From 313f8ac69b900ed7aac7a1d48f23b1505aa1fe15 Mon Sep 17 00:00:00 2001
From: ian <ian>
Date: Sun, 27 Jul 2008 22:54:30 +0000
Subject: [PATCH] MARGIN_TRAINLENGTH

---
 hostside/resolve.c | 4 ++--
 hostside/safety.c  | 5 +++--
 hostside/safety.h  | 3 ++-
 3 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/hostside/resolve.c b/hostside/resolve.c
index 34f7b00..c9a4266 100644
--- a/hostside/resolve.c
+++ b/hostside/resolve.c
@@ -506,8 +506,8 @@ static void end_constraints(FindEndUserContext *u) {
     cons->min= lim.min;
     cons->max= lim.max;
   } else {
-    cons->max= -lim.min + tra->detectable;
-    cons->min= -lim.max + tra->detectable;
+    cons->max= -lim.min + ceil(tra->detectable * MARGIN_TRAINLENGTH);
+    cons->min= -lim.max + ceil(tra->detectable * MARGIN_TRAINLENGTH);
   }
   cons->lastdetect= u->lastdetect;
   cons->hardend= u->t.seg;
diff --git a/hostside/safety.c b/hostside/safety.c
index 1de3970..21e1d9e 100644
--- a/hostside/safety.c
+++ b/hostside/safety.c
@@ -772,7 +772,8 @@ ErrorCode predict(Train *tra, struct timeval tnow, unsigned flags,
    * so we must instead extend our idea of the length of the train.
    */
 
-  int tail_walkback= MARGIN_NOSE + tail_length(tra) + tra->detectable;
+  int tail_walkback= MARGIN_NOSE + tail_length(tra) +
+    ceil(tra->detectable * MARGIN_TRAINLENGTH);
   int tail_advance_delaydist= MARGIN_TAIL;
 
   int effective_into_fdet= tra->maxinto - tra->uncertainty;
@@ -1145,7 +1146,7 @@ ErrorCode safety_setdirection(Train *tra, int backwards,
   newfdet.remain= tra->maxinto;
   newfdet.backwards= !tra->foredetect->tr_backwards;
 
-  c.distance= tra->detectable + tra->uncertainty;
+  c.distance= ceil(tra->detectable * MARGIN_TRAINLENGTH) + tra->uncertainty;
   c.nextseg= reverse_nextseg;
   c.getmovpos= 0;
   c.trackend= reverse_trackend;
diff --git a/hostside/safety.h b/hostside/safety.h
index 6f918a5..263e219 100644
--- a/hostside/safety.h
+++ b/hostside/safety.h
@@ -48,7 +48,7 @@ struct Train {
      * foremost reference possibility, plus ->head, plus MARGIN_NOSE
      * (and if it is not stationary it may own more).  It owns the
      * track backwards from the rearmost reference possibility for
-     * ->detectable plus ->tail plus MARGIN_NOSE.
+     * ceil(->detectable * MARGIN_TRAINLENGTH) + ->tail + MARGIN_NOSE.
      */
   unsigned
     backwards:1, /* train is moving backwards wrt its own front and back */
@@ -402,6 +402,7 @@ int trackloc_set_exactinto(TrackLocation *t, TrackAdvanceContext *c,
 #define MARGIN_SPEED 1.2 /*ratio*/
 #define MARGIN_AUTOPOINTTIME 500 /*ms*/
 #define UNMARGIN_ROUNDING 1e-4 /* mm/ms; for 1s, leads to max err of 100um */
+#define MARGIN_TRAINLENGTH 1.05
 
 #define MARGIN_STOPTIME 240 /*ms*/
 #define MARGIN_POLARISETIME 120 /*ms*/
-- 
2.30.2