[c0a266]: inst / vrml_PointLight.m  Maximize  Restore  History

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## Copyright (C) 2002 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_PointLight (...) - Vrml PointLight node
##
## s is a string of the form :
## ------------------------------------------------------------------
## PointLight {
## exposedField SFFloat ambientIntensity 0 ## [0,1]
## exposedField SFVec3f attenuation 1 0 0 ## [0,inf)
## exposedField SFColor color 1 1 1 ## [0,1]
## exposedField SFFloat intensity 1 ## [0,1]
## exposedField SFVec3f location 0 0 0 ## (-inf,inf)
## exposedField SFBool on TRUE
## exposedField SFFloat radius 100 ## [0,inf)
## }
## ------------------------------------------------------------------
##
## Options :
## All the fields of the node
##
## Example : s = vrml_PointLight ("location",[0 0 1]);
##
## See also : vrml_DirectionalLight
function s = vrml_PointLight (varargin)
if mod(nargin,2) != 0, print_usage; end
h = struct (varargin{:});
tpl = struct ("ambientIntensity", "%8.3f",...
"intensity", "%8.3f",...
"radius", "%8.3f",...
"on", "%s",...
"attenuation", "%8.3f %8.3f %8.3f",...
"color", "%8.3f %8.3f %8.3f",...
"location", "%8.3f %8.3f %8.3f");
body = "";
for [val,key] = h,
if strcmp (key, "DEF")
continue;
elseif !(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 ("PointLight {\n%s}\n", body);
if isfield (h,"DEF") && !isempty (h.DEF)
s = ["DEF ",h.DEF," ",s];
end
endfunction