From Pavel Moloshton, addition of AlphaFunc support to .ive.

src/osgPlugins/ive/AlphaFunc.cpp

@@ -0,0 +1,61 @@
+/**********************************************************************
+ *
+ *	FILE:			AlphaFunc.cpp
+ *
+ *	DESCRIPTION:	Read/Write osg::AlphaFunc in binary format to disk.
+ *
+ *	CREATED BY:		Pavlo Moloshtan
+ *
+ *	HISTORY:		Created 30.11.2003
+ *
+ *	Copyright 2003 VR-C
+ **********************************************************************/
+
+#include "Exception.h"
+#include "AlphaFunc.h"
+#include "Object.h"
+
+using namespace ive;
+
+void AlphaFunc::write(DataOutputStream* out){
+
+  // write AlphaFunc's identification
+  out->writeInt(IVEALPHAFUNC);
+
+  // if the osg class is inherited by any other class we should also write this to file
+  osg::Object*  obj = dynamic_cast<osg::Object*>(this);
+  if(obj)
+    ((ive::Object*)(obj))->write(out);
+  else
+    throw Exception("AlphaFunc::write(): Could not cast this osg::AlphaFunc to an osg::Object.");
+
+  // write AlphaFunc's properties
+  out->writeInt(getFunction());
+  out->writeFloat(getReferenceValue());
+}
+
+void AlphaFunc::read(DataInputStream* in){
+
+  // peek on AlphaFunc's identification
+  int id = in->peekInt();
+  if(id == IVEALPHAFUNC)
+    {
+      // read AlphaFunc's identification
+      id = in->readInt();
+
+      // if the osg class is inherited by any other class we should also read this from file
+      osg::Object*  obj = dynamic_cast<osg::Object*>(this);
+      if(obj)
+        ((ive::Object*)(obj))->read(in);
+      else
+        throw Exception("AlphaFunc::read(): Could not cast this osg::AlphaFunc to an osg::Object.");
+
+      // Read AlphaFunc's properties
+      osg::AlphaFunc::ComparisonFunction comparison_funtion = osg::AlphaFunc::ComparisonFunction(in->readInt());
+      float reference_value = in->readFloat();
+      setFunction(comparison_funtion, reference_value);
+    }
+  else{
+    throw Exception("AlphaFunc::read(): Expected AlphaFunc identification.");
+  }
+}

src/osgPlugins/ive/AlphaFunc.h

@@ -0,0 +1,15 @@
+#ifndef IVE_ALPHAFUNC
+#define IVE_ALPHAFUNC 1
+
+#include <osg/AlphaFunc>
+#include "ReadWrite.h"
+
+namespace ive{
+  class AlphaFunc : public osg::AlphaFunc, public ReadWrite {
+  public:
+    void write(DataOutputStream* out);
+    void read(DataInputStream* in);
+  };
+}
+
+#endif

src/osgPlugins/ive/DataInputStream.cpp

@@ -14,6 +14,7 @@
 
 #include "DataInputStream.h"
 #include "StateSet.h"
+#include "AlphaFunc.h"
 #include "BlendFunc.h"
 #include "Material.h"
 #include "CullFace.h"
@@ -530,7 +531,11 @@ osg::StateAttribute* DataInputStream::readStateAttribute()
 
     osg::StateAttribute* attribute;
     int attributeID = peekInt();
-    if(attributeID == IVEBLENDFUNC){
+    if(attributeID == IVEALPHAFUNC){
+        attribute = new osg::AlphaFunc();
+        ((ive::AlphaFunc*)(attribute))->read(this);
+    }
+    else if(attributeID == IVEBLENDFUNC){
         attribute = new osg::BlendFunc();
         ((ive::BlendFunc*)(attribute))->read(this);
     }

src/osgPlugins/ive/DataOutputStream.cpp

@@ -16,6 +16,7 @@
 #include "Exception.h"
 
 #include "StateSet.h"
+#include "AlphaFunc.h"
 #include "BlendFunc.h"
 #include "Material.h"
 #include "CullFace.h"
@@ -403,7 +404,10 @@ void DataOutputStream::writeStateAttribute(const osg::StateAttribute* attribute)
         writeInt(id);
 
         // write the stateset.
-        if(dynamic_cast<const osg::BlendFunc*>(attribute)){
+        if(dynamic_cast<const osg::AlphaFunc*>(attribute)){
+            ((ive::AlphaFunc*)(attribute))->write(this);
+        }
+        else if(dynamic_cast<const osg::BlendFunc*>(attribute)){
             ((ive::BlendFunc*)(attribute))->write(this);
         }
         // This is a Material

src/osgPlugins/ive/GNUmakefile

@@ -2,6 +2,7 @@ TOPDIR = ../../..
 include $(TOPDIR)/Make/makedefs 
 
 CXXFILES =\
+	AlphaFunc.cpp\
 	AnimationPath.cpp\
 	AnimationPathCallback.cpp\
 	Billboard.cpp\