Merge branch 'master' into OrderedSystemPipeline

# Conflicts:
#	src/Game/Game.cpp

src/Game/CMakeLists.txt

@@ -19,6 +19,7 @@ file(GLOB SOURCE_FILES
 set(SOURCE_FILES
     ${SOURCE_FILES}
     "Game.cpp"
+    "HealthSystem.cpp"
 	"PlayerSystem.cpp"
 )
 

src/Game/Game.cpp

@@ -1,6 +1,7 @@
 #include "Game.h"
 #include "Collision/TriggerSystem.h"
 #include "Collision/CollisionSystem.h"
+#include "Game/HealthSystem.h"
 
 Game::Game(int argc, char* argv[])
 {
@@ -27,7 +28,7 @@ Game::Game(int argc, char* argv[])
         0,
         m_Config->Get<int>("Video.Width", 1280),
         m_Config->Get<int>("Video.Height", 720)
-    ));
+        ));
     m_Renderer->Initialize();
     m_Renderer->Camera()->SetFOV(glm::radians(m_Config->Get<float>("Video.FOV", 90.f)));
 
@@ -58,6 +59,7 @@ Game::Game(int argc, char* argv[])
     m_SystemPipeline->AddSystem<RaptorCopterSystem>(updateOrderLevel);
     m_SystemPipeline->AddSystem<PlayerSystem>(updateOrderLevel);
     m_SystemPipeline->AddSystem<EditorSystem>(updateOrderLevel, m_Renderer);
+    m_SystemPipeline->AddSystem<HealthSystem>(updateOrderLevel);
 
     //Collision and TriggerSystem should update after player.
     ++updateOrderLevel;

src/Game/HealthSystem.cpp

@@ -0,0 +1,52 @@
+#include "HealthSystem.h"
+#include <algorithm>
+
+HealthSystem::HealthSystem(EventBroker* eventBroker)
+    : PureSystem(eventBroker, "Health")
+{
+    //subscribe/listenTo playerdamage,healthpickup events (using the eventBroker)
+    EVENT_SUBSCRIBE_MEMBER(m_EPlayerDamage, &HealthSystem::OnPlayerDamaged);
+    EVENT_SUBSCRIBE_MEMBER(m_EPlayerHealthPickup, &HealthSystem::OnPlayerHealthPickup);
+}
+
+void HealthSystem::UpdateComponent(World *world, ComponentWrapper &health, double dt)
+{
+    //if entityID of health is 9 then the players ID is also 9 (player,health are connected to the same entity)
+    ComponentWrapper player = world->GetComponent(health.EntityID, "Player");
+    double maxHealth = (double)health["MaxHealth"];
+
+    //process the DeltaHealthVector and change the entitys health accordingly
+    for (size_t i = m_DeltaHealthVector.size(); i > 0; i--)
+    {
+        auto deltaHP = m_DeltaHealthVector[i - 1];
+        //if we have a healthchange for the current player, then apply it
+        if (std::get<0>(deltaHP) == player.EntityID) {
+            //get the deltaHP value from the tuple and make sure you dont get more than maxHealth
+            double newHealth = std::min((double)health["Health"] + (double)std::get<1>(deltaHP), maxHealth);
+            health["Health"] = newHealth;
+            m_DeltaHealthVector.erase(m_DeltaHealthVector.begin() + i - 1);
+        }
+    }
+
+    //check if health is <= 0
+    if ((double)health["Health"] <= 0.0f) {
+        //publish death event
+        Events::PlayerDeath e;
+        e.PlayerID = player.EntityID;
+        m_EventBroker->Publish(e);
+    }
+}
+
+bool HealthSystem::OnPlayerDamaged(const Events::PlayerDamage& e)
+{
+    //save the changed HP to a vector. it will be taken care of in UpdateComponent
+    m_DeltaHealthVector.push_back(std::make_tuple(e.PlayerDamagedID, -e.DamageAmount));
+    return true;
+}
+
+bool HealthSystem::OnPlayerHealthPickup(const Events::PlayerHealthPickup& e)
+{
+    //save the changed HP to a vector. it will be taken care of in UpdateComponent
+    m_DeltaHealthVector.push_back(std::make_tuple(e.PlayerHealedID, e.HealthAmount));
+    return true;
+}