%% Copyright (c) 2011, INRA
%% 2008-2011, David Legland <david.legland@grignon.inra.fr>
%% 2011 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
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%% -*- texinfo -*-
%% @deftypefn {Function File} circles2d ()
%% Description of functions operating on circles
%%
%%   Circles are represented by their center and their radius:
%%   C = [xc yc r];
%%   One sometimes considers orientation of circle, by adding an extra
%%   boolean value in 4-th position, with value TRUE for direct (i.e.
%%   turning Counter-clockwise) circles.
%%
%%   Circle arcs are represented by their center, their radius, the starting
%%   angle and the angle extent, both in degrees:
%%   CA = [xc yc r theta0 dtheta];
%%   
%%   Ellipses are represented by their center, their 2 semi-axis length, and
%%   their angle (in degrees) with Ox direction.
%%   E = [xc yc A B theta];
%%
%%   @seealso{ellipses2d, createCircle, createDirectedCircle, enclosingCircle
%%   isPointInCircle, isPointOnCircle
%%   intersectLineCircle, intersectCircles, radicalAxis
%%   circleAsPolygon, circleArcAsCurve
%%   drawCircle, drawCircleArc}
%% @end deftypefn

function circles2d(varargin)

  help('circles2d');

endfunction

