"Player2"无法做与"player"相同的事情

Question

import random
WIDTH = 800
HEIGHT = 500
background = Actor('background')
player = Actor('player')
enemy = Actor('enemy')
money = Actor('money', pos=(300, 300))
player2 = Actor('alien')
score = 0
score2 = 0
player.x = 200
player.y = 200

def draw():
screen.clear()
background.draw()
player.draw()
enemy.draw()
money.draw()
player2.draw()

def update():
global score
if keyboard.right:
player.x = player.x + 4
if keyboard.left:
player.x = player.x - 4
if keyboard.down:
player.y = player.y + 4
if keyboard.up:
player.y = player.y - 4
if player.x > WIDTH:
player.x = WIDTH
if player.x < 0:
player.x = 0
if player.y < 0:
player.y = 0
if player.y > HEIGHT:
player.y = HEIGHT
if enemy.x < player.x:
enemy.x = enemy.x + 1
if enemy.x > player.x:
enemy.x = enemy.x - 1
if enemy.y < player.y:
enemy.y = enemy.y + 1
if enemy.y > player.y:
enemy.y = enemy.y - 1
if player.colliderect(enemy):
exit()
if money.colliderect(player):
money.x = random.randint(0, WIDTH)
money.y = random.randint(0, HEIGHT)
score = score + 1
print ('Score:', score)
if keyboard.d:
player2.x = player2.x + 4
if keyboard.a:
player2.x = player2.x - 4
if keyboard.s:
player2.y = player2.y + 4
if keyboard.w:
player2.y = player2.y - 4
if player.colliderect(player2):
exit()
if player2.x > WIDTH:
player2.x = WIDTH
if player2.x < 0:
player2.x = 0
if player2.y < 0:
player2.y = 0
if player2.y > HEIGHT:
player2.y = HEIGHT

我只是尝试将玩家 2 引入我在 MU 编辑器中制作的 python 游戏中，我可以看到玩家 2 并移动他，但存在一些问题。 敌人不追玩家2，玩家2捡不到钱。我还想为 player2 添加一个 score2 变量，并在他与钱碰撞时存储分数。

Answer 1

要取钱，您必须在playyer2和money之间添加碰撞测试：

score2 = 0
def update():
global score, score2
# [...]
if money.colliderect(player2):
money.x = random.randint(0, WIDTH)
money.y = random.randint(0, HEIGHT)
score2 += 1

为了追逐player或player2你必须找到离敌人更近的玩家。比较从敌人到玩家的欧几里得距离的平方，并追逐更近的玩家：

def update():
dx1, dy1 = player.x - enemy.x, player.y - enemy.y
dx2, dy2 = player2.x - enemy.x, player2.y - enemy.y
dist1sq = dx1*dx1 + dy1*dy1
dist2sq = dx2*dx2 + dy2*dy2 
player_near = player if dist1sq < dist2sq else player2
if enemy.x < player_near.x:
enemy.x += 1
if enemy.x > player_near.x:
enemy.x -= 1
if enemy.y < player_near.y:
enemy.y += 1
if enemy.y > player_near.y:
enemy.y -= 1
if player.colliderect(enemy):
exit()
if player2.colliderect(enemy):
exit()
# [...]

功能update：

def update():
global score, score2
if keyboard.right:
player.x += 4
if keyboard.left:
player.x -= 4
if keyboard.down:
player.y += 4
if keyboard.up:
player.y -= 4
if player.x > WIDTH:
player.x = WIDTH
if player.x < 0:
player.x = 0
if player.y < 0:
player.y = 0
if player.y > HEIGHT:
player.y = HEIGHT
if keyboard.d:
player2.x += 4
if keyboard.a:
player2.x -= 4
if keyboard.s:
player2.y += 4
if keyboard.w:
player2.y -= 4
if player2.x > WIDTH:
player2.x = WIDTH
if player2.x < 0:
player2.x = 0
if player2.y < 0:
player2.y = 0
if player2.y > HEIGHT:
player2.y = HEIGHT
dx1, dy1 = player.x - enemy.x, player.y - enemy.y
dx2, dy2 = player2.x - enemy.x, player2.y - enemy.y
dist1sq = dx1*dx1 + dy1*dy1
dist2sq = dx2*dx2 + dy2*dy2 
player_near = player if dist1sq < dist2sq else player2
if enemy.x < player_near.x:
enemy.x += 1
if enemy.x > player_near.x:
enemy.x -= 1
if enemy.y < player_near.y:
enemy.y += 1
if enemy.y > player_near.y:
enemy.y -= 1
if player.colliderect(enemy):
exit()
if player2.colliderect(enemy):
exit()
if money.colliderect(player):
money.x = random.randint(0, WIDTH)
money.y = random.randint(0, HEIGHT)
score = score + 1
if money.colliderect(player2):
money.x = random.randint(0, WIDTH)
money.y = random.randint(0, HEIGHT)
score2 += 1