如何在PyGame中添加用于鼠标拖动的橡皮筋？
How do I add a rubber band for mouse dragging in PyGame?
我将第二个代码与第一个代码分开，我想实现与第二个代码相同的功能，即用鼠标画一条线我将第二个代码与第一个代码分开，我想实现相同的功能第二个功能是用鼠标画线
SCREEN_WIDTH = 1500
SCREEN_HEIGHT = 750
background = pygame.image.load(r'C:\Users\ga-sa\Downloads\honeycomb.png')
background = pygame.transform.scale(BACKGROUND, (SCREEN_WIDTH, SCREEN_HEIGHT))
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsXOR.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsNOT.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsAND.png")
images = [img1, img2, img3, img4]
current_image = -1
img_rects = [images[i].get_rect(topleft=(20 + 40 * i, 20)) for i in range(len(images))]
img_angles = [0 for _ in range(len(images))]
LeftButton = 0
while 1:
for e in pygame.event.get():
if e.type == QUIT:
pygame.quit()
exit(0)
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
if e.type == MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
keys = pygame.key.get_pressed()
if keys[pygame.K_RIGHT]:
img_angles[current_image] -= 1
if keys[pygame.K_LEFT]:
img_angles[current_image] += 1
screen.blit(background, (0,0))
for i in range(len(images)):
rotated_image = pygame.transform.rotate(images[i], img_angles[i])
rotated_rect = rotated_image.get_rect(center=img_rects[i].center)
screen.blit(rotated_image, rotated_rect)
pygame.display.flip()
如何在这段代码中添加一行代码？
def main()
pygame.init()
pygame.display.set_caption("Mouse Draw")
surface = pygame.display.set_mode((800, 600))
clock = pygame.time.Clock()
rect = surface.get_rect()
fps = 60
line_surface = pygame.Surface(rect.size, pygame.SRCALPHA)
line_surface.fill((0, 0, 0, 0))
mouse_position = None
display_line = None
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.MOUSEMOTION:
if mouse_position:
display_line = mouse_position, event.pos
elif event.type == pygame.MOUSEBUTTONDOWN:
if event.button == 1:
if mouse_position:
pygame.draw.line(line_surface, pygame.Color("red"), mouse_position, event.pos)
mouse_position = None
display_line = None
else:
mouse_position = event.pos
surface.fill(pygame.Color('black'))
surface.blit(line_surface, (0, 0))
if display_line:
pygame.draw.line(surface, pygame.Color('lawngreen'), *display_line)
pygame.display.update()
clock.tick(fps)
main ()
我想将 def main 放在第一个代码中，但我并不总是看到黑屏或出现错误，如果有人能帮助我，我将不胜感激。
事实上我想加入这两个代码，但我不知道如何调整以适应第一个
如果不想点点画线，第一次点保存起始位置，第二次点点结束线。这些行必须存储到列表中。添加一个留置权列表和一个变量 line_start 并通过 None:
初始化它
lines = []
line_start = None
第一次点击开始，第二次点击结束 (MOUSEBUTTONDOWN)。将完成的行添加到行列表中：
if e.type == pygame.MOUSEBUTTONDOWN:
# [...]
if line_start:
lines.append((line_start, e.pos))
line_start = None
else:
line_start = e.pos
循环绘制线条。如果一条线开始短打未完成从开始位置到当前鼠标位置绘制一条线：
for line in lines:
pygame.draw.line(screen, pygame.Color('lawngreen'), *line)
if line_start:
pygame.draw.line(screen, pygame.Color('lawngreen'), line_start, pygame.mouse.get_pos())
最小示例：
import pygame
pygame.init()
SCREEN_WIDTH = 1500
SCREEN_HEIGHT = 750
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
clock = pygame.time.Clock()
background = pygame.image.load(r'C:\Users\ga-sa\Downloads\honeycomb.png')
background = pygame.transform.scale(BACKGROUND, (SCREEN_WIDTH, SCREEN_HEIGHT))
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsXOR.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsNOT.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsAND.png")
images = [img1, img2, img3, img4]
current_image = -1
img_rects = [images[i].get_rect(topleft=(20 + 80 * i, 20)) for i in range(len(images))]
img_angles = [0 for _ in range(len(images))]
lines = []
line_start = None
LeftButton = 0
while 1:
clock.tick(60)
for e in pygame.event.get():
if e.type == pygame.QUIT:
pygame.quit()
exit(0)
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
if line_start:
lines.append((line_start, e.pos))
line_start = None
else:
line_start = e.pos
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
keys = pygame.key.get_pressed()
if 0 <= current_image < len(img_angles):
if keys[pygame.K_RIGHT]:
img_angles[current_image] -= 1
if keys[pygame.K_LEFT]:
img_angles[current_image] += 1
screen.blit(background,(0,0))
for line in lines:
pygame.draw.line(screen, pygame.Color('lawngreen'), *line)
if line_start:
pygame.draw.line(screen, pygame.Color('lawngreen'), line_start, pygame.mouse.get_pos())
for i in range(len(images)):
rotated_image = pygame.transform.rotate(images[i], img_angles[i])
rotated_rect = rotated_image.get_rect(center = img_rects[i].center)
screen.blit(rotated_image, rotated_rect)
pygame.display.flip()
如果要在拖动图标的同时绘制橡皮线，必须保存线条的起点。添加一个变量line_start并通过`None:
初始化
line_start = None
设置鼠标按下时的起始位置(MOUSEBUTTONDOWN):
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
line_start = e.pos
设置鼠标松开时line_start = None(MOUSEBUTTONUP):
if e.type == pygame.MOUSEBUTTONUP:
line_start = None
如果设置了line_start，从当前鼠标位置开始画一条线：
if line_start:
pygame.draw.line(screen, pygame.Color('lawngreen'), line_start, pygame.mouse.get_pos())
最小示例：
import pygame
pygame.init()
SCREEN_WIDTH = 1500
SCREEN_HEIGHT = 750
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
clock = pygame.time.Clock()
background = pygame.image.load(r'C:\Users\ga-sa\Downloads\honeycomb.png')
background = pygame.transform.scale(BACKGROUND, (SCREEN_WIDTH, SCREEN_HEIGHT))
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsXOR.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsNOT.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsAND.png")
images = [img1, img2, img3, img4]
current_image = -1
img_rects = [images[i].get_rect(topleft=(20 + 80 * i, 20)) for i in range(len(images))]
img_angles = [0 for _ in range(len(images))]
line_start = None
LeftButton = 0
while 1:
clock.tick(60)
for e in pygame.event.get():
if e.type == pygame.QUIT:
pygame.quit()
exit(0)
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
line_start = e.pos
if e.type == pygame.MOUSEBUTTONUP:
line_start = None
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
keys = pygame.key.get_pressed()
if 0 <= current_image < len(img_angles):
if keys[pygame.K_RIGHT]:
img_angles[current_image] -= 1
if keys[pygame.K_LEFT]:
img_angles[current_image] += 1
screen.blit(background,(0,0))
if line_start:
pygame.draw.line(screen, pygame.Color('lawngreen'), line_start, pygame.mouse.get_pos())
for i in range(len(images)):
rotated_image = pygame.transform.rotate(images[i], img_angles[i])
rotated_rect = rotated_image.get_rect(center = img_rects[i].center)
screen.blit(rotated_image, rotated_rect)
pygame.display.flip()
如果你想沿着拖动图标的方式绘制线条，你需要一个线条列表。每行是一个点列表：
lines = []
按下鼠标时开始一个新列表(MOUSEMOTION):
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
lines.append([e.pos]) # <---
鼠标移动时在行列表的最后一行添加一个点(MOUSEMOTION):
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
lines[-1].append(e.pos) # <---
循环画线，不唱 pygame.draw.lines:
for line in lines:
if len(line) > 1:
pygame.draw.lines(screen, pygame.Color('lawngreen'), False, line)
如果你想要直线，你必须在移动鼠标时用新的鼠标位置替换直线的第二个点：
while 1:
clock.tick(60)
for e in pygame.event.get():
# [...]
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
# lines[-1].append(e.pos)
if len(lines[-1]) < 2:
lines[-1].append(e.pos)
else:
lines[-1][1] = e.pos
最小示例：
您可以通过更改straight_lines的值在两种实现之间切换。
import pygame
pygame.init()
SCREEN_WIDTH = 1500
SCREEN_HEIGHT = 750
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
clock = pygame.time.Clock()
background = pygame.image.load(r'C:\Users\ga-sa\Downloads\honeycomb.png')
background = pygame.transform.scale(BACKGROUND, (SCREEN_WIDTH, SCREEN_HEIGHT))
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsXOR.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsNOT.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsAND.png")
images = [img1, img2, img3, img4]
current_image = -1
img_rects = [images[i].get_rect(topleft=(20 + 80 * i, 20)) for i in range(len(images))]
img_angles = [0 for _ in range(len(images))]
lines = []
# straight_lines = False
straight_lines = True
LeftButton = 0
while 1:
clock.tick(60)
for e in pygame.event.get():
if e.type == pygame.QUIT:
pygame.quit()
exit(0)
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
lines.append([e.pos])
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
if len(lines[-1]) < 2 or not straight_lines:
lines[-1].append(e.pos)
else:
lines[-1][1] = e.pos
keys = pygame.key.get_pressed()
if 0 <= current_image < len(img_angles):
if keys[pygame.K_RIGHT]:
img_angles[current_image] -= 1
if keys[pygame.K_LEFT]:
img_angles[current_image] += 1
screen.blit(background,(0,0))
for line in lines:
if len(line) > 1:
pygame.draw.lines(screen, pygame.Color('lawngreen'), False, line)
for i in range(len(images)):
rotated_image = pygame.transform.rotate(images[i], img_angles[i])
rotated_rect = rotated_image.get_rect(center = img_rects[i].center)
screen.blit(rotated_image, rotated_rect)
pygame.display.flip()
我将第二个代码与第一个代码分开，我想实现与第二个代码相同的功能，即用鼠标画一条线我将第二个代码与第一个代码分开，我想实现相同的功能第二个功能是用鼠标画线
SCREEN_WIDTH = 1500
SCREEN_HEIGHT = 750
background = pygame.image.load(r'C:\Users\ga-sa\Downloads\honeycomb.png')
background = pygame.transform.scale(BACKGROUND, (SCREEN_WIDTH, SCREEN_HEIGHT))
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsXOR.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsNOT.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsAND.png")
images = [img1, img2, img3, img4]
current_image = -1
img_rects = [images[i].get_rect(topleft=(20 + 40 * i, 20)) for i in range(len(images))]
img_angles = [0 for _ in range(len(images))]
LeftButton = 0
while 1:
for e in pygame.event.get():
if e.type == QUIT:
pygame.quit()
exit(0)
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
if e.type == MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
keys = pygame.key.get_pressed()
if keys[pygame.K_RIGHT]:
img_angles[current_image] -= 1
if keys[pygame.K_LEFT]:
img_angles[current_image] += 1
screen.blit(background, (0,0))
for i in range(len(images)):
rotated_image = pygame.transform.rotate(images[i], img_angles[i])
rotated_rect = rotated_image.get_rect(center=img_rects[i].center)
screen.blit(rotated_image, rotated_rect)
pygame.display.flip()
如何在这段代码中添加一行代码？
def main()
pygame.init()
pygame.display.set_caption("Mouse Draw")
surface = pygame.display.set_mode((800, 600))
clock = pygame.time.Clock()
rect = surface.get_rect()
fps = 60
line_surface = pygame.Surface(rect.size, pygame.SRCALPHA)
line_surface.fill((0, 0, 0, 0))
mouse_position = None
display_line = None
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.MOUSEMOTION:
if mouse_position:
display_line = mouse_position, event.pos
elif event.type == pygame.MOUSEBUTTONDOWN:
if event.button == 1:
if mouse_position:
pygame.draw.line(line_surface, pygame.Color("red"), mouse_position, event.pos)
mouse_position = None
display_line = None
else:
mouse_position = event.pos
surface.fill(pygame.Color('black'))
surface.blit(line_surface, (0, 0))
if display_line:
pygame.draw.line(surface, pygame.Color('lawngreen'), *display_line)
pygame.display.update()
clock.tick(fps)
main ()
我想将 def main 放在第一个代码中，但我并不总是看到黑屏或出现错误，如果有人能帮助我，我将不胜感激。 事实上我想加入这两个代码，但我不知道如何调整以适应第一个
如果不想点点画线，第一次点保存起始位置，第二次点点结束线。这些行必须存储到列表中。添加一个留置权列表和一个变量 line_start 并通过 None:
lines = []
line_start = None
第一次点击开始，第二次点击结束 (MOUSEBUTTONDOWN)。将完成的行添加到行列表中：
if e.type == pygame.MOUSEBUTTONDOWN:
# [...]
if line_start:
lines.append((line_start, e.pos))
line_start = None
else:
line_start = e.pos
循环绘制线条。如果一条线开始短打未完成从开始位置到当前鼠标位置绘制一条线：
for line in lines:
pygame.draw.line(screen, pygame.Color('lawngreen'), *line)
if line_start:
pygame.draw.line(screen, pygame.Color('lawngreen'), line_start, pygame.mouse.get_pos())
最小示例：
import pygame
pygame.init()
SCREEN_WIDTH = 1500
SCREEN_HEIGHT = 750
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
clock = pygame.time.Clock()
background = pygame.image.load(r'C:\Users\ga-sa\Downloads\honeycomb.png')
background = pygame.transform.scale(BACKGROUND, (SCREEN_WIDTH, SCREEN_HEIGHT))
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsXOR.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsNOT.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsAND.png")
images = [img1, img2, img3, img4]
current_image = -1
img_rects = [images[i].get_rect(topleft=(20 + 80 * i, 20)) for i in range(len(images))]
img_angles = [0 for _ in range(len(images))]
lines = []
line_start = None
LeftButton = 0
while 1:
clock.tick(60)
for e in pygame.event.get():
if e.type == pygame.QUIT:
pygame.quit()
exit(0)
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
if line_start:
lines.append((line_start, e.pos))
line_start = None
else:
line_start = e.pos
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
keys = pygame.key.get_pressed()
if 0 <= current_image < len(img_angles):
if keys[pygame.K_RIGHT]:
img_angles[current_image] -= 1
if keys[pygame.K_LEFT]:
img_angles[current_image] += 1
screen.blit(background,(0,0))
for line in lines:
pygame.draw.line(screen, pygame.Color('lawngreen'), *line)
if line_start:
pygame.draw.line(screen, pygame.Color('lawngreen'), line_start, pygame.mouse.get_pos())
for i in range(len(images)):
rotated_image = pygame.transform.rotate(images[i], img_angles[i])
rotated_rect = rotated_image.get_rect(center = img_rects[i].center)
screen.blit(rotated_image, rotated_rect)
pygame.display.flip()
如果要在拖动图标的同时绘制橡皮线，必须保存线条的起点。添加一个变量line_start并通过`None:
line_start = None
设置鼠标按下时的起始位置(MOUSEBUTTONDOWN):
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
line_start = e.pos
设置鼠标松开时line_start = None(MOUSEBUTTONUP):
if e.type == pygame.MOUSEBUTTONUP:
line_start = None
如果设置了line_start，从当前鼠标位置开始画一条线：
if line_start:
pygame.draw.line(screen, pygame.Color('lawngreen'), line_start, pygame.mouse.get_pos())
最小示例：
import pygame
pygame.init()
SCREEN_WIDTH = 1500
SCREEN_HEIGHT = 750
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
clock = pygame.time.Clock()
background = pygame.image.load(r'C:\Users\ga-sa\Downloads\honeycomb.png')
background = pygame.transform.scale(BACKGROUND, (SCREEN_WIDTH, SCREEN_HEIGHT))
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsXOR.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsNOT.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsAND.png")
images = [img1, img2, img3, img4]
current_image = -1
img_rects = [images[i].get_rect(topleft=(20 + 80 * i, 20)) for i in range(len(images))]
img_angles = [0 for _ in range(len(images))]
line_start = None
LeftButton = 0
while 1:
clock.tick(60)
for e in pygame.event.get():
if e.type == pygame.QUIT:
pygame.quit()
exit(0)
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
line_start = e.pos
if e.type == pygame.MOUSEBUTTONUP:
line_start = None
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
keys = pygame.key.get_pressed()
if 0 <= current_image < len(img_angles):
if keys[pygame.K_RIGHT]:
img_angles[current_image] -= 1
if keys[pygame.K_LEFT]:
img_angles[current_image] += 1
screen.blit(background,(0,0))
if line_start:
pygame.draw.line(screen, pygame.Color('lawngreen'), line_start, pygame.mouse.get_pos())
for i in range(len(images)):
rotated_image = pygame.transform.rotate(images[i], img_angles[i])
rotated_rect = rotated_image.get_rect(center = img_rects[i].center)
screen.blit(rotated_image, rotated_rect)
pygame.display.flip()
如果你想沿着拖动图标的方式绘制线条，你需要一个线条列表。每行是一个点列表：
lines = []
按下鼠标时开始一个新列表(MOUSEMOTION):
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
lines.append([e.pos]) # <---
鼠标移动时在行列表的最后一行添加一个点(MOUSEMOTION):
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
lines[-1].append(e.pos) # <---
循环画线，不唱 pygame.draw.lines:
for line in lines:
if len(line) > 1:
pygame.draw.lines(screen, pygame.Color('lawngreen'), False, line)
如果你想要直线，你必须在移动鼠标时用新的鼠标位置替换直线的第二个点：
while 1:
clock.tick(60)
for e in pygame.event.get():
# [...]
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
# lines[-1].append(e.pos)
if len(lines[-1]) < 2:
lines[-1].append(e.pos)
else:
lines[-1][1] = e.pos
最小示例：
您可以通过更改straight_lines的值在两种实现之间切换。
import pygame
pygame.init()
SCREEN_WIDTH = 1500
SCREEN_HEIGHT = 750
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
clock = pygame.time.Clock()
background = pygame.image.load(r'C:\Users\ga-sa\Downloads\honeycomb.png')
background = pygame.transform.scale(BACKGROUND, (SCREEN_WIDTH, SCREEN_HEIGHT))
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsXOR.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsNOT.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\AssetsAND.png")
images = [img1, img2, img3, img4]
current_image = -1
img_rects = [images[i].get_rect(topleft=(20 + 80 * i, 20)) for i in range(len(images))]
img_angles = [0 for _ in range(len(images))]
lines = []
# straight_lines = False
straight_lines = True
LeftButton = 0
while 1:
clock.tick(60)
for e in pygame.event.get():
if e.type == pygame.QUIT:
pygame.quit()
exit(0)
if e.type == pygame.MOUSEBUTTONDOWN:
mouse_rect = pygame.Rect(e.pos, (1, 1))
current_image = mouse_rect.collidelist(img_rects)
lines.append([e.pos])
if e.type == pygame.MOUSEMOTION:
if e.buttons[LeftButton]:
rel = e.rel
if 0 <= current_image < len(images):
img_rects[current_image].x += rel[0]
img_rects[current_image].y += rel[1]
if len(lines[-1]) < 2 or not straight_lines:
lines[-1].append(e.pos)
else:
lines[-1][1] = e.pos
keys = pygame.key.get_pressed()
if 0 <= current_image < len(img_angles):
if keys[pygame.K_RIGHT]:
img_angles[current_image] -= 1
if keys[pygame.K_LEFT]:
img_angles[current_image] += 1
screen.blit(background,(0,0))
for line in lines:
if len(line) > 1:
pygame.draw.lines(screen, pygame.Color('lawngreen'), False, line)
for i in range(len(images)):
rotated_image = pygame.transform.rotate(images[i], img_angles[i])
rotated_rect = rotated_image.get_rect(center = img_rects[i].center)
screen.blit(rotated_image, rotated_rect)
pygame.display.flip()