Shulou(Shulou.com)06/02 Report--

This article mainly explains "how to use Python to realize that gamers can run forward and backward". The explanation in this article is simple and clear, easy to learn and understand. Please follow the ideas of Xiaobian and go deep into it slowly to study and learn "how to use Python to realize that gamers can run forward and backward"!

Place scroll in side scroll bar

If you want your players to be able to move backwards, you need a trigger point to move forwards and backwards. These two points are just two variables. Set them each approximately 100 or 200 pixels from the edge of each screen. Create variables in your settings section. In the following code, the first two lines are used for context, so you only need to add the code after this line:

player_list.add(player)steps = 10forwardX = 600backwardX = 230

In the main loop, check to see if your player sprite is at the forward x or backward x scroll point. If so, move left or right using the platform, depending on whether the world is moving forward or backward. In the following code, the last three lines are for your reference only:

# scroll the world forward if player.rect.x >= forwardx: scroll = player.rect.x - forwardx player.rect.x = forwardx for p in plat_list: p.rect.x -= scroll # scroll the world backward if player.rect.x = forwardx: scroll = player.rect.x - forwardx player.rect.x = forwardx for p in plat_list: p.rect.x -= scroll for e in enemy_list: e.rect.x -= scroll

Roll in the other direction:

# scroll the world backward if player.rect.x worldy and self.movey >= 0: self.movey = 0 self.rect.y = worldy-ty def control(self,x,y): ''' control player movement ''' self.movex += x self.movey += y def update(self): ''' Update sprite position ''' self.rect.x = self.rect.x + self.movex self.rect.y = self.rect.y + self.movey # moving left if self.movex

< 0: self.frame += 1 if self.frame >

ani*3: self.frame = 0 self.image = self.images[self.frame//ani] # moving right if self.movex > 0: self.frame += 1 if self.frame > ani*3: self.frame = 0 self.image = self.images[(self.frame//ani)+4] # collisions enemy_hit_list = pygame.sprite.spritecollide(self, enemy_list, False) for enemy in enemy_hit_list: self.health -= 1 #print(self.health) plat_hit_list = pygame.sprite.spritecollide(self, plat_list, False) for p in plat_hit_list: self.collide_delta = 0 # stop jumping self.movey = 0 if self.rect.y > p.rect.y: self.rect.y = p.rect.y+ty else: self.rect.y = p.rect.y-ty ground_hit_list = pygame.sprite.spritecollide(self, ground_list, False) for g in ground_hit_list: self.movey = 0 self.rect.y = worldy-ty-ty self.collide_delta = 0 # stop jumping if self.rect.y > g.rect.y: self.health -=1 print(self.health) if self.collide_delta

< 6 and self.jump_delta < 6: self.jump_delta = 6*2 self.movey -= 33 # how high to jump self.collide_delta += 6 self.jump_delta += 6 class Enemy(pygame.sprite.Sprite): ''' Spawn an enemy ''' def __init__(self,x,y,img): pygame.sprite.Sprite.__init__(self) self.image = pygame.image.load(os.path.join('images',img)) self.movey = 0 #self.image.convert_alpha() #self.image.set_colorkey(ALPHA) self.rect = self.image.get_rect() self.rect.x = x self.rect.y = y self.counter = 0 def move(self): ''' enemy movement ''' distance = 80 speed = 8 self.movey += 3.2 if self.counter >

= 0 and self.counter = distance and self.counter = worldy-ty-ty: self.rect.y += self.movey plat_hit_list = pygame.sprite.spritecollide(self, plat_list, False) for p in plat_hit_list: self.movey = 0 if self.rect.y > p.rect.y: self.rect.y = p.rect.y+ty else: self.rect.y = p.rect.y-ty ground_hit_list = pygame.sprite.spritecollide(self, ground_list, False) for g in ground_hit_list: self.rect.y = worldy-ty-ty class Level(): def bad(lvl,eloc): if lvl == 1: enemy = Enemy(eloc[0],eloc[1],'yeti.png') # spawn enemy enemy_list = pygame.sprite.Group() # create enemy group enemy_list.add(enemy) # add enemy to group if lvl == 2: print("Level " + str(lvl) ) return enemy_list def loot(lvl,lloc): print(lvl) def ground(lvl,gloc,tx,ty): ground_list = pygame.sprite.Group() i=0 if lvl == 1: while i < len(gloc): ground = Platform(gloc[i],worldy-ty,tx,ty,'ground.png') ground_list.add(ground) i=i+1 if lvl == 2: print("Level " + str(lvl) ) return ground_list def platform(lvl,tx,ty): plat_list = pygame.sprite.Group() ploc = [] i=0 if lvl == 1: ploc.append((0,worldy-ty-128,3)) ploc.append((300,worldy-ty-256,3)) ploc.append((500,worldy-ty-128,4)) while i < len(ploc): j=0 while j

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.