/usr/share/octave/packages/geometry-1.7.0/geom2d/drawCenteredEdge.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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | ## 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} =} drawCenteredEdge (@var{center}, @var{L}, @var{theta})
## @deftypefnx {Function File} {@var{h} =} drawCenteredEdge (@var{edge})
## @deftypefnx {Function File} {@var{h} =} drawCenteredEdge (@dots{}, @var{name},@var{value})
## Draw an edge centered on a point.
##
## drawCenteredEdge(CENTER, L, THETA)
## Draws an edge centered on point CENTER, with length L, and orientation
## THETA (given in degrees). Input arguments can also be arrays, that must
## all have the same number odf rows.
##
## drawCenteredEdge(EDGE)
## Concatenates edge parameters into a single N-by-4 array, containing:
## [XC YV L THETA].
##
## drawCenteredEdge(..., NAME, VALUE)
## Also specifies drawing options by using one or several parameter name -
## value pairs (see doc of plot function for details).
##
## H = drawCenteredEdge(...)
## Returns handle(s) to the created edges(s).
##
## @example
## # Draw an ellipse with its two axes
## figure(1); clf;
## center = [50 40];
## r1 = 30; r2 = 10;
## theta = 20;
## elli = [center r1 r2 theta];
## drawEllipse(elli, 'linewidth', 2);
## axis([0 100 0 100]); axis equal;
## hold on;
## edges = [center 2*r1 theta ; center 2*r2 theta+90];
## drawCenteredEdge(edges, 'linewidth', 2, 'color', 'g');
## @end example
##
## @seealso{edges2d, drawEdge}
## @end deftypefn
function varargout = drawCenteredEdge(center, len, theta, varargin)
## process input variables
if size(center, 2) == 4
# manage edge in single parameter
varargin = [{len, theta}, varargin];
len = center(:, 3);
theta = center(:, 4);
center = center(:, 1:2);
N = size(center, 1);
else
# parameters given in different arguments
# size of data
NP = size(center, 1);
NL = size(len, 1);
ND = size(theta, 1);
N = max([NP NL ND]);
# ensure all data have same size
if N > 1
if NP == 1, center = repmat(center, [N 1]); end
if NL == 1, len = repmat(len, [N 1]); end
if ND == 1, theta = repmat(theta, [N 1]); end
end
end
# extract drawing options
options = varargin(:);
## Draw edges
# coordinates of center point
xc = center(:, 1);
yc = center(:, 2);
# convert angle to radians
theta = theta * pi / 180;
# computation shortcuts
cot = cos(theta);
sit = sin(theta);
# compute starting and ending points
x1 = xc - len .* cot / 2;
x2 = xc + len .* cot / 2;
y1 = yc - len .* sit / 2;
y2 = yc + len .* sit / 2;
# draw the edges
h = zeros(N, 1);
for i = 1:N
h(i) = plot([x1(i) x2(i)], [y1(i) y2(i)]);
end
# apply style to edges
if ~isempty(options) > 0
for i = 1:N
set(h(i), options{:});
end
end
## Format output
# process output arguments
if nargout > 0
varargout = {h};
end
endfunction
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