset="utf-8"> <TITLE>木易巷</TITLE> <STYLE type="text/css"> body { margin: 0; overflow: hidden; background: #000; } canvas { position: absolute; width: 100%; height: 100%; } #pinkboard { animation: anim 1.5s ease-in-out infinite; -webkit-animation: anim 1.5s ease-in-out infinite; -o-animation: anim 1.5s ease-in-out infinite; -moz-animation: anim 1.5s ease-in-out infinite; } @keyframes anim { 0% { transform: scale(0.8); } 25% { transform: scale(0.7); } 50% { transform: scale(1); } 75% { transform: scale(0.7); } 100% { transform: scale(0.8); } } @-webkit-keyframes anim { 0% { -webkit-transform: scale(0.8); } 25% { -webkit-transform: scale(0.7); } 50% { -webkit-transform: scale(1); } 75% { -webkit-transform: scale(0.7); } 100% { -webkit-transform: scale(0.8); } } @-o-keyframes anim { 0% { -o-transform: scale(0.8); } 25% { -o-transform: scale(0.7); } 50% { -o-transform: scale(1); } 75% { -o-transform: scale(0.7); } 100% { -o-transform: scale(0.8); } } @-moz-keyframes anim { 0% { -moz-transform: scale(0.8); } 25% { -moz-transform: scale(0.7); } 50% { -moz-transform: scale(1); } 75% { -moz-transform: scale(0.7); } 100% { -moz-transform: scale(0.8); } } #name { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); margin-top: -20px; font-size: 46px; color: #ea80b0; } </STYLE> <META name="GENERATOR" content="MSHTML 11.00.10570.1001"></HEAD> <BODY><CANVAS id="pinkboard"></CANVAS> <!-- <div id="name">木易巷 ❤️</div> --> <CANVAS id="canvas"></CANVAS> <SCRIPT type="text/javascript"> const colors = [ "#eec996", "#8fb7d3", "#b7d4c6", "#c3bedd", "#f1d5e4", "#cae1d3", "#f3c89d", "#d0b0c3", "#819d53", "#c99294", "#cec884", "#ff8e70", "#e0a111", "#fffdf6", "#cbd7ac", "#e8c6c0", "#dc9898", "#ecc8ba", ]; //用来设置的颜色 var canvas = document.getElementById("canvas"); var ctx = canvas.getContext("2d"); let count = 1; var ww = window.innerWidth; var wh = window.innerHeight; var hearts = []; function init() { requestAnimationFrame(render); canvas.width = ww; canvas.height = wh; for (var i = 0; i < 100; i++) { hearts.push(new Heart()); } } function Heart() { this.x = Math.random() * ww; this.y = Math.random() * wh; this.opacity = Math.random() * 0.5 + 0.5; this.vel = { x: (Math.random() - 0.5) * 4, y: (Math.random() - 0.5) * 4, }; this.targetScale = Math.random() * 0.15 + 0.02; this.scale = this.targetScale * Math.random(); } Heart.prototype.update = function (i) { this.x += this.vel.x; this.y += this.vel.y; this.scale += (this.targetScale - this.scale) * 0.01; if (this.x - this.width > ww || this.x + this.width < 0) { this.scale = 0; this.x = Math.random() * ww; } if (this.y - this.height > wh || this.y + this.height < 0) { this.scale = 0; this.y = Math.random() * wh; } this.width = 473.8; this.height = 408.6; }; Heart.prototype.draw = function (i) { ctx.globalAlpha = this.opacity; ctx.font = `${180 * this.scale}px "微软雅黑"`; // ctx.font="20px"; ctx.fillStyle = colors[i % 18]; ctx.fillText( "木易巷", this.x - this.width * 0.5, this.y - this.height * 0.5, this.width, this.height ); // ctx.drawImage( // heartImage, // this.x - this.width * 0.5, // this.y - this.height * 0.5, // this.width, // this.height // ); }; function render() { ctx.clearRect(0, 0, ww, wh); // ctx.globalAlpha = 1; // ctx.fillStyle = "rgba(255,255,255,0.3)"; // ctx.fillRect(0, 0, ww, wh); for (var i = 0; i < 100; i++) { hearts[i].update(i); hearts[i].draw(i); } requestAnimationFrame(render); } init(); // var heartImage = new Image(); // heartImage.onload = init(); // heartImage.src = // "data:image/svg+xml;base64,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"; window.addEventListener("resize", function () { ww = window.innerWidth; wh = window.innerHeight; }); </SCRIPT> <SCRIPT> /* * Settings */ var settings = { particles: { length: 500, // maximum amount of particles duration: 2, // particle duration in sec velocity: 100, // particle velocity in pixels/sec effect: -0.75, // play with this for a nice effect size: 30, // particle size in pixels }, }; /* * RequestAnimationFrame polyfill by Erik M?ller */ (function () { var b = 0; var c = ["ms", "moz", "webkit", "o"]; for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) { window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"]; window.cancelAnimationFrame = window[c[a] + "CancelAnimationFrame"] || window[c[a] + "CancelRequestAnimationFrame"]; } if (!window.requestAnimationFrame) { window.requestAnimationFrame = function (h, e) { var d = new Date().getTime(); var f = Math.max(0, 16 - (d - b)); var g = window.setTimeout(function () { h(d + f); }, f); b = d + f; return g; }; } if (!window.cancelAnimationFrame) { window.cancelAnimationFrame = function (d) { clearTimeout(d); }; } })(); /* * Point class */ var Point = (function () { function Point(x, y) { this.x = typeof x !== "undefined" ? x : 0; this.y = typeof y !== "undefined" ? y : 0; } Point.prototype.clone = function () { return new Point(this.x, this.y); }; Point.prototype.length = function (length) { if (typeof length == "undefined") return Math.sqrt(this.x * this.x + this.y * this.y); this.normalize(); this.x *= length; this.y *= length; return this; }; Point.prototype.normalize = function () { var length = this.length(); this.x /= length; this.y /= length; return this; }; return Point; })(); /* * Particle class */ var Particle = (function () { function Particle() { this.position = new Point(); this.velocity = new Point(); this.acceleration = new Point(); this.age = 0; } Particle.prototype.initialize = function (x, y, dx, dy) { this.position.x = x; this.position.y = y; this.velocity.x = dx; this.velocity.y = dy; this.acceleration.x = dx * settings.particles.effect; this.acceleration.y = dy * settings.particles.effect; this.age = 0; }; Particle.prototype.update = function (deltaTime) { this.position.x += this.velocity.x * deltaTime; this.position.y += this.velocity.y * deltaTime; this.velocity.x += this.acceleration.x * deltaTime; this.velocity.y += this.acceleration.y * deltaTime; this.age += deltaTime; }; Particle.prototype.draw = function (context, image) { function ease(t) { return --t * t * t + 1; } var size = image.width * ease(this.age / settings.particles.duration); context.globalAlpha = 1 - this.age / settings.particles.duration; context.drawImage( image, this.position.x - size / 2, this.position.y - size / 2, size, size ); }; return Particle; })(); /* * ParticlePool class */ var ParticlePool = (function () { var particles, firstActive = 0, firstFree = 0, duration = settings.particles.duration; function ParticlePool(length) { // create and populate particle pool particles = new Array(length); for (var i = 0; i < particles.length; i++) particles[i] = new Particle(); } ParticlePool.prototype.add = function (x, y, dx, dy) { particles[firstFree].initialize(x, y, dx, dy); // handle circular queue firstFree++; if (firstFree == particles.length) firstFree = 0; if (firstActive == firstFree) firstActive++; if (firstActive == particles.length) firstActive = 0; }; ParticlePool.prototype.update = function (deltaTime) { var i; // update active particles if (firstActive < firstFree) { for (i = firstActive; i < firstFree; i++) particles[i].update(deltaTime); } if (firstFree < firstActive) { for (i = firstActive; i < particles.length; i++) particles[i].update(deltaTime); for (i = 0; i < firstFree; i++) particles[i].update(deltaTime); } // remove inactive particles while ( particles[firstActive].age >= duration && firstActive != firstFree ) { firstActive++; if (firstActive == particles.length) firstActive = 0; } }; ParticlePool.prototype.draw = function (context, image) { // draw active particles if (firstActive < firstFree) { for (i = firstActive; i < firstFree; i++) particles[i].draw(context, image); } if (firstFree < firstActive) { for (i = firstActive; i < particles.length; i++) particles[i].draw(context, image); for (i = 0; i < firstFree; i++) particles[i].draw(context, image); } }; return ParticlePool; })(); /* * Putting it all together */ (function (canvas) { var context = canvas.getContext("2d"), particles = new ParticlePool(settings.particles.length), particleRate = settings.particles.length / settings.particles.duration, // particles/sec time; // get point on heart with -PI <= t <= PI function pointOnHeart(t) { return new Point( 160 * Math.pow(Math.sin(t), 3), 130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25 ); } // creating the particle image using a dummy canvas var image = (function () { var canvas = document.createElement("canvas"), context = canvas.getContext("2d"); canvas.width = settings.particles.size; canvas.height = settings.particles.size; // helper function to create the path function to(t) { var point = pointOnHeart(t); point.x = settings.particles.size / 2 + (point.x * settings.particles.size) / 350; point.y = settings.particles.size / 2 - (point.y * settings.particles.size) / 350; return point; } // create the path context.beginPath(); var t = -Math.PI; var point = to(t); context.moveTo(point.x, point.y); while (t < Math.PI) { t += 0.01; // baby steps! point = to(t); context.lineTo(point.x, point.y); } context.closePath(); // create the fill context.fillStyle = "#B22222"; context.fill(); // create the image var image = new Image(); image.src = canvas.toDataURL(); return image; })(); // render that thing! function render() { // next animation frame requestAnimationFrame(render); // update time var newTime = new Date().getTime() / 1000, deltaTime = newTime - (time || newTime); time = newTime; // clear canvas context.clearRect(0, 0, canvas.width, canvas.height); // create new particles var amount = particleRate * deltaTime; for (var i = 0; i < amount; i++) { var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random()); var dir = pos.clone().length(settings.particles.velocity); particles.add( canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y ); } // update and draw particles particles.update(deltaTime); particles.draw(context, image); } // handle (re-)sizing of the canvas function onResize() { canvas.width = canvas.clientWidth; canvas.height = canvas.clientHeight; } window.onresize = onResize; // delay rendering bootstrap setTimeout(function () { onResize(); render(); }, 10); })(document.getElementById("pinkboard")); </SCRIPT> </BODY></HTML>
第三种效果图： 
代码部分
代码如下仅供参考，可以直接拿去复制粘贴！
<!DOCTYPE HTML> <!DOCTYPE html PUBLIC "" ""> <HTML> <HEAD> <META content="IE=11.0000" http-equiv="X-UA-Compatible"> <META charset="utf-8"> <TITLE>木易巷</TITLE> <STYLE type="text/css"> body { margin: 0; overflow: hidden; background: #000; } canvas { position: absolute; width: 100%; height: 100%; } #pinkboard { animation: anim 1.5s ease-in-out infinite; -webkit-animation: anim 1.5s ease-in-out infinite; -o-animation: anim 1.5s ease-in-out infinite; -moz-animation: anim 1.5s ease-in-out infinite; } @keyframes anim { 0% { transform: scale(0.8); } 25% { transform: scale(0.7); } 50% { transform: scale(1); } 75% { transform: scale(0.7); } 100% { transform: scale(0.8); } } @-webkit-keyframes anim { 0% { -webkit-transform: scale(0.8); } 25% { -webkit-transform: scale(0.7); } 50% { -webkit-transform: scale(1); } 75% { -webkit-transform: scale(0.7); } 100% { -webkit-transform: scale(0.8); } } @-o-keyframes anim { 0% { -o-transform: scale(0.8); } 25% { -o-transform: scale(0.7); } 50% { -o-transform: scale(1); } 75% { -o-transform: scale(0.7); } 100% { -o-transform: scale(0.8); } } @-moz-keyframes anim { 0% { -moz-transform: scale(0.8); } 25% { -moz-transform: scale(0.7); } 50% { -moz-transform: scale(1); } 75% { -moz-transform: scale(0.7); } 100% { -moz-transform: scale(0.8); } } #name { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); margin-top: -20px; font-size: 46px; color: #ea80b0; } </STYLE> <META name="GENERATOR" content="MSHTML 11.00.10570.1001"> </HEAD> <BODY> <!--这个是红心--> <CANVAS id="pinkboard"></CANVAS> <!--这个是字体--> <!--<CANVAS id="canvas"></CANVAS>--> <SCRIPT> const colors = [ "#eec996", "#8fb7d3", "#b7d4c6", "#c3bedd", "#f1d5e4", "#cae1d3", "#f3c89d", "#d0b0c3", "#819d53", "#c99294", "#cec884", "#ff8e70", "#e0a111", "#fffdf6", "#cbd7ac", "#e8c6c0", "#dc9898", "#ecc8ba", ]; //用来设置的颜色 var canvas = document.getElementById("canvas"); var ctx = canvas.getContext("2d"); let count = 1; var ww = window.innerWidth; var wh = window.innerHeight; var hearts = []; function init() { requestAnimationFrame(render); canvas.width = ww; canvas.height = wh; for (var i = 0; i < 100; i++) { hearts.push(new Heart()); } } function Heart() { this.x = Math.random() * ww; this.y = Math.random() * wh; this.opacity = Math.random() * 0.5 + 0.5; this.vel = { x: (Math.random() - 0.5) * 4, y: (Math.random() - 0.5) * 4, }; this.targetScale = Math.random() * 0.15 + 0.02; this.scale = this.targetScale * Math.random(); } Heart.prototype.update = function (i) { this.x += this.vel.x; this.y += this.vel.y; this.scale += (this.targetScale - this.scale) * 0.01; if (this.x - this.width > ww || this.x + this.width < 0) { this.scale = 0; this.x = Math.random() * ww; } if (this.y - this.height > wh || this.y + this.height < 0) { this.scale = 0; this.y = Math.random() * wh; } this.width = 473.8; this.height = 408.6; }; Heart.prototype.draw = function (i) { ctx.globalAlpha = this.opacity; ctx.font = `${180 * this.scale}px "微软雅黑"`; // ctx.font="20px"; ctx.fillStyle = colors[i % 18]; ctx.fillText( "木易巷", this.x - this.width * 0.5, this.y - this.height * 0.5, this.width, this.height ); // ctx.drawImage( // heartImage, // this.x - this.width * 0.5, // this.y - this.height * 0.5, // this.width, // this.height // ); }; function render() { ctx.clearRect(0, 0, ww, wh); // ctx.globalAlpha = 1; // ctx.fillStyle = "rgba(255,255,255,0.3)"; // ctx.fillRect(0, 0, ww, wh); for (var i = 0; i < 100; i++) { hearts[i].update(i); hearts[i].draw(i); } requestAnimationFrame(render); } init(); // var heartImage = new Image(); // heartImage.onload = init(); // heartImage.src = // "data:image/svg+xml;base64,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"; window.addEventListener("resize", function () { ww = window.innerWidth; wh = window.innerHeight; }); </SCRIPT> <SCRIPT> /* * Settings */ var settings = { particles: { length: 500, // maximum amount of particles-最大颗粒量 duration: 2, // particle duration in sec-粒子持续时间(秒) velocity: 100, // particle velocity in pixels/sec-粒子速度(像素/秒) effect: -0.75, // play with this for a nice effect-玩这个会有很好的效果 size: 30, // particle size in pixels-颗粒尺寸(像素) }, }; /* * RequestAnimationFrame polyfill * 请求动画帧多边形填充，立即执行函数，当解析到这一行，代码立即执行，后面的括号可以传递参数 */ (function () { var b = 0; var c = ["ms", "moz", "webkit", "o"]; for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) { window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"]; window.cancelAnimationFrame = window[c[a] + "CancelAnimationFrame"] || window[c[a] + "CancelRequestAnimationFrame"]; } if (!window.requestAnimationFrame) { window.requestAnimationFrame = function (h, e) { var d = new Date().getTime(); var f = Math.max(0, 16 - (d - b)); var g = window.setTimeout(function () { h(d + f); }, f); b = d + f; return g; }; } if (!window.cancelAnimationFrame) { window.cancelAnimationFrame = function (d) { clearTimeout(d); }; } })(); /* * Point class * 像素点的类，prototype可以给类中添加方法 */ var Point = (function () { function Point(x, y) { this.x = typeof x !== "undefined" ? x : 0; this.y = typeof y !== "undefined" ? y : 0; } Point.prototype.clone = function () { return new Point(this.x, this.y); }; Point.prototype.length = function (length) { if (typeof length == "undefined") return Math.sqrt(this.x * this.x + this.y * this.y); this.normalize(); this.x *= length; this.y *= length; return this; }; Point.prototype.normalize = function () { var length = this.length(); this.x /= length; this.y /= length; return this; }; return Point; })(); /* * Particle class *粒子类 */ var Particle = (function () { function Particle() { this.position = new Point(); this.velocity = new Point(); this.acceleration = new Point(); this.age = 0; } Particle.prototype.initialize = function (x, y, dx, dy) { this.position.x = x; this.position.y = y; this.velocity.x = dx; this.velocity.y = dy; this.acceleration.x = dx * settings.particles.effect; this.acceleration.y = dy * settings.particles.effect; this.age = 0; }; Particle.prototype.update = function (deltaTime) { this.position.x += this.velocity.x * deltaTime; this.position.y += this.velocity.y * deltaTime; this.velocity.x += this.acceleration.x * deltaTime; this.velocity.y += this.acceleration.y * deltaTime; this.age += deltaTime; }; Particle.prototype.draw = function (context, image) { function ease(t) { return --t * t * t + 1; } var size = image.width * ease(this.age / settings.particles.duration); context.globalAlpha = 1 - this.age / settings.particles.duration; context.drawImage( image, this.position.x - size / 2, this.position.y - size / 2, size, size ); }; return Particle; })(); /* * ParticlePool class * 粒子池类 */ var ParticlePool = (function () { var particles, firstActive = 0, firstFree = 0, duration = settings.particles.duration; function ParticlePool(length) { // create and populate particle pool particles = new Array(length); for (var i = 0; i < particles.length; i++) particles[i] = new Particle(); } ParticlePool.prototype.add = function (x, y, dx, dy) { particles[firstFree].initialize(x, y, dx, dy); // handle circular queue firstFree++; if (firstFree == particles.length) firstFree = 0; if (firstActive == firstFree) firstActive++; if (firstActive == particles.length) firstActive = 0; }; ParticlePool.prototype.update = function (deltaTime) { var i; // update active particles if (firstActive < firstFree) { for (i = firstActive; i < firstFree; i++) particles[i].update(deltaTime); } if (firstFree < firstActive) { for (i = firstActive; i < particles.length; i++) particles[i].update(deltaTime); for (i = 0; i < firstFree; i++) particles[i].update(deltaTime); } // remove inactive particles while ( particles[firstActive].age >= duration && firstActive != firstFree ) { firstActive++; if (firstActive == particles.length) firstActive = 0; } }; ParticlePool.prototype.draw = function (context, image) { // draw active particles //绘制活性粒子 if (firstActive < firstFree) { for (i = firstActive; i < firstFree; i++) particles[i].draw(context, image); } if (firstFree < firstActive) { for (i = firstActive; i < particles.length; i++) particles[i].draw(context, image); for (i = 0; i < firstFree; i++) particles[i].draw(context, image); } }; return ParticlePool; })(); /* * Putting it all together * 把它们放在一起，立即执行 * 执行行为： * 1、渲染一个 */ (function (canvas) { //下面的canvas对象获取，由立即执行函数的参数传递了，不需要get获取 // var canvas = document.getElementById("pinkboard") //获取上下文容器、new粒子池对象、定义变量粒子比率变量并赋值、定义事件变量 var context = canvas.getContext("2d"), particles = new ParticlePool(settings.particles.length), particleRate = settings.particles.length / settings.particles.duration, // particles/sec time; // get point on heart with -PI <= t <= PI //定义得到像素点对象的方法，在下面虚拟画布中调用了该方法 function pointOnHeart(t) { return new Point( 160 * Math.pow(Math.sin(t), 3), 130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25 ); } function gradientColor(startColor, endColor, step) { startRGB = colorRgb(startColor);//转换为rgb数组模式 startR = startRGB[0]; startG = startRGB[1]; startB = startRGB[2]; endRGB = colorRgb(endColor); endR = endRGB[0]; endG = endRGB[1]; endB = endRGB[2]; sR = (endR - startR) / step;//总差值 sG = (endG - startG) / step; sB = (endB - startB) / step; var colorArr = []; for (var i = 0; i < step; i++) { //计算每一步的hex值 var hex = colorHex('rgb(' + parseInt((sR * i + startR)) + ',' + parseInt((sG * i + startG)) + ',' + parseInt((sB * i + startB)) + ')'); colorArr.push(hex); } return colorArr; } var colorRgb = function (sColor) { var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/; var sColor = sColor.toLowerCase(); if (sColor && reg.test(sColor)) { if (sColor.length === 4) { var sColorNew = "#"; for (var i = 1; i < 4; i += 1) { sColorNew += sColor.slice(i, i + 1).concat(sColor.slice(i, i + 1)); } sColor = sColorNew; } //处理六位的颜色值 var sColorChange = []; for (var i = 1; i < 7; i += 2) { sColorChange.push(parseInt("0x" + sColor.slice(i, i + 2))); } return sColorChange; } else { return sColor; } } // 将rgb表示方式转换为hex表示方式 var colorHex = function (rgb) { var _this = rgb; var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/; if (/^(rgb|RGB)/.test(_this)) { var aColor = _this.replace('rgb', "").replace('(', "").replace(')', "").split(","); var strHex = "#"; for (var i = 0; i < aColor.length; i++) { var hex = Number(aColor[i]).toString(16); hex = hex < 10 ? 0 + '' + hex : hex;// 保证每个rgb的值为2位 if (hex === "0") { hex += hex; } strHex += hex; } if (strHex.length !== 7) { strHex = _this; } return strHex; } else if (reg.test(_this)) { var aNum = _this.replace(/#/, "").split(""); if (aNum.length === 6) { return _this; } else if (aNum.length === 3) { var numHex = "#"; for (var i = 0; i < aNum.length; i += 1) { numHex += (aNum[i] + aNum[i]); } return numHex; } } else { return _this; } } var weight = 20; var colorArrAsc = gradientColor('#FF0000', '#0000FF', weight); var colorArrDesc = gradientColor('#0000FF', '#FF0000', weight); // alert(weight + ',' + colorArrAsc.length + ',' + colorArrDesc.length); //用来设置的颜色\ // creating the particle image using a dummy canvas //使用虚拟画布创建粒子图像，返回了图像的像素点 function getImageAsc(i) { var canvas = document.createElement("canvas"); var context = canvas.getContext("2d"); canvas.width = settings.particles.size; canvas.height = settings.particles.size; // helper function to create the path // Helper函数来创建路径 function to(t) { var point = pointOnHeart(t); point.x = settings.particles.size / 2 + (point.x * settings.particles.size) / 350; point.y = settings.particles.size / 2 - (point.y * settings.particles.size) / 350; return point; } // create the path //创建路径 context.beginPath(); var t = -Math.PI; var point = to(t); context.moveTo(point.x, point.y); while (t < Math.PI) { t += 0.01; // baby steps! point = to(t); context.lineTo(point.x, point.y); } context.closePath(); // create the fill //创建填充 context.fillStyle = colorArrAsc[i % (weight+1)]; // alert('asc,'+(i % weight)); context.fill(); // create the image var image = new Image(); image.src = canvas.toDataURL(); return image; }; function getImageDesc(i) { var canvas = document.createElement("canvas"); var context = canvas.getContext("2d"); canvas.width = settings.particles.size; canvas.height = settings.particles.size; // helper function to create the path // Helper函数来创建路径 function to(t) { var point = pointOnHeart(t); point.x = settings.particles.size / 2 + (point.x * settings.particles.size) / 350; point.y = settings.particles.size / 2 - (point.y * settings.particles.size) / 350; return point; } // create the path //创建路径 context.beginPath(); var t = -Math.PI; var point = to(t); context.moveTo(point.x, point.y); while (t < Math.PI) { t += 0.01; // baby steps! point = to(t); context.lineTo(point.x, point.y); } context.closePath(); // create the fill //创建填充 context.fillStyle = colorArrDesc[i % (weight+1)]; // alert('desc,'+(i % (weight+1)); context.fill(); // create the image var image = new Image(); image.src = canvas.toDataURL(); return image; }; var image1 = getImageAsc(0); // render that thing! //定义了一个渲染的方法，使用渲染器，渲染这些点 function render() { // next animation frame //下一个动画帧 requestAnimationFrame(render); // update time //更新时间， var newTime = new Date().getTime() / 1000, deltaTime = newTime - (time || newTime); time = newTime; // alert(newTime); // clear canvas //在给定矩形内清空一个矩形： context.clearRect(0, 0, canvas.width, canvas.height); // create new particles // 创建新粒子 var amount = particleRate * deltaTime; for (var i = 0; i < amount; i++) { var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random()); var dir = pos.clone().length(settings.particles.velocity); particles.add( canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y ); } // update and draw particles particles.update(deltaTime); particles.draw(context, image1); } // handle (re-)sizing of the canvas //定义一个方法，初始化画布的大小 function onResize() { canvas.width = canvas.clientWidth; canvas.height = canvas.clientHeight; } window.onresize = onResize; // delay rendering bootstrap //定义一个延迟呈现引导的方法，10微秒后重设画布，并且重新渲染，模拟心跳的效果 setTimeout(function () { onResize(); render(); }, 10); var x = 0 setInterval(function () { if (x <= weight) { image1 = getImageAsc(x); } if (x > weight && x < 2 * weight) { image1 = getImageDesc(x - weight) } if (x == 2 * weight) { image1 = getImageDesc(x - weight) x = 0; } x++; }, 1000); }) (document.getElementById("pinkboard")); </SCRIPT> <script> </script> </BODY> </HTML> 2.
