2.8 branch: backport of osgAnimation from svn head 11026.

src/osgAnimation/StackedMatrixElement.cpp

@@ -0,0 +1,40 @@
+/*  -*-c++-*- 
+ *  Copyright (C) 2009 Cedric Pinson <cedric.pinson@plopbyte.net>
+ *
+ * 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 <osgAnimation/StackedMatrixElement>
+
+using namespace osgAnimation;
+
+StackedMatrixElement::StackedMatrixElement() {}
+StackedMatrixElement::StackedMatrixElement(const std::string& name, const osg::Matrix& matrix) : StackedTransformElement(), _matrix(matrix) { setName(name); }
+StackedMatrixElement::StackedMatrixElement(const osg::Matrix& matrix) : _matrix(matrix) { setName("matrix"); }
+
+StackedMatrixElement::StackedMatrixElement(const StackedMatrixElement& rhs, const osg::CopyOp& c) : StackedTransformElement(rhs, c), _matrix(rhs._matrix)
+{
+    if (rhs._target.valid())
+        _target = new MatrixTarget(*rhs._target);
+}
+
+Target* StackedMatrixElement::getOrCreateTarget()
+{
+    if (!_target.valid())
+        _target = new MatrixTarget(_matrix);
+    return _target.get(); 
+}
+
+void StackedMatrixElement::update()
+{
+    if (_target.valid())
+        _matrix = _target->getValue();
+}