From 23f64a38a27866e88e87602cc6f8b11ef7173d6e Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Mon, 4 Dec 2017 11:37:29 +0100
Subject: [PATCH] fix double deletes on app exit

---
 src/creature/Creature.hpp | 1 +
 src/creature/creature.cpp | 8 +++++++-
 src/world/Body.hpp        | 1 -
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/creature/Creature.hpp b/src/creature/Creature.hpp
index 498ebea..1c2556a 100644
--- a/src/creature/Creature.hpp
+++ b/src/creature/Creature.hpp
@@ -139,6 +139,7 @@ public:
 
 	void Hurt(double d) noexcept;
 	void Die() noexcept;
+	bool Dead() const noexcept;
 	void OnDeath(Callback cb) noexcept { on_death = cb; }
 	void Remove() noexcept;
 	bool Removable() const noexcept { return removable; }
diff --git a/src/creature/creature.cpp b/src/creature/creature.cpp
index de82f86..3c03e57 100644
--- a/src/creature/creature.cpp
+++ b/src/creature/creature.cpp
@@ -92,7 +92,7 @@ Creature::Creature(world::Simulation &sim)
 , mass(1.0)
 , size(1.0)
 , birth(sim.Time())
-, death(0.0)
+, death(-1.0)
 , on_death()
 , removable(false)
 , parents()
@@ -230,6 +230,8 @@ void Creature::Hurt(double amount) noexcept {
 }
 
 void Creature::Die() noexcept {
+	if (Dead()) return;
+
 	sim.SetDead(this);
 	death = sim.Time();
 	steering.Halt();
@@ -239,6 +241,10 @@ void Creature::Die() noexcept {
 	Remove();
 }
 
+bool Creature::Dead() const noexcept {
+	return death > birth;
+}
+
 void Creature::Remove() noexcept {
 	removable = true;
 }
diff --git a/src/world/Body.hpp b/src/world/Body.hpp
index 3cbb788..5ac4fa1 100644
--- a/src/world/Body.hpp
+++ b/src/world/Body.hpp
@@ -88,7 +88,6 @@ public:
 	void Cache() noexcept;
 	void CheckCollision() noexcept;
 
-	// body takes over ownership of given pointer
 	void AddCreature(creature::Creature *);
 	void RemoveCreature(creature::Creature *);
 	std::vector<creature::Creature *> &Creatures() noexcept { return creatures; }
-- 
2.39.2