在VC环境下，画点，画线，画面。其中涉及派生类的继承以及虚函数的使用 -in VC environment, painting, line drawing, screen. Involving derivatives such as inheritance and the use of virtual function

Chapter 6 B-spline Surfaces basis.c tbasis.c Calculates the B-spline basis functions. bsplsurf.c tbsurf.c Calculates a B-spline surface. bspsurfu.c tbsurfu.c Calculates a periodic B-spline surface. dbasis.c tdbasis.c Calculates the B-