#计算坡道参数

sheet_longitudinal = sheet("longitudinal_profile")

with sheet_longitudinal:
	row = 1
	while not cell(row, 1).empty():
		cell(row, 3).value = cell(row, 0).value - cell(row - 1, 0).value    #坡长
		cell(row, 4).value = (cell(row, 1).value - cell(row - 1, 1).value) / cell(row, 3).value * 100 #坡度
		row = row + 1

	row = 1
	while not cell(row + 1, 1).empty():
		diff = cell(row + 1, 4).value - cell(row, 4).value #坡度差
		cell(row, 5).value = cell(row, 2).value * abs(diff / 100) #曲线长
		cell(row, 6).value = cell(row, 5).value / 2 #切线长
		cell(row, 7).value = cell(row, 6).value * diff / 400 #外距
		row += 1

sheet_longitudinal.fit_content()