/usr/share/octave/packages/nurbs-1.3.10/nrbline.m is in octave-nurbs 1.3.10-1.
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 | function curve = nrbline(p1,p2)
%
% NRBLINE: Construct a straight line.
%
% Calling Sequence:
%
% crv = nrbline()
% crv = nrbline(p1,p2)
%
% INPUT:
%
% p1 : 2D or 3D cartesian coordinate of the start point.
%
% p2 : 2D or 3D cartesian coordinate of the end point.
%
% OUTPUT:
%
% crv : NURBS curve for a straight line.
%
% Description:
%
% Constructs NURBS data structure for a straight line. If no rhs
% coordinates are included the function returns a unit straight
% line along the x-axis.
%
% 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/>.
coefs = [zeros(3,2); ones(1,2)];
if nargin < 2
coefs(1,2) = 1.0;
else
coefs(1:length(p1),1) = p1(:);
coefs(1:length(p2),2) = p2(:);
end
curve = nrbmak(coefs, [0 0 1 1]);
end
%!demo
%! crv = nrbline([0.0 0.0 0.0]',[5.0 4.0 2.0]');
%! nrbplot(crv,1);
%! grid on;
%! title('3D straight line.');
%! hold off
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