[英]Rotate image by a Button in PyGame
我有這段代碼,我用它加載圖像 rotate.png 並順時針旋轉。 我想通過插入兩個按鈕來修改它,一個用於開始,一個用於停止。 如果沒有按下停止按鈕,則在按下“啟動”按鈕時車輪必須啟動並減速直至停止。 有什么想法?
import pygame, os
perc=os.getcwd()
percfile=perc+"\\ruota.png"
pygame.init()
screen = pygame.display.set_mode((1000, 1000))
clock = pygame.time.Clock()
def blitRotate(surf, image, pos, originPos, angle):
# offset from pivot to center
image_rect = image.get_rect(topleft = (pos[0] - originPos[0], pos[1]-originPos[1]))
offset_center_to_pivot = pygame.math.Vector2(pos) - image_rect.center
# roatated offset from pivot to center
rotated_offset = offset_center_to_pivot.rotate(-angle)
# roatetd image center
rotated_image_center = (pos[0] - rotated_offset.x, pos[1] - rotated_offset.y)
# get a rotated image
rotated_image = pygame.transform.rotate(image, angle)
rotated_image_rect = rotated_image.get_rect(center = rotated_image_center)
# rotate and blit the image
surf.blit(rotated_image, rotated_image_rect)
# draw rectangle around the image
# pygame.draw.rect(surf, (255, 0, 0), (*rotated_image_rect.topleft, *rotated_image.get_size()),2)
def blitRotate2(surf, image, topleft, angle):
rotated_image = pygame.transform.rotate(image, angle)
new_rect = rotated_image.get_rect(center = image.get_rect(topleft = topleft).center)
surf.blit(rotated_image, new_rect.topleft)
pygame.draw.rect(surf, (255, 0, 0), new_rect, 2)
try:
image = pygame.image.load(percfile)
except:
text = pygame.font.SysFont('Times New Roman', 50).render('image', False, (255, 255, 0))
image = pygame.Surface((text.get_width()+1, text.get_height()+1))
#pygame.draw.rect(image, (0, 0, 255), (1, 1, *text.get_size()))
image.blit(text, (1, 1))
w, h = image.get_size()
angle = 0
done = False
while not done:
clock.tick(60)
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
pos = (screen.get_width()/2, screen.get_height()/2)
screen.fill(0)
blitRotate(screen, image, pos, (w/2, h/2), angle)
#blitRotate2(screen, image, pos, angle)
angle += 1
pygame.draw.line(screen, (0, 255, 0), (pos[0]-20, pos[1]), (pos[0]+20, pos[1]), 3)
pygame.draw.line(screen, (0, 255, 0), (pos[0], pos[1]-20), (pos[0], pos[1]+20), 3)
pygame.draw.circle(screen, (0, 255, 0), pos, 7, 0)
pygame.display.flip()
pygame.quit()
exit()
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