1 %% Copyright (c) 2011, INRA
2 %% 2005-2011, David Legland <david.legland@grignon.inra.fr>
3 %% 2011 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
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6 %% (simplified BSD License)
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35 %% @deftypefn {Function File} {@var{pt2} = } transformPoint (@var{pt1}, @var{Trans})
36 %% @deftypefnx {Function File} {[@var{px2} @var{py2}]= } transformPoint (@var{px1}, @var{py1}, @var{Trans})
37 %% Transform a point with an affine transform.
39 %% where @var{pt1} has the form [xp yp], and @var{Trans} is a [2x2], [2x3] or [3x3]
40 %% matrix, returns the point transformed with affine transform @var{Trans}.
42 %% Format of @var{Trans} can be one of :
43 %% [a b] , [a b c] , or [a b c]
44 %% [d e] [d e f] [d e f]
47 %% Also works when @var{pt1} is a [Nx2] array of double. In this case, @var{pt2} has
48 %% the same size as @var{pt1}.
50 %% Also works when @var{px1} and @var{py1} are arrays the same size. The function
51 %% transform each couple of (@var{px1}, @var{py1}), and return the result in
52 %% (@var{px2}, @var{py2}), which is the same size as (@var{px1} @var{py1}).
54 %% @seealso{points2d, transforms2d, createTranslation, createRotation}
57 function varargout = transformPoint(varargin)
59 if length(varargin)==2
64 elseif length(varargin)==3
69 error('wrong number of arguments in "transformPoint"');
74 px2 = px*trans(1,1) + py*trans(1,2);
75 py2 = px*trans(2,1) + py*trans(2,2);
77 % add translation vector, if exist
79 px2 = px2 + trans(1,3);
80 py2 = py2 + trans(2,3);
84 if nargout==0 || nargout==1
85 varargout{1} = [px2 py2];