我正在用python做一个游戏,我有一个错误
应为整数参数,得到浮点值
,我不明白为什么。给我错误的一行是:
pygame.draw.circle(screen, (128, 128, 128),
(self.location[0]-1, self.location[1]-1), self.size+1)
class Player(object):
def __init__(self, name, colour):
self.name = name
self.colour = colour
self.level = 1
self.feed = 0
self.size = 2
self.speed = 6
self.location = (SCREEN_SIZE[0]/2, SCREEN_SIZE[1]/2)
self.destination = self.location
self.stopDis = 5 #Stopping distance
def render(self, screen):
pygame.draw.circle(screen, (128, 128, 128),
(self.location[0]-1, self.location[1]-1), self.size+1) #Error here
pygame.draw.circle(screen, self.colour, self.location, self.size) #Draw circle
pygame的第三个参数。画圆必须是整数坐标(元组
(x,y)
),但除法(/
)的结果是浮点值。
使用int
或round
来投射self。位置
从浮点值到整数值:
pygame.draw.circle(screen, (128, 128, 128),
(int(self.location[0]-1), int(self.location[1]-1)), self.size+1)
或者做积分除法(//
),而不是浮点除法(/
),当你计算self.location
:
self.location = (SCREEN_SIZE[0] // 2, SCREEN_SIZE[1] // 2)
另请参阅数字类型。