如何在pygame中的图片背景上绘制线条

Question

我想绘制pygame中的曲面（任意位置和长度），它本身是一个从磁盘上的文件加载的图像。

任何人都可以指向我的一些示例代码，这样做吗？

Answer 1

这应该做你问什么：

# load the image 
image = pygame.image.load("some_image.png") 

# draw a yellow line on the image 
pygame.draw.line(image, (255, 255, 0), (0, 0), (100, 100)) 

通常你不画原始图像的，因为你必须重新加载图像来获得原始回（或创建在它开始绘制之前它的一个副本）。也许你真正需要的是更多这样的东西：

# initialize pygame and screen 
import pygame 
pygame.init() 
screen = pygame.display.set_mode((720, 576)) 

# Draw the image to the screen 
screen.blit(image, (0, 0)) 

# Draw a line on top of the image on the screen 
pygame.draw.line(screen, (255, 255, 255), (0, 0), (50, 50)) 

Answer 2

帮助的模块pygame.draw在pygame的：

名称 pygame.draw - 用于绘制形状

FILE d pygame的模块：\ Program Files文件\ python25 \ LIB \站点包\ pygame的\ draw.pyd

功能 aaline（...） pygame.draw.aaline（表面，颜色，startpos，endpos，混合= 1）：返回的Rect 绘制细平滑处理线条

aalines(...) 
    pygame.draw.aalines(Surface, color, closed, pointlist, blend=1): return Rect 

arc(...) 
    pygame.draw.arc(Surface, color, Rect, start_angle, stop_angle, width=1): return Rect 
    draw a partial section of an ellipse 

circle(...) 
    pygame.draw.circle(Surface, color, pos, radius, width=0): return Rect 
    draw a circle around a point 

ellipse(...) 
    pygame.draw.ellipse(Surface, color, Rect, width=0): return Rect 
    draw a round shape inside a rectangle 

line(...) 
    pygame.draw.line(Surface, color, start_pos, end_pos, width=1): return Rect 
    draw a straight line segment 

lines(...) 
    pygame.draw.lines(Surface, color, closed, pointlist, width=1): return Rect 
    draw multiple contiguous line segments 

polygon(...) 
    pygame.draw.polygon(Surface, color, pointlist, width=0): return Rect 
    draw a shape with any number of sides 

rect(...) 
    pygame.draw.rect(Surface, color, Rect, width=0): return Rect 
    draw a rectangle shape