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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 = drawPolygon3d(varargin)
%DRAWPOLYGON3D Draw a 3D polygon specified by a list of vertex coords.
%
% drawPolygon3d(POLY);
% packs coordinates in a single N-by-3 array.
%
% drawPolygon3d(PX, PY, PZ);
% specifies coordinates in separate numeric vectors (either row or
% columns)
%
% drawPolygon3d(..., PARAM, VALUE);
% Specifies style options to draw the polyline, see plot for details.
%
% H = drawPolygon3d(...);
% also returns a handle to the list of created line objects.
%
% Example
% t = linspace(0, 2*pi, 100)';
% xt = 10 * cos(t);
% yt = 5 * sin(t);
% zt = zeros(100,1);
% pol = [xt yt zt];
% figure; hold on; axis equal;
% fillPolygon3d(pol, 'c');
% drawPolygon3d(pol, 'linewidth', 2, 'color', 'k');
%
% See also
% polygons3d, fillPolygon3d, drawPolyline3d
%
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2011-08-17, from drawPolyline3d, using Matlab 7.9.0.529 (R2009b)
% Copyright 2011-2023 INRA - Cepia Software Platform
%% Process input arguments
% extract handle of axis to draw on
[hAx, varargin] = parseAxisHandle(varargin{:});
% check case we want to draw several curves, stored in a cell array
var1 = varargin{1};
if iscell(var1)
hold on;
nPolys = length(var1);
h = gobjects(1, nPolys);
for i = 1:length(var1(:))
h(i) = drawPolygon3d(hAx, var1{i}, varargin{2:end});
end
if nargout > 0
varargout{1} = h;
end
return;
end
%% extract polygon coordinates
if min(size(var1)) == 1
% if first argument is a vector (either row or column), then assumes
% first argument contains x coords, second argument contains y coords
% and third one the z coords
px = var1;
if length(varargin) < 3
error('geom3d:drawPolygon3d:Wrong number of arguments in fillPolygon3d');
end
py = varargin{2};
pz = varargin{3};
varargin = varargin(4:end);
else
% first argument contains both coordinate
px = var1(:, 1);
py = var1(:, 2);
pz = var1(:, 3);
varargin = varargin(2:end);
end
if any(isnan(px))
varargout{1} = drawPolygon3d(splitPolygons([px py pz]), varargin{:});
return;
end
%% draw the polygon
% check that the polygon is closed
if px(1) ~= px(end) || py(1) ~= py(end) || pz(1) ~= pz(end)
px = [px(:); px(1)];
py = [py(:); py(1)];
pz = [pz(:); pz(1)];
end
% draw the closed curve
h = plot3(hAx, px, py, pz, varargin{:});
%% Format output
if nargout > 0
varargout = {h};
end
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