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使用JES(python)在图像上绘制白色网格线_Python_Line_Draw_Jython_Jes - Fatal编程技术网

使用JES(python)在图像上绘制白色网格线

使用JES(python)在图像上绘制白色网格线,python,line,draw,jython,jes,Python,Line,Draw,Jython,Jes,如何使用JES编写一个程序,在图像上绘制水平方向的“白色”网格线 网格线由10个像素分隔,垂直网格线被分隔 20像素?是的,令人惊讶的是,addLine(picture,startX,startY,endX,endY)只能画黑线 让我们用手来做吧。下面是一个非常基本的实现: def drawGrid(picture, color): w = getWidth(picture) h = getHeight(picture) printNow(str(w) + " x " + str

如何使用JES编写一个程序,在图像上绘制水平方向的“白色”网格线 网格线由10个像素分隔,垂直网格线被分隔
20像素?

是的,令人惊讶的是,
addLine(picture,startX,startY,endX,endY)
只能画黑线

让我们用手来做吧。下面是一个非常基本的实现:

def drawGrid(picture, color):

  w = getWidth(picture)
  h = getHeight(picture)

  printNow(str(w) + " x " + str(h))

  w_offset = 20  # Vertical lines offset
  h_offset = 10  # Horizontal lines offset

  # Starting at 1 to avoid drawing on the border
  for y in range(1, h):     
    for x in range(1, w):
      # Here is the trick: we draw only 
      # every offset (% = modulus operator)
      if (x % w_offset == 0) or (y % h_offset == 0):
        px = getPixel(picture, x, y)
        setColor(px, color)


file = pickAFile()
picture = makePicture(file) 
# Change the color here
color = makeColor(255, 255, 255) # This is white
drawGrid(picture, color)
show(picture)
注意:根据给定的脚本,使用函数drawLine()也可以更有效地实现这一点。


输出: