【发布时间】:2014-06-17 05:32:54
【问题描述】:
如何使用 JES 编写程序在水平方向的图像上绘制“白色”网格线 网格线相隔 10 个像素,垂直网格线相隔 20 像素?
【问题讨论】:
标签: python line draw jython jes
如何使用 JES 编写程序在水平方向的图像上绘制“白色”网格线 网格线相隔 10 个像素,垂直网格线相隔 20 像素?
【问题讨论】:
标签: python line draw jython jes
是的,令人惊讶的是,addLine(picture, startX, startY, endX, endY) 只能画黑线!?
所以让我们自己动手吧。这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:这也可以使用函数 drawLine() 更有效地实现,来自给定的脚本here。
输出:
.......................
【讨论】: