Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / vrml-1.0.13 / vrml_PointLight.m

diff --git a/octave_packages/vrml-1.0.13/vrml_PointLight.m b/octave_packages/vrml-1.0.13/vrml_PointLight.m
new file mode 100644 (file)
index 0000000..c035ff9
--- /dev/null
+++ b/octave_packages/vrml-1.0.13/vrml_PointLight.m
@@ -0,0 +1,74 @@
+## 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
+