/usr/share/octave/packages/geometry-1.7.0/polygons2d/drawPolyline.m is in octave-geometry 1.7.0-1build1.
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 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | ## Copyright (C) 2003-2011 David Legland <david.legland@grignon.inra.fr>
## Copyright (C) 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are met:
##
## 1 Redistributions of source code must retain the above copyright notice,
## this list of conditions and the following disclaimer.
## 2 Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in the
## documentation and/or other materials provided with the distribution.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
## AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
## ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
## ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
## DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
## SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
## CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##
## The views and conclusions contained in the software and documentation are
## those of the authors and should not be interpreted as representing official
## policies, either expressed or implied, of the copyright holders.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{} =} drawPolyline (@var{}, @var{})
##DRAWPOLYLINE Draw a polyline specified by a list of points
##
## drawPolyline(COORD);
## packs coordinates in a single [N*2] array.
##
## drawPolyline(PX, PY);
## specifies coordinates in separate arrays. PX and PY must be column
## vectors with the same length.
##
## drawPolyline(..., TYPE);
## where TYPE is either 'closed' or 'open', specifies if last point must
## be connected to the first one ('closed') or not ('open').
## Default is 'open'.
##
## drawPolyline(..., PARAM, VALUE);
## specify plot options as described for plot command.
##
## H = drawPolyline(...) also return a handle to the list of line objects.
##
## Example:
## @example
## # Draw a curve representing an ellipse
## t = linspace(0, 2*pi, 100)';
## px = 10*cos(t); py = 5*sin(t);
## drawPolyline([px py], 'closed');
## axis equal;
##
## # The same, with different drawing options
## drawPolyline([px py], 'closed', 'lineWidth', 2, 'lineStyle', '--');
## @end example
##
## @seealso{polygons2d, drawPolygon}
## @end deftypefn
function varargout = drawPolyline(varargin)
# default values
closed = false;
# If first argument is a cell array, draw each curve individually,
# and eventually returns handle of each plot.
var = varargin{1};
if iscell(var)
h = [];
for i=1:length(var(:))
h = [h ; drawPolyline(var{i}, varargin{2:end})];
end
if nargout>0
varargout{1}=h;
end
return;
end
# extract curve coordinate
if size(var, 2)==1
# first argument contains x coord, second argument contains y coord
px = var;
if length(varargin)==1
error('Wrong number of arguments in drawPolyline');
end
py = varargin{2};
varargin = varargin(3:end);
else
# first argument contains both coordinate
px = var(:, 1);
py = var(:, 2);
varargin = varargin(2:end);
end
# check if curve is closed or open
if ~isempty(varargin)
var = varargin{1};
if strncmpi(var, 'close', 5)
closed = true;
varargin = varargin(2:end);
elseif strncmpi(var, 'open', 4)
closed = false;
varargin = varargin(2:end);
end
end
# if curve is closed, add first point at the end of the list
if closed
px = [px; px(1)];
py = [py; py(1)];
end
# plot the curve, with eventually optional parameters
h = plot(px, py, varargin{:});
# format output arguments
if nargout>0
varargout{1}=h;
end
endfunction
%!demo
%! t = linspace (0, 2*pi, 100)';
%! px = 10*cos (t); py = 5*sin (t);
%!
%! subplot (1,2,1)
%! drawPolyline ([px py], 'closed');
%! axis equal;
%!
%! subplot (1,2,2)
%! drawPolyline([px py], 'closed', 'lineWidth', 2, 'lineStyle', '--');
%! axis equal;
%! # -------------------------------------------------
%! # Draw a curve representing an ellipse with two drawing options
|