Code covered by the BSD License

geom3d

David Legland (view profile)

19 Jun 2009 (Updated )

Library to handle 3D geometric primitives: create, intersect, display, and make basic computations

Editor's Notes:

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drawCurve3d(varargin)
```function varargout = drawCurve3d(varargin)
%DRAWCURVE3D draw a 3D curve specified by a list of points
%
%   drawCurve3d(COORD) packs coordinates in a single [N*3] array.
%
%   drawCurve3d(PX, PY, PZ) specify coordinates in separate arrays.
%
%   H = drawCurve3d(...) also return a handle to the list of line objects.
%
%   drawPolygon
%
%   ---------
%
%   author : David Legland
%   INRA - TPV URPOI - BIA IMASTE
%   created the 18/02/2005.
%

% HISTORY
% 2010-03-08 rename to drawPolyline3d

% deprecation warning
warning('geom3d:deprecated', ...
'''drawCurve3d'' is deprecated, use ''drawPolyline3d'' instead');

% default value for closed or open curve
closed = false;

% check case we want to draw several curves, stored in a cell array
var = varargin{1};
if iscell(var)
hold on;
h = [];
for i = 1:length(var(:))
h = [h; drawCurve3d(var{i}, varargin{2:end})]; %#ok<AGROW>
end
if nargout>0
varargout{1}=h;
end
return;
end

% extract curve coordinate
if size(var, 2)==1
% first argument contains x coord, second argument contains y coord
% and third one the z coord
px = var;
if length(varargin)<3
error('Wrong number of arguments in drawCurve3d');
end
py = varargin{2};
pz = varargin{3};
varargin = varargin(4:end);
else
% first argument contains both coordinate
px = var(:, 1);
py = var(:, 2);
pz = var(:, 3);
varargin = varargin(2:end);
end

% check if curve is closed or open
if ~isempty(varargin)
var = varargin{1};
if strncmpi(var, 'close', 5)
closed = true;
varargin = varargin(2:end);
elseif strncmpi(var, 'open', 4)
closed = false;
varargin = varargin(2:end);
end
end

% for closed curve, add the first point at the end to close curve
if closed
px = [px; px(1)];
py = [py; py(1)];
pz = [pz; pz(1)];
end

%% draw the curve ! !! ! !
h = plot3(px, py, pz, varargin{:});

if nargout>0
varargout{1} = h;
end```