From dab3d244782805bf0638cbd8142db3fc5ac3c921 Mon Sep 17 00:00:00 2001
From: u214892 <u214892@sbb.ch>
Date: Mon, 23 Sep 2019 13:13:25 +0200
Subject: [PATCH] #80 Why do we not allow actions to change while running in a
cell?
---
docs/specifications/specifications.md | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/docs/specifications/specifications.md b/docs/specifications/specifications.md
index 7d002594..2b748442 100644
--- a/docs/specifications/specifications.md
+++ b/docs/specifications/specifications.md
@@ -105,8 +105,13 @@ Currently (as of **Flat**land 2.0), an agent keeps its speed over the whole epis
Because the different speeds are implemented as fractions the agents ability to perform actions has been updated.
We **do not allow actions to change within the cell **.
-This means that each agent can only chose an action to be taken when entering a cell.
-This action is then executed when a step to the next cell is valid. For example
+This means that each agent can only chose an action to be taken when entering a cell (ie. positional fraction is 0).
+There is some real railway specific considerations such as reserved blocks that are similar to this behavior.
+But more importantly we disabled this to simplify the use of machine learning algorithms with the environment.
+If we allow stop actions in the middle of cells. then the controller needs to make much more observations and not only at cell changes.
+(Not set in stone and could be updated if the need arises).
+
+The chosen action is then executed when a step to the next cell is valid. For example
- Agent enters switch and choses to deviate left. Agent fractional speed is 1/4 and thus the agent will take 4 time steps to complete its journey through the cell. On the 4th time step the agent will leave the cell deviating left as chosen at the entry of the cell.
- All actions chosen by the agent during its travels within a cell are ignored
--
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