From 1859125218996520c86cdc82e1ddf6967c8e0540 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tam=C3=A1s=20B=C3=A1lint=20Misius?= <lbphacker@gmail.com>
Date: Sun, 11 Apr 2021 21:44:08 +0200
Subject: [PATCH] Fix undo not updating air block map

---
 src/simulation/Simulation.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp
index 51921421d..47b010809 100644
--- a/src/simulation/Simulation.cpp
+++ b/src/simulation/Simulation.cpp
@@ -556,6 +556,7 @@ void Simulation::Restore(const Snapshot & snap)
 		parts[i].type = 0;
 	std::copy(snap.Particles.begin(), snap.Particles.end(), parts);
 	parts_lastActiveIndex = NPART-1;
+	air->RecalculateBlockAirMaps();
 	RecalcFreeParticles(false);
 	std::copy(snap.PortalParticles.begin(), snap.PortalParticles.end(), &portalp[0][0][0]);
 	std::copy(snap.WirelessData.begin(), snap.WirelessData.end(), &wireless[0][0]);