parametric_torus.py 文件源码

def torusSurface(r0, r1):
    def surface(u, v):
        point = ((r0 + r1*cos(TAU*v))*cos(TAU*u), \
                 (r0 + r1*cos(TAU*v))*sin(TAU*u), \
                  r1*sin(TAU*v))
        return point
    return surface

# Create an object from a surface parameterization