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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 = drawPolyline3d(varargin)
%DRAWPOLYLINE3D Draw a 3D polyline specified by a list of vertex coords.
%
% drawPolyline3d(POLY);
% packs coordinates in a single N-by-3 array.
%
% drawPolyline3d(PX, PY, PZ);
% specifies coordinates in separate numeric vectors (either row or
% columns)
%
% drawPolyline3d(..., CLOSED);
% Specifies if the polyline is closed or open. CLOSED can be one of:
% - 'closed'
% - 'open' (the default)
% - a boolean variable with value TRUE for closed polylines.
%
% drawPolyline3d(..., PARAM, VALUE);
% Specifies style options to draw the polyline, see plot for details.
%
% H = drawPolyline3d(...);
% 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(1,100);
% figure; drawPolyline3d(xt, yt, zt, 'b');
%
% See also
% polygons3d, drawPolygon3d, fillPolygon3d
%
% ------
% Author : David Legland
% E-mail: david.legland@inrae.fr
% Created: 2005-02-15
% Copyright 2005-2023 INRA - TPV URPOI - BIA IMASTE
%% 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
var = varargin{1};
if iscell(var)
hold on;
nPolys = length(var(:));
h = gobjects(1, nPolys);
for i = 1:nPolys
h(i) = drawPolyline3d(hAx, var{i}, varargin{2:end});
end
if nargout > 0
varargout = {h};
end
return;
end
% extract vertex coordinates
if min(size(var)) == 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 = var;
if length(varargin) < 3
error('geom3d:drawPolyline3d:Wrong number of arguments in drawPolyline3d');
end
if isnumeric(varargin{2}) && isnumeric(varargin{3})
py = varargin{2};
pz = varargin{3};
varargin(1:3) = [];
else
px = var(:, 1);
py = var(:, 2);
pz = var(:, 3);
varargin(1) = [];
end
else
% all coordinates are grouped in the first argument
px = var(:, 1);
py = var(:, 2);
pz = var(:, 3);
varargin(1) = [];
end
% check if polyline is closed or open (default is open)
closed = false;
if ~isempty(varargin)
var = varargin{1};
if islogical(var)
% check boolean flag
closed = var;
varargin = varargin(2:end);
elseif ischar(var)
% check string indicating close or open
if strncmpi(var, 'close', 5)
closed = true;
varargin = varargin(2:end);
elseif strncmpi(var, 'open', 4)
closed = false;
varargin = varargin(2:end);
end
end
end
%% draw the polyline curve
% for closed curve, add the first point at the end to close curve
if closed
px = [px(:); px(1)];
py = [py(:); py(1)];
pz = [pz(:); pz(1)];
end
h = plot3(hAx, px, py, pz, varargin{:});
if nargout > 0
varargout = {h};
end
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