From 4daaec1a9458b2df7215bd2b330cf0cd6797ebf3 Mon Sep 17 00:00:00 2001
From: Peter Nelson <peter@fuzzle.org>
Date: Sat, 19 Jan 2019 20:59:27 +0000
Subject: [PATCH] Change: Invalidate ship path caches if pathfinder choice or
 forbid-90-degree turns are changed.

---
 src/settings.cpp       | 9 +++++++++
 src/table/settings.ini | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/src/settings.cpp b/src/settings.cpp
index 3e61cc87f8..ae797e09b9 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1312,6 +1312,15 @@ static bool MaxVehiclesChanged(int32 p1)
 	return true;
 }
 
+static bool InvalidateShipPathCache(int32 p1)
+{
+	Ship *s;
+	FOR_ALL_SHIPS(s) {
+		s->path.clear();
+	}
+	return true;
+}
+
 
 #ifdef ENABLE_NETWORK
 
diff --git a/src/table/settings.ini b/src/table/settings.ini
index bb6159693a..7afdd80801 100644
--- a/src/table/settings.ini
+++ b/src/table/settings.ini
@@ -42,6 +42,7 @@ static bool InvalidateCompanyInfrastructureWindow(int32 p1);
 static bool InvalidateCompanyWindow(int32 p1);
 static bool ZoomMinMaxChanged(int32 p1);
 static bool MaxVehiclesChanged(int32 p1);
+static bool InvalidateShipPathCache(int32 p1);
 
 #ifdef ENABLE_NETWORK
 static bool UpdateClientName(int32 p1);
@@ -820,6 +821,7 @@ var      = pf.forbid_90_deg
 def      = false
 str      = STR_CONFIG_SETTING_FORBID_90_DEG
 strhelp  = STR_CONFIG_SETTING_FORBID_90_DEG_HELPTEXT
+proc     = InvalidateShipPathCache
 cat      = SC_EXPERT
 
 [SDT_VAR]
@@ -942,6 +944,7 @@ interval = 1
 str      = STR_CONFIG_SETTING_PATHFINDER_FOR_SHIPS
 strhelp  = STR_CONFIG_SETTING_PATHFINDER_FOR_SHIPS_HELPTEXT
 strval   = STR_CONFIG_SETTING_PATHFINDER_OPF
+proc     = InvalidateShipPathCache
 cat      = SC_EXPERT
 
 [SDT_BOOL]