TYPE: SOP
TITLE: Fit SOP

Fits a spline curve to a sequence of points, or a spline surface to an m x n
mesh of points. In the first case, the points must represent CVs on a face
primitive (polygon or curve). In the second case, the points must represent CVs
on a hull primitive (mesh or surface). Approximation fitting generates a spline
with fewer CVs than the input data, but the spline does not normally go through
the data points.  Interpolation fitting yields a spline with at least as many
CVs as data points, but the spline touches all the data points.

Parameters:

Fit
    Method           - Fitting style: by approximation or by interpolation
    Primitive Type   - Type of output spline primitive: NURBS or Bezier
    Connectivity     - Type of surface generated when input is a mesh:
        Rows             - Creates horizontal lines, which are display curves.
        Column           - Creates vertical   lines, which are display curves.
        Rows & Cols      - Creates both rows and columns, all display curves.
        Triangles        - Builds the surface with triangles (not used).
        Quadrilaterals   - Creates four-sided quadrilaterals.
        Alt. Triangles   - Creates the surface with alt. triangles (not used).
    U Order          - Order of fitted spline in the U direction        /orderu
    V Order          - Order of fitted spline in the V direction        /orderv

Approximation
    Tolerance        - Primary precision factor in fitting                 /tol
    Smoothness       - Allows for more or less roundness in the shape   /smooth
    U Multiple Knots - Enables preservation of sharp turns of the data in U
    V Multiple Knots - Enables preservation of sharp turns of the data in V

Interpolation
    Scope            - Establishes the interpolation method:
        Global       - Yields as many CVs as data points
        Local        - Yields more CVs than data points but the fit is tighter
        Breakpoints  - Similar to Global, only the basis reflects data directly
    U Data Parameter - Specifies the data parameterization in the U direction:
        Uniform      - Uses evenly spaced parameter values
	Chord Length - Parameter values based on relative distances between data
	Centripetal  - Similar to Chord Length, better suited for sharp corners
    V Data Parameter - Specifies the data parameterization in the V direction:
        Uniform      - Uses evenly spaced parameter values
	Chord Length - Parameter values based on relative distances between data
	Centripetal  - Similar to Chord Length, better suited for sharp corners
    U Wrap           - Optionally close the generated spline in the U direction
    V Wrap           - Optionally close the generated spline in the V direction
    Fit Corners      - Enables corner preservation if the scope is Local
