计算两个矩形的重叠面积（均平行于坐标轴）
1 ''' 2 input: rect1, rect2, 均为list,其分别为 3 xl(left),yb(bottom),xr(right),yt(top) 4 ''' 5 def calc_area(rect1, rect2): 6 xl1, yb1, xr1, yt1 = rect1 7 xl2, yb2, xr2, yt2 = rect2 8 xmin = max(xl1, xl2) 9 ymin = max(yb1, yb2) 10 xmax = min(xr1, xr2) 11 ymax = min(yt1, yt2) 12 width = xmax - xmin 13 height = ymax - ymin 14 if width <= 0 or height <= 0: 15 return 0 16 cross_square = width * height 17 return cross_square
