에서 이동
def __drawLine(startX, startY, destX, destY) :
# 변수 초기화
path = []
error = 0
orginalX = startX
originalY = startY
# x2 >= x1, y2 > y1 이 되도록 한다.
if startX > dx :
(startX, dx) = (dx, startX)
if startY > dy :
(startY,...
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