--- /dev/null
+%% Copyright (c) 2011 Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
+%%
+%% This program is free software: you can redistribute it and/or modify
+%% it under the terms of the GNU General Public License as published by
+%% the Free Software Foundation, either version 3 of the License, or
+%% any later version.
+%%
+%% This program is distributed in the hope that it will be useful,
+%% but WITHOUT ANY WARRANTY; without even the implied warranty of
+%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+%% GNU General Public License for more details.
+%%
+%% You should have received a copy of the GNU General Public License
+%% along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+%% -*- texinfo -*-
+%% @deftypefn {Function File} @var{SVGn} = loadSVG (@var{SVG})
+%% Scales and reflects the @var{SVG} structure and returns a modified @var{SVGn}
+%% structure.
+%%
+%% The height and width of the SVG are scaled such that the diagonal of the
+%% bounding box has length 1. Coordinates are trasnfomed such that a plot of the
+%% paths coincides with the visualization of the original SVG.
+%%
+%% @seealso{svgload, svgpath2polygon}
+%% @end deftypefn
+
+function SVGn = svgnormalize (SVG)
+
+ SVGn = SVG;
+ if ~SVG.normalized
+ % Translate
+ TransV = [0, SVG.height/2];
+ % Scale
+ Dnorm = sqrt (SVG.width ^ 2 + SVG.height ^ 2);
+ S = (1 / Dnorm) * eye (2);
+ for i = 1:numel (SVG.path)
+ nc = size (SVG.path(i).coord, 1);
+ % Translate to middle
+ T = repmat (TransV,nc, 1);
+ SVGn.path(i).coord = SVG.path(i).coord - T;
+ % Reflect
+ SVGn.path(i).coord(:, 2) = -SVGn.path(i).coord(:,2);
+ T(:,2) = -T(:,2);
+ % Translate to bottom
+ SVGn.path(i).coord = SVGn.path(i).coord - T;
+ %Scale
+ SVGn.path(i).coord = SVGn.path(i).coord * S;
+ end
+ SVGn.height = SVG.height / Dnorm;
+ SVGn.width = SVG.width / Dnorm;
+ SVGn.normalized = true;
+ end
+
+end
+
+%!demo
+%! file = 'tmp__.svg';
+%! fid = fopen (file,'w');
+%! svgfile = '<html><body><svg xmlns="http://www.w3.org/2000/svg" version="1.1" height="250" width="250"><path d="M150,0 75,200 225,200 Z" /></svg></body></html>';
+%! fprintf (fid,"%s\n",svgfile);
+%! fclose (fid);
+%! SVG = svgload (file);
+%! SVGn = svgnormalize (SVG);
+%! SVGn
+%! plot([SVGn.path.coord(:,1); SVGn.path.coord(1,1)], ...
+%! [SVGn.path.coord(:,2); SVGn.path.coord(1,2)]);
+%! delete (file);
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff