Added osgFX - Marco Jez's special effects nodekit.

src/osgFX/Validator.cpp

@@ -0,0 +1,41 @@
+#include <osgFX/Validator>
+#include <osgFX/Effect>
+
+#include <osg/Notify>
+
+using namespace osgFX;
+
+Validator::Validator()
+:    osg::StateAttribute()
+{
+}
+
+Validator::Validator(Effect *effect)
+:    osg::StateAttribute(),
+    effect_(effect)
+{
+}
+
+Validator::Validator(const Validator &copy, const osg::CopyOp &copyop)
+:    osg::StateAttribute(copy, copyop),
+    effect_(static_cast<Effect *>(copyop(copy.effect_.get())))
+{
+}
+
+void Validator::apply(osg::State &state) const
+{
+    if (!effect_.valid()) return;
+
+    if (effect_->tech_selected_[state.getContextID()] == 0) {
+        Effect::Technique_list::iterator i;
+        int j = 0;
+        for (i=effect_->techs_.begin(); i!=effect_->techs_.end(); ++i, ++j) {
+            if ((*i)->validate(state)) {
+                effect_->sel_tech_[state.getContextID()] = j;
+                effect_->tech_selected_[state.getContextID()] = 1;
+                return;
+            }
+        }
+        osg::notify(osg::WARN) << "Warning: osgFX::Validator: could not find any techniques compatible with the current OpenGL context" << std::endl;
+    }
+}