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## Copyright (C) 2024 David Legland
## 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.
function varargout = drawVertices(varargin)
%DRAWVERTICES Draw the vertices of a polygon or polyline.
%
% drawVertices(POLY)
% Draws the vertices of the given polygon, using pre-defined style.
% Default is to draw vertices as squares, with the first vertex filled.
%
% Example
% poly = circleToPolygon([20 30 40], 16);
% drawPolygon(poly);
% hold on; axis equal;
% drawVertices(poly);
%
% See also
% drawPoint, drawPolygon, drawPolyline
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2011-12-11, using Matlab 7.9.0.529 (R2009b)
% Copyright 2011-2023 INRA - Cepia Software Platform
% extract handle of axis to draw on
if isAxisHandle(varargin{1})
ax = varargin{1};
varargin(1) = [];
else
ax = gca;
end
var = varargin{1};
%% Manage cell arrays of polygons / polylines
% 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) = drawVertices(ax, 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 vertices
if size(var, 2) > 1
% first argument is a vertex array
px = var(:, 1);
py = var(:, 2);
varargin(1) = [];
elseif length(varargin) >= 2 && isnumeric(varargin{1}) && isnumeric(varargin{2})
% arguments 1 and 2 correspond to x and y coordinate respectively
px = varargin{1};
py = varargin{2};
varargin(1:2) = [];
else
% unknow input format
error('Should specify either a N-by-2 array, or 2 N-by-1 vectors');
end
% concatenate input argument(s) with default options
defaults = {'MarkerSize', 6};
if length(varargin) == 1
varargin = [varargin defaults];
else
varargin = [{'ks'} defaults varargin];
end
%% Draw the vertices
% draw the vertices
h = plot(ax, px, py, varargin{:});
% draw the first vertex with a different style
plot(ax, px(1), py(1), 'ks', 'MarkerFaceColor', 'k', 'MarkerSize', 8);
% format output arg
if nargout > 0
varargout = {h};
end
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