python 爱心代码

python程序代码：heart.py

from math import cos, piimport numpy as npimport cv2import os, globclass HeartSignal:    def __init__(self, curve="heart", title="Love U", frame_num=20, seed_points_num=2000, seed_num=None, highlight_rate=0.3,                 background_img_dir="", set_bg_imgs=False, bg_img_scale=0.2, bg_weight=0.3, curve_weight=0.7, frame_width=1080, frame_height=960, scale=10.1,                 base_color=None, highlight_points_color_1=None, highlight_points_color_2=None, wait=100, n_star=5, m_star=2):        super().__init__()        self.curve = curve        self.title = title        self.highlight_points_color_2 = highlight_points_color_2        self.highlight_points_color_1 = highlight_points_color_1        self.highlight_rate = highlight_rate        self.base_color = base_color        self.n_star = n_star        self.m_star = m_star        self.curve_weight = curve_weight        img_paths = glob.glob(background_img_dir + "/*")        self.bg_imgs = []        self.set_bg_imgs = set_bg_imgs        self.bg_weight = bg_weight        if os.path.exists(background_img_dir) and len(img_paths) > 0 and set_bg_imgs:            for img_path in img_paths:                img = cv2.imread(img_path)                self.bg_imgs.append(img)            first_bg = self.bg_imgs[0]            width = int(first_bg.shape[1] * bg_img_scale)            height = int(first_bg.shape[0] * bg_img_scale)            first_bg = cv2.resize(first_bg, (width, height), interpolation=cv2.INTER_AREA)            # 对齐图片，自动裁切中间            new_bg_imgs = [first_bg, ]            for img in self.bg_imgs[1:]:                width_close = abs(first_bg.shape[1] - img.shape[1]) < abs(first_bg.shape[0] - img.shape[0])                if width_close:                    # resize                    height = int(first_bg.shape[1] / img.shape[1] * img.shape[0])                    width = first_bg.shape[1]                    img = cv2.resize(img, (width, height), interpolation=cv2.INTER_AREA)                    # crop and fill                    if img.shape[0] > first_bg.shape[0]:                        crop_num = img.shape[0] - first_bg.shape[0]                        crop_top = crop_num // 2                        crop_bottom = crop_num - crop_top                        img = np.delete(img, range(crop_top), axis=0)                        img = np.delete(img, range(img.shape[0] - crop_bottom, img.shape[0]), axis=0)                    elif img.shape[0] < first_bg.shape[0]:                        fill_num = first_bg.shape[0] - img.shape[0]                        fill_top = fill_num // 2                        fill_bottom = fill_num - fill_top                        img = np.concatenate([np.zeros([fill_top, width, 3]), img, np.zeros([fill_bottom, width, 3])], axis=0)                else:                    width = int(first_bg.shape[0] / img.shape[0] * img.shape[1])                    height = first_bg.shape[0]                    img = cv2.resize(img, (width, height), interpolation=cv2.INTER_AREA)                    # crop and fill                    if img.shape[1] > first_bg.shape[1]:                        crop_num = img.shape[1] - first_bg.shape[1]                        crop_top = crop_num // 2                        crop_bottom = crop_num - crop_top                        img = np.delete(img, range(crop_top), axis=1)                        img = np.delete(img, range(img.shape[1] - crop_bottom, img.shape[1]), axis=1)                    elif img.shape[1] < first_bg.shape[1]:                        fill_num = first_bg.shape[1] - img.shape[1]                        fill_top = fill_num // 2                        fill_bottom = fill_num - fill_top                        img = np.concatenate([np.zeros([fill_top, width, 3]), img, np.zeros([fill_bottom, width, 3])], axis=1)                new_bg_imgs.append(img)            self.bg_imgs = new_bg_imgs            assert all(img.shape[0] == first_bg.shape[0] and img.shape[1] == first_bg.shape[1] for img in self.bg_imgs), "背景图片宽和高不一致"            self.frame_width = self.bg_imgs[0].shape[1]            self.frame_height = self.bg_imgs[0].shape[0]        else:            self.frame_width = frame_width  # 窗口宽度            self.frame_height = frame_height  # 窗口高度        self.center_x = self.frame_width / 2        self.center_y = self.frame_height / 2        self.main_curve_width = -1        self.main_curve_height = -1        self.frame_points = []  # 每帧动态点坐标        self.frame_num = frame_num  # 帧数        self.seed_num = seed_num  # 伪随机种子，设置以后除光晕外粒子相对位置不动（减少内部闪烁感）        self.seed_points_num = seed_points_num  # 主图粒子数        self.scale = scale  # 缩放比例        self.wait = wait    def curve_function(self, curve):        curve_dict = {            "heart": self.heart_function,            "butterfly": self.butterfly_function,            "star": self.star_function,        }        return curve_dict[curve]    def heart_function(self, t, frame_idx=0, scale=5.20):        """        图形方程        :param frame_idx: 帧的索引，根据帧数变换心形        :param scale: 放大比例        :param t: 参数        :return: 坐标        """        trans = 3 - (1 + self.periodic_func(frame_idx, self.frame_num)) * 0.5  # 改变心形饱满度度的参数        x = 15 * (np.sin(t) ** 3)        t = np.where((pi < t) & (t < 2 * pi), 2 * pi - t, t)  # 翻转x > 0部分的图形到3、4象限        y = -(14 * np.cos(t) - 4 * np.cos(2 * t) - 2 * np.cos(3 * t) - np.cos(trans * t))        ign_area = 0.15        center_ids = np.where((x > -ign_area) & (x < ign_area))        if np.random.random() > 0.32:            x, y = np.delete(x, center_ids), np.delete(y, center_ids)  # 删除稠密部分的扩散，为了美观        # 放大        x *= scale        y *= scale        # 移到画布中央        x += self.center_x        y += self.center_y        # 原心形方程        # x = 15 * (sin(t) ** 3)        # y = -(14 * cos(t) - 4 * cos(2 * t) - 2 * cos(3 * t) - cos(3 * t))        return x.astype(int), y.astype(int)    def butterfly_function(self, t, frame_idx=0, scale=5.2):        """        图形函数        :param frame_idx:        :param scale: 放大比例        :param t: 参数        :return: 坐标        """        # 基础函数        # t = t * pi        p = np.exp(np.sin(t)) - 2.5 * np.cos(4 * t) + np.sin(t) ** 5        x = 5 * p * np.cos(t)        y = - 5 * p * np.sin(t)        # 放大        x *= scale        y *= scale        # 移到画布中央        x += self.center_x        y += self.center_y        return x.astype(int), y.astype(int)    def star_function(self, t, frame_idx=0, scale=5.2):        n = self.n_star / self.m_star        p = np.cos(pi / n) / np.cos(pi / n - (t % (2 * pi / n)))        x = 15 * p * np.cos(t)        y = 15 * p * np.sin(t)        # 放大        x *= scale        y *= scale        # 移到画布中央        x += self.center_x        y += self.center_y        return x.astype(int), y.astype(int)    def shrink(self, x, y, ratio, offset=1, p=0.5, dist_func="uniform"):        """        带随机位移的抖动        :param x: 原x        :param y: 原y        :param ratio: 缩放比例        :param p:        :param offset:        :return: 转换后的x,y坐标        """        x_ = (x - self.center_x)        y_ = (y - self.center_y)        force = 1 / ((x_ ** 2 + y_ ** 2) ** p + 1e-30)        dx = ratio * force * x_        dy = ratio * force * y_        def d_offset(x):            if dist_func == "uniform":                return x + np.random.uniform(-offset, offset, size=x.shape)            elif dist_func == "norm":                return x + offset * np.random.normal(0, 1, size=x.shape)        dx, dy = d_offset(dx), d_offset(dy)        return x - dx, y - dy    def scatter(self, x, y, alpha=0.75, beta=0.15):        """        随机内部扩散的坐标变换        :param alpha: 扩散因子 - 松散        :param x: 原x        :param y: 原y        :param beta: 扩散因子 - 距离        :return: x,y 新坐标        """        ratio_x = - beta * np.log(np.random.random(x.shape) * alpha)        ratio_y = - beta * np.log(np.random.random(y.shape) * alpha)        dx = ratio_x * (x - self.center_x)        dy = ratio_y * (y - self.center_y)        return x - dx, y - dy    def periodic_func(self, x, x_num):        """        跳动周期曲线        :param p: 参数        :return: y        """        # 可以尝试换其他的动态函数，达到更有力量的效果（贝塞尔？）        def ori_func(t):            return cos(t)        func_period = 2 * pi        return ori_func(x / x_num * func_period)    def gen_points(self, points_num, frame_idx, shape_func):        # 用周期函数计算得到一个因子，用到所有组成部件上，使得各个部分的变化周期一致        cy = self.periodic_func(frame_idx, self.frame_num)        ratio = 10 * cy        # 图形        period = 2 * pi * self.m_star if self.curve == "star" else 2 * pi        seed_points = np.linspace(0, period, points_num)        seed_x, seed_y = shape_func(seed_points, frame_idx, scale=self.scale)        x, y = self.shrink(seed_x, seed_y, ratio, offset=2)        curve_width, curve_height = int(x.max() - x.min()), int(y.max() - y.min())        self.main_curve_width = max(self.main_curve_width, curve_width)        self.main_curve_height = max(self.main_curve_height, curve_height)        point_size = np.random.choice([1, 2], x.shape, replace=True, p=[0.5, 0.5])        tag = np.ones_like(x)        def delete_points(x_, y_, ign_area, ign_prop):            ign_area = ign_area            center_ids = np.where((x_ > self.center_x - ign_area) & (x_ < self.center_x + ign_area))            center_ids = center_ids[0]            np.random.shuffle(center_ids)            del_num = round(len(center_ids) * ign_prop)            del_ids = center_ids[:del_num]            x_, y_ = np.delete(x_, del_ids), np.delete(y_, del_ids)  # 删除稠密部分的扩散，为了美观            return x_, y_        # 多层次扩散        for idx, beta in enumerate(np.linspace(0.05, 0.2, 6)):            alpha = 1 - beta            x_, y_ = self.scatter(seed_x, seed_y, alpha, beta)            x_, y_ = self.shrink(x_, y_, ratio, offset=round(beta * 15))            x = np.concatenate((x, x_), 0)            y = np.concatenate((y, y_), 0)            p_size = np.random.choice([1, 2], x_.shape, replace=True, p=[0.55 + beta, 0.45 - beta])            point_size = np.concatenate((point_size, p_size), 0)            tag_ = np.ones_like(x_) * 2            tag = np.concatenate((tag, tag_), 0)        # 光晕        halo_ratio = int(7 + 2 * abs(cy))  # 收缩比例随周期变化        # 基础光晕        x_, y_ = shape_func(seed_points, frame_idx, scale=self.scale + 0.9)        x_1, y_1 = self.shrink(x_, y_, halo_ratio, offset=18, dist_func="unifORM")        x_1, y_1 = delete_points(x_1, y_1, 20, 0.5)        x = np.concatenate((x, x_1), 0)        y = np.concatenate((y, y_1), 0)        # 炸裂感光晕        halo_number = int(points_num * 0.6 + points_num * abs(cy))  # 光晕点数也周期变化        seed_points = np.random.uniform(0, 2 * pi, halo_number)        x_, y_ = shape_func(seed_points, frame_idx, scale=self.scale + 0.9)        x_2, y_2 = self.shrink(x_, y_, halo_ratio, offset=int(6 + 15 * abs(cy)), dist_func="norm")        x_2, y_2 = delete_points(x_2, y_2, 20, 0.5)        x = np.concatenate((x, x_2), 0)        y = np.concatenate((y, y_2), 0)        # 膨胀光晕        x_3, y_3 = shape_func(np.linspace(0, 2 * pi, int(points_num * .4)),                 frame_idx, scale=self.scale + 0.2)        x_3, y_3 = self.shrink(x_3, y_3, ratio * 2, offset=6)        x = np.concatenate((x, x_3), 0)        y = np.concatenate((y, y_3), 0)        halo_len = x_1.shape[0] + x_2.shape[0] + x_3.shape[0]        p_size = np.random.choice([1, 2, 3], halo_len, replace=True, p=[0.7, 0.2, 0.1])        point_size = np.concatenate((point_size, p_size), 0)        tag_ = np.ones(halo_len) * 2 * 3        tag = np.concatenate((tag, tag_), 0)        x_y = np.around(np.stack([x, y], axis=1), 0)        x, y = x_y[:, 0], x_y[:, 1]        return x, y, point_size, tag    def get_frames(self, shape_func):        for frame_idx in range(self.frame_num):            np.random.seed(self.seed_num)            self.frame_points.append(self.gen_points(self.seed_points_num, frame_idx, shape_func))        frames = []        def add_points(frame, x, y, size, tag):            highlight1 = np.array(self.highlight_points_color_1, dtype='uint8')            highlight2 = np.array(self.highlight_points_color_2, dtype='uint8')            base_col = np.array(self.base_color, dtype='uint8')            x, y = x.astype(int), y.astype(int)            frame[y, x] = base_col            size_2 = np.int64(size == 2)            frame[y, x + size_2] = base_col            frame[y + size_2, x] = base_col            size_3 = np.int64(size == 3)            frame[y + size_3, x] = base_col            frame[y - size_3, x] = base_col            frame[y, x + size_3] = base_col            frame[y, x - size_3] = base_col            frame[y + size_3, x + size_3] = base_col            frame[y - size_3, x - size_3] = base_col            # frame[y - size_3, x + size_3] = color            # frame[y + size_3, x - size_3] = color            # 高光            random_sample = np.random.choice([1, 0], size=tag.shape, p=[self.highlight_rate, 1 - self.highlight_rate])            # tag2_size1 = np.int64((tag <= 2) & (size == 1) & (random_sample == 1))            # frame[y * tag2_size1, x * tag2_size1] = highlight2            tag2_size2 = np.int64((tag <= 2) & (size == 2) & (random_sample == 1))            frame[y * tag2_size2, x * tag2_size2] = highlight1            # frame[y * tag2_size2, (x + 1) * tag2_size2] = highlight2            # frame[(y + 1) * tag2_size2, x * tag2_size2] = highlight2            frame[(y + 1) * tag2_size2, (x + 1) * tag2_size2] = highlight2        for x, y, size, tag in self.frame_points:            frame = np.zeros([self.frame_height, self.frame_width, 3], dtype="uint8")            add_points(frame, x, y, size, tag)            frames.append(frame)        return frames    def draw(self, times=10):        frames = self.get_frames(self.curve_function(self.curve))        for i in range(times):            for frame in frames:                frame = cv2.cvtColor(frame, cv2.COLOR_RGB2BGR)                if len(self.bg_imgs) > 0 and self.set_bg_imgs:                    frame = cv2.addWeighted(self.bg_imgs[i % len(self.bg_imgs)], self.bg_weight, frame, self.curve_weight, 0)                cv2.imshow(self.title, frame)                cv2.waiTKEy(self.wait)if __name__ == '__main__':    import yaml    settings = yaml.load(open("./settings.yaml", "r", encoding="utf-8"), Loader=yaml.FullLoader)    if settings["wait"] == -1:        settings["wait"] = int(settings["period_time"] / settings["frame_num"])    del settings["period_time"]    times = settings["times"]    del settings["times"]    heart = HeartSignal(seed_num=5201314, **settings)    heart.draw(times)

其中也要到这个py文件的相同的文件夹里引入settings.yaml文件：

# 颜色：RGB三原色数值 0~255# 设置高光时，尽量选择接近主色的颜色，看起来会和谐一点# 视频里的蓝色调#base_color: # 主色  默认玫瑰粉#  - 30#  - 100#  - 100#highlight_points_color_1: # 高光粒子色1 默认淡紫色#  - 150#  - 120#  - 220#highlight_points_color_2: # 高光粒子色2 默认淡粉色#  - 128#  - 140#  - 140base_color: # 主色  默认玫瑰粉  - 228  - 100  - 100highlight_points_color_1: # 高光粒子色1 默认淡紫色  - 180  - 87  - 200highlight_points_color_2: # 高光粒子色2 默认淡粉色  - 228  - 140  - 140period_time: 1000 * 2  # 周期时间，默认1.5s一个周期times: 5 # 播放周期数，一个周期跳动1次frame_num: 24  # 一个周期的生成帧数wait: 60  # 每一帧停留时间, 设置太短可能造成闪屏，设置 -1 自动设置为 period_time / frame_numseed_points_num: 2000  # 构成主图的种子粒子数，总粒子数是这个的8倍左右（包括散点和光晕）highlight_rate: 0.2 # 高光粒子的比例frame_width: 720  # 窗口宽度，单位像素，设置背景图片后失效frame_height: 640  # 窗口高度，单位像素，设置背景图片后失效scale: 9.1  # 主图缩放比例curve: "butterfly"  # 图案类型：heart, butterfly, starn_star: 7 # n-角型/星，如果curve设置成star才会生效，五角星：n-star:5, m-star:2m_star: 3 # curve设置成star才会生效，n-角形 m-star都是1，n-角星 m-star大于1，比如 七角星：n-star:7, m-star:2 或 3title: "Love Li Xun"  # 仅支持字母，中文乱码background_img_dir: "src/center_imgs" # 这个目录放置背景图片，建议像素在400 X 400以上，否则可能报错，如果图片实在小，可以调整上面scale把爱心缩小set_bg_imgs: false # true或false，设置false用默认黑背景bg_img_scale: 0.6 # 0 - 1，背景图片缩放比例bg_weight: 0.4 # 0 - 1，背景图片权重，可看做透明度吧curve_weight: 1 # 同上# ======================== 推荐参数: 直接复制数值替换上面对应参数 ==================================# 蝴蝶，报错很可能是蝴蝶缩放大小超出窗口宽和高# curve: "butterfly"# frame_width: 800# frame_height: 720# scale: 60# base_color: [100, 100, 228]# highlight_points_color_1: [180, 87, 200]# highlight_points_color_2: [228, 140, 140]

本代码是搬运GitHub上的：

网址如下：

https://github.com/131250208/FunnyToys/blob/main/heart.py

演示：

来源地址：https://blog.csdn.net/CSH__/article/details/127935092