如果您只想绘制矩形的轮廓,可以将整数作为第四个参数(width
)传递给pygame.draw.rect
:
pygame.draw.rect(screen, (0, 100, 255), (50, 50, 162, 100), 3) # width = 3
gfxdraw
模块使用for
循环绘制多个轮廓线:def draw_rect_outline(surface, rect, color, width=1):
x, y, w, h = rect
width = max(width, 1) # Draw at least one rect.
width = min(min(width, w//2), h//2) # Don't overdraw.
# This draws several smaller outlines inside the first outline. Invert
# the direction if it should grow outwards.
for i in range(width):
pygame.gfxdraw.rectangle(screen, (x+i, y+i, w-i*2, h-i*2), color)
draw_rect_outline(screen, (250, 50, 162, 100), (0, 100, 255, 155), 9)
这也允许您传递带有 alpha 通道的颜色,以使轮廓透明。
还可以创建透明表面并在其上绘制矩形(这里也可以传递透明颜色):
surf = pygame.Surface((162, 100), pygame.SRCALPHA)
pygame.draw.rect(surf, (0, 100, 255, 155), (0, 0, 162, 100), 21)
fill
。surf.fill((0, 100, 255, 155))
pygame.draw.rect
。问题在于,对于较大的宽度,它看起来相当丑陋,因为在角落处会有间隙。您也可以创建自己的矩形轮廓函数并绘制四条线。 - skrx