目录
前言
环境准备
代码编写
效果展示
前言
实现浪漫的烟花特效
现在很多地方都不能放烟花了，既然看不到，
那作为程序猿的我们还不能自己用代码做一个吗？
今天就带大家用代码做一个烟花特效吧 。
环境准备
这里使用到的库有：（用于游戏的编写）、（用于产生随机范围数）、math（用于数学计算），期中属于第三方模块，如果未安装该模块可以使用命令：pip进行安装 。
【含源码，用Python实现浪漫烟花】pip install pygame
代码编写
全局变量：
vector = pygame.math.Vector2# 重力变量gravity = vector(0, 0.3)# 控制窗口的大小DISPLAY_WIDTH = DISPLAY_HEIGHT = 800# 颜色选项trail_colours = [(45, 45, 45), (60, 60, 60), (75, 75, 75), (125, 125, 125), (150, 150, 150)]dynamic_offset = 1static_offset = 3
: 整体部分
class Firework:def __init__(self):# 随机颜色self.colour = (randint(0, 255), randint(0, 255), randint(0, 255))self.colours = ((randint(0, 255), randint(0, 255), randint(0, 255)),(randint(0, 255), randint(0, 255), randint(0, 255)),(randint(0, 255), randint(0, 255), randint(0, 255)))self.firework = Particle(randint(0, DISPLAY_WIDTH), DISPLAY_HEIGHT, True,self.colour)# Creates the firework particleself.exploded = Falseself.particles = []self.min_max_particles = vector(100, 225)def update(self, win):# 每帧调用if not self.exploded:self.firework.apply_force(gravity)self.firework.move()for tf in self.firework.trails:tf.show(win)self.show(win)if self.firework.vel.y >= 0:self.exploded = Trueself.explode()else:for particle in self.particles:particle.apply_force(vector(gravity.x + uniform(-1, 1) / 20, gravity.y / 2 + (randint(1, 8) / 100)))particle.move()for t in particle.trails:t.show(win)particle.show(win)def explode(self):# amount 数量amount = randint(self.min_max_particles.x, self.min_max_particles.y)for i in range(amount):self.particles.append(Particle(self.firework.pos.x, self.firework.pos.y, False, self.colours))def show(self, win):pygame.draw.circle(win, self.colour, (int(self.firework.pos.x), int(self.firework.pos.y)), self.firework.size)def remove(self):if self.exploded:for p in self.particles:if p.remove is True:self.particles.remove(p)if len(self.particles) == 0:return Trueelse:return False
文章插图
：烟花粒子（包含轨迹）
class Particle:def __init__(self, x, y, firework, colour):self.firework = fireworkself.pos = vector(x, y)self.origin = vector(x, y)self.radius = 20self.remove = Falseself.explosion_radius = randint(5, 18)self.life = 0self.acc = vector(0, 0)# trail variablesself.trails = []# stores the particles trail objectsself.prev_posx = [-10] * 10# stores the 10 last positionsself.prev_posy = [-10] * 10# stores the 10 last positionsif self.firework:self.vel = vector(0, -randint(17, 20))self.size = 5self.colour = colourfor i in range(5):self.trails.append(Trail(i, self.size, True))else:self.vel = vector(uniform(-1, 1), uniform(-1, 1))self.vel.x *= randint(7, self.explosion_radius + 2)self.vel.y *= randint(7, self.explosion_radius + 2)# 向量self.size = randint(2, 4)self.colour = choice(colour)# 5 个 tails总计for i in range(5):self.trails.append(Trail(i, self.size, False))def apply_force(self, force):self.acc += forcedef move(self):if not self.firework:self.vel.x *= 0.8self.vel.y *= 0.8self.vel += self.accself.pos += self.velself.acc *= 0if self.life == 0 and not self.firework:# 检查粒子的爆炸范围distance = math.sqrt((self.pos.x - self.origin.x) ** 2 + (self.pos.y - self.origin.y) ** 2)if distance > self.explosion_radius:self.remove = Trueself.decay()self.trail_update()self.life += 1def show(self, win):pygame.draw.circle(win, (self.colour[0], self.colour[1], self.colour[2], 0), (int(self.pos.x), int(self.pos.y)),self.size)def decay(self):# random decay of the particlesif 50 > self.life > 10:# early stage their is a small chance of decayran = randint(0, 30)if ran == 0:self.remove = Trueelif self.life > 50:ran = randint(0, 5)if ran == 0:self.remove = Truedef trail_update(self):self.prev_posx.pop()self.prev_posx.insert(0, int(self.pos.x))self.prev_posy.pop()self.prev_posy.insert(0, int(self.pos.y))for n, t in enumerate(self.trails):if t.dynamic:t.get_pos(self.prev_posx[n + dynamic_offset], self.prev_posy[n + dynamic_offset])else:t.get_pos(self.prev_posx[n + static_offset], self.prev_posy[n + static_offset])
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