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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 poly = edgeToPolyline(edge, N)
%EDGETOPOLYLINE Convert an edge to a polyline with a given number of segments.
%
% POLY = edgeToPolyline(EDGE, N)
%
% Example
% edge = [10 20 60 40];
% poly = edgeToPolyline(edge, 10);
% drawEdge(edge, 'lineWidth', 2);
% hold on
% drawPoint(poly);
% axis equal;
%
% See also
% edges2d, drawEdge, drawPolyline
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2011-11-25, using Matlab 7.9.0.529 (R2009b)
% Copyright 2011-2023 INRA - Cepia Software Platform
if N < 1
error('number of segments must be greater than 1');
end
if length(edge) == 4
% case of planar edges
p1 = edge(1:2);
p2 = edge(3:4);
poly = [linspace(p1(1), p2(1), N+1)' linspace(p1(2), p2(2), N+1)'];
else
% case of 3D edges
p1 = edge(1:3);
p2 = edge(4:6);
poly = [...
linspace(p1(1), p2(1), N+1)' ...
linspace(p1(2), p2(2), N+1)' ...
linspace(p1(3), p2(3), N+1)'];
end
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