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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 dest = transformLine(line, trans)
%TRANSFORMLINE Transform a line with an affine transform.
%
% LINE2 = transformLine(LINE1, TRANS);
% returns the line LINE1 transformed with affine transform TRANS.
% LINE1 has the form [x0 y0 dx dy], and TRANS is a transformation
% matrix.
%
% Format of TRANS can be one of :
% [a b] , [a b c] , or [a b c]
% [d e] [d e f] [d e f]
% [0 0 1]
%
% LINE2 = transformLine(LINES, TRANS);
% Also work when LINES is a [N*4] array of double. In this case, LINE2
% has the same size as LINE.
%
% See also
% lines2d, transforms2d, transformPoint
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2004-04-06
% Copyright 2004-2023 INRA - TPV URPOI - BIA IMASTE
% isolate points
points1 = line(:, 1:2);
points2 = line(:, 1:2) + line(:, 3:4);
% transform points
points1 = transformPoint(points1, trans);
points2 = transformPoint(points2, trans);
dest = createLine(points1, points2);
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