Pygame - 移动矩形中的中心文本[重复]
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【中文标题】Pygame - 移动矩形中的中心文本[重复]【英文标题】:Pygame - center text in moving rect [duplicate] 【发布时间】:2021-09-19 17:55:51 【问题描述】:我正在 pygame 中制作一个数字游戏,并且有从屏幕顶部到底部的正方形,同时有一个数值,并且该数字显示在每个正方形上。我正在努力让文本以正方形为中心,当每个数字可以包含 1 - 4 位数字时,这会变得更加困难
class sqr:
def __init__(self):
self.colours = [(255,0,0), (0,255,0), (0,0,255)]
self.Xpositions = [0,125,245,365,485]
self.OnScreen = False
self.X = random.choice(self.Xpositions)
self.Y = 0
self.colour = random.choice(self.colours)
self.number = random.choice([20,40,80])
self.numberFont = pygame.font.Font("TitilliumWeb-Black.ttf", 48)
def drawSquare(self, colour, X, Y):
pygame.draw.rect(screen, colour, (X, Y, 120, 120))
def numberTextFunc(self, X, Y):
numberText = self.numberFont.render(f"self.number", True, (87, 63, 63))
screen.blit(numberText, (X , Y))
square = sqr()
gameRunning = True
while gameRunning:
background = screen.fill((0,100,140))
#draw lines for grid
for i in range(5):
pygame.draw.rect(screen, (0,0,0), (line[i], 0 , 5, 800))
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameRunning = False
#square
square.drawSquare(square.colour, square.X, square.Y)
square.numberTextFunc(square.X, square.Y)
square.OnScreen = True
square.Y += 1
if square.Y >= 680:
square.Y = 680
pygame.display.update()
【问题讨论】:
【参考方案1】:使用pygame.Surface.get_rect
获取文本矩形。 pygame.Surface.get_rect.get_rect()
返回一个与 Surface 对象大小相同的矩形,该矩形始终从 (0, 0) 开始。将文本矩形的中心设置为正方形的中心。使用文本reectnagle 到blit
文本。 blit
的第二个参数是一个元组 (x, y) 或一个矩形。对于矩形,只考虑矩形的左上角。因此,您可以将文本矩形直接传递给blit
:
class sqr:
# [...]
def numberTextFunc(self, X, Y):
numberText = self.numberFont.render(f"self.number", True, (87, 63, 63))
rect = pygame.Rect(X, Y, 120, 120)
textRect = numberText.get_rect(center = rect.center)
screen.blit(numberText, textRect)
您可以简化代码。 X
和 Y
是对象的属性。因此无需将坐标传递给方法:
class sqr:
def __init__(self):
self.colours = [(255,0,0), (0,255,0), (0,0,255)]
self.Xpositions = [0,125,245,365,485]
self.OnScreen = False
self.X = random.choice(self.Xpositions)
self.Y = 0
self.colour = random.choice(self.colours)
self.number = random.choice([20,40,80])
self.numberFont = pygame.font.Font("TitilliumWeb-Black.ttf", 48)
def drawSquare(self, colour):
pygame.draw.rect(screen, colour, (self.X, self.Y, 120, 120))
def numberTextFunc(self):
numberText = self.numberFont.render(f"self.number", True, (87, 63, 63))
rect = pygame.Rect(self.X, self.Y, 120, 120)
textRect = numberText.get_rect(center = rect.center)
screen.blit(numberText, textRect)
gameRunning = True
while gameRunning:
background = screen.fill((0,100,140))
#draw lines for grid
for i in range(5):
pygame.draw.rect(screen, (0,0,0), (line[i], 0 , 5, 800))
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameRunning = False
#square
square.drawSquare(square.colour)
square.numberTextFunc()
square.OnScreen = True
square.Y += 1
if square.Y >= 680:
square.Y = 680
pygame.display.update()
【讨论】:
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