问题
So I need to mirror an image. The top right side of the image should be flipped over to the bottom left side. I created a function that flips the top left side of an image to the bottom right, but I just can't seem to figure out how to do it the other way. Here's the code:
def mirrorPicture(picture):
height = getHeight(canvas)
width = height
# to make mirroring easier, let us make it a square with odd number
# of rows and columns
if (height % 2 == 0):
height = width = height -1 # let us make the height and width odd
maxHeight = height - 1
maxWidth = width - 1
for y in range(0, maxWidth):
for x in range(0, maxHeight - y):
sourcePixel = getPixel(canvas, x, y)
targetPixel = getPixel(canvas, maxWidth - y, maxWidth - x)
color = getColor(sourcePixel)
setColor(targetPixel, color)
return canvas
btw, i'm using an IDE called "JES".
回答1:
If by "mirroring", you meant "flip diagonally", this should work :
def mirrorPicture(picture):
height = getHeight(picture)
width = getWidth(picture)
newPicture = makeEmptyPicture(height, width)
for x in range(0, width):
for y in range(0, height):
sourcePixel = getPixel(picture, x, y)
targetPixel = getPixel(newPicture, y, x)
# ^^^^ (simply invert x and y)
color = getColor(sourcePixel)
setColor(targetPixel, color)
return newPicture
Giving :
..................
...............................................Related answer about mirroring diagonally here.
来源:https://stackoverflow.com/questions/17099584/mirroring-an-image-by-its-diagonal-in-jython