给好朋友用代码画一个爱心吧


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 <BODY>
  <canvas id="pinkboard">canvas>
  <script>
  /*
 * Settings
 */
   arr=new Array(21);
  arr[0]='Only for you';
  arr[1]='You make my heart smile';
  arr[2]='My heart is with you';
  arr[3]='First impression of you is most lasting';
  arr[4]='Love me little and love me long';
  arr[5]='Brief is life, but love is long';
  arr[6]='因为你，我的心脏总是忙个不停';
  arr[7]='喜欢有很多种吧，无论是哪一种我都想给你';
  arr[8]='你是我一生只会遇见一次的惊喜';
  arr[9]='未曾相逢先一笑，初会便已许平生';
  arr[10]='I think I like it';
  arr[11]='愿言配德兮，携手相将';
  arr[12]='你撇下半天风韵，我拾得万种思量';
  arr[13]='相见情已深，未语可知心';
  arr[14]='只愿君心似我心，定不负相思意';
  arr[15]='有人可爱，有梦可待';
  arr[16]='初见倾心，再见痴心';
  arr[17]='How about being my girlfriend';
  arr[18]='I love you';
  arr[19]='我想和你走一段路';
  arr[20]='时间得意 ，春风嘉许， 我遇上你';
  index0 = Math.floor(Math.random() * arr.length);
  window.document.title=arr[index0]
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 Möller
 */
(function(){var b=0;var c=["ms","moz","webkit","o"];for(var a=0;alength&&!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) {
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    this.y = (typeof y !== 'undefined') ? y : 0;
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  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
    tips=new Array(42);
    tips[0]='#FFE4E1';
    tips[1]='#E6E6FA';
    tips[2]='#F0FFF0';
    tips[3]='#FFFFF0';
    tips[4]='#FFFAFA';
    tips[6]='#F8F8FF';
    tips[7]='#BBFFFF';
    tips[8]='#97FFFF';
    tips[9]='#C1FFC1';
    tips[10]='#87CEEB';
    tips[11]='#C0FF3E';
    tips[12]='#00FFFF';
    tips[13]='#FFEC8B';
    tips[14]='#FFFFE0';
    tips[15]='#FFC1C1';
    tips[16]='#FF6A6A';
    tips[17]='#FA8072';
    tips[18]='#FFB6C1';
    tips[19]='#FF3030';
    tips[20]='#D8BFD8';
    tips[21]='#FFE4C4';
    tips[22]='#FF4500';
    tips[23]='#FFDEAD';
    tips[24]='#FFB5C5';
    tips[25]='#FFAEB9';
    tips[26]='#F0FFF0';
    tips[27]='#FFF0F5';
    tips[28]='#FFE4E1';
    tips[29]='#F0FFFF';
    tips[30]='#EE00EE';
    tips[31]='#00BFFF';
    tips[32]='#D15FEE';
    tips[33]='#B0E2FF';
    tips[34]='#FFE1FF';
    tips[35]='#BFEFFF';
    tips[36]='#90EE90';
    tips[37]='#9B30FF';
    tips[38]='#FF0000';
    tips[39]='#FF6347';
    tips[40]='#F8F8FF';
    tips[41]='#FFFACD';
    index1 = Math.floor(Math.random() * tips.length);
    context.fillStyle = tips[index1];
    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>
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python


import random
from math import sin, cos, pi, log
from tkinter import *
CANVAS_WIDTH = 880  # 画布的宽
CANVAS_HEIGHT = 680 # 画布的高
CANVAS_CENTER_X = CANVAS_WIDTH / 2  # 画布中心的X轴坐标
CANVAS_CENTER_Y = CANVAS_HEIGHT / 2  # 画布中心的Y轴坐标
IMAGE_ENLARGE = 8 # 放大比例
HEART_COLOR = "#FF3E96"  # 心的颜色
 
def heart_function(t):
    """
    “爱心函数生成器”
    :param t: 参数
    :return: 坐标
    """
    # 基础函数
    x = 16 * (sin(t) ** 3)
    y = -(13 * cos(t) - 5 * cos(2 * t) - 2 * cos(3 * t) - cos(4 * t))
 
    # 放大
    x *= IMAGE_ENLARGE
    y *= IMAGE_ENLARGE
    # 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):
    """
    随机内部扩散
    :param x: 原x
    :param y: 原y
    :param beta: 强度
    :return: 新坐标
    """
    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):
    """
    抖动
    :param x: 原x
    :param y: 原y
    :param ratio: 比例
    :return: 新坐标
    """
    force = -1 / (((x - CANVAS_CENTER_X) ** 2 + (y - CANVAS_CENTER_Y) ** 2) ** 0.7)  # 这个参数...
    dx = ratio * force * (x - CANVAS_CENTER_X)
    dy = ratio * force * (y - CANVAS_CENTER_Y)
    return x - dx, y - dy
 
 
def curve(p):
    """
    自定义曲线函数，调整跳动周期
    :param p: 参数
    :return: 正弦
    """
    return 4 * (4* sin(4* p)) / (2 * pi)
 
 
class Heart:
    """
    爱心类
    """
 
    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(20000)
 
        self.random_halo = 10000
 
        self.generate_frame = generate_frame
        for frame in range(generate_frame):
            self.calc(frame)
 
    def build(self, number):
        # 爱心
        for _ in range(number):
            t = random.uniform(0, 3 * pi)  # 随机不到的地方造成爱心有缺口
            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(5000):
            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):
        # 调整缩放比例
        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)  # 圆滑的周期的缩放比例
 
        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()  # 光环的点坐标集合
        for _ in range(halo_number):
            t = random.uniform(0, 3* pi)  # 随机不到的地方造成爱心有缺口
            x, y = heart_function(t)
            x, y = shrink(x, y, halo_radius)
            if (x, y) not in heart_halo_point:
                # 处理新的点
                heart_halo_point.add((x, y))
                x += random.randint(-11, 11)
                y += random.randint(-11, 11)
                size = random.choice((1, 2, 2))#控制外围粒子的大小
                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._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.mainloop()

如果你想将html弄成大家可以浏览器打开的形式，大家就自行百度学习啦。

浅浅分析一下《燃烧我，照亮你》剧中的爱心代码

就是最近有部阿瑟很火的剧嘛，里面男主给女主画了一个爱心，我也想复刻一下（最终只能成效果二那样的爱心）。我最先通过观察视频里女主的代码是这样的

于是咱们去找找源码，发现源码来源于这个网址

C++17 - Draw a Valentine's Day heart shape | Solarian Programmer

其剧中的那段代码就应该是这一段了

可惜运行它你只能得到一个简单的爱心，我想一定是我水平问题，于是咱们去b站码农高夫的博主那里学习了一下，最终得到了这样的效果

但好像似乎与剧中的这个效果还是有点差别

这是什么问题呢，但又从剧这个图里面发现

好像女主前后播放的不是一个图，前者更像是用视频剪辑做成的，后者更像代码编写的。于是咱们得出结论，首先女主最先使用c语言编写的爱心，但如果真的用c来写，估计会麻烦死，其次爱心可以通过代码复刻出大致的效果，但要达到剧中的效果估计得有后期渲染。

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原文地址：https://blog.csdn.net/qq_55977554/article/details/127793709