我正在尝试编写一个
python函数,它将从图片上的任何位置复制三角形区域到新的空白图片.我可以将图片中的矩形区域复制到新的空白图片,但我不知道如何复制三角形.这就是我所拥有的,但它只复制一个矩形区域.对不起,如果它看起来很乱或过于复杂,但我刚刚开始如何用python编写.
def copyTriangle():
file=pickAFile()
oldPic=makePicture(file)
newPic=makeEmptyPicture(getWidth(oldPic),getHeight(oldPic))
xstart=getWidth(oldPic)/2
ystart=getHeight(oldPic)/2
for y in range(ystart,getHeight(oldPic)):
for x in range(xstart,getWidth(oldPic)):
oldPixel=getPixel(oldPic,x,y)
colour=getColor(oldPixel)
newPixel=getPixel(newPic,x,y)
setColor(newPixel,colour)
最佳答案 将三角形区域从一张照片复制到另一张照片的功能.
def selectTriangle(pic):
w= getWidth (pic)
h = getHeight(pic)
newPic = makeEmptyPicture(w,h)
x0=107#test point 0
y0=44
x1=52#test point 1
y1=177
x2=273 #test point 2
y2=216
#(y-y0)/(y1-y0)=(x-x0)/(x1-x0)
for y in range (0,h):
for x in range (0, w):
#finding pixels within the plotted lines between eat set of points
if (x>((y-y0)*(x1-x0)/(y1-y0)+x0) and x<((y-y0)*(x2-x0)/(y2-y0)+x0) and x>((y-y2)*(x1-x2)/(y1-y2)+x2)):
pxl = getPixel(pic, x, y)
newPxl= getPixel(newPic,x,y)
color = getColor(pxl)
setColor (newPxl, color)
return (newPic)