/usr/share/octave/packages/geometry-1.7.0/geom2d/createTranslation.m is in octave-geometry 1.7.0-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | ## Copyright (C) 2004-2011 David Legland <david.legland@grignon.inra.fr>
## Copyright (C) 2004-2011 INRA - CEPIA Nantes - MIAJ (Jouy-en-Josas)
## Copyright (C) 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
## All rights reserved.
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## -*- texinfo -*-
## @deftypefn {Function File} {@var{T} = } createTranslation (@var{vector})
## @deftypefnx {Function File} {@var{T} = } createTranslation (@var{dx},@var{dy})
## Create the 3*3 matrix of a translation.
##
## Returns the matrix corresponding to a translation by the vector [@var{dx} @var{dy}].
## The components can be given as two arguments.
## The returned matrix has the form :
## [1 0 TX]
## [0 1 TY]
## [0 0 1]
##
## @seealso{transforms2d, transformPoint, createRotation, createScaling}
## @end deftypefn
function trans = createTranslation(varargin)
# process input arguments
if isempty(varargin)
tx = 0;
ty = 0;
elseif length(varargin)==1
var = varargin{1};
tx = var(1);
ty = var(2);
else
tx = varargin{1};
ty = varargin{2};
end
# create the matrix representing the translation
trans = [1 0 tx ; 0 1 ty ; 0 0 1];
endfunction
%!test
%! trans = createTranslation(2, 3);
%! assert (trans, [1 0 2;0 1 3;0 0 1], 1e-6);
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