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## Copyright (C) 2024 David Legland
## 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.
##
## The views and conclusions contained in the software and documentation are
## those of the authors and should not be interpreted as representing official
## policies, either expressed or implied, of the copyright holders.
function h = drawRay3d(varargin)
%DRAWRAY3D Draw a 3D ray on the current axis.
%
% drawRay3d(RAY)
% With RAY having the syntax: [x0 y0 z0 dx dy dz], draws the ray starting
% from point (x0 y0 z0) and going to direction (dx dy dz), clipped with
% the current window axis.
%
% drawRay3d(RAY, PARAMS, VALUE)
% Can specify parameter name-value pairs to change draw style.
%
% H = drawRay3d(...)
% Returns the handle of the line object.
%
% Example
% % generate 50 random 3D rays
% origin = [29 28 27];
% v = rand(50, 3);
% v = v - centroid(v);
% ray = [repmat(origin, size(v,1),1) v];
% % draw the rays in the current axis
% figure; axis equal; axis([0 50 0 50 0 50]); hold on; view(3);
% drawRay3d(ray);
%
% See also
% drawLine3d, clipRay3d
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2020-05-25, using Matlab 9.8.0.1323502 (R2020a)
% Copyright 2020-2023 INRAE - BIA Research Unit - BIBS Platform (Nantes)
% extract handle of axis to draw on
[hAx, varargin] = parseAxisHandle(varargin{:});
ray = varargin{1};
varargin(1) = [];
% get bounding box limits
box = axis(hAx);
% clip the ray(s) with the limits of the current axis
edge = clipLine3d(ray, box);
% identify valid edges
inds = sum(isnan(edge), 2) == 0;
% draw the clipped line
hh = [];
if any(inds)
edge = edge(inds, :);
hh = drawEdge3d(hAx, edge);
if ~isempty(varargin)
set(hh, varargin{:});
end
end
% process output
if nargout > 0
h = hh;
end
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