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diff --git a/synfig-core/src/synfig/valuenode_blinereversetangent.cpp b/synfig-core/src/synfig/valuenode_blinereversetangent.cpp
new file mode 100644
index 0000000..ed2928b
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+++ b/synfig-core/src/synfig/valuenode_blinereversetangent.cpp
@@ -0,0 +1,202 @@
+/* === S Y N F I G ========================================================= */
+/*!	\file valuenode_blinereversetangent.cpp
+**	\brief Implementation of the "Reverse Tangent" valuenode conversion.
+**
+**	$Id$
+**
+**	\legal
+**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**	Copyright (c) 2007, 2008 Chris Moore
+**
+**	This package is free software; you can redistribute it and/or
+**	modify it under the terms of the GNU General Public License as
+**	published by the Free Software Foundation; either version 2 of
+**	the License, or (at your option) any later version.
+**
+**	This package 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 GNU
+**	General Public License for more details.
+**	\endlegal
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+#	include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+#	include <config.h>
+#endif
+
+#include "valuenode_blinereversetangent.h"
+#include "valuenode_bline.h"
+#include "valuenode_const.h"
+#include "valuenode_composite.h"
+#include "general.h"
+#include "exception.h"
+#include <ETL/hermite>
+#include <ETL/calculus>
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace std;
+using namespace etl;
+using namespace synfig;
+
+/* === M A C R O S ========================================================= */
+
+/* === G L O B A L S ======================================================= */
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+ValueNode_BLineRevTangent::ValueNode_BLineRevTangent(const ValueBase::Type &x):
+	LinkableValueNode(x)
+{
+}
+
+ValueNode_BLineRevTangent::ValueNode_BLineRevTangent(const ValueNode::Handle &x):
+	LinkableValueNode(x->get_type())
+{
+	if(x->get_type()!=ValueBase::TYPE_BLINEPOINT)
+		throw Exception::BadType(ValueBase::type_local_name(x->get_type()));
+
+	set_link("reference",x);
+	set_link("reverse",ValueNode_Const::create(bool(false)));
+}
+
+ValueNode_BLineRevTangent*
+ValueNode_BLineRevTangent::create(const ValueBase &x)
+{
+	return new ValueNode_BLineRevTangent(ValueNode_Const::create(x));
+}
+
+LinkableValueNode*
+ValueNode_BLineRevTangent::create_new()const
+{
+	return new ValueNode_BLineRevTangent(get_type());
+}
+
+ValueNode_BLineRevTangent::~ValueNode_BLineRevTangent()
+{
+	unlink_all();
+}
+
+ValueBase
+ValueNode_BLineRevTangent::operator()(Time t)const
+{
+	if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
+		printf("%s:%d operator()\n", __FILE__, __LINE__);
+
+	if ((*reverse_)(t).get(bool()))
+	{
+		BLinePoint reference((*reference_)(t));
+		BLinePoint ret(reference);
+		if(ret.get_split_tangent_flag())
+		{
+			ret.set_tangent1(-reference.get_tangent2());
+			ret.set_tangent2(-reference.get_tangent1());
+		}
+		else
+		{
+			// \todo what should we do here really?
+			// it seems that there's some pre-existing bug
+			// with the 'reference' convert, too - referencing
+			// a non-split blinepoint causes some problems
+			ret.set_tangent1(-reference.get_tangent1());
+		}
+		return ret;
+	}
+	else
+		return (*reference_)(t);
+}
+
+String
+ValueNode_BLineRevTangent::get_name()const
+{
+	return "blinerevtangent";
+}
+
+String
+ValueNode_BLineRevTangent::get_local_name()const
+{
+	return _("Reverse Tangent");
+}
+
+bool
+ValueNode_BLineRevTangent::set_link_vfunc(int i,ValueNode::Handle value)
+{
+	assert(i>=0 && i<link_count());
+
+	switch(i)
+	{
+	case 0: CHECK_TYPE_AND_SET_VALUE(reference_, get_type());
+	case 1: CHECK_TYPE_AND_SET_VALUE(reverse_,   ValueBase::TYPE_BOOL);
+	}
+	return false;
+}
+
+ValueNode::LooseHandle
+ValueNode_BLineRevTangent::get_link_vfunc(int i)const
+{
+	assert(i>=0 && i<link_count());
+
+	switch(i)
+	{
+		case 0: return reference_;
+		case 1: return reverse_;
+	}
+
+	return 0;
+}
+
+int
+ValueNode_BLineRevTangent::link_count()const
+{
+	return 2;
+}
+
+String
+ValueNode_BLineRevTangent::link_name(int i)const
+{
+	assert(i>=0 && i<link_count());
+
+	switch(i)
+	{
+		case 0: return "reference";
+		case 1: return "reverse";
+	}
+	return String();
+}
+
+String
+ValueNode_BLineRevTangent::link_local_name(int i)const
+{
+	assert(i>=0 && i<link_count());
+
+	switch(i)
+	{
+		case 0: return _("Reference");
+		case 1: return _("Reverse");
+	}
+	return String();
+}
+
+int
+ValueNode_BLineRevTangent::get_link_index_from_name(const String &name)const
+{
+	if(name=="reference")	return 0;
+	if(name=="reverse")		return 1;
+	throw Exception::BadLinkName(name);
+}
+
+bool
+ValueNode_BLineRevTangent::check_type(ValueBase::Type type)
+{
+	return (type==ValueBase::TYPE_BLINEPOINT);
+}