/usr/share/octave/packages/geometry-1.7.0/polygons2d/drawPolygon.m is in octave-geometry 1.7.0-1build1.
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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 | ## Copyright (C) 2004-2011 David Legland <david.legland@grignon.inra.fr>
## Copyright (C) 2004-2011 INRA - CEPIA Nantes - MIAJ (Jouy-en-Josas)
## 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.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{h} = } drawPolygon (@var{coord})
## @deftypefnx {Function File} {@var{h} = } drawPolygon (@var{px}, @var{py})
## @deftypefnx {Function File} {@var{h} = } drawPolygon (@var{polys})
## Draw a polygon specified by a list of points.
##
## drawPolygon(COORD);
## Packs coordinates in a single [N*2] array.
##
## drawPolygon(PX, PY);
## Specifies coordinates in separate arrays.
##
## drawPolygon(POLYS)
## Packs coordinate of several polygons in a cell array. Each element of
## the array is a Ni*2 double array.
##
## H = drawPolygon(...);
## Also return a handle to the list of line objects.
##
##
## @seealso{polygons2d, drawCurve}
## @end deftypefn
function varargout = drawPolygon(varargin)
# check input
if isempty(varargin)
error('need to specify a polygon');
end
var = varargin{1};
## Manage cell arrays of polygons
# case of a set of polygons stored in a cell array
if iscell(var)
N = length(var);
h = zeros(N, 1);
for i = 1:N
state = ishold(gca);
hold on;
# check for empty polygons
if ~isempty(var{i})
h(i) = drawPolygon(var{i}, varargin{2:end});
end
if ~state
hold off
end
end
if nargout > 0
varargout = {h};
end
return;
end
## Parse coordinates and options
# Extract coordinates of polygon vertices
if size(var, 2) > 1
# first argument is a polygon array
px = var(:, 1);
py = var(:, 2);
varargin(1) = [];
else
# arguments 1 and 2 correspond to x and y coordinate respectively
if length(varargin) < 2
error('Should specify either a N-by-2 array, or 2 N-by-1 vectors');
end
px = varargin{1};
py = varargin{2};
varargin(1:2) = [];
end
# set default line format
if isempty(varargin)
varargin = {'b-'};
end
# check case of polygons with holes
if sum(isnan(px(:))) > 0
polygons = splitPolygons([px py]);
h = drawPolygon(polygons);
if nargout > 0
varargout = {h};
end
return;
end
## Draw the polygon
# ensure last point is the same as the first one
px(size(px, 1)+1, :) = px(1,:);
py(size(py, 1)+1, :) = py(1,:);
# draw the polygon outline
h = plot(px, py, varargin{:});
# format output arg
if nargout > 0
varargout = {h};
end
endfunction
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