diff --git a/src/core/include/pw/core/matrix.hpp b/src/core/include/pw/core/matrix.hpp
index 2f9a13f..2843872 100644
--- a/src/core/include/pw/core/matrix.hpp
+++ b/src/core/include/pw/core/matrix.hpp
@@ -48,6 +48,11 @@ public:
 
 	matrix_& operator = (const matrix_& other);
 
+    matrix_(std::initializer_list<T> il)
+    {
+//        for (int i = 0;i < il.size();i++) (*this).at(i) = il[i];
+    }
+
 	matrix_ transposed() const;
 
 	inline matrix_& operator *= (const T& b) { for (unsigned int i = this->cells(); i--> 0;) this->at(i) *= b; return *this; }
@@ -102,7 +107,7 @@ public:
 	matrix_<R,C,T>& copy_from_data(const T* src) { for (unsigned int i = 0; i < R*C; ++i) { (*this).at(i) = src[i]; } return *this; }
 
 	matrix_<R,C,T> operator * (const matrix_<R,C,T>& rhs) const {
-		return mul(*this,rhs);
+        return mul(rhs);
 	}
 
 	const matrix_<C,R,T> reshape() const {
@@ -124,6 +129,26 @@ public:
 	}
 
 	void normalize();
+
+    template <unsigned int bC>
+    matrix_<R,bC,T> mul(const matrix_<R,bC,T>& B) const
+    {
+        // aC == bR
+        // set all null
+        matrix_<R,bC,T> res;
+        res.fill(0);
+
+        // compute all resulting cells
+        for (unsigned int r = 0; r < R; ++r) {
+            for (unsigned int c = 0; c < bC; ++c) {
+                // building inner product
+                for (unsigned int iI = 0; iI < R;iI++) {
+                    res.at(r,c) += (*this).at(r,iI) * B.at(iI,c);
+                }
+            }
+        }
+        return res;
+    }
 };
 
 /////////////////////////////////////////////////////////////////////////////
@@ -176,28 +201,32 @@ inline matrix_<R,C,T> operator - (const matrix_<R,C,T>& a, const matrix_<R,C,T>&
 	return res;
 }
 
+
+
+//template <unsigned int aR,unsigned int aCbR, unsigned int bC, typename T>
+//matrix_<aR,bC,T> static inline
+//mul(const matrix_<aR,aCbR,T>& A, const matrix_<aCbR,bC,T>& B)
+//{
+//	// aC == bR
+//	// set all null
+//	matrix_<aR,bC,T> res;
+//	res.fill(0);
+
+//	// compute all resulting cells
+//	for (unsigned int r = 0; r < aR; ++r) {
+//		for (unsigned int c = 0; c < bC; ++c) {
+//			// building inner product
+//			for (unsigned int iI = 0; iI < aCbR;iI++) {
+//				res.at(r,c) += A.at(r,iI) * B.at(iI,c);
+//			}
+//		}
+//	}
+//	return res;
+//}
+
+
 /////////////////////////////////////////////////////////////////////////////
 
-template <unsigned int aR,unsigned int aCbR, unsigned int bC, typename T>
-matrix_<aR,bC,T> static inline
-mul(const matrix_<aR,aCbR,T>& A, const matrix_<aCbR,bC,T>& B)
-{
-	// aC == bR
-	// set all null
-	matrix_<aR,bC,T> res;
-	res.fill(0);
-
-	// compute all resulting cells
-	for (unsigned int r = 0; r < aR; ++r) {
-		for (unsigned int c = 0; c < bC; ++c) {
-			// building inner product
-			for (unsigned int iI = 0; iI < aCbR;iI++) {
-				res.at(r,c) += A.at(r,iI) * B.at(iI,c);
-			}
-		}
-	}
-	return res;
-}
 
 
 
@@ -206,7 +235,7 @@ mul(const matrix_<aR,aCbR,T>& A, const matrix_<aCbR,bC,T>& B)
 template <unsigned int R, unsigned int C,typename T>
 matrix_<R,C,T>& matrix_<R,C,T>::operator *= (const matrix_& rhs)
 {
-	*this = mul(*this,rhs);
+    *this = mul(rhs);
 	return *this;
 }
 
diff --git a/src/core/include/pw/core/matrixbase.hpp b/src/core/include/pw/core/matrixbase.hpp
index 327a88e..85608ec 100644
--- a/src/core/include/pw/core/matrixbase.hpp
+++ b/src/core/include/pw/core/matrixbase.hpp
@@ -23,6 +23,9 @@
 #ifndef PW_CORE_MATRIXBASE_HPP
 #define PW_CORE_MATRIXBASE_HPP
 
+
+#include <initializer_list>
+
 namespace pw {
 
 /**
@@ -36,6 +39,9 @@ public:
     typedef unsigned int size_type;
 
 
+    matrixbase() {}
+
+
 	//! assignment constructor
     explicit matrixbase(int rows, int cols,T* ptr,bool row_major,int data_offset = 0)
         : _data(ptr)
@@ -47,6 +53,11 @@ public:
 	{
 	}
 
+//    matrixbase(std::initializer_list<T> il)
+//    {
+//        for (int i = 0;i < il.size();i++) this->at(i) = il[i];
+//    }
+
     inline const T& get_element(int e) const { return this->at(e); }
     inline void set_element(int e,const T &v) { this->at(e) = v; }
 
diff --git a/src/core/include/pw/core/mesh.hpp b/src/core/include/pw/core/mesh.hpp
index e2b5852..7b85d57 100644
--- a/src/core/include/pw/core/mesh.hpp
+++ b/src/core/include/pw/core/mesh.hpp
@@ -51,6 +51,8 @@ public:
 	const indexarray_t& indices() const { return _indices; }
 	const vertex3array_t& vertices() const { return _vertices; }
 
+    void apply(const matrix4x4& m);
+
 	void reset();
 
 protected:
diff --git a/src/core/include/pw/core/rect.hpp b/src/core/include/pw/core/rect.hpp
index 8c91b54..779626f 100644
--- a/src/core/include/pw/core/rect.hpp
+++ b/src/core/include/pw/core/rect.hpp
@@ -38,7 +38,7 @@ struct rect_ {
 
 	rect_(point_<T_> const & p,size_<T_> const & s) : size(s), position(p) {}
 
-    bool contains(const point_<T_>& p)
+    bool contains(const point_<T_>& p) const
     {
         return p.x >= position.x && p.x <= position.x + size.width &&
                 p.y >= position.y && p.y <= position.y + size.height;
diff --git a/src/core/include/pw/core/vector.hpp b/src/core/include/pw/core/vector.hpp
index 9875df1..bd1d2a7 100644
--- a/src/core/include/pw/core/vector.hpp
+++ b/src/core/include/pw/core/vector.hpp
@@ -98,8 +98,8 @@ public:
     T& z() { return (*this)(2); }
 
 
-	const vector_<4,T> project(const T& w) const {
-		return vector_<4,T>(x(),y(),z(),w);
+    vector_<4,T> project(const T& w) const {
+        return vector_<4,T>({ x(),y(),z(),w } );
     }
 
     const vector_<2,T> unproject() const {
diff --git a/src/core/src/mesh.cpp b/src/core/src/mesh.cpp
index 1423211..7e69764 100644
--- a/src/core/src/mesh.cpp
+++ b/src/core/src/mesh.cpp
@@ -3,6 +3,17 @@
 
 namespace pw {
 
+void mesh::apply(const matrix4x4 &m)
+{
+    for (auto &v : _vertices)
+    {
+//        v = m * v.project(1);
+
+        auto vh = v.project(1);
+        m.mul(vh);
+    }
+}
+
 
 
 }
diff --git a/src/core/src/timer.cpp b/src/core/src/timer.cpp
index 16ae81e..f6c5c44 100644
--- a/src/core/src/timer.cpp
+++ b/src/core/src/timer.cpp
@@ -24,8 +24,6 @@
 
 namespace pw {
 
-static timer global_timer;
-
 timer::timer()
 {
     reset();
@@ -48,6 +46,7 @@ double timer::elapsed() const
 
 double timer::now()
 {
+    static timer global_timer;
     return global_timer.elapsed();
 }
 
diff --git a/src/scripting/src/script_system.cpp b/src/scripting/src/script_system.cpp
index 96d81b8..bbc45cc 100644
--- a/src/scripting/src/script_system.cpp
+++ b/src/scripting/src/script_system.cpp
@@ -17,7 +17,8 @@ void script_system::load(sol::table &ns)
                             "size",sol::property(&window::size,&window::set_size),
                             "client_size",sol::readonly_property(&window::client_size),
                             "position",sol::property(&window::position,&window::set_position),
-                            "fullscreen",sol::property(&window::fullscreen,&window::set_fullscreen)
+                            "fullscreen",sol::property(&window::fullscreen,&window::set_fullscreen),
+                            "visible",sol::property(&window::visible,&window::set_visible)
                             );
 
 
diff --git a/src/scripts/demos/simple_000.lua b/src/scripts/demos/simple_000.lua
index 8fea86d..2145f44 100644
--- a/src/scripts/demos/simple_000.lua
+++ b/src/scripts/demos/simple_000.lua
@@ -66,6 +66,7 @@ end
 --n_1:add_child()
 
 local w = pw.window.new()
+w.visible = false
 
 -- set title
 w.title = "pixwerx 0.1"
@@ -75,6 +76,8 @@ w.size = pw.size.new(800,600)
 -- move window
 w.position = pw.point.new(100,100)
 
+print("client size after resize: ",w.client_size.width,w.client_size.height)
+
 
 local pl = pw.pipeline.new()
 if pl:create(w.client_size) then
@@ -83,12 +86,11 @@ else
     print("pipeline failed")
 end
 
-
--- setup a lua callback function
+-- setup a lua callback function as callback
 w.on_update = function(self)
-
     pl:draw()
     -- print("test on update",w.position.x,w.position.y,pw.timer.now)
+
 end
 
 local ds = pw.display:all()
@@ -98,8 +100,9 @@ end
 
 local t = pw.timer.new()
 
-while w:update()
-do
+w.visible = true
+
+while w:update() do
     -- somehow works
     if (pw.input.get().input_string == 'f') then
         w.fullscreen = not w.fullscreen
@@ -109,7 +112,7 @@ do
     if (pw.input:get().mouse_button == 1) then
         print("elapsed",t.elapsed)
             t:reset()
-        print(pw.input:get().mouse_position.x,pw.input:get().mouse_position.y)
+        print(pw.input:get().mouse_position.x,pw.input:get().mouse_position.y,w.client_size.width,w.client_size.height)
     end
 
     -- print("update")
diff --git a/src/system/include/pw/system/input.hpp b/src/system/include/pw/system/input.hpp
index 337f1b4..6eeddcc 100644
--- a/src/system/include/pw/system/input.hpp
+++ b/src/system/include/pw/system/input.hpp
@@ -40,6 +40,9 @@ private:
 	int _mouse_button;
     bool _mouse_pressed;
 
+    int _key_code;
+    bool _key_pressed;
+
 	std::string _input_string;
 
 
diff --git a/src/system/include/pw/system/window.hpp b/src/system/include/pw/system/window.hpp
index 1c20213..0a9d585 100644
--- a/src/system/include/pw/system/window.hpp
+++ b/src/system/include/pw/system/window.hpp
@@ -35,6 +35,8 @@ public:
 
     void set_on_update(on_update_t f) { _on_update = f; }
 
+    bool visible() const;
+    void set_visible(bool is_visible);
 protected:
 
     on_update_t _on_update;
diff --git a/src/system/src/window.cpp b/src/system/src/window.cpp
index e9fea3e..e8a50d9 100644
--- a/src/system/src/window.cpp
+++ b/src/system/src/window.cpp
@@ -70,12 +70,15 @@ struct window::impl {
 
     static void cursor_pos_callback(GLFWwindow* window, double xpos, double ypos)
     {
-        input::get()._mouse_position = point(xpos,ypos);
+        input::get()._mouse_position = pointd(xpos,ypos).cast<float>();
     }
 
     static void key_callback(GLFWwindow *window,int key, int scancode, int action, int mods)
     {
-        std::cout << __FUNCTION__ << std::endl;
+        input::get()._key_code = scancode;
+        input::get()._key_pressed = action;
+        // action 0,1,2
+//        std::cout << __FUNCTION__ << action <<  std::endl;
     }
 
     //    static void character_callback(GLFWwindow* window, unsigned int codepoint)
@@ -167,7 +170,7 @@ struct window::impl {
 
         glfwSetWindowUserPointer(_window,this);
 
-        glfwSetFramebufferSizeCallback(_window, window::impl::framebuffer_size_callback);
+        //glfwSetFramebufferSizeCallback(_window, window::impl::framebuffer_size_callback);
         glfwSetKeyCallback(_window, window::impl::key_callback);
         //        glfwSetCharCallback(_window, character_callback);
         glfwSetCharModsCallback(_window, charmods_callback);
@@ -200,13 +203,6 @@ struct window::impl {
 
             _parent._on_update(_parent);
 
-
-            // do other stuff
-#if 0
-            glClearColor(1,0,0,1);
-            glClear(GL_COLOR_BUFFER_BIT);
-#endif
-
             glfwSwapBuffers(_window);
 
             return true;
@@ -280,6 +276,14 @@ struct window::impl {
     bool fullscreen() const {
         return glfwGetWindowMonitor(_window) != nullptr;
     }
+
+    void set_visible(bool show) {
+        (show) ? glfwShowWindow(_window) : glfwHideWindow(_window);
+    }
+
+    bool visible() const {
+        return glfwGetWindowAttrib(_window, GLFW_VISIBLE) > 0;
+    }
 };
 
 
@@ -343,6 +347,15 @@ void window::set_fullscreen(bool use_fullscreen)
     _impl->set_fullscreen(use_fullscreen);
 }
 
+bool window::visible() const
+{
+    return _impl->visible();
+}
+
+void window::set_visible(bool is_visible)
+{
+    _impl->set_visible(is_visible);
+}
 
 
 
diff --git a/src/visual/src/pipeline.cpp b/src/visual/src/pipeline.cpp
index 1ba3956..ced54c3 100644
--- a/src/visual/src/pipeline.cpp
+++ b/src/visual/src/pipeline.cpp
@@ -42,7 +42,7 @@ struct triangle_renderer
         glBindVertexArray(vao);
         glEnableVertexAttribArray(0);
         glBindBuffer(GL_ARRAY_BUFFER, vbo);
-        glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, NULL);
+        glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
 
         const char* vertex_shader =
                 "#version 400\n"
@@ -56,7 +56,7 @@ struct triangle_renderer
                 "#version 400\n"
                 "out vec4 frag_colour;"
                 "void main() {"
-                "  frag_colour = vec4(0.5, 0.0, 0.5, 1.0);"
+                "  frag_colour = vec4(0.1, 0.0, 0.5, 1.0);"
                 "}";
 #if 0
         GLuint vs = glCreateShader(GL_VERTEX_SHADER);
@@ -185,10 +185,13 @@ bool pipeline::impl::create(sizei size)
 void pipeline::impl::draw()
 {
 
+    glClearColor(0,0,0,1);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, _fbo_msaa);
 
-    glClearColor(1,0,0,1);
-    glClear(GL_COLOR_BUFFER_BIT);
+    glClearColor(1,1,1,1);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
     tr.draw();
 
@@ -225,7 +228,12 @@ void pipeline::impl::draw()
                       GL_COLOR_BUFFER_BIT,             // buffer mask
                       GL_LINEAR);                      // scale filter
 
-    debug::d() << _size.width << "x" << _size.height;
+
+
+    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+    glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+
+    // debug::d() << _size.width << "x" << _size.height;
 
 #endif