Command Line 6.2.10

3.111. surface command

Description: This command allows the user to create a NURBS (Non-Uniform Rational Basis Spline) surface specifying its control points.

Inline mode usage:

  • surface -h: Displays the help file that summarizes the parameters for this command.
  • surface –n <name> -p <u> <v> <x y z>: Allows to create a NURBS surface.

Interactive mode usage:

  • Invocation: surface
  • Parameters:
    • Number of points in the u direction.
    • Number of points in the v direction.
    • The control points of the surface. For each u coordinate, a point for each v coordinate will be asked. The points are specified by entering its Cartesian (x, y and z) components and a weight parameter that indicates how much that point will pull the surface into it. All these values need to be separated by a blank space.

Example:

>surface

Points in u direction [3]: 2

Points in v direction [3]: 3

Point [0][0] [x y z w]: 0 2 3 1

Point [0][1] [x y z w]: 2 2 3 0.7

Point [0][2] [x y z w]: 2 0 3 1

Point [1][0] [x y z w]: 0 2 0 1

Point [1][1] [x y z w]: 2 2 0 0.7

Point [1][2] [x y z w]: 2 0 0 1

Result:

Resulting NURBS surface

 

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