如何在 pygame 中使用 Keys 旋轉我的圖像？

Question

我試圖讓圖像（透明圖像）在我按下的鍵上旋轉。 IE 我想上下旋轉我的玩家的頭部（他從他的頭部射擊），但我真的沒有關於如何編碼的體面指南。 如果有人可以幫助我，將不勝感激。 我還希望當我按住按鍵時頭部能夠平滑地上下旋轉（瞄准）。 代碼如下：

import pygame

pygame.init()

white = (255,255,255)
BLACK = (0,0,0)
red = (255,0,0)


gameDisplay = pygame.display.set_mode((640,360))

background = pygame.image.load('background.jpg').convert()

player = pygame.image.load('BigShagHoofdz.png') #this must be rotateable

pygame.display.set_caption('Leslie is Lauw')
clock = pygame.time.Clock()


gameDisplay.blit(background, [0,0])
gameDisplay.blit(player, [-1,223])
pygame.display.update()

FPS = 60

direction = "Down"

def head():
    if direction == "Down":
        playerhead = player
    if direction == "Up":
        playerhead = pygame.transform.rotate(player, 60)



def gameLoop():
    global direction
    gameExit = False


    while gameExit==False: 
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
            gameExit = True

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
            gameExit = True

            if event.key == pygame.KEYDOWN:
                if event.key == pygame.K_UP:
                direction = "Up"
                elif event.key == pygame.K_DOWN:
                direction = "Down"

clock.tick(60)
pygame.quit()
quit()

它應該只在我按下向上或向下鍵時向上或向下旋轉，也許在按住或向上時讓它變得平滑。

Answer 1

如果只想在普通圖像和旋轉圖像之間切換，則可以在while循環之前創建旋轉版本，然后只要按下某個鍵就可以切換圖像。

import pygame

pygame.init()

gameDisplay = pygame.display.set_mode((640, 360))
clock = pygame.time.Clock()
# The normal image/pygame.Surface.
player_image = pygame.Surface((30, 50), pygame.SRCALPHA)
player_image.fill((0, 100, 200))
pygame.draw.circle(player_image, (0, 50, 100), (15, 20), 12)
# The rotated image.
player_rotated = pygame.transform.rotate(player_image, 60)

FPS = 60

def gameLoop():
    player = player_image
    player_pos = [100, 223]
    gameExit = False

    while gameExit == False: 
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                gameExit = True
            elif event.type == pygame.KEYDOWN:
                # Assign the current image to the `player` variable.
                if event.key == pygame.K_UP:
                    player = player_image
                elif event.key == pygame.K_DOWN:
                    player = player_rotated

        gameDisplay.fill((30, 30, 30))
        gameDisplay.blit(player, player_pos)

        pygame.display.flip()
        clock.tick(60)

gameLoop()
pygame.quit()

Answer 2

所以我會使用這段代碼，因為你的代碼實際上不會旋轉它，因為你讓它在循環外旋轉（只發生一次）。

我希望您嘗試使用它：

import pygame, sys

pygame.init()

clock = pygame.time.Clock()
screen = pygame.display.set_mode((width, height))

def rotateItem(image, angle, x,y):
    image = pygame.transform.rotate(image, angle)
    imageRect = image.get_rect(center=(x,y))
    screen.blit(image, imageRect)

angle = 0
while True:
    screen.fill((r, g, b)) # Red, Green, Blue
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                angle = -angle # I can't test right now so if this doesn't work switch -angle with abs(angle)
                rotateItem(playerImage, angle, playerXPosition,playerYPosition)
            if event.key == pygame.K_DOWN:
                angle = abs(angle) # Same with this but change it to -angle
                rotateItem(playerImage, angle, playerXPosition,playerYPosition)

    pygame.display.update()
    clock.tick(60) # Framerate
                

還

# add this if you want it to rotate by one each time it calls the function.
angle += 1

它應該使表面/矩形以其設置的角度旋轉。 我希望這有助於並享受使用 pygame 編碼的樂趣！

來源： ClearCode - 旋轉的東西