/usr/share/octave/packages/nurbs-1.3.10/nrbcylind.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 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | function surf = nrbcylind(height,radius,center,sang,eang)
%
% NRBCYLIND: Construct a cylinder or cylindrical patch.
%
% Calling Sequence:
%
% srf = nrbcylind()
% srf = nrbcylind(height)
% srf = nrbcylind(height,radius)
% srf = nrbcylind(height,radius,center)
% srf = nrbcylind(height,radius,center,sang,eang)
%
% INPUT:
%
% height : Height of the cylinder along the axis, default 1.0
%
% radius : Radius of the cylinder, default 1.0
%
% center : Center of the cylinder, default (0,0,0)
%
% sang : Start angle relative to the origin, default 0.
%
% eang : End angle relative to the origin, default 2*pi.
%
% OUTPUT:
%
% srf : cylindrical surface patch
%
% Description:
%
% Construct a cylinder or cylindrical patch by extruding a circular arc.
%
% 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
height = 1;
end
if nargin < 2
radius = 1;
end
if nargin < 3
center = [];
end
if nargin < 5
sang = 0;
eang = 2*pi;
end
surf = nrbextrude(nrbcirc(radius,center,sang,eang),[0.0 0.0 height]);
end
%!demo
%! srf = nrbcylind(3,1,[],deg2rad(270),deg2rad(180));
%! nrbplot(srf,[20,20]);
%! axis equal;
%! title('Cylinderical section by extrusion of a circular arc.');
%! hold off
|