1## Copyright (C) 2021 David Legland
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27
28function line = edgeToLine(edge)
29%EDGETOLINE Convert an edge to a straight line.
30%
31%   LINE = edgeToLine(EDGE);
32%   Returns the straight line containing the edge EDGE.
33%   EDGE is represented as [X1 Y1  X2 Y2]
34%   LINE is represented as [X0 Y0  DX DY]
35%
36%   Example
37%       edge = [2 3 4 5];
38%       line = edgeToLine(edge);
39%       figure(1); hold on; axis([0 10 0 10]);
40%       drawLine(line, 'color', 'g')
41%       drawEdge(edge, 'linewidth', 2)
42%
43%   See also
44%   edges2d, lines2d, lineToEdge
45%
46
47% ------
48% Author: David Legland
49% e-mail: david.legland@inra.fr
50% Created: 2009-07-23,    using Matlab 7.7.0.471 (R2008b)
51% Copyright 2009 INRA - Cepia Software Platform.
52
53line = [edge(:, 1:2) edge(:, 3:4)-edge(:, 1:2)];
54