diff --git a/share/doc/pixwerx.xmind b/share/doc/pixwerx.xmind
index 204f29e..6e061eb 100644
Binary files a/share/doc/pixwerx.xmind and b/share/doc/pixwerx.xmind differ
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 6aff23a..d5b0ba3 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -1,5 +1,6 @@
 
 set(hdrs
+	include/pw/core/log.hpp
 	include/pw/core/axisangle.hpp
 	include/pw/core/core.hpp
 	include/pw/core/math.hpp
@@ -10,12 +11,15 @@ set(hdrs
 	include/pw/core/serialize.hpp
 	include/pw/core/image.hpp
 	include/pw/core/size.hpp
+	include/pw/core/timer.hpp
 	include/pw/core/globals.hpp
 	)
 
 set(srcs
+	src/log.cpp
 	src/core.cpp
 	src/serialize.cpp
+	src/timer.cpp
 	${CMAKE_SOURCE_DIR}/README.md
 	${CMAKE_SOURCE_DIR}/LICENSE
 	)
diff --git a/src/core/include/pw/core/matrix.hpp b/src/core/include/pw/core/matrix.hpp
index c0dd064..25fc130 100644
--- a/src/core/include/pw/core/matrix.hpp
+++ b/src/core/include/pw/core/matrix.hpp
@@ -26,6 +26,7 @@
 #ifndef PW_CORE_MATRIX_HPP
 #define PW_CORE_MATRIX_HPP
 
+#include <pw/core/globals.hpp>
 #include <pw/core/matrixbase.hpp>
 #include <pw/core/math.hpp>
 
@@ -319,19 +320,19 @@ void matrix_<R,C,T>::normalize()
 // 4x4
 
 template <typename T>
-class matrix44 : public matrix_<4,4,T>
+class matrix44_ : public matrix_<4,4,T>
 {
 public:
 
 	using matrix_<4,4,T>::matrix_;
 
 
-	matrix44(const matrix_<4,4,T>& i)
+	matrix44_(const matrix_<4,4,T>& i)
 	{
 		*this = i;
 	}
 
-	matrix44& operator = (const matrix_<4,4,T>& rhs) {
+	matrix44_& operator = (const matrix_<4,4,T>& rhs) {
 		if (this != &rhs){
 			this->at(0,0) = rhs.at(0,0);this->at(0,1) = rhs.at(0,1);this->at(0,2) = rhs.at(0,2);this->at(0,3) = rhs.at(0,3);
 			this->at(1,0) = rhs.at(1,0);this->at(1,1) = rhs.at(1,1);this->at(1,2) = rhs.at(1,2);this->at(1,3) = rhs.at(1,3);
@@ -599,8 +600,10 @@ matrix44<T>::LookAt(const matrix<3,1,T> &eye, const matrix<3,1,T> &target, const
 
 // predefined matricies
 
-typedef matrix44<double> matrix44d;
-typedef matrix44<float> matrix44f;
+typedef matrix44_<real_t> matrix44;
+
+typedef matrix44_<double> matrix44d;
+typedef matrix44_<float> matrix44f;
 
 }
 
diff --git a/src/scene/CMakeLists.txt b/src/scene/CMakeLists.txt
index 593de6d..ccff4ab 100644
--- a/src/scene/CMakeLists.txt
+++ b/src/scene/CMakeLists.txt
@@ -3,7 +3,6 @@ set(hdrs
 	include/pw/scene/camera.hpp
 	include/pw/scene/component.hpp
 	include/pw/scene/node.hpp
-	include/pw/scene/nodepath.hpp
 	include/pw/scene/mesh.hpp
 	include/pw/scene/scene.hpp
 	include/pw/scene/transform.hpp
@@ -12,7 +11,6 @@ set(hdrs
 
 set(srcs
 	src/node.cpp
-	src/nodepath.cpp
 	src/camera.cpp
 	src/component.cpp
 	src/mesh.cpp
diff --git a/src/scene/include/pw/scene/camera.hpp b/src/scene/include/pw/scene/camera.hpp
index 52648bd..7b8ae9d 100644
--- a/src/scene/include/pw/scene/camera.hpp
+++ b/src/scene/include/pw/scene/camera.hpp
@@ -49,8 +49,8 @@ public:
 
 	camera();
 
-	void set_projection(const matrix44d &projection);
-	const matrix44d& projection() const;
+	void set_projection(const matrix44 &projection);
+	const matrix44& projection() const;
 
 //	void set_field_of_view(float)
 
@@ -64,7 +64,7 @@ protected:
 
 
 private:
-	matrix44d _projection;
+	matrix44 _projection;
 };
 
 
diff --git a/src/scene/include/pw/scene/component.hpp b/src/scene/include/pw/scene/component.hpp
index c4c2b10..dfa3d43 100644
--- a/src/scene/include/pw/scene/component.hpp
+++ b/src/scene/include/pw/scene/component.hpp
@@ -41,15 +41,27 @@ class node;
 class component {
 public:
 
+	friend class node;
+
     typedef std::shared_ptr<component> ref;
     typedef std::vector<ref> array;
 
     //! only very few components can be attached multiple times
     virtual bool singular() const { return true; }
+	virtual void visit(node*) {}
 
 	component();
     component(const component& other);
     virtual ~component();
+
+	bool enabled() const;
+	void set_enabled(bool enabled);
+
+protected:
+
+	node* _node;
+	bool _enabled;
+
 };
 
 }
diff --git a/src/scene/include/pw/scene/node.hpp b/src/scene/include/pw/scene/node.hpp
index 69c00d0..bf0c516 100644
--- a/src/scene/include/pw/scene/node.hpp
+++ b/src/scene/include/pw/scene/node.hpp
@@ -97,6 +97,20 @@ public:
 	//! paths to root
 	const ptr_array& path() const;
 
+	void traversal();
+
+	template <typename T>
+	T* find()
+	{
+		for (auto c : _components)
+		{
+			T* r = static_cast<T*>(c.get());
+			if (r != nullptr) return r;
+		}
+		return nullptr;
+	}
+
+
 protected:
 
 	ref_array _children; //!< list of children
diff --git a/src/scene/include/pw/scene/nodepath.hpp b/src/scene/include/pw/scene/nodepath.hpp
deleted file mode 100644
index b2b726c..0000000
--- a/src/scene/include/pw/scene/nodepath.hpp
+++ /dev/null
@@ -1,24 +0,0 @@
-#ifndef PW_SCENE_NODEPATH_HPP
-#define PW_SCENE_NODEPATH_HPP
-
-#include <pw/scene/node.hpp>
-
-namespace pw {
-
-class nodepath {
-public:
-
-	nodepath() {}
-
-	void update(node* n);
-
-protected:
-
-	node::ptr_array _path;
-
-};
-
-}
-
-
-#endif // NODEPATH_HPP
diff --git a/src/scene/include/pw/scene/transform.hpp b/src/scene/include/pw/scene/transform.hpp
index 30f1ab7..850489a 100644
--- a/src/scene/include/pw/scene/transform.hpp
+++ b/src/scene/include/pw/scene/transform.hpp
@@ -10,11 +10,12 @@ class transform : public component {
 public:
 
     using component::component;
+	using component::ref;
 
-    const matrix44d& local() const;
-    void set_local(const matrix44d &local);
+	inline const matrix44& local() const { return _local; }
+	void set_local(const matrix44 &local);
 
-    void set_global(const matrix44d &global);
+	void set_global(const matrix44 &global);
 
     void update();
 
@@ -24,11 +25,8 @@ public:
 
 protected:
 
-    matrix44d _local;
-
-    matrix44d _global;
-    matrix44d _global_inverse;
-
+	matrix44 _local;
+	matrix44 _global;
 };
 
 
diff --git a/src/scene/src/camera.cpp b/src/scene/src/camera.cpp
index a121ab0..63c845a 100644
--- a/src/scene/src/camera.cpp
+++ b/src/scene/src/camera.cpp
@@ -4,19 +4,18 @@ namespace pw {
 
 camera::camera()
 	: _fov(60.0)
-	, _near_plane(0.2)
+	, _near_plane(0.2f)
 	, _far_plane(1000)
 {
-	set_projection(matrix44d::perspective_projection(_fov,1,_near_plane,_far_plane));
+	set_projection(matrix44::perspective_projection(_fov,1,_near_plane,_far_plane));
 }
 
-
-void camera::set_projection(const matrix44d& projection)
+void camera::set_projection(const matrix44 &projection)
 {
 	this->_projection = projection;
 }
 
-const matrix44d &camera::projection() const
+const matrix44 &camera::projection() const
 {
 	return _projection;
 }
diff --git a/src/scene/src/component.cpp b/src/scene/src/component.cpp
index 10065d4..2b34789 100644
--- a/src/scene/src/component.cpp
+++ b/src/scene/src/component.cpp
@@ -36,6 +36,16 @@ component::~component()
 //    if (_node != nullptr) _node->unregister_component(this);
 }
 
+bool component::enabled() const
+{
+	return _enabled;
+}
+
+void component::set_enabled(bool enabled)
+{
+	_enabled = enabled;
+}
+
 
 
 //class trs : public transform {
diff --git a/src/scene/src/node.cpp b/src/scene/src/node.cpp
index 2ac65df..f2ad15a 100644
--- a/src/scene/src/node.cpp
+++ b/src/scene/src/node.cpp
@@ -72,6 +72,7 @@ void node::remove_component(component::ref c)
 	component::array::iterator it = _components.end();
 
 	while ((it = std::find(_components.begin(),_components.end(),c)) != _components.end()) {
+		(*it)->_node = nullptr;
 		_components.erase(it);
 	}
 }
@@ -81,6 +82,11 @@ const node::ptr_array &node::path() const
 	return _path;
 }
 
+void node::traversal()
+{
+	for (auto c : _components) c->visit(this);
+}
+
 const component::array& node::components() const
 {
 	return _components;
diff --git a/src/scene/src/nodepath.cpp b/src/scene/src/nodepath.cpp
deleted file mode 100644
index d8d1e02..0000000
--- a/src/scene/src/nodepath.cpp
+++ /dev/null
@@ -1,11 +0,0 @@
-#include "pw/scene/nodepath.hpp"
-#include "pw/scene/node.hpp"
-
-namespace pw {
-
-void nodepath::update(node *n)
-{
-}
-
-
-}
diff --git a/src/scene/src/transform.cpp b/src/scene/src/transform.cpp
index 252b82b..47e1ad0 100644
--- a/src/scene/src/transform.cpp
+++ b/src/scene/src/transform.cpp
@@ -2,20 +2,17 @@
 
 namespace pw {
 
-const matrix44d& transform::local() const
-{
-    return _local;
-}
 
-void transform::set_local(const matrix44d &local)
+void transform::set_local(const matrix44 &local)
 {
     // TODO need to rebuild the transforms: both -> global down and global up
     _local = local;
 }
 
-void transform::set_global(const matrix44d &global)
+void transform::set_global(const matrix44 &global)
 {
-    _global = global; // need to set global inverse
+	//TODO need to rebuild **_local** from parent
+	_global = global;
 }
 
 
diff --git a/src/scene/tests/pwscene_test_node.cpp b/src/scene/tests/pwscene_test_node.cpp
index e3c355b..a065ed6 100644
--- a/src/scene/tests/pwscene_test_node.cpp
+++ b/src/scene/tests/pwscene_test_node.cpp
@@ -2,7 +2,6 @@
 #include <pw/core/serialize.hpp>
 #include <pw/scene/node.hpp>
 #include <pw/scene/transform.hpp>
-#include <pw/scene/nodepath.hpp>
 
 #include <iostream>
 
@@ -46,8 +45,16 @@ int main(int argc,char **argv) {
 
     std::cout << "n components: " << n->components().size() << std::endl;
 
+
 	print_node_path((n));
 
 
+	auto t = n->find<transform>();
+
+	if (t) std::cout << t->local().at(0,0) << std::endl;
+
+
+
+
     return 0;
 }
diff --git a/src/scene/tests/pwscene_test_traverser.cpp b/src/scene/tests/pwscene_test_traverser.cpp
index 638521f..eacc4eb 100644
--- a/src/scene/tests/pwscene_test_traverser.cpp
+++ b/src/scene/tests/pwscene_test_traverser.cpp
@@ -2,7 +2,6 @@
 #include <pw/core/serialize.hpp>
 #include <pw/scene/node.hpp>
 #include <pw/scene/transform.hpp>
-#include <pw/scene/nodepath.hpp>
 #include <pw/scene/traverser.hpp>
 
 #include <iostream>