diff --git a/callback.c b/callback.c
index 07b6f24..122fb24 100644
--- a/callback.c
+++ b/callback.c
@@ -5,6 +5,8 @@
 #include "contain.h"
 #include "texts.h"
 #include "in_depth.h"
+#include "parsing.h"
+#include "graph_area.h"
 
 /******************************************************************************/
 /*                M A I N   W I N D O W   A C T I V A T I O N                 */
@@ -18,6 +20,26 @@ void ui_main_window (GtkApplication *self, gpointer user_data)
   gtk_window_present (GTK_WINDOW (main_window));
 }
 
+void ui_send_internal_notification(const char *message)
+{
+  /*  Ignored  (2024-06-06)  because I don't know how to get "main_window" easily
+
+    if (window->toast_revealer == NULL) {
+        g_printerr("Can't find self->toast_overlay !\n");
+        return;
+    }
+
+    if (window->toast_text == NULL) {
+        g_printerr("Can't find self->toast_overlay !\n");
+        return;
+    }
+
+    gtk_label_set_label(window->toast_text, message);
+    gtk_revealer_set_reveal_child(window->toast_revealer, true);
+  */
+    g_printerr("%s\n", message);
+}
+
 /******************************************************************************/
 /*                                T R E E                                     */
 /******************************************************************************/
@@ -40,6 +62,74 @@ void on_bind_user_tree_factory (GtkSignalListItemFactory *factory, GObject* obje
   gtk_widget_set_margin_start(expander, gtk_tree_list_row_get_depth(row) * 20);
 }
 
+/******************************************************************************/
+/*                              G L  A R E A                                  */
+/******************************************************************************/
+gboolean on_glarea_render(GtkGLArea *area, GdkGLContext *context)
+{
+    // Check if the widget is a glarea
+    if(gtk_gl_area_get_error(area) != NULL) {
+//////////////////////////        ui_send_internal_notification("An OpenGL error occured !");
+        return false;
+    }
+
+//////////////////////////    if (ui_render_stack(gtk_widget_get_parent(GTK_WIDGET(area))) == false) {
+//////////////////////////        ui_send_internal_notification("Failed to render corresponding graphic stack !");
+//////////////////////////        return false;
+//////////////////////////    }
+
+    return true;
+}
+
+
+/* We need to set up our state when we realize the GtkGLArea widget */
+void on_glarea_realize(GtkWidget *widget)
+{
+    GError *internal_error = NULL;
+
+    // Make the GL context current to be able to call the GL API
+    gtk_gl_area_make_current(GTK_GL_AREA(widget));
+
+    // Check if the widget is a glarea
+    if(gtk_gl_area_get_error(GTK_GL_AREA(widget)) != NULL) {
+        ui_send_internal_notification("An OpenGL error occured !");
+        return;
+    }
+
+    // Link graphical stack to widget
+    if (ui_init_graphic_stack(gtk_widget_get_parent(widget),
+                              internal_error) == false) {
+        ui_send_internal_notification(
+            "Failed to link the graphic stack to widgets !");
+        return;
+    }
+
+    gtk_gl_area_set_auto_render(GTK_GL_AREA(widget), true);
+}
+
+/* We should tear down the state when unrealizing */
+void on_glarea_unrealize(GtkWidget *widget)
+{
+    GError *internal_error = NULL;
+
+    // Make the GL context current to be able to call the GL API
+    gtk_gl_area_make_current(GTK_GL_AREA(widget));
+
+    // Check if the widget is a glarea
+    if(gtk_gl_area_get_error(GTK_GL_AREA(widget)) != NULL) {
+        ui_send_internal_notification("An OpenGL error occured !");
+        return;
+    }
+
+    // Destroy graphic stack
+    if (ui_shutdown_graphic_stack(gtk_widget_get_parent(widget),
+                                  internal_error) == false) {
+        ui_send_internal_notification(
+            "Failed to shutdown the graphic stack !");
+        return;
+    }
+}
+
 /******************************************************************************/
 /*                             B U T T O N S                                  */
 /******************************************************************************/
diff --git a/callback.d b/callback.d
new file mode 100644
index 0000000..72ca2c2
--- /dev/null
+++ b/callback.d
@@ -0,0 +1,5 @@
+callback.o: callback.c tree.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib.h \
+ display.h contain.h texts.h in_depth.h parsing.h base.h graph_area.h \
+ /gnu/store/0gxl8awg16qysdmxsflwnz0gyynrgs99-mesa-24.0.4/include/GL/glext.h \
+ /gnu/store/0gxl8awg16qysdmxsflwnz0gyynrgs99-mesa-24.0.4/include/KHR/khrplatform.h
diff --git a/callback.h b/callback.h
index 3b19d68..3fb290e 100644
--- a/callback.h
+++ b/callback.h
@@ -2,10 +2,15 @@
 
 
 void ui_main_window (GtkApplication *app, gpointer user_data);
+void ui_send_internal_notification(const char *message);
 
 void on_user_tree_expander_toggled (GtkExpander *expander, gpointer user_data);
 void on_bind_user_tree_factory (GtkSignalListItemFactory *factory, GObject* object, gpointer user_data);
 
+gboolean on_glarea_render(GtkGLArea *area, GdkGLContext *context);
+void on_glarea_realize(GtkWidget *widget);
+void on_glarea_unrealize(GtkWidget *widget);
+
 void ui_toggle_exec_edit     (GtkWidget *btt_exec_xor_edit, gpointer data);
 void ui_toggle_model_exec    (GtkWidget *btt_run_stop_model_exec, gpointer data);
 
diff --git a/callback.o b/callback.o
new file mode 100644
index 0000000..cd95bd6
Binary files /dev/null and b/callback.o differ
diff --git a/contain.d b/contain.d
new file mode 100644
index 0000000..dbb58bb
--- /dev/null
+++ b/contain.d
@@ -0,0 +1,3 @@
+contain.o: contain.c callback.h display.h tree.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib.h \
+ contain.h texts.h
diff --git a/contain.o b/contain.o
new file mode 100644
index 0000000..d661340
Binary files /dev/null and b/contain.o differ
diff --git a/display.d b/display.d
new file mode 100644
index 0000000..fb49706
--- /dev/null
+++ b/display.d
@@ -0,0 +1,3 @@
+display.o: display.c contain.h tree.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib.h \
+ display.h texts.h
diff --git a/display.o b/display.o
new file mode 100644
index 0000000..2bd4e21
Binary files /dev/null and b/display.o differ
diff --git a/graph_area.c b/graph_area.c
index fb4cdc6..8fe7d66 100644
--- a/graph_area.c
+++ b/graph_area.c
@@ -27,6 +27,7 @@
 
 #include "contain.h"
 #include "graph_area.h"
+#include "callback.h"
 
 struct stack_index_t {
     long stack_id;
@@ -286,9 +287,9 @@ bool ui_setup_glarea(int target_mode, GtkWidget *target_widget)
     //gtk_widget_set_valign(gl_area, GTK_ALIGN_CENTER);
 
     // The main "draw" call for GtkGLArea
-//////////////////////////    g_signal_connect(GTK_GL_AREA(gl_area), "render", G_CALLBACK(on_glarea_render), NULL);
-//////////////////////////    g_signal_connect(gl_area, "realize", G_CALLBACK(on_glarea_realize), NULL);
-//////////////////////////    g_signal_connect(gl_area, "unrealize", G_CALLBACK(on_glarea_unrealize), NULL);
+    g_signal_connect(GTK_GL_AREA(gl_area), "render", G_CALLBACK(on_glarea_render), NULL);
+    g_signal_connect(gl_area, "realize", G_CALLBACK(on_glarea_realize), NULL);
+    g_signal_connect(gl_area, "unrealize", G_CALLBACK(on_glarea_unrealize), NULL);
 
     stack_index[stack_index_size-1].container_widget =
         (void*)target_widget;
diff --git a/graph_area.d b/graph_area.d
new file mode 100644
index 0000000..19fb827
--- /dev/null
+++ b/graph_area.d
@@ -0,0 +1,6 @@
+graph_area.o: graph_area.c \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib.h \
+ contain.h graph_area.h \
+ /gnu/store/0gxl8awg16qysdmxsflwnz0gyynrgs99-mesa-24.0.4/include/GL/glext.h \
+ /gnu/store/0gxl8awg16qysdmxsflwnz0gyynrgs99-mesa-24.0.4/include/KHR/khrplatform.h \
+ base.h callback.h
diff --git a/graph_area.h b/graph_area.h
index 2181922..ccec84e 100644
--- a/graph_area.h
+++ b/graph_area.h
@@ -117,6 +117,9 @@ bool graphics_shutdown(const int stack_id, void *error_buffer);
  */
 bool graphics_init_shaders(const int stack_id);
 
+bool ui_init_graphic_stack(void *container_widget, GError *error_buffer);
+bool ui_shutdown_graphic_stack(void *container_widget, GError *error_buffer);
+
 /* Initializes the buffer of a gl_area
  * Calls according to the user preferences
  * @param   gl_area, ptr to the gl_area widget
diff --git a/graph_area.o b/graph_area.o
new file mode 100644
index 0000000..f058996
Binary files /dev/null and b/graph_area.o differ
diff --git a/graph_stack.c b/graph_stack.c
index 32d9690..df628bb 100644
--- a/graph_stack.c
+++ b/graph_stack.c
@@ -28,6 +28,7 @@
 
 #include "contain.h"
 #include "graph_area.h"
+#include "parsing.h"
 
 #define TEST 0
 
@@ -277,7 +278,7 @@ void graphics_model_setup (const int stack_id)
     stack->arrows_nb = 0;
 
     multiplicity = model_get_multiplicity();
-    g_print("[GRAPH DEBUG] site_multiplicity = %ld\n", multiplicity);
+    g_print("[GRAPH DEBUG] site_multiplicity = %d, density_max = %d\n", multiplicity, density_max);
 
     /*------------------------------------------------------------------------*/
 
@@ -285,10 +286,10 @@ void graphics_model_setup (const int stack_id)
 
     /*------------------------------------------------------------------------*/
 
-    draw_space_ridges_vertex (stack_id, stack->buffer_vertex_size, space_X, space_Y, space_Z);
-    draw_space_ridges_lines (stack_id);
-    draw_grids_on_space_faces_vertex (stack_id, space_X, space_Y, space_Z);
-    draw_grids_on_space_faces_lines (stack_id, stack->buffer_lines_size, space_X, space_Y, space_Z);
+//////////////////////////    draw_space_ridges_vertex (stack_id, stack->buffer_vertex_size, space_X, space_Y, space_Z);
+//////////////////////////    draw_space_ridges_lines (stack_id);
+//////////////////////////    draw_grids_on_space_faces_vertex (stack_id, space_X, space_Y, space_Z);
+//////////////////////////    draw_grids_on_space_faces_lines (stack_id, stack->buffer_lines_size, space_X, space_Y, space_Z);
 
     stack->buffer_vertex_0_arrow = stack->buffer_vertex_size;
     stack->buffer_colors_0_arrow = stack->buffer_colors_size;
@@ -303,7 +304,7 @@ void graphics_model_setup (const int stack_id)
     char state_id[30] = {0};
     struct arrow_t arrow = {0};
 
-    assert(model_get_next_state(&state_id));
+    assert(model_get_next_state((char *)&state_id));
 
     g_print("[GRAPH DEBUG] first state is = %s\n", state_id);
 
@@ -311,7 +312,7 @@ void graphics_model_setup (const int stack_id)
 
     g_print("[GRAPH DEBUG] announced_arrows_nb is = %ld\n", announced_arrows_nb);
 
-    while (model_get_next_arrow(&arrow, &state_id, dimension)) {
+    while (model_get_next_arrow(&arrow, (char *)&state_id, dimension)) {
         g_print("[GRAPH DEBUG] cur arrow has x = %d\n", arrow.x);
 //////////////////////////        stack->arrows_nb = set_arrow (stack_id, stack->arrows_nb, space_X, space_Y, space_Z, arrow.load, arrow.site, arrow.x, arrow.y, arrow.z);
     }
diff --git a/graph_stack.d b/graph_stack.d
new file mode 100644
index 0000000..252928c
--- /dev/null
+++ b/graph_stack.d
@@ -0,0 +1,6 @@
+graph_stack.o: graph_stack.c contain.h graph_area.h \
+ /gnu/store/0gxl8awg16qysdmxsflwnz0gyynrgs99-mesa-24.0.4/include/GL/glext.h \
+ /gnu/store/0gxl8awg16qysdmxsflwnz0gyynrgs99-mesa-24.0.4/include/KHR/khrplatform.h \
+ base.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib.h \
+ parsing.h
diff --git a/graph_stack.o b/graph_stack.o
new file mode 100644
index 0000000..4a3f5c7
Binary files /dev/null and b/graph_stack.o differ
diff --git a/in_depth.d b/in_depth.d
new file mode 100644
index 0000000..cced342
--- /dev/null
+++ b/in_depth.d
@@ -0,0 +1 @@
+in_depth.o: in_depth.c callback.h
diff --git a/in_depth.o b/in_depth.o
new file mode 100644
index 0000000..d78f4ff
Binary files /dev/null and b/in_depth.o differ
diff --git a/init.d b/init.d
new file mode 100644
index 0000000..23f08cd
--- /dev/null
+++ b/init.d
@@ -0,0 +1,91 @@
+init.o: init.c base.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/galloca.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gtypes.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/lib/glib-2.0/include/glibconfig.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gmacros.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gversionmacros.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/glib-visibility.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/garray.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gasyncqueue.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gthread.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gatomic.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/glib-typeof.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gerror.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gquark.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gutils.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gbacktrace.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gbase64.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gbitlock.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gbookmarkfile.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gdatetime.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gtimezone.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gbytes.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gcharset.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gchecksum.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gconvert.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gdataset.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gdate.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gdir.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/genviron.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gfileutils.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/ggettext.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/ghash.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/glist.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gmem.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gnode.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/ghmac.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gchecksum.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/ghook.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/ghostutils.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/giochannel.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gmain.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gpoll.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gslist.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gstring.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gunicode.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gstrfuncs.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gkeyfile.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gmappedfile.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gmarkup.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gmessages.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gvariant.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gvarianttype.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/goption.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gpathbuf.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gpattern.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gprimes.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gqsort.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gqueue.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/grand.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/grcbox.h \
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+ contain.h graph_area.h \
+ /gnu/store/0gxl8awg16qysdmxsflwnz0gyynrgs99-mesa-24.0.4/include/GL/glext.h \
+ /gnu/store/0gxl8awg16qysdmxsflwnz0gyynrgs99-mesa-24.0.4/include/KHR/khrplatform.h
diff --git a/init.o b/init.o
new file mode 100644
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diff --git a/main.d b/main.d
new file mode 100644
index 0000000..6c89c45
--- /dev/null
+++ b/main.d
@@ -0,0 +1 @@
+main.o: main.c callback.h
diff --git a/main.o b/main.o
new file mode 100644
index 0000000..396a812
Binary files /dev/null and b/main.o differ
diff --git a/myprogram b/myprogram
new file mode 100755
index 0000000..1ef1ebe
Binary files /dev/null and b/myprogram differ
diff --git a/parsing.d b/parsing.d
new file mode 100644
index 0000000..329b8de
--- /dev/null
+++ b/parsing.d
@@ -0,0 +1,112 @@
+parsing.o: parsing.c \
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+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/gversion.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/deprecated/gallocator.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/deprecated/gcache.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/deprecated/gcompletion.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/deprecated/gmain.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/deprecated/grel.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/deprecated/gthread.h \
+ /gnu/store/hsby4biv4wjywr7slvjf0ykk1xzf31xb-glib-2.78.0/include/glib-2.0/glib/glib-autocleanups.h
diff --git a/parsing.h b/parsing.h
index de6af9b..1cf7ff8 100644
--- a/parsing.h
+++ b/parsing.h
@@ -36,3 +36,8 @@ bool model_get_next_state(char *new_state_id);
 bool model_get_next_arrow(struct arrow_t *new_arrow,
                           const char *state_id,
                           char dimension);
+
+long model_get_state_arrows_count(const char *state_id);
+bool model_get_next_arrow(struct arrow_t *new_arrow,
+                          const char *state_id,
+                          char dimension);
diff --git a/parsing.o b/parsing.o
new file mode 100644
index 0000000..5821f88
Binary files /dev/null and b/parsing.o differ
diff --git a/texts.c b/texts.c
index ff71f3b..f14fdf9 100644
--- a/texts.c
+++ b/texts.c
@@ -14,6 +14,7 @@ char *get_space_run_edit_specif(){ return "\n\
         +  le buffer [elapsed time] qui montre le temps de simulation écoulé\n\n\
 (2)  les commandes qui modifient la perception de l'espace  (la caméra)\n\
         -  son orientation (X,Y,Z),\n\
+        +  l'orientation (X,Y,Z) de l'état dans l'espace (six possibilités),\n\
         +  le zoom,\n\
         +  les paramètres qui définissent la perspective (distances oeil/écran, écran/objet virtuel) \n\n\
 (3)  les commandes qui modifient les apparences des objets et des situations d'intérêt\n\
@@ -23,6 +24,7 @@ char *get_space_run_edit_specif(){ return "\n\
 >>>   Dans : [space_page - mode EDIT] doivent être :   ------------------------------------------------------\n\n\
 (1)  les commandes qui modifient la perception de l'espace  (la caméra)\n\
         -  son orientation (X,Y,Z),\n\
+        +  l'orientation (X,Y,Z) de l'état dans l'espace (six possibilités),\n\
         +  le zoom,\n\
         +  les paramètres qui définissent la perspective (distances oeil/écran, écran/objet virtuel) \n\n\
 (2)  les commandes qui modifient les apparences des objets et des situations d'intérêt\n\
diff --git a/texts.d b/texts.d
new file mode 100644
index 0000000..18de62c
--- /dev/null
+++ b/texts.d
@@ -0,0 +1 @@
+texts.o: texts.c
diff --git a/texts.o b/texts.o
new file mode 100644
index 0000000..bc9f402
Binary files /dev/null and b/texts.o differ
diff --git a/tree.d b/tree.d
new file mode 100644
index 0000000..dccd5fb
--- /dev/null
+++ b/tree.d
@@ -0,0 +1 @@
+tree.o: tree.c contain.h texts.h callback.h
diff --git a/tree.o b/tree.o
new file mode 100644
index 0000000..e01a976
Binary files /dev/null and b/tree.o differ