我如何使pygame中的对象旋转

如何解决我如何使pygame中的对象旋转

我正在制作一个游戏，之前使用图像和闪烁它们制作了它，但我现在正在尝试使用对象和精灵来重新制作它。我不确定如何让我的图像和矩形旋转，我也不确定如何创建一个在我的对象后面或不可见的矩形，因为我计划让两辆车相撞。 我以前使用 sin 和 cos 来计算方向，当我单击左右箭头时，图像会转动，但我不知道如何将其应用于对象类。 任何帮助将不胜感激谢谢。

这是我的代码

import pygame,random
#Let's import the Car Class
from Car import Car
pygame.init()


speed = 1

SCREENWIDTH=800
SCREENHEIGHT=600
 
size = (SCREENWIDTH,SCREENHEIGHT)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Car Racing")
 
#This will be a list that will contain all the sprites we intend to use in our game.
all_sprites_list = pygame.sprite.Group()
 

playerCar = Car(60,80,70)
playerCar.rect.x = 160
playerCar.rect.y = 100

 
# Add the car to the list of objects
all_sprites_list.add(playerCar)


#Allowing the user to close the window...
carryOn = True
clock=pygame.time.Clock()
 
while carryOn:
        for event in pygame.event.get():
            if event.type==pygame.QUIT:
                carryOn=False
            elif event.type==pygame.KEYDOWN:
                if event.key==pygame.K_x:
                     playerCar.moveRight(10)
 
        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT]:
            playerCar.moveLeft(5)
        if keys[pygame.K_RIGHT]:
            playerCar.moveRight(5)
        if keys[pygame.K_UP]:
            playerCar.moveUp(5)
        if keys[pygame.K_DOWN]:
            playerCar.moveDown(5)


        all_sprites_list.update()
 
        #Drawing on Screen
        screen.fill("white")
 
        #Now let's draw all the sprites in one go. (For Now we only have 1 sprite!)
        all_sprites_list.draw(screen)
 
        #Refresh Screen
        pygame.display.flip()
 
        #Number of frames per secong e.g. 60
        clock.tick(60)
 
pygame.quit()

###第二个文件###

import pygame
WHITE = (255,255,255)
 
class Car(pygame.sprite.Sprite):
    #This class represents a car. It derives from the "Sprite" class in Pygame.
 
    def __init__(self,width,height,speed):
        # Call the parent class (Sprite) constructor
        super().__init__()
        
        # Instead we Could load a proper picture of a car...
        self.image = pygame.image.load("car.png").convert_alpha()
        

        #Initialise attributes of the car.
        self.width=width
        self.height=height
        #self.speed = speed
 
        # Draw the car (a rectangle!)
        pygame.draw.rect(self.image,(0,0),[0,self.width,self.height])
 
        # Fetch the rectangle object that has the dimensions of the image.
        self.rect = self.image.get_rect()
 
    def moveRight(self,pixels):
        self.rect.x += pixels
 
    def moveLeft(self,pixels):
        self.rect.x -= pixels
 
    def moveUp(self,pixels):
        self.rect.y -= pixels
 
    def moveDown(self,pixels):
        self.rect.y += pixels
 
    def changeSpeed(self,speed):
        self.speed = speed

解决方法

我也不确定如何创建一个在我的对象后面或不可见的矩形。

如果您不绘制对象，则它是不可见的。不要混淆 pygame.Rect 对象和 pygame.draw.rect。但是，pygame.Rect 存储位置和大小。它始终是轴对齐的，不能表示旋转的矩形。

我怀疑您需要对象的矩形轮廓来进行碰撞检测。请参阅 How do I detect collision in pygame?、Collision between masks in PyGame 和 Pygame mask collision。

---

使用 pygame.transform.rotate 旋转图像。例如：

def blitRotateCenter(surf,image,center,angle):

    rotated_image = pygame.transform.rotate(image,angle)
    new_rect = rotated_image.get_rect(center = image.get_rect(center = center).center)

    surf.blit(rotated_image,new_rect)

另见How do I rotate an image around its center using PyGame?

---

如果您想旋转一个矩形，您必须使用具有统一颜色的透明度信息填充 pygame.Surface 对象并旋转表面。设置 SRCALPHA 以创建具有每像素 Alpha 格式的 Surface：

rect_surf = pygame.Surface((width,height),pygame.SRCALPHA)
rect_surf.fill(color)
blitRotateCenter(screen,rect_surf,(x,y),angle)

另见Getting rotated rect of rotated image in Pygame