Moved the IO support for the osgText and osgParticle libraries into seperate

plugin libraries.

src/osgPlugins/osgParticle/IO_ModularEmitter.cpp

@@ -0,0 +1,62 @@
+
+#include <osgParticle/ModularEmitter>
+#include <osgParticle/Counter>
+#include <osgParticle/Placer>
+#include <osgParticle/Shooter>
+
+#include <osgDB/Registry>
+#include <osgDB/Input>
+#include <osgDB/Output>
+
+bool  ModularEmitter_readLocalData(osg::Object &obj, osgDB::Input &fr);
+bool  ModularEmitter_writeLocalData(const osg::Object &obj, osgDB::Output &fw);
+
+osgDB::RegisterDotOsgWrapperProxy  ModularEmitter_Proxy
+(
+    osgNew osgParticle::ModularEmitter,
+    "ModularEmitter",
+    "Object Node ParticleProcessor Emitter ModularEmitter",
+    ModularEmitter_readLocalData,
+    ModularEmitter_writeLocalData
+);
+
+bool ModularEmitter_readLocalData(osg::Object &obj, osgDB::Input &fr)
+{
+    osgParticle::ModularEmitter &myobj = static_cast<osgParticle::ModularEmitter &>(obj);
+    bool itAdvanced = false;
+
+    // we cannot use readObjectOfType() because the Coutner, Placer and Shooter classes are 
+    // abstract and we can't create instances to use as prototypes.
+    // So, we call readObject() and then dynamic cast to the desired class.
+
+    osgParticle::Counter *counter = dynamic_cast<osgParticle::Counter *>(fr.readObject());
+    if (counter) {
+        myobj.setCounter(counter);
+        itAdvanced = true;
+    }
+    
+    osgParticle::Placer *placer = dynamic_cast<osgParticle::Placer *>(fr.readObject());
+    if (placer) {
+        myobj.setPlacer(placer);
+        itAdvanced = true;
+    }
+
+    osgParticle::Shooter *shooter = dynamic_cast<osgParticle::Shooter *>(fr.readObject());
+    if (shooter) {
+        myobj.setShooter(shooter);
+        itAdvanced = true;
+    }
+
+    return itAdvanced;
+}
+
+bool ModularEmitter_writeLocalData(const osg::Object &obj, osgDB::Output &fw)
+{
+    const osgParticle::ModularEmitter &myobj = static_cast<const osgParticle::ModularEmitter &>(obj);
+
+    if (myobj.getCounter()) fw.writeObject(*myobj.getCounter());
+    if (myobj.getPlacer()) fw.writeObject(*myobj.getPlacer());
+    if (myobj.getShooter()) fw.writeObject(*myobj.getShooter());
+
+    return true;
+}