Adding wireframe to the shadow map demo.

samples/o3djs/effect.js

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 1292 matching lines @@
                                               material,
                                               effectType);
   if (effect) {
     material.effect = effect;
     effect.createUniformParameters(material);
 
     // Set a couple of the default parameters in the hopes that this will
     // help the user get something on the screen. We check to make sure they
     // are not connected to something otherwise we'll get an error.
     var param = material.getParam('lightWorldPos');
-    if (!param.inputConnection) {
+    if (param && !param.inputConnection) {
       param.value = lightPos;
     }
     var param = material.getParam('lightColor');
-    if (!param.inputConnection) {
+    if (param && !param.inputConnection) {
       param.value = [1, 1, 1, 1];
     }
     return true;
   } else {
     return false;
   }
 };
 
 /**
  * Creates the uniform parameters needed for an Effect on the given ParamObject.
@@ skipping 46 matching lines @@
   effect.name = o3djs.effect.TWO_COLOR_CHECKER_EFFECT_NAME;
   return effect;
 };
 
 
 // For compatability with o3d code, the default language is o3d shading
 // language.
 o3djs.effect.setLanguage('o3d');