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| 1 | +#AI-driven AI Flappy Bird |
| 2 | +import pygame |
| 3 | +import neat |
| 4 | +import os |
| 5 | +import random |
| 6 | + |
| 7 | +# Game window size |
| 8 | +WINDOW_WIDTH = 500 |
| 9 | +WINDOW_HEIGHT = 800 |
| 10 | + |
| 11 | +# Bird images |
| 12 | +BIRD_IMAGES = [ |
| 13 | + pygame.transform.scale2x(pygame.image.load(os.path.join("images", "bird1.png"))), |
| 14 | + pygame.transform.scale2x(pygame.image.load(os.path.join("images", "bird2.png"))), |
| 15 | + pygame.transform.scale2x(pygame.image.load(os.path.join("images", "bird3.png"))) |
| 16 | +] |
| 17 | + |
| 18 | +# Pipe image |
| 19 | +PIPE_IMAGE = pygame.transform.scale2x(pygame.image.load(os.path.join("images", "pipe.png"))) |
| 20 | + |
| 21 | +# Base image |
| 22 | +BASE_IMAGE = pygame.transform.scale2x(pygame.image.load(os.path.join("images", "base.png"))) |
| 23 | + |
| 24 | +# Background image |
| 25 | +BG_IMAGE = pygame.transform.scale2x(pygame.image.load(os.path.join("images", "bg.png"))) |
| 26 | + |
| 27 | + |
| 28 | +class Bird: |
| 29 | + IMAGES = BIRD_IMAGES |
| 30 | + MAX_ROTATION = 25 |
| 31 | + ROTATION_VELOCITY = 20 |
| 32 | + ANIMATION_TIME = 5 |
| 33 | + |
| 34 | + def __init__(self, x, y): |
| 35 | + self.x = x |
| 36 | + self.y = y |
| 37 | + self.tilt = 0 |
| 38 | + self.tick_count = 0 |
| 39 | + self.velocity = 0 |
| 40 | + self.height = self.y |
| 41 | + self.image_count = 0 |
| 42 | + self.image = self.IMAGES[0] |
| 43 | + |
| 44 | + def jump(self): |
| 45 | + self.velocity = -10.5 |
| 46 | + self.tick_count = 0 |
| 47 | + self.height = self.y |
| 48 | + |
| 49 | + def move(self): |
| 50 | + self.tick_count += 1 |
| 51 | + displacement = self.velocity * self.tick_count + 1.5 * self.tick_count ** 2 |
| 52 | + |
| 53 | + if displacement >= 16: |
| 54 | + displacement = 16 |
| 55 | + |
| 56 | + if displacement < 0: |
| 57 | + displacement -= 2 |
| 58 | + |
| 59 | + self.y = self.y + displacement |
| 60 | + |
| 61 | + if displacement < 0 or self.y < self.height + 50: |
| 62 | + if self.tilt < self.MAX_ROTATION: |
| 63 | + self.tilt = self.MAX_ROTATION |
| 64 | + else: |
| 65 | + if self.tilt > -90: |
| 66 | + self.tilt -= self.ROTATION_VELOCITY |
| 67 | + |
| 68 | + def draw(self, win): |
| 69 | + self.image_count += 1 |
| 70 | + |
| 71 | + if self.image_count < self.ANIMATION_TIME: |
| 72 | + self.image = self.IMAGES[0] |
| 73 | + elif self.image_count < self.ANIMATION_TIME * 2: |
| 74 | + self.image = self.IMAGES[1] |
| 75 | + elif self.image_count < self.ANIMATION_TIME * 3: |
| 76 | + self.image = self.IMAGES[2] |
| 77 | + elif self.image_count < self.ANIMATION_TIME * 4: |
| 78 | + self.image = self.IMAGES[1] |
| 79 | + elif self.image_count == self.ANIMATION_TIME * 4 + 1: |
| 80 | + self.image = self.IMAGES[0] |
| 81 | + self.image_count = 0 |
| 82 | + |
| 83 | + if self.tilt <= -80: |
| 84 | + self.image = self.IMAGES[1] |
| 85 | + self.image_count = self.ANIMATION_TIME * 2 |
| 86 | + |
| 87 | + rotated_image = pygame.transform.rotate(self.image, self.tilt) |
| 88 | + new_rect = rotated_image.get_rect(center=self.image.get_rect(topleft=(self.x, self.y)).center) |
| 89 | + win.blit(rotated_image, new_rect.topleft) |
| 90 | + |
| 91 | + def get_mask(self): |
| 92 | + return pygame.mask.from_surface(self.image) |
| 93 | + |
| 94 | + |
| 95 | +class Pipe: |
| 96 | + GAP = 200 |
| 97 | + VEL = 5 |
| 98 | + |
| 99 | + def __init__(self, x): |
| 100 | + self.x = x |
| 101 | + self.height = 0 |
| 102 | + |
| 103 | + self.top = 0 |
| 104 | + self.bottom = 0 |
| 105 | + self.PIPE_TOP = pygame.transform.flip(PIPE_IMAGE, False, True) |
| 106 | + self.PIPE_BOTTOM = PIPE_IMAGE |
| 107 | + |
| 108 | + self.passed = False |
| 109 | + self.set_height() |
| 110 | + |
| 111 | + def set_height(self): |
| 112 | + self.height = random.randrange(50, 450) |
| 113 | + self.top = self.height - self.PIPE_TOP.get_height() |
| 114 | + self.bottom = self.height + self.GAP |
| 115 | + |
| 116 | + def move(self): |
| 117 | + self.x -= self.VEL |
| 118 | + |
| 119 | + def draw(self, win): |
| 120 | + win.blit(self.PIPE_TOP, (self.x, self.top)) |
| 121 | + win.blit(self.PIPE_BOTTOM, (self.x, self.bottom)) |
| 122 | + |
| 123 | + def collide(self, bird): |
| 124 | + bird_mask = bird.get_mask() |
| 125 | + top_mask = pygame.mask.from_surface(self.PIPE_TOP) |
| 126 | + bottom_mask = pygame.mask.from_surface(self.PIPE_BOTTOM) |
| 127 | + |
| 128 | + top_offset = (self.x - bird.x, self.top - round(bird.y)) |
| 129 | + bottom_offset = (self.x - bird.x, self.bottom - round(bird.y)) |
| 130 | + |
| 131 | + t_point = bird_mask.overlap(top_mask, top_offset) |
| 132 | + b_point = bird_mask.overlap(bottom_mask, bottom_offset) |
| 133 | + |
| 134 | + if t_point or b_point: |
| 135 | + return True |
| 136 | + |
| 137 | + return False |
| 138 | + |
| 139 | + |
| 140 | +class Base: |
| 141 | + VEL = 5 |
| 142 | + WIDTH = BASE_IMAGE.get_width() |
| 143 | + IMG = BASE_IMAGE |
| 144 | + |
| 145 | + def __init__(self, y): |
| 146 | + self.y = y |
| 147 | + self.x1 = 0 |
| 148 | + self.x2 = self.WIDTH |
| 149 | + |
| 150 | + def move(self): |
| 151 | + self.x1 -= self.VEL |
| 152 | + self.x2 -= self.VEL |
| 153 | + |
| 154 | + if self.x1 + self.WIDTH < 0: |
| 155 | + self.x1 = self.x2 + self.WIDTH |
| 156 | + |
| 157 | + if self.x2 + self.WIDTH < 0: |
| 158 | + self.x2 = self.x1 + self.WIDTH |
| 159 | + |
| 160 | + def draw(self, win): |
| 161 | + win.blit(self.IMG, (self.x1, self.y)) |
| 162 | + win.blit(self.IMG, (self.x2, self.y)) |
| 163 | + |
| 164 | + |
| 165 | +def draw_window(win, birds, pipes, base, score): |
| 166 | + win.blit(BG_IMAGE, (0, 0)) |
| 167 | + for pipe in pipes: |
| 168 | + pipe.draw(win) |
| 169 | + |
| 170 | + text = STAT_FONT.render("Score: " + str(score), 1, (255, 255, 255)) |
| 171 | + win.blit(text, (WINDOW_WIDTH - 10 - text.get_width(), 10)) |
| 172 | + |
| 173 | + base.draw(win) |
| 174 | + for bird in birds: |
| 175 | + bird.draw(win) |
| 176 | + pygame.display.update() |
| 177 | + |
| 178 | + |
| 179 | +def main(genomes, config): |
| 180 | + nets = [] |
| 181 | + ge = [] |
| 182 | + birds = [] |
| 183 | + |
| 184 | + for _, g in genomes: |
| 185 | + net = neat.nn.FeedForwardNetwork.create(g, config) |
| 186 | + nets.append(net) |
| 187 | + birds.append(Bird(230, 350)) |
| 188 | + g.fitness = 0 |
| 189 | + ge.append(g) |
| 190 | + |
| 191 | + base = Base(730) |
| 192 | + pipes = [Pipe(700)] |
| 193 | + win = pygame.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT)) |
| 194 | + clock = pygame.time.Clock() |
| 195 | + score = 0 |
| 196 | + |
| 197 | + run = True |
| 198 | + while run: |
| 199 | + clock.tick(30) |
| 200 | + for event in pygame.event.get(): |
| 201 | + if event.type == pygame.QUIT: |
| 202 | + run = False |
| 203 | + pygame.quit() |
| 204 | + quit() |
| 205 | + |
| 206 | + pipe_ind = 0 |
| 207 | + if len(birds) > 0: |
| 208 | + if len(pipes) > 1 and birds[0].x > pipes[0].x + pipes[0].PIPE_TOP.get_width(): |
| 209 | + pipe_ind = 1 |
| 210 | + else: |
| 211 | + run = False |
| 212 | + break |
| 213 | + |
| 214 | + for x, bird in enumerate(birds): |
| 215 | + bird.move() |
| 216 | + ge[x].fitness += 0.1 |
| 217 | + |
| 218 | + output = nets[x].activate((bird.y, abs(bird.y - pipes[pipe_ind].height), abs(bird.y - pipes[pipe_ind].bottom))) |
| 219 | + |
| 220 | + if output[0] > 0.5: |
| 221 | + bird.jump() |
| 222 | + |
| 223 | + add_pipe = False |
| 224 | + remove_pipes = [] |
| 225 | + for pipe in pipes: |
| 226 | + for x, bird in enumerate(birds): |
| 227 | + if pipe.collide(bird): |
| 228 | + ge[x].fitness -= 1 |
| 229 | + birds.pop(x) |
| 230 | + nets.pop(x) |
| 231 | + ge.pop(x) |
| 232 | + |
| 233 | + if not pipe.passed and pipe.x < bird.x: |
| 234 | + pipe.passed = True |
| 235 | + add_pipe = True |
| 236 | + |
| 237 | + if pipe.x + pipe.PIPE_TOP.get_width() < 0: |
| 238 | + remove_pipes.append(pipe) |
| 239 | + |
| 240 | + pipe.move() |
| 241 | + |
| 242 | + if add_pipe: |
| 243 | + score += 1 |
| 244 | + for g in ge: |
| 245 | + g.fitness += 5 |
| 246 | + pipes.append(Pipe(700)) |
| 247 | + |
| 248 | + for pipe in remove_pipes: |
| 249 | + pipes.remove(pipe) |
| 250 | + |
| 251 | + for x, bird in enumerate(birds): |
| 252 | + if bird.y + bird.image.get_height() >= 730 or bird.y < 0: |
| 253 | + birds.pop(x) |
| 254 | + nets.pop(x) |
| 255 | + ge.pop(x) |
| 256 | + |
| 257 | + base.move() |
| 258 | + draw_window(win, birds, pipes, base, score) |
| 259 | + |
| 260 | + |
| 261 | +def run_neat(): |
| 262 | + local_dir = os.path.dirname(__file__) |
| 263 | + config_path = os.path.join(local_dir, "config-feedforward.txt") |
| 264 | + config = neat.Config(neat.DefaultGenome, neat.DefaultReproduction, |
| 265 | + neat.DefaultSpeciesSet, neat.DefaultStagnation, |
| 266 | + config_path) |
| 267 | + |
| 268 | + population = neat.Population(config) |
| 269 | + population.add_reporter(neat.StdOutReporter(True)) |
| 270 | + stats = neat.StatisticsReporter() |
| 271 | + population.add_reporter(stats) |
| 272 | + |
| 273 | + winner = population.run(main, 50) |
| 274 | + |
| 275 | + print("\nBest genome:\n{!s}".format(winner)) |
| 276 | + |
| 277 | + |
| 278 | +if __name__ == "__main__": |
| 279 | + pygame.init() |
| 280 | + STAT_FONT = pygame.font.SysFont("comicsans", 50) |
| 281 | + run_neat() |
| 282 | + |
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