diff --git a/Engine.cc b/Engine.cc
index 519e900..6846aba 100644
--- a/Engine.cc
+++ b/Engine.cc
@@ -613,6 +613,27 @@ Engine::Object::Object(bool is_static, OdeWorld & world, GLuint dl, float scale)
     m_is_visible = true;
     m_scale = scale;
     m_is_scaled = ! (fabs(scale - 1.0) < 0.0001);
+    m_is_managed = false;
+}
+
+Engine::Object::Object(bool is_static, OdeWorld & world,
+                        OdeWorld::GeomType geom_type,
+                        refptr< std::vector<float> > args)
+{
+    m_is_visible = true;
+    m_scale = 1.0f;
+    m_is_scaled = false;
+    m_display_list = -1;
+    m_display_list_refcnt = NULL;
+    m_ode_object = world.createObject(
+            geom_type == OdeWorld::PLANE ? false : is_static,
+            m_scale);
+    m_is_managed = true;
+    m_geom_type = geom_type;
+    m_args = args;
+    for (int i = 0; i < 4; i++)
+        m_color[i] = 1.0f;
+    createManagedObject();
 }
 
 Engine::Object::Object(const Engine::Object & orig)
@@ -621,9 +642,15 @@ Engine::Object::Object(const Engine::Object & orig)
     m_ode_object = new OdeWorld::Object(*orig.m_ode_object);
     m_display_list = orig.m_display_list;
     m_display_list_refcnt = orig.m_display_list_refcnt;
-    (*m_display_list_refcnt)++;
+    if (m_display_list_refcnt != NULL)
+        (*m_display_list_refcnt)++;
     m_scale = orig.m_scale;
     m_is_scaled = orig.m_is_scaled;
+    m_is_managed = orig.m_is_managed;
+    m_geom_type = orig.m_geom_type;
+    m_args = orig.m_args;
+    for (int i = 0; i < 4; i++)
+        m_color[i] = orig.m_color[i];
 }
 
 Engine::Object::~Object()
@@ -638,6 +665,80 @@ Engine::Object::~Object()
     }
 }
 
+void Engine::Object::createManagedObject()
+{
+    switch (m_geom_type)
+    {
+        case OdeWorld::CUBE:
+            m_ode_object->addCube(m_args);
+            break;
+        case OdeWorld::SPHERE:
+            m_ode_object->addSphere(m_args);
+            break;
+        case OdeWorld::PLANE:
+            m_ode_object->addPlane(m_args);
+            break;
+        case OdeWorld::CYLINDER:
+            m_ode_object->addCylinder(m_args);
+            break;
+        case OdeWorld::CCYLINDER:
+            m_ode_object->addCCylinder(m_args);
+            break;
+    }
+    m_ode_object->finalize();
+    render();
+}
+
+/* render a managed object */
+void Engine::Object::render()
+{
+    bool valid = false;
+    switch (m_geom_type)
+    {
+        case OdeWorld::CUBE:
+            if (m_args->size() >= 3)    valid = true;
+            break;
+        case OdeWorld::SPHERE:
+            if (m_args->size() == 4)    valid = true;
+            break;
+        case OdeWorld::PLANE:
+            if (m_args->size() == 6)    valid = true;
+            break;
+        case OdeWorld::CYLINDER:
+            if (m_args->size() == 8)    valid = true;
+            break;
+        case OdeWorld::CCYLINDER:
+            if (m_args->size() == 8)    valid = true;
+            break;
+    }
+    if (!valid)
+        return;
+    m_display_list = glGenLists(1);
+    glNewList(m_display_list, GL_COMPILE);
+    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, m_color);
+    GLUquadric * quad = gluNewQuadric();
+    /* TODO: finish */
+    switch (m_geom_type)
+    {
+        case OdeWorld::CUBE:
+            break;
+        case OdeWorld::SPHERE:
+            gluSphere(quad, (*m_args)[0], 16, 8);
+            break;
+        case OdeWorld::PLANE:
+            break;
+        case OdeWorld::CYLINDER:
+            glPushMatrix();
+            glTranslatef(0, 0, -(*m_args)[1] / 2.0);
+            gluCylinder(quad, (*m_args)[0], (*m_args)[0], (*m_args)[1], 12, 1);
+            glPopMatrix();
+            break;
+        case OdeWorld::CCYLINDER:
+            break;
+    }
+    glEndList();
+}
+
 void Engine::Object::loadPhy(const FileLoader::Path & path)
 {
     FileLoader::Buffer buff = g_engine->m_fileLoader->load(path);
@@ -664,7 +765,7 @@ void Engine::Object::loadPhy(const FileLoader::Path & path)
             continue;
         string name = line.substr(pos + 1, pos2 - pos - 1);
         pos = pos2 + 1;
-        vector<float> args;
+        refptr< vector<float> > args = new vector<float>();
         for (;;)
         {
             pos = line.find_first_not_of(WHITESPACE, pos);
@@ -673,7 +774,7 @@ void Engine::Object::loadPhy(const FileLoader::Path & path)
             pos2 = line.find_first_of(WHITESPACE, pos);
             string n = line.substr(pos, pos2 - pos);
             float f = atof(n.c_str());
-            args.push_back(f);
+            args->push_back(f);
             if (pos2 == string::npos)
                 break;
             pos = pos2 + 1;
diff --git a/Engine.h b/Engine.h
index d58d405..0d4e2e7 100644
--- a/Engine.h
+++ b/Engine.h
@@ -23,7 +23,7 @@ class Engine
                         float scale = 1.0f);
                 Object(bool is_static, OdeWorld & world,
                         OdeWorld::GeomType geom_type,
-                        const std::vector<float> & args);
+                        refptr< std::vector<float> > args);
                 Object(const Object & orig);
                 ~Object();
 
@@ -62,14 +62,23 @@ class Engine
                 void draw();
 
             protected:
+                void createManagedObject();
+                void render();
+
                 OdeWorld::Object * m_ode_object;
                 GLuint m_display_list;
-                int * m_display_list_refcnt;
                 bool m_is_visible;
                 float m_scale;
                 bool m_is_scaled;
+                bool m_is_managed;
+
+                /* for "pre-loaded" objects */
+                int * m_display_list_refcnt;
+
+                /* for "managed" objects */
                 OdeWorld::GeomType  m_geom_type;
                 refptr< std::vector<float> > m_args;
+                float m_color[4];
         };
 
         class EngineFileLoader : public FileLoader