math 目录参考

math 的目录依赖关系图

目录
	constraint_checker
	curve1d
	discretized_points_smoothing
	piecewise_jerk
	smoothing_spline

文件
	curve_math.cc
	curve_math.h
	discrete_points_math.cc
	discrete_points_math.h
	polynomial_xd.cc
	polynomial_xd.h