eddia的专栏

glMap2d, glMap2f The glMap2d and glMap2f functions define a two-dimensional evaluator. void glMap2d(  GLenum target,  GLdouble u1,  GLdouble u2,  GLint ustride,  GLint uorder,  GLdouble v1,  G

引用源： http://www.rhino3d.com/nurbs.htm NURBS, Non-Uniform Rational B-Splines, are mathematical representations of 3-D geometry that can accurately describe any shape from a simple 2-D line, circle