--- /dev/null
+## Copyright (C) 2005-2012 Etienne Grossmann <etienne@egdn.net>
+##
+## 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
+