/usr/share/octave/packages/vrml-1.0.13/vrml_DirectionalLight.m is in octave-vrml 1.0.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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##
## This program is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free Software
## Foundation; either version 3 of the License, or (at your option) any later
## version.
##
## This program is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
## details.
##
## You should have received a copy of the GNU General Public License along with
## this program; if not, see <http://www.gnu.org/licenses/>.
## s = vrml_DirectionalLight (...) - Vrml DirectionalLight node
##
## s is a string of the form :
## ------------------------------------------------------------------
## DirectionalLight {
## exposedField SFFloat ambientIntensity 0 # [0,1]
## exposedField SFColor color 1 1 1 # [0,1]
## exposedField SFVec3f direction 0 0 -1 # (-,)
## exposedField SFFloat intensity 1 # [0,1]
## exposedField SFBool on TRUE
## }
## ------------------------------------------------------------------
##
## Options :
## All the fields of the node
##
## See also : vrml_PointLight
function s = vrml_DirectionalLight (varargin) # pos 2.1.39
hash = struct ();
for k=1:2:nargin,
hash = setfield(hash,varargin{k:k+1});
end
tpl = struct ("ambientIntensity", "%8.3f",\
"intensity", "%8.3f",\
"direction", "%8.3f",\
"on", "%s",\
"color", "%8.3f %8.3f %8.3f");
body = "";
for [val,key] = hash,
if !(isnumeric(val) && isnan (val)),
# Check validity of field
if !isfield (tpl, key)
error (sprintf ("vrml_PointLight : unknown field '%s'",key));
end
body = [body,\
sprintf(" %-20s %s\n",key,
sprintf(getfield (tpl,key), val))];
end
end
s = sprintf ("DirectionalLight { \n%s}\n", body);
endfunction
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