From 5b9a638607f11a11767099863d50ce3c8e8dc1cf Mon Sep 17 00:00:00 2001
From: Matthieu Schaller <schaller@strw.leidenuniv.nl>
Date: Fri, 17 May 2019 17:28:49 +0100
Subject: [PATCH] Drift before you FOF.
---
src/engine.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/engine.c b/src/engine.c
index b9bb4aadc6..fd74cd50d3 100644
--- a/src/engine.c
+++ b/src/engine.c
@@ -2620,8 +2620,14 @@ void engine_prepare(struct engine *e) {
/* Perform FOF search to seed black holes. Only if there is a rebuild coming
* and no repartitioing. */
if (e->policy & engine_policy_fof && e->forcerebuild && !e->forcerepart &&
- e->run_fof)
+ e->run_fof) {
+
+ /* Let's start by drifting everybody to the current time */
+ engine_drift_all(e, /*drift_mpole=*/0);
+ drifted_all = 1;
+
engine_fof(e);
+ }
/* Do we need repartitioning ? */
if (e->forcerepart) {
--
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