bugGNU Octave - Bugs: bug #53097, [octave forge] (nurbs) nrbmak...


bug #53097: [octave forge] (nurbs) nrbmak builds invalid structure

Submitted by:  Juan Pablo Carbajal <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 or Warning
Status:  None Assigned to:  None
Originator Name:  juanpi Open/Closed:  Open
Release:  4.2.1 Operating System:  Any

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Thu 08 Feb 2018 09:42:21 PM UTC, original submission:  

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.

Juan Pablo Carbajal <juanpi>
Project Member


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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-01-26 mtmiller Summary[octave forge](nurbs) nrbmak builds invalid structure => [octave forge] (nurbs) nrbmak builds invalid structure

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