[Octave-bug-tracker] [bug #53097] [octave forge](nurbs) nrbmak builds invalid structure

[Juan Pablo Carbajal]

URL:
  <http://savannah.gnu.org/bugs/?53097>

                 Summary: [octave forge](nurbs) nrbmak builds invalid
structure
                 Project: GNU Octave
            Submitted by: juanpi
            Submitted on: Thu 08 Feb 2018 09:42:21 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: juanpi
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: Any

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Details:

Reading the documentation of nrbmak, I expected the following to produce an
error or a warning


crv = nrbmak([0 0.5 1;0 1 0],[0 0.5 1])


It works, but then


nrbplot (crv)


fails, due to the multiplicity of the initial and final knots. To make ti
work:


crv = nrbmak([0 0.5 1;0 1 0],[0 0 0.5 1 1])


but the doc string reads "The nrbmak not only constructs the proper structure,
but also checks for consistency." which means that the function has a big or
the dcostring is not correct-

It seems to me that the multiplicity of the knots can be internally and
cosistently defined.




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