add activity diagrams

docs_sphinx/developer.rst

@@ -16,6 +16,23 @@ BTCS functionalities are externally outsourced and not visible to the user.
 Activity Diagram for run routine in simulation class
 ====================================================
 
+The following activity diagram represents the actions when the run method is called within the simulation class. 
+For better distinction, the activities of the calculation methods FTCS and BTCS are shown in two separate activity diagrams.
+
 .. image:: images/activity_diagram_run.svg
     :width: 2000
-    :alt: Activity diagram for the run method in the simulation class
+    :alt: Activity diagram for the run method in the simulation class
+
+
+**Activity Diagram for FTCS method**
+
+.. image:: images/activity_diagram_FTCS.svg
+    :width: 400
+    :alt: Activity diagram for the FTCS method
+
+
+**Activity Diagram for BTCS method**
+
+.. image:: images/activity_diagram_BTCS.svg
+    :width: 400
+    :alt: Activity diagram for the BTCS method