/usr/share/octave/packages/geometry-1.7.0/geom2d/drawCircleArc.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 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | ## 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.
##
## 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.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{h} = } drawCircleArc (@var{xc}, @var{yc}, @var{r}, @var{start}, @var{end})
## @deftypefnx {Function File} {@var{h} = } drawCircleArc (@var{arc})
## @deftypefnx {Function File} {@var{h} = } drawCircleArc (@dots{}, @var{param}, @var{value})
## Draw a circle arc on the current axis
##
## drawCircleArc(XC, YC, R, START, EXTENT);
## Draws circle with center (XC, YC), with radius R, starting from angle
## START, and with angular extent given by EXTENT. START and EXTENT angles
## are given in degrees.
##
## drawCircleArc(ARC);
## Puts all parameters into one single array.
##
## drawCircleArc(..., PARAM, VALUE);
## specifies plot properties by using one or several parameter name-value
## pairs.
##
## H = drawCircleArc(...);
## Returns a handle to the created line object.
##
## @example
## # Draw a red thick circle arc
## arc = [10 20 30 -120 240];
## figure;
## axis([-50 100 -50 100]);
## hold on
## drawCircleArc(arc, 'LineWidth', 3, 'Color', 'r')
## @end example
##
## @seealso{circles2d, drawCircle, drawEllipse}
## @end deftypefn
function varargout = drawCircleArc(varargin)
if nargin == 0
error('Need to specify circle arc');
end
circle = varargin{1};
if size(circle, 2) == 5
x0 = circle(:,1);
y0 = circle(:,2);
r = circle(:,3);
start = circle(:,4);
extent = circle(:,5);
varargin(1) = [];
elseif length(varargin) >= 5
x0 = varargin{1};
y0 = varargin{2};
r = varargin{3};
start = varargin{4};
extent = varargin{5};
varargin(1:5) = [];
else
error('drawCircleArc: please specify center, radius and angles of circle arc');
end
# convert angles in radians
t0 = deg2rad(start);
t1 = t0 + deg2rad(extent);
# number of line segments
N = 60;
# initialize handles vector
h = zeros(length(x0), 1);
# draw each circle arc individually
for i = 1:length(x0)
# compute basis
t = linspace(t0(i), t1(i), N+1)';
# compute vertices coordinates
xt = x0(i) + r(i)*cos(t);
yt = y0(i) + r(i)*sin(t);
# draw the circle arc
h(i) = plot(xt, yt, varargin{:});
end
if nargout > 0
varargout = {h};
end
endfunction
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