Added preliminary work on osg::TransferFunction

src/osg/TransferFunction.cpp

@@ -0,0 +1,59 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osg/TransferFunction>
+
+using namespace osg;
+
+///////////////////////////////////////////////////////////////////////
+//
+// TransferFunction base class
+//
+TransferFunction::TransferFunction()
+{
+}
+
+TransferFunction::~TransferFunction()
+{
+}
+
+///////////////////////////////////////////////////////////////////////
+//
+// TransferFunction1D class
+//
+TransferFunction1D::TransferFunction1D()
+{
+    _minimum = 0.0;
+    _maximum = 1.0;
+}
+
+void TransferFunction1D::setInputRange(float minimum, float maximum)
+{
+    _minimum = minimum;
+    _maximum = maximum;
+}
+
+void TransferFunction1D::allocate(unsigned int numX)
+{
+    _colors.resize(numX);
+}
+
+void TransferFunction1D::clear(const osg::Vec4& color)
+{
+    for(Colors::iterator itr = _colors.begin();
+        itr != _colors.end();
+        ++itr)
+    {
+        *itr = color;
+    }
+}