如何在JES中创建拼贴

Question

我有一个项目，创建一个拼贴，一个图片的6个副本，一些翻转，一些颜色变化，等等。我对所有这些都是全新的，我几乎不知道我在做什么。我写了我的代码，但当我在JES和命令探索(新图片)中测试它时，会弹出一个标题为“None”的白色框。我试过把它弄乱，但我被困住了。我有我所有的缺点之前，翻转，改变颜色百分比，等等。我想我的问题是，我测试不正确，或者是我的胶印或拼贴代码下面。为了测试，我输入：

    verticalPicture = flipVertically(myPict)
    redPicture = matchRedToGreen(myPict)
    negativePicture = negative(myPict)
    bluePicture = clearBlue(myPict)
    clockwisePicture = rotateC90(myPict)
    newpicture = makeCollage(myPict)
    explore(newpicture)

def offsetPicture(littlePicture, bigPicture, xOffset, yOffset):
  for aPixel in getPixels(myPict):
  littleX = getX(aPixel)
  littleY = getY(aPixel)
  bigX = littleX + xOffset
  bigY = littleY + yOffset
  bigPicturePixel = getPixel (bigPicture, bigX, 375)
  setColor(bigPicturePixel, getColor (aPixel))

def makeCollage(myPict):
 newWidth = 3*getWidth(myPict)
 newHeight = 2*getHeight(myPict)
 bigPicture = makeEmptyPicture(newWidth, newHeight)
 offsetPicture(littlePicture, bigPicture, 0, 0)
 offsetPicture(clockwisePicture, bigPicture, getWidth(myPict), 0)
 offsetPicture(redPicture, bigPicture, 0, getHeight(myPict))
 offsetPicture(bluePicture, bigPicture, 2*getWidth(myPict), 0)
 offsetPicture(verticalPicture, bigPicture, getWidth(myPict), getHeight(myPict))
 offsetPicture(negativePicture, bigPicture, 2*getWidth(myPict), 2*getHeight(myPict))
return (bigPicture)

Answer 1

代码中有一些缩进错误。我不知道这是否是将代码复制和粘贴到堆栈溢出中的结果。

发现的错误如下：

• return语句makeCollage()需要缩进一个空间。
• offsetPicture()中for循环之后的语句需要缩进。

另外，下面的代码行在顶部。这些行应该是在定义了函数之后进行的。

verticalPicture = flipVertically(myPict)
redPicture = matchRedToGreen(myPict)
negativePicture = negative(myPict)
bluePicture = clearBlue(myPict)
clockwisePicture = rotateC90(myPict)
newpicture = makeCollage(myPict)
explore(newpicture)