1## Copyright (C) 2021 David Legland
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27
28function drawPartialPatch(u, v, z, varargin)
29%DRAWPARTIALPATCH draw surface patch, with 2 parametrized surfaces.
30%
31%   usage :
32%   drawSurfPatch(u, v, zuv)
33%   where u, v, and zuv are three matrices the same size, u and
34%   corresponding to each parameter, and zuv being equal to a function of u
35%   and v.
36%
37%   drawSurfPatch(u, v, zuv, p0)
38%   If p0 is specified, two lines with u(p0(1)) and v(p0(2)) are drawn on
39%   the surface
40%
41%
42%   ---------
43%
44%   author : David Legland
45%   INRA - TPV URPOI - BIA IMASTE
46%   created the 24/05/2005.
47%
48
49%   HISTORY
50%   2005-06-08 add doc.
51%   2007-01-04 remove unused variables and change function name
52%   2010-03-08 code cleanup, use drawPolyline3d
53
54% prepare figure
55hold on;
56
57% draw the surface interior
58surf(u, v, z, 'FaceColor', 'g', 'EdgeColor', 'none');
59
60% draw the surface boundaries
61drawPolyline3d(u(1,:), v(1,:), z(1,:))
62drawPolyline3d(u(end,:), v(end,:), z(end,:))
63drawPolyline3d(u(:,end), v(:,end), z(:,end))
64drawPolyline3d(u(:,1), v(:,1), z(:,1))
65
66% eventually draw two perpendicular lines on the surface
67if ~isempty(varargin)
68    pos = varargin{1};
69    drawPolyline3d(u(pos(1),:), v(pos(1),:), z(pos(1),:));
70    drawPolyline3d(u(:,pos(2)), v(:,pos(2)), z(:,pos(2)));
71end
72