/usr/share/octave/packages/nurbs-1.3.13/nrbrect.m is in octave-nurbs 1.3.13-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | function curve = nrbrect(w,h)
%
% NRBRECT: Construct NURBS representation of a rectangular curve.
%
% Calling Sequence:
%
% crv = nrbrect()
% crv = nrbrect(size)
% crv = nrbrect(width, height)
%
% INPUT:
%
% size : Size of the square (width = height).
%
% width : Width of the rectangle (along x-axis).
%
% height : Height of the rectangle (along y-axis).
%
% OUTPUT:
%
% crv : NURBS curve, see nrbmak.
%
%
% Description:
%
% Construct a rectangle or square in the x-y plane with the bottom
% lhs corner at (0,0,0). If no rhs arguments provided the function
% constructs a unit square.
%
% Copyright (C) 2000 Mark Spink
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
if nargin < 1
w = 1;
h = 1;
end
if nargin < 2
h = w;
end
coefs = [0 w w w w 0 0 0;
0 0 0 h h h h 0;
0 0 0 0 0 0 0 0;
1 1 1 1 1 1 1 1];
knots = [0 0 0.25 0.25 0.5 0.5 0.75 0.75 1 1];
curve = nrbmak(coefs, knots);
end
%!demo
%! crv = nrbtform(nrbrect(2,1), vecrotz(35*pi/180));
%! nrbplot(crv,4);
%! axis equal
%! title('Construction and rotation of a rectangular curve.');
%! hold off
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