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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 = drawEdge(varargin)
%DRAWEDGE Draw an edge defined by its two extremities.
%
% drawEdge(x1, y1, x2, y2);
% draw an edge between the points (x1 y1) and (x2 y2).
%
% drawEdge([x1 y1 x2 y2]) ;
% drawEdge([x1 y1], [x2 y2]);
% specify data either as bundled edge, or as 2 points
%
% The function supports 3D edges:
% drawEdge([x1 y1 z1 x2 y2 z2]);
% drawEdge([x1 y1 z1], [x2 y2 z2]);
% drawEdge(x1, y1, z1, x2, y2, z2);
%
% Arguments can be single values or array of size [N*1]. In this case,
% the function draws multiple edges.
%
% H = drawEdge(..., OPT), with OPT being a set of pairwise options, can
% specify color, line width and so on...
%
% H = drawEdge(...) return handle(s) to created edges(s)
%
% See also
% edges2d, drawCenteredEdge, drawLine
%
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2003-10-31
% Copyright 2003-2023 INRA - TPV URPOI - BIA IMASTE
% separate edge and optional arguments
[ax, edge, options] = parseInputArguments(varargin{:});
% save hold state
holdState = ishold(ax);
hold(ax, 'on');
% draw the edges
if size(edge, 2) == 4
h = drawEdge_2d(ax, edge, options);
else
h = drawEdge_3d(ax, edge, options);
end
% restore hold state
if ~holdState
hold(ax, 'off');
end
% eventually return handle to created edges
if nargout > 0
varargout = {h};
end
function h = drawEdge_2d(ax, edge, options)
h = -1 * ones(size(edge, 1), 1);
for i = 1:size(edge, 1)
if isnan(edge(i,1))
continue;
end
h(i) = plot(ax, edge(i, [1 3]), edge(i, [2 4]), options{:});
end
function h = drawEdge_3d(ax, edge, options)
h = -1 * ones(size(edge, 1), 1);
for i = 1:size(edge, 1)
if isnan(edge(i,1))
continue;
end
h(i) = plot3(ax, edge(i, [1 4]), edge(i, [2 5]), edge(i, [3 6]), options{:});
end
function [ax, edge, options] = parseInputArguments(varargin)
% extract handle of axis to draw on
[ax, varargin] = parseAxisHandle(varargin{:});
% find the number of arguments defining edges
nbVal = 0;
for i = 1:length(varargin)
if isnumeric(varargin{i})
nbVal = nbVal+1;
else
% stop at the first non-numeric value
break;
end
end
% extract drawing options
options = varargin(nbVal+1:end);
% ensure drawing options have correct format
if length(options) == 1
options = [{'color'}, options];
end
% extract edges characteristics
switch nbVal
case 1
% all parameters in a single array
edge = varargin{1};
case 2
% parameters are two points, or two arrays of points, of size N*2.
p1 = varargin{1};
p2 = varargin{2};
edge = [p1 p2];
case 4
% parameters are 4 parameters of the edge : x1 y1 x2 and y2
edge = [varargin{1} varargin{2} varargin{3} varargin{4}];
case 6
% parameters are 6 parameters of the edge : x1 y1 z1 x2 y2 and z2
edge = [varargin{1} varargin{2} varargin{3} varargin{4} varargin{5} varargin{6}];
otherwise
error('drawEdge:WrongNumberOfParameters', 'Wrong number of parameters');
end
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