Ground work for full .osg support for osg::TransferFunction*

src/osgPlugins/osg/TransferFunction.cpp

@@ -0,0 +1,55 @@
+#include <osg/TransferFunction>
+
+#include <iostream>
+#include <string>
+
+#include <osg/Vec3>
+#include <osg/Vec4>
+#include <osg/io_utils>
+
+#include <osgDB/ReadFile>
+#include <osgDB/Registry>
+#include <osgDB/Input>
+#include <osgDB/Output>
+#include <osgDB/ParameterOutput>
+
+bool TransferFunction1D_readLocalData(osg::Object &obj, osgDB::Input &fr);
+bool TransferFunction1D_writeLocalData(const osg::Object &obj, osgDB::Output &fw);
+
+osgDB::RegisterDotOsgWrapperProxy TransferFunction1D_Proxy
+(
+    new osg::TransferFunction1D,
+    "TransferFunction1D",
+    "Object TransferFunction1D",
+    TransferFunction1D_readLocalData,
+    TransferFunction1D_writeLocalData
+);
+
+
+bool TransferFunction1D_readLocalData(osg::Object& obj, osgDB::Input &fr)
+{
+    osg::TransferFunction1D& tf = static_cast<osg::TransferFunction1D&>(obj);
+
+    bool itrAdvanced = false;
+    return itrAdvanced;
+}
+
+bool TransferFunction1D_writeLocalData(const osg::Object& obj, osgDB::Output& fw)
+{
+    const osg::TransferFunction1D& tf = static_cast<const osg::TransferFunction1D&>(obj);
+
+    fw.indent()<<"Minimum "<<tf.getMinimum()<<std::endl;
+    fw.indent()<<"Maximum "<<tf.getMaximum()<<std::endl;
+    fw.indent()<<"Colours "<<tf.getNumberCellsX()<<" {"<<std::endl;
+
+    fw.moveIn();
+    for(unsigned int i = 0; i<tf.getNumberCellsX(); ++i)
+    {
+        const osg::Vec4& c = tf.getValue(i);
+        fw.indent()<<c.r()<<" "<<c.g()<<" "<<c.b()<<" "<<c.a()<<std::endl;
+    }        
+    fw.moveOut();
+    fw.indent()<<"}"<<std::endl;
+
+    return true;
+}