李峋爱心跳动源码——理科生的浪漫
最近女朋友沉迷于一部电视剧《点燃我温暖你》，于是乎我的家庭地位进一步下降，因为男主“李峋”已经变成了她的大老公，我只是能被打入冷宫。先给大家看看我头号“情敌”的帅照：
虽然之前也给她用代码画过花，但她还是极度羡慕以及渴望我也能给她写一个，让她能体会到公主殿下的快乐！所以，为了满足她的“攀比心”，我连夜给她实现了粉红色爱心的跳动，让她看到满满的爱意。
先看看最终的实现效果吧：
再来看看代码部分：
1、先前工作
import random
from math import sin, cos, pi, log
from tkinter import *
CANVAS_WIDTH = 840 # 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 = 11 # 放大比例
HEART_COLOR = "#Fd798f" # 粉红色
2、爱心函数生成器
def heart_function(t, shrink_ratio: float = IMAGE_ENLARGE):
"""
:param shrink_ratio: 放大比例
:param t: 参数
:return: 坐标
"""
# 基础函数
x = 17 * (sin(t) ** 3)
y = -(16 * cos(t) - 5 * cos(2 * t) - 2 * cos(3 * t) - cos(3 * t))
# 放大
#x *= shrink_ratio
#y *= shrink_ratio
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)
3、随机内部扩散
def scatter_inside(x, y, beta=0.15):
"""
: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
4、抖动
def shrink(x, y, ratio):
"""
: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) ** 0.6) # 这个参数...
dx = ratio * force * (x - CANVAS_CENTER_X)
dy = ratio * force * (y - CANVAS_CENTER_Y)
return x - dx, y - dy
5、自定义曲线函数，调整跳动周期
def curve(p):
"""
:param p: 参数
:return: 正弦
"""
return 2 * (2 * sin(4 * p)) / (2 * pi)
6、爱心类
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(2000)
self.random_halo = 1000
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, 2 * 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(10000):
x, y = random.choice(point_list)
x, y = scatter_inside(x, y, 0.27)
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) ** 0.420) # 魔法参数
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 = 15 * 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, 2 * pi) # 随机不到的地方造成爱心有缺口
x, y = heart_function(t, shrink_ratio=-15) # 魔法参数
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(-60, 60)
y += random.randint(-60, 60)
size = random.choice((1, 1, 2))
all_points.append((x, y, size))
all_points.append((x+20, y+20, size))
all_points.append((x-20, y -20, size))
all_points.append((x+20, y - 20, size))
all_points.append((x - 20, y +20, 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)
7、画
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(1, draw, main, render_canvas, render_heart, render_frame + 1)
8、main()函数
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()
