Python烟花代码，用Python制作一个烟花特效 |
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Python烟花代码，用Python制作一个烟花特效
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Python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。
pygame介绍 关于Pygame的基本信息，pygame是什么，谁会被Pygame吸引，并且在哪里找到它。 Pygame是被设计用来写游戏的python模块集合，Pygame是在优秀的SDL库之上开发的功能性包。使用python可以导入pygame来开发具有全部特性的游戏和多媒体软件，Pygame是极度轻便的并且可以运行在几乎所有的平台和操作系统上。Pygame包已经被下载过成千上万次，并且也被访问过成千上万次。 Pygame是免费的，发行遵守GPL，你可以利用它开发开源的、免费的、免费软件、共享件、还有商业软件等等。如果想要看到关于以上全部详细信息请看GPL . 对于初学者可以查看 line-by-line chimp turtorial,或者是对python程序员查看第17~20章 通过python开发属于你自己的电脑游戏 环境准备 这里使用到的库有：pygame（用于游戏的编写）、random（用于产生随机范围数）、math（用于数学计算），期中pygame属于第三方模块，如果未安装该模块可以使用命令：pip install pygame 进行安装。 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 = 1 static_offset = 3Firework : 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 particle self.exploded = False self.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 = True self.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 True else: return FalseParticle：烟花粒子（包含轨迹） class Particle: def __init__(self, x, y, firework, colour): self.firework = firework self.pos = vector(x, y) self.origin = vector(x, y) self.radius = 20 self.remove = False self.explosion_radius = randint(5, 18) self.life = 0 self.acc = vector(0, 0) # trail variables self.trails = [] # stores the particles trail objects self.prev_posx = [-10] * 10 # stores the 10 last positions self.prev_posy = [-10] * 10 # stores the 10 last positions if self.firework: self.vel = vector(0, -randint(17, 20)) self.size = 5 self.colour = colour for 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 += force def move(self): if not self.firework: self.vel.x *= 0.8 self.vel.y *= 0.8 self.vel += self.acc self.pos += self.vel self.acc *= 0 if 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 = True self.decay() self.trail_update() self.life += 1 def 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 particles if 50 > self.life > 10: # early stage their is a small chance of decay ran = randint(0, 30) if ran == 0: self.remove = True elif self.life > 50: ran = randint(0, 5) if ran == 0: self.remove = True def 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])Trail：烟花轨迹，本质上是一个点 。创建 Trail 类，定义 show 方法绘制轨迹 、get_pos 实时获取轨迹坐标 class Trail: def __init__(self, n, size, dynamic): self.pos_in_line = n self.pos = vector(-10, -10) self.dynamic = dynamic if self.dynamic: self.colour = trail_colours[n] self.size = int(size - n / 2) else: self.colour = (255, 255, 200) self.size = size - 2 if self.size |
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