Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / geometry-1.5.0 / polygons2d / reversePolygon.m

diff --git a/octave_packages/geometry-1.5.0/polygons2d/reversePolygon.m b/octave_packages/geometry-1.5.0/polygons2d/reversePolygon.m
new file mode 100644 (file)
index 0000000..b0febf2
--- /dev/null
+++ b/octave_packages/geometry-1.5.0/polygons2d/reversePolygon.m
@@ -0,0 +1,44 @@
+%% Copyright (C) 2003-2011 David Legland <david.legland@grignon.inra.fr>
+%% Copyright (C) 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
+%% 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.
+
+%% -*- texinfo -*-
+%% @deftypefn {Function File} {@var{poly2} = } reversePolygon (@var{poly})
+%% Reverse a polygon, by iterating vertices from the end
+%%
+%%   POLY2 = reversePolygon(POLY)
+%%   POLY2 has same vertices as POLY, but in different order. The first
+%%   vertex of the polygon is still the same.
+%%
+%% @seealso{reversePolyline}
+%% @end deftypefn
+
+function rev = reversePolygon(poly)
+
+  rev = poly([1 end:-1:2], :);
+
+endfunction