diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000..586b6b1
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,26 @@
+
+CP := cp
+TARGET := jcad
+MODULES := main gui engine
+export GTKMM_VERSION := 2.4
+export GTKGLEXTMM_VERSION := 1.2
+CXXFLAGS := -O2
+LDFLAGS := `pkg-config --libs gtkmm-$(GTKMM_VERSION)` \
+	`pkg-config --libs gtkglextmm-$(GTKGLEXTMM_VERSION)`
+ARCHIVES := $(foreach module,$(MODULES),$(module)/$(module).a)
+
+all: $(MODULES) $(TARGET)
+
+$(TARGET): $(ARCHIVES)
+	$(CXX) -o $@ $(ARCHIVES) $(LDFLAGS)
+
+%.o: %.cpp
+	$(CXX) -c -o $@ $(CXXFLAGS) $<
+
+.PHONY: $(MODULES)
+$(MODULES):
+	$(MAKE) -C $@
+
+clean:
+	$(RM) -f *.o *.a *~ $(TARGET)
+	for m in $(MODULES); do (cd $$m; $(MAKE) clean ); done
diff --git a/src/engine/Makefile b/src/engine/Makefile
new file mode 100644
index 0000000..544f762
--- /dev/null
+++ b/src/engine/Makefile
@@ -0,0 +1,30 @@
+
+SRCS := Profile.cpp
+MODULES := Profile.o
+TARGET := engine.a
+GTKMM_VERSION := 2.4
+GTKGLEXTMM_VERSION := 1.2
+CPPFLAGS = -I..
+CXXFLAGS = -O2 $(CPPFLAGS) \
+	`pkg-config --cflags gtkmm-$(GTKMM_VERSION)` \
+	`pkg-config --cflags gtkglextmm-$(GTKGLEXTMM_VERSION)`
+DEPS := $(SRCS:.cpp=.d)
+
+all: $(TARGET)
+
+$(TARGET): $(MODULES)
+	$(AR) rcv $@ $?
+
+%.o: %.cpp
+	$(CXX) -c -o $@ $(CXXFLAGS) $<
+
+.PHONY: clean
+clean:
+	$(RM) -f *.o *.d *~ $(TARGET)
+
+%.d: %.cpp
+	@set -e; rm -f $@; \
+		$(CXX) -MM $(CPPFLAGS) $< | \
+		sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' > $@
+
+include $(DEPS)
diff --git a/src/engine/Profile.cpp b/src/engine/Profile.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/src/engine/Profile.h b/src/engine/Profile.h
new file mode 100644
index 0000000..fda59bc
--- /dev/null
+++ b/src/engine/Profile.h
@@ -0,0 +1,12 @@
+
+#ifndef PROFILE_H
+#define PROFILE_H
+
+class Profile
+{
+	public:
+	protected:
+};
+
+#endif
+
diff --git a/src/gui/Displayer.cpp b/src/gui/Displayer.cpp
new file mode 100644
index 0000000..7e54c0e
--- /dev/null
+++ b/src/gui/Displayer.cpp
@@ -0,0 +1,81 @@
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include <gdkmm/cursor.h>
+#include "ProfileDisplayer.h"
+#include "PartDisplayer.h"
+#include "Displayer.h"
+
+Displayer::Displayer(const Glib::RefPtr<const Gdk::GL::Config> & config)
+	: Gtk::GL::DrawingArea(config)
+{
+	set_gl_capability(config);
+	set_events(Gdk::POINTER_MOTION_MASK
+			 | Gdk::BUTTON_PRESS_MASK
+			 | Gdk::BUTTON_RELEASE_MASK
+			 | Gdk::SCROLL_MASK);
+}
+
+Displayer::~Displayer()
+{
+}
+
+bool Displayer::draw()
+{
+	return false;
+}
+
+bool Displayer::on_motion_notify_event(GdkEventMotion * event)
+{
+	get_pointer(m_x, m_y);
+	return true;
+}
+
+bool Displayer::on_button_press_event(GdkEventButton * event)
+{
+}
+
+bool Displayer::on_button_release_event(GdkEventButton * event)
+{
+}
+
+bool Displayer::on_scroll_event(GdkEventScroll * event)
+{
+}
+
+void Displayer::on_realize()
+{
+	Gtk::GL::DrawingArea::on_realize();
+
+	Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window();
+	glwindow->get_window()->set_cursor(Gdk::Cursor(Gdk::CROSSHAIR));
+
+	if (!glwindow->gl_begin(get_gl_context()))
+		return;
+
+	glViewport(0, 0, get_width(), get_height());
+
+	glwindow->gl_end();
+}
+
+/*
+ * called on widget resizes
+ */
+bool Displayer::on_configure_event(GdkEventConfigure * event)
+{
+	Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window();
+
+	if (!glwindow->gl_begin(get_gl_context()))
+		return false;
+
+	glViewport(0, 0, get_width(), get_height());
+
+	glwindow->gl_end();
+
+	return true;
+}
+
+bool Displayer::on_expose_event(GdkEventExpose * event)
+{
+	return draw();
+}
diff --git a/src/gui/Displayer.h b/src/gui/Displayer.h
new file mode 100644
index 0000000..2460cf0
--- /dev/null
+++ b/src/gui/Displayer.h
@@ -0,0 +1,29 @@
+
+#ifndef GLWIDGET_H
+#define GLWIDGET_H
+
+#include <gtkmm/gl/drawingarea.h>
+
+class Displayer : public Gtk::GL::DrawingArea
+{
+	public:
+		Displayer(const Glib::RefPtr<const Gdk::GL::Config> & config);
+		~Displayer();
+
+	protected:
+		int m_x, m_y;
+
+		virtual bool draw();
+		virtual void on_realize();
+		virtual bool on_configure_event(GdkEventConfigure * event);
+		virtual bool on_expose_event(GdkEventExpose * event);
+
+		/* signal handlers */
+		virtual bool on_motion_notify_event(GdkEventMotion * event);
+		virtual bool on_button_press_event(GdkEventButton * event);
+		virtual bool on_button_release_event(GdkEventButton * event);
+		virtual bool on_scroll_event(GdkEventScroll * event);
+};
+
+#endif
+
diff --git a/src/gui/GUI.cpp b/src/gui/GUI.cpp
new file mode 100644
index 0000000..6fffa9c
--- /dev/null
+++ b/src/gui/GUI.cpp
@@ -0,0 +1,35 @@
+
+#include "GUI.h"
+#include "MainWindow.h"
+#include <gtkmm/main.h>
+#include <gtkglmm.h>
+#include <iostream>
+
+int GUI::start(int argc, char * argv[])
+{
+	Gtk::Main gtkmain(argc, argv);
+	Gtk::GL::init(argc, argv);
+
+	Glib::RefPtr<Gdk::GL::Config> glconfig;
+	glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB |
+									   Gdk::GL::MODE_DEPTH |
+									   Gdk::GL::MODE_DOUBLE);
+
+	if (!glconfig)
+	{
+		std::cerr << "Could not create double-buffered GL visual"
+			      << "Trying single-buffered visual." << std::endl;
+
+		glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB |
+										   Gdk::GL::MODE_DEPTH);
+
+		if (!glconfig)
+		{
+			std::cerr << "Cannot create OpenGL context!" << std::endl;
+			return -1;
+		}
+	}
+
+	MainWindow mw(glconfig);
+	Gtk::Main::run(mw);
+}
diff --git a/src/gui/GUI.h b/src/gui/GUI.h
new file mode 100644
index 0000000..a0d95aa
--- /dev/null
+++ b/src/gui/GUI.h
@@ -0,0 +1,12 @@
+
+#ifndef GUI_H
+#define GUI_H
+
+class GUI
+{
+	public:
+		int start(int argc, char * argv[]);
+};
+
+#endif
+
diff --git a/src/gui/MainWindow.cpp b/src/gui/MainWindow.cpp
new file mode 100644
index 0000000..c995ab5
--- /dev/null
+++ b/src/gui/MainWindow.cpp
@@ -0,0 +1,54 @@
+
+#include "MainWindow.h"
+#include <gtkmm/action.h>
+#include <gtkmm/stock.h>
+#include <gtkmm/main.h>
+#include "PartDisplayer.h"
+
+MainWindow::MainWindow(const Glib::RefPtr<Gdk::GL::Config> & config)
+	: m_displayer(new PartDisplayer(config))
+{
+	set_default_size(500, 500);
+
+	m_refActionGroup = Gtk::ActionGroup::create();
+	m_refActionGroup->add(Gtk::Action::create("FileMenu", "_File"));
+	m_refActionGroup->add(Gtk::Action::create("New", Gtk::Stock::NEW),
+		sigc::mem_fun(*this, &MainWindow::on_action_new));
+	m_refActionGroup->add(Gtk::Action::create("Quit", Gtk::Stock::QUIT),
+		sigc::mem_fun(*this, &MainWindow::on_action_quit));
+	Glib::RefPtr<Gtk::UIManager> m_refUIManager = Gtk::UIManager::create();
+	m_refUIManager->insert_action_group(m_refActionGroup);
+	add_accel_group(m_refUIManager->get_accel_group());
+	Glib::ustring ui_info =
+		"<ui>"
+		"  <menubar name='MenuBar'>"
+		"    <menu action='FileMenu'>"
+		"      <menuitem action='New' />"
+		"      <separator />"
+		"      <menuitem action='Quit' />"
+		"    </menu>"
+		"  </menubar>"
+		"  <toolbar name='ToolBar'>"
+		"    <toolitem action='New' />"
+		"  </toolbar>"
+		"</ui>";
+	m_refUIManager->add_ui_from_string(ui_info);
+
+	m_VBox.pack_start(*m_refUIManager->get_widget("/MenuBar"),
+		Gtk::PACK_SHRINK);
+	m_VBox.pack_start(*m_refUIManager->get_widget("/ToolBar"),
+		Gtk::PACK_SHRINK);
+	m_VBox.pack_start(*m_displayer);
+	m_VBox.pack_start(m_statusBar, Gtk::PACK_SHRINK);
+	add(m_VBox);
+	show_all();
+}
+
+void MainWindow::on_action_new()
+{
+}
+
+void MainWindow::on_action_quit()
+{
+	Gtk::Main::quit();
+}
diff --git a/src/gui/MainWindow.h b/src/gui/MainWindow.h
new file mode 100644
index 0000000..a6502e3
--- /dev/null
+++ b/src/gui/MainWindow.h
@@ -0,0 +1,29 @@
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <gtkmm/window.h>
+#include <gtkmm/menubar.h>
+#include <gtkmm/box.h>
+#include <gtkmm/actiongroup.h>
+#include <gtkmm/uimanager.h>
+#include <gtkmm/statusbar.h>
+#include "Displayer.h"
+
+class MainWindow : public Gtk::Window
+{
+	public:
+		MainWindow(const Glib::RefPtr<Gdk::GL::Config> & config);
+
+	protected:
+		Glib::RefPtr<Gtk::UIManager>	m_refUIManager;
+		Glib::RefPtr<Gtk::ActionGroup>	m_refActionGroup;
+		Displayer *						m_displayer;
+		Gtk::VBox						m_VBox;
+		Gtk::Statusbar					m_statusBar;
+
+		void			on_action_new();
+		void			on_action_quit();
+};
+
+#endif
diff --git a/src/gui/Makefile b/src/gui/Makefile
new file mode 100644
index 0000000..ccf3227
--- /dev/null
+++ b/src/gui/Makefile
@@ -0,0 +1,30 @@
+
+SRCS := MainWindow.cpp GUI.cpp Displayer.cpp ProfileDisplayer.cpp PartDisplayer.cpp
+MODULES := MainWindow.o GUI.o Displayer.o ProfileDisplayer.o PartDisplayer.o
+TARGET := gui.a
+GTKMM_VERSION := 2.4
+GTKGLEXTMM_VERSION := 1.2
+CPPFLAGS = -I..
+CXXFLAGS = -O2 $(CPPFLAGS) \
+	`pkg-config --cflags gtkmm-$(GTKMM_VERSION)` \
+	`pkg-config --cflags gtkglextmm-$(GTKGLEXTMM_VERSION)`
+DEPS := $(SRCS:.cpp=.d)
+
+all: $(TARGET)
+
+$(TARGET): $(MODULES)
+	$(AR) rcv $@ $?
+
+%.o: %.cpp
+	$(CXX) -c -o $@ $(CXXFLAGS) $<
+
+.PHONY: clean
+clean:
+	$(RM) -f *.o *.d *~ $(TARGET)
+
+%.d: %.cpp
+	@set -e; rm -f $@; \
+		$(CXX) -MM $(CPPFLAGS) $< | \
+		sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' > $@
+
+include $(DEPS)
diff --git a/src/gui/PartDisplayer.cpp b/src/gui/PartDisplayer.cpp
new file mode 100644
index 0000000..ab77a77
--- /dev/null
+++ b/src/gui/PartDisplayer.cpp
@@ -0,0 +1,73 @@
+
+#include "PartDisplayer.h"
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+PartDisplayer::PartDisplayer(const Glib::RefPtr<const Gdk::GL::Config> & config)
+	: Displayer(config)
+{
+}
+
+PartDisplayer::~PartDisplayer()
+{
+}
+
+bool PartDisplayer::draw()
+{
+	Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window();
+	if (!glwindow->gl_begin(get_gl_context()))
+		return false;
+
+	glClearColor(0.1, 0.6, 1.0, 1.0);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(-3, 3, -3, 3, 0.0001, 100000);
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	gluLookAt(10, -10, 10,
+			  0, 0, 0,
+			  0, 0, 1);
+	drawPlane();
+	glPushMatrix();
+	glRotatef(90, 1, 0, 0);
+	drawPlane();
+	glPopMatrix();
+	glRotatef(90, 0, 0, 1);
+	glRotatef(90, 1, 0, 0);
+	drawPlane();
+
+	if (glwindow->is_double_buffered())
+		glwindow->swap_buffers();
+	else
+		glFlush();
+	return true;
+}
+
+void PartDisplayer::drawPlane()
+{
+	glColor4f(0.1, 0.8, 1.0, 0.3);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	glEnable(GL_BLEND);
+	glBegin(GL_QUADS);
+		glVertex2f(1, 1);
+		glVertex2f(-1, 1);
+		glVertex2f(-1, -1);
+		glVertex2f(1, -1);
+	glEnd();
+	glEnable(GL_LINE_SMOOTH);
+	glColor4f(0.0, 0.15, 0.3, 1.0);
+	glBegin(GL_LINE_LOOP);
+		glVertex2f(1, 1);
+		glVertex2f(-1, 1);
+		glVertex2f(-1, -1);
+		glVertex2f(1, -1);
+	glEnd();
+	glBegin(GL_LINE_STRIP);
+		glVertex2f(0.6, -1.0);
+		glVertex2f(0.6, -0.9);
+		glVertex2f(1.0, -0.9);
+	glEnd();
+	glDisable(GL_LINE_SMOOTH);
+	glDisable(GL_BLEND);
+}
diff --git a/src/gui/PartDisplayer.h b/src/gui/PartDisplayer.h
new file mode 100644
index 0000000..13ac77a
--- /dev/null
+++ b/src/gui/PartDisplayer.h
@@ -0,0 +1,19 @@
+
+#ifndef PARTDISPLAYER_H
+#define PARTDISPLAYER_H
+
+#include "Displayer.h"
+
+class PartDisplayer : public Displayer
+{
+	public:
+		PartDisplayer(const Glib::RefPtr<const Gdk::GL::Config> & config);
+		~PartDisplayer();
+		bool draw();
+
+	protected:
+		void drawPlane();
+};
+
+#endif
+
diff --git a/src/gui/ProfileDisplayer.cpp b/src/gui/ProfileDisplayer.cpp
new file mode 100644
index 0000000..f7c2cb9
--- /dev/null
+++ b/src/gui/ProfileDisplayer.cpp
@@ -0,0 +1,30 @@
+
+#include "ProfileDisplayer.h"
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+ProfileDisplayer::ProfileDisplayer(const Glib::RefPtr<const Gdk::GL::Config> & config)
+	: Displayer(config)
+{
+}
+
+ProfileDisplayer::~ProfileDisplayer()
+{
+}
+
+bool ProfileDisplayer::draw()
+{
+	Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window();
+	if (!glwindow->gl_begin(get_gl_context()))
+		return false;
+
+	glClearColor(0.1, 0.6, 1.0, 1.0);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	if (glwindow->is_double_buffered())
+		glwindow->swap_buffers();
+	else
+		glFlush();
+	return true;
+}
+
diff --git a/src/gui/ProfileDisplayer.h b/src/gui/ProfileDisplayer.h
new file mode 100644
index 0000000..5367e95
--- /dev/null
+++ b/src/gui/ProfileDisplayer.h
@@ -0,0 +1,18 @@
+
+#ifndef PROFILEDISPLAYER_H
+#define PROFILEDISPLAYER_H
+
+#include "Displayer.h"
+
+class ProfileDisplayer : public Displayer
+{
+	public:
+		ProfileDisplayer(const Glib::RefPtr<const Gdk::GL::Config> & config);
+		~ProfileDisplayer();
+		bool draw();
+
+	protected:
+};
+
+#endif
+
diff --git a/src/main/Makefile b/src/main/Makefile
new file mode 100644
index 0000000..2a3d888
--- /dev/null
+++ b/src/main/Makefile
@@ -0,0 +1,26 @@
+
+SRCS := main.cpp
+MODULES := main.o
+TARGET := main.a
+DEPS := $(SRCS:.cpp=.d)
+CPPFLAGS := -I..
+CXXFLAGS := -O2 $(CPPFLAGS)
+
+all: $(TARGET)
+
+$(TARGET): $(MODULES)
+	$(AR) rcv $@ $?
+
+%.o: %.cpp
+	$(CXX) -c -o $@ $(CXXFLAGS) $<
+
+.PHONY: clean
+clean:
+	$(RM) -f *.o *.d *~ $(TARGET)
+
+%.d: %.cpp
+	@set -e; rm -f $@; \
+		$(CXX) -MM $(CPPFLAGS) $< | \
+		sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' > $@
+
+include $(DEPS)
diff --git a/src/main/main.cpp b/src/main/main.cpp
new file mode 100644
index 0000000..1333406
--- /dev/null
+++ b/src/main/main.cpp
@@ -0,0 +1,9 @@
+
+#include "gui/GUI.h"
+
+int main(int argc, char * argv[])
+{
+	GUI theGUI;
+	theGUI.start(argc, argv);
+	return 0;
+}