Particle system up and running, but with bugged rendering

include/Core/Engine.h

@@ -52,6 +52,8 @@
 #include "Physics/CRectangleShape.h"
 #include "Physics/ESetImpulse.h"
 #include "Physics/CWaterVolume.h"
+#include "Physics/CParticle.h"
+#include "Physics/CParticleEmitter.h"
 
 #include "Game/EGameStart.h"
 #include "Sound/EPlaySound.h"
@@ -129,6 +131,8 @@ public:
 		m_World->ComponentFactory.Register<Components::Template>();
 		m_World->ComponentFactory.Register<Components::PointLight>();
 		m_World->ComponentFactory.Register<Components::WaterVolume>();
+		m_World->ComponentFactory.Register<Components::Particle>();
+		m_World->ComponentFactory.Register<Components::ParticleEmitter>();
 		m_World->Initialize();
 
 
@@ -165,7 +169,7 @@ public:
 			pl->Radius = 20.f;
 			pl->Diffuse = glm::vec3(0.8f, 0.7f, 0.05f);
 			auto model = m_World->AddComponent<Components::Model>(t_Light);
-			model->ModelFile = "Core/UnitSphere.obj";
+			model->ModelFile = "Models/Core/UnitSphere.obj";
 			m_World->CommitEntity(t_Light);
 		}
 		{
@@ -176,7 +180,7 @@ public:
 			pl->Radius = 15.f;
 			pl->Diffuse = glm::vec3(0.1f, 0.5f, 0.8f);
 			auto model = m_World->AddComponent<Components::Model>(t_Light);
-			model->ModelFile = "Core/UnitSphere.obj";
+			model->ModelFile = "Models/Core/UnitSphere.obj";
 			m_World->CommitEntity(t_Light);
 		}
 
@@ -188,7 +192,7 @@ public:
 			transform->Scale = glm::vec3(6.f, 6.f, 10.f);
 			auto model = m_World->AddComponent<Components::Model>(t_halfPipe);
 			model->ModelFile = "Models/Test/halfpipe/Halfpipe.obj";
-			model->Color = glm::vec4(1.f, 1.f, 1.f, 0.3f);
+			model->Color = glm::vec4(1.f, 0.f, 0.f, 0.3f);
 			m_World->CommitEntity(t_halfPipe);
 		}
 
@@ -203,16 +207,44 @@ public:
 			m_World->CommitEntity(background);
 		}
 
-		//Water test
+		//ParticleTest
-		{
+//		{
-			auto t_waterBody = m_World->CreateEntity();
+//			auto Pe = m_World->CreateEntity();
-			auto transform = m_World->AddComponent<Components::Transform>(t_waterBody);
+//			auto transform = m_World->AddComponent<Components::Transform>(Pe);
-			transform->Position = glm::vec3(0.f, -0.5f, -10.f);
+//			auto particleEmitter= m_World->AddComponent<Components::ParticleEmitter>(Pe);
-			transform->Scale = glm::vec3(1.f, 1.f, 1.f);
+//
-			auto water = m_World->AddComponent<Components::WaterVolume>(t_waterBody);
+//			transform->Position = glm::vec3(0.f, -5.f, -10.f);
-			auto body = m_World->AddComponent<Components::RectangleShape>(t_waterBody);
+//			particleEmitter->GravityScale = 0.0f;
-			m_World->CommitEntity(t_waterBody);
+//			particleEmitter->SpawnRate = 1.0f;
-		}
+//
+//			{
+//				auto Pt = m_World->CreateEntity(Pe);
+//				auto PtTransform = m_World->AddComponent<Components::Transform>(Pt);
+//				auto PtSprite = m_World->AddComponent<Components::Sprite>(Pt);
+//				//auto PtModel = m_World->AddComponent<Components::Model>(Pt);
+//				auto PtParticle = m_World->AddComponent<Components::Particle>(Pt);
+//				auto PtTemplate = m_World->AddComponent<Components::Template>(Pt);
+//
+//				PtTransform->Velocity = glm::vec3(1.0f, 0.f, 0.f);
+//				PtTransform->Position = transform->Position;
+//				PtSprite->SpriteFile = "Textures/Ball.png";
+//
+//				//PtModel->ModelFile = "Models/Brick/Brick.obj";
+//				PtParticle->LifeTime = 1000.f;
+//				PtParticle->Flags = ParticleFlags::Type::powderParticle;
+//			}
+//			m_World->CommitEntity(Pe);
+//		}
+
+//		{
+//			auto Pt = m_World->CreateEntity();
+//			auto PtTransform = m_World->AddComponent<Components::Transform>(Pt);
+//			auto PtSprite = m_World->AddComponent<Components::Sprite>(Pt);
+//
+//			PtTransform->Position = glm::vec3(2.f, 0.f, -10.f);
+//			PtSprite->SpriteFile = "Textures/Ball.png";
+//		}
+		
 		//Water test
 		{
 			auto t_waterBody = m_World->CreateEntity();
@@ -371,7 +403,7 @@ public:
 		// Swap event queues to get fresh input data in the read queue
 		//m_EventBroker->Swap();
 
-		ResourceManager::Update();
+		//ResourceManager::Update();
 		if (m_GameIsRunning) {
 			m_World->Update(dt);
 		}
@@ -460,7 +492,6 @@ public:
 			auto spriteComponent = m_World->GetComponent<Components::Sprite>(entity);
 			if (spriteComponent)
 			{
-
 				std::string normal = spriteComponent->NormalTexture;
 				std::string spec = spriteComponent->SpecularTexture;
 
@@ -483,7 +514,6 @@ public:
 				EnqueueSprite(texturediff, texturenorm, texturespec, modelMatrix, spriteComponent->Color, absoluteTransform.Position.z);
 			}
 		}
-
 	}
 
 	//TODO: Get this out of engine.h

include/Physics/CParticle.h

@@ -0,0 +1,65 @@
+#ifndef COMPONENTS_PARTICLE_H__
+#define COMPONENTS_PARTICLE_H__
+#include "Core/Component.h"
+
+namespace dd {
+
+namespace ParticleFlags {
+
+enum Type {
+    waterParticle = 0,
+    zombieParticle = 1 << 1,
+    wallParticle = 1 << 2,
+    springParticle = 1 << 3,
+    elasticParticle = 1 << 4,
+    viscousParticle = 1 << 5,
+    powderParticle = 1 << 6,
+    tensileParticle = 1 << 7,
+    colorMixingParticle = 1 << 8,
+    destructionListenerParticle = 1 << 9,
+    barrierParticle = 1 << 10,
+    staticPressureParticle = 1 << 11,
+    reactiveParticle = 1 << 12,
+    repulsiveParticle = 1 << 13,
+    fixtureContactListenerParticle = 1 << 14,
+    particleContactListenerParticle = 1 << 15,
+    fixtureContactFilterParticle = 1 << 16,
+    particleContactFilterParticle = 1 << 17
+};
+}
+
+namespace Components
+{
+
+struct Particle : public Component
+{
+    float Radius = 0.5f;
+    float LifeTime = 5.0f;
+
+    ParticleFlags::Type Flags =
+            ParticleFlags::Type::waterParticle |
+            ParticleFlags::Type::zombieParticle |
+            ParticleFlags::Type::wallParticle |
+            ParticleFlags::Type::springParticle |
+            ParticleFlags::Type::elasticParticle |
+            ParticleFlags::Type::viscousParticle |
+            ParticleFlags::Type::powderParticle |
+            ParticleFlags::Type::tensileParticle |
+            ParticleFlags::Type::colorMixingParticle |
+            ParticleFlags::Type::destructionListenerParticle |
+            ParticleFlags::Type::barrierParticle |
+            ParticleFlags::Type::staticPressureParticle |
+            ParticleFlags::Type::reactiveParticle |
+            ParticleFlags::Type::repulsiveParticle |
+            ParticleFlags::Type::fixtureContactListenerParticle |
+            ParticleFlags::Type::particleContactListenerParticle |
+            ParticleFlags::Type::fixtureContactFilterParticle |
+            ParticleFlags::Type::particleContactFilterParticle;
+
+};
+
+}
+
+}
+
+#endif

include/Physics/CParticleEmitter.h

@@ -0,0 +1,25 @@
+#ifndef COMPONENTS_PARTICLEEMITTER_H__
+#define COMPONENTS_PARTICLEEMITTER_H__
+#include "Core/Component.h"
+
+namespace dd
+{
+namespace Components
+{
+
+struct ParticleEmitter : public Component
+{
+    int Amount = 10.f;
+    float InitialSpeed = 1.f;
+    double SpawnRate = 1.f;
+    double TimeSinceLastSpawn = 0;
+
+    //ParticleSystem variables
+    float GravityScale = 1.0f;
+};
+
+}
+
+}
+
+#endif

include/Physics/PhysicsSystem.h

@@ -18,6 +18,9 @@
 #include "Physics/CWaterVolume.h"
 #include "Game/CBall.h"
 #include "Rendering/CSprite.h"
+#include "Physics/CParticle.h"
+#include "Physics/CParticleEmitter.h"
+#include "Core/CTemplate.h"
 
 
 namespace dd
@@ -66,18 +69,29 @@ private:
     std::unordered_map<b2Body*, EntityID> m_BodiesToEntities;
 
     void CreateBody(EntityID entity);
-    void CreateParticleSystem(float radius);
 
     std::vector<b2ParticleSystem*> m_ParticleSystem;
     std::vector<b2ParticleGroup*> t_ParticleGroup;
 
-    std::unordered_map<EntityID, const b2ParticleHandle*> m_EntitiesToParticleHandle;
+    std::vector<std::unordered_map<EntityID, const b2ParticleHandle*>> m_EntitiesToParticleHandle;
-    std::unordered_map<const b2ParticleHandle*, EntityID> m_ParticleHandleToEntities;
+    std::vector<std::unordered_map<const b2ParticleHandle*, EntityID>> m_ParticleHandleToEntities;
 
+    b2ParticleSystem* CreateParticleSystem(float radius, float gravityScale);
     void InitializeWater();
-    void SyncWater(); //TODO: Probably remove this
     void CreateParticleGroup(EntityID entity);
+    void CreateParticleEmitter(EntityID entity);
+    void UpdateParticleEmitters(double dt); //TODO: Remove them and particles if needed.
 
+    //TODO: Fill struct with info needed.
+    struct ParticleEmitter
+    {
+        std::vector<b2ParticleSystem*> ParticleSystem;
+        std::vector<EntityID> ParticleEmitter;
+        std::vector<EntityID> ParticleTemplate;
+    };
+    ParticleEmitter m_ParticleEmitters;
+
+    //TODO: Struct med listor är bättre än en lista med structs
     struct Impulse
     {
         b2Body* Body;

src/game/Core/Renderer.cpp

@@ -312,7 +312,7 @@ void dd::Renderer::Draw(RenderQueueCollection& rq)
 void dd::Renderer::DrawDeferred(RenderQueue &objects, RenderQueue &lights)
 {
 	// Pass #1: Fill G-buffers
-	glDisable(GL_CULL_FACE);
+	glEnable(GL_CULL_FACE);
 	glCullFace(GL_BACK);
 	glDepthMask(GL_TRUE);
 	glEnable(GL_DEPTH_TEST);
@@ -444,6 +444,7 @@ void dd::Renderer::DrawScene(RenderQueue &objects, ShaderProgram &program)
 			glUniformMatrix4fv(glGetUniformLocation(shaderProgramHandle, "V"), 1, GL_FALSE, glm::value_ptr(viewMatrix));
 			glUniform4fv(glGetUniformLocation(shaderProgramHandle, "Color"), 1, glm::value_ptr(modelJob->Color));
 
+
 			glActiveTexture(GL_TEXTURE0);
 			glBindTexture(GL_TEXTURE_2D, spriteJob->DiffuseTexture);
 			glActiveTexture(GL_TEXTURE1);

src/game/Physics/PhysicsSystem.cpp

@@ -30,9 +30,8 @@ void dd::Systems::PhysicsSystem::Initialize()
 void dd::Systems::PhysicsSystem::InitializeWater()
 {
     float radius = 0.13f;
-
+    float gravityScale = 1.0f;
-
+    CreateParticleSystem(radius, gravityScale);
-    CreateParticleSystem(radius);
 }
 
 bool dd::Systems::PhysicsSystem::SetImpulse(const Events::SetImpulse &event)
@@ -58,24 +57,22 @@ bool dd::Systems::PhysicsSystem::SetImpulse(const Events::SetImpulse &event)
     return true;
 }
 
-void dd::Systems::PhysicsSystem::Update(double dt)
+void dd::Systems::PhysicsSystem::Update(double dt) {
-{
 
     m_Accumulator += dt;
-    while(m_Accumulator >= m_TimeStep)
+    while (m_Accumulator >= m_TimeStep) {
-    {
 
         for (auto i : m_EntitiesToBodies) {
             EntityID entity = i.first;
-            b2Body* body = i.second;
+            b2Body *body = i.second;
 
             auto transformComponent = m_World->GetComponent<Components::Transform>(entity);
-            if (! transformComponent) {
+            if (!transformComponent) {
                 continue;
                 LOG_ERROR("RigidBody with no TransformComponent");
             }
             auto physicsComponent = m_World->GetComponent<Components::Physics>(entity);
-            if (! physicsComponent) {
+            if (!physicsComponent) {
                 continue;
                 LOG_ERROR("RigidBody with no PhysicsComponent");
             }
@@ -102,19 +99,19 @@ void dd::Systems::PhysicsSystem::Update(double dt)
             }
         }
 
+        UpdateParticleEmitters(dt);
+
         for (auto i : m_Impulses) {
             i.Body->ApplyLinearImpulse(i.Impulse, i.Point, true);
         }
         m_Impulses.clear();
 
-
         m_PhysicsWorld->Step(m_TimeStep, m_VelocityIterations, m_PositionIterations);
 
 
-
         for (auto i : m_EntitiesToBodies) {
             EntityID entity = i.first;
-            b2Body* body = i.second;
+            b2Body *body = i.second;
 
             if (body == nullptr) {
                 LOG_ERROR("This body should not exist");
@@ -122,15 +119,17 @@ void dd::Systems::PhysicsSystem::Update(double dt)
             }
 
             auto transformComponent = m_World->GetComponent<Components::Transform>(entity);
-            if (! transformComponent)
+            if (!transformComponent)
                 continue;
-        auto parent = m_World->GetEntityParent(entity);
+            auto parent = m_World->GetEntityParent(entity);
-        if (parent == 0) {
+            if (parent == 0) {
 
                 auto physicsComponent = m_World->GetComponent<Components::Physics>(entity);
                 if (physicsComponent->Calculate) { //TODO: REPLACE THIS WITH PARTICLE COLLISION FILTERS
-                    transformComponent->Position.x = transformComponent->Position.x + (transformComponent->Velocity.x * m_TimeStep);
+                    transformComponent->Position.x =
-                    transformComponent->Position.y = transformComponent->Position.y + (transformComponent->Velocity.y * m_TimeStep);
+                            transformComponent->Position.x + (transformComponent->Velocity.x * m_TimeStep);
+                    transformComponent->Position.y =
+                            transformComponent->Position.y + (transformComponent->Velocity.y * m_TimeStep);
                 }
                 else {
                     b2Vec2 position = body->GetPosition();
@@ -138,36 +137,42 @@ void dd::Systems::PhysicsSystem::Update(double dt)
                     transformComponent->Position.y = position.y;
 
                     float angle = body->GetAngle();
-                    transformComponent->Orientation =  glm::quat(glm::vec3(0, 0, angle));
+                    transformComponent->Orientation = glm::quat(glm::vec3(0, 0, angle));
 
                     b2Vec2 velocity = body->GetLinearVelocity();
                     transformComponent->Velocity.x = velocity.x;
                     transformComponent->Velocity.y = velocity.y;
                 }
             }
-
         }
 
-    b2Vec2* positionBuffer = m_ParticleSystem[0]->GetPositionBuffer();
+        for ( int e = 0; e < m_EntitiesToParticleHandle.size(); e++) {
-    for (auto i : m_EntitiesToParticleHandle) {
+            b2Vec2 *positionBuffer = m_ParticleSystem[e]->GetPositionBuffer();
-        EntityID entity = i.first;
+            for (auto i : m_EntitiesToParticleHandle[e]){
-        b2ParticleHandle* particleH = i.second;
+                EntityID entity = i.first;
+                b2ParticleHandle *particleH = i.second;
 
-        b2Vec2 positionB2 = positionBuffer[particleH->GetIndex()];
+                b2Vec2 positionB2 = positionBuffer[particleH->GetIndex()];
-        glm::vec2 position = glm::vec2(positionB2.x, positionB2.y);
+                glm::vec2 position = glm::vec2(positionB2.x, positionB2.y);
 
+                EntityID entityParent = m_World->GetEntityParent(entity);
+                glm::vec3 parentTransform = glm::vec3(0.f);
+                if(entityParent) {
+                    auto tp = m_World->GetComponent<Components::Transform>(entityParent);
+                    parentTransform = tp->Position;
+                }
+                auto transform = m_World->GetComponent<Components::Transform>(entity);
 
-        EntityID entityParent = m_World->GetEntityParent(entity);
+                transform->Position = glm::vec3(position.x, position.y, -10) - parentTransform;
-        auto transform = m_World->GetComponent<Components::Transform>(entity);
-        auto transformParent = m_World->GetComponent<Components::Transform>(entityParent);
 
-        transform->Position = glm::vec3(position.x, position.y, -10) - transformParent->Position;
+            }
-    }
+        }
 
         m_Accumulator -= dt;
     }
 }
 
+
 void dd::Systems::PhysicsSystem::UpdateEntity(double dt, EntityID entity, EntityID parent)
 {
 
@@ -177,15 +182,23 @@ void dd::Systems::PhysicsSystem::OnEntityCommit(EntityID entity)
 {
     auto physicsComponent = m_World->GetComponent<Components::Physics>(entity);
     auto waterComponent = m_World->GetComponent<Components::WaterVolume>(entity);
+    auto particleEmitterComponent = m_World->GetComponent<Components::ParticleEmitter>(entity);
 
     if (physicsComponent && waterComponent) {
         LOG_ERROR("Entity has both water and physics component, this is illegal. The police has been alerted.");
         return;
     }
+    if (physicsComponent && particleEmitterComponent) {
+        LOG_ERROR("Entity has both particle and physics component, this is illegal. The police has been alerted.");
+        return;
+    }
+
     if (physicsComponent) {
         CreateBody(entity);
     } else if (waterComponent) {
         CreateParticleGroup(entity);
+    } else if (particleEmitterComponent) {
+        CreateParticleEmitter(entity);
     }
 }
 
@@ -208,7 +221,6 @@ void dd::Systems::PhysicsSystem::OnEntityRemoved(EntityID entity)
 
 }
 
-
 void dd::Systems::PhysicsSystem::CreateBody(EntityID entity)
 {
     auto physicsComponent = m_World->GetComponent<Components::Physics>(entity);
@@ -292,41 +304,128 @@ void dd::Systems::PhysicsSystem::CreateParticleGroup(EntityID e)
     auto transform = m_World->GetComponent<Components::Transform>(e);
     if (!transform) {
         LOG_ERROR("No Transform component in CreateParticleGroup");
-        return;
     }
-
     b2ParticleGroupDef pd;
     b2PolygonShape shape;
-    //TODO: FIX SO IT CAN NOTICE WHAT PARTICLE SYSTEM IS WATER! [0] IS A FUCKING BULLSHIT FIX.
+    auto water = m_World->GetComponent<Components::WaterVolume>(e);
+    if (water) {
 
-    shape.SetAsBox(transform->Scale.x/2.f, transform->Scale.y/2.f);
+        shape.SetAsBox(transform->Scale.x/2.f, transform->Scale.y/2.f);
-    pd.shape = &shape;
+        pd.shape = &shape;
-    pd.flags = b2_tensileParticle;
+        pd.flags = b2_tensileParticle;
-    pd.position.Set(transform->Position.x, transform->Position.y);
+        pd.position.Set(transform->Position.x, transform->Position.y);
-    t_ParticleGroup.push_back(m_ParticleSystem[0]->CreateParticleGroup(pd));
+        t_ParticleGroup.push_back(m_ParticleSystem[0]->CreateParticleGroup(pd));
-    b2Vec2* t_ParticlePositions = m_ParticleSystem[0]->GetPositionBuffer();
+        b2Vec2* t_ParticlePositions = m_ParticleSystem[0]->GetPositionBuffer();
-    for(int i = 0; i < m_ParticleSystem[0]->GetParticleCount(); i++){
+        for(int i = 0; i < m_ParticleSystem[0]->GetParticleCount(); i++){
-        {
+            {
-            auto t_waterparticle = m_World->CreateEntity(e);
+                auto t_waterparticle = m_World->CreateEntity(e);
-            auto transformChild = m_World->AddComponent<Components::Transform>(t_waterparticle);
+                auto transformChild = m_World->AddComponent<Components::Transform>(t_waterparticle);
 
-            transformChild->Position = glm::vec3(t_ParticlePositions[i].x - transform->Position.x, t_ParticlePositions[i].y - transform->Position.y, -9.5f);
+                transformChild->Position = glm::vec3(t_ParticlePositions[i].x - transform->Position.x, t_ParticlePositions[i].y - transform->Position.y, -9.5f);
-            transformChild->Scale = glm::vec3(m_ParticleSystem[0]->GetRadius())/transform->Scale;
+                transformChild->Scale = glm::vec3(m_ParticleSystem[0]->GetRadius())/transform->Scale;
-            m_World->CommitEntity(t_waterparticle);
+                m_World->CommitEntity(t_waterparticle);
+
+                m_EntitiesToParticleHandle[0].insert(std::make_pair(t_waterparticle, m_ParticleSystem[0]->GetParticleHandleFromIndex(i)));
+                m_ParticleHandleToEntities[0].insert(std::make_pair( m_ParticleSystem[0]->GetParticleHandleFromIndex(i), t_waterparticle));
+            }
 
-            m_EntitiesToParticleHandle.insert(std::make_pair(t_waterparticle, m_ParticleSystem[0]->GetParticleHandleFromIndex(i)));
-            m_ParticleHandleToEntities.insert(std::make_pair( m_ParticleSystem[0]->GetParticleHandleFromIndex(i), t_waterparticle));
         }
 
     }
 }
 
-void dd::Systems::PhysicsSystem::CreateParticleSystem(float radius)
+void dd::Systems::PhysicsSystem::UpdateParticleEmitters(double dt)
 {
+    for (int i = 0; i < m_ParticleEmitters.ParticleSystem.size(); i++) {
+        auto e = m_ParticleEmitters.ParticleEmitter[i];
+        auto pt = m_ParticleEmitters.ParticleTemplate[i];
+        auto ps = m_ParticleEmitters.ParticleSystem[i];
+
+
+        auto emitter = m_World->GetComponent<Components::ParticleEmitter>(e);
+        auto particleTemplate = m_World->GetComponent<Components::Particle>(pt);
+        emitter->TimeSinceLastSpawn += dt;
+        if(emitter->TimeSinceLastSpawn < emitter->SpawnRate) {
+            continue;
+        }
+        emitter->TimeSinceLastSpawn -= emitter->SpawnRate;
+        auto templateTransform = m_World->GetComponent<Components::Transform>(pt);
+
+        b2ParticleDef particleDef;
+        particleDef.flags = particleTemplate->Flags;
+        //particleDef.color TODO: Implement this if we want color mixing and shit.
+        particleDef.lifetime = particleTemplate->LifeTime;
+        particleDef.velocity = b2Vec2(templateTransform->Velocity.x, templateTransform->Velocity.y);
+        particleDef.position = b2Vec2(templateTransform->Position.x, templateTransform->Position.y);
+
+        auto particle = m_World->CloneEntity(pt, 0);
+        m_World->RemoveComponent<Components::Template>(particle);
+
+        auto b2Particle = ps->CreateParticle(particleDef);
+        auto b2ParticleHandle = ps->GetParticleHandleFromIndex(b2Particle);
+        m_EntitiesToParticleHandle[i].insert(std::make_pair(particle, b2ParticleHandle));
+        m_ParticleHandleToEntities[i].insert(std::make_pair(b2ParticleHandle, particle));
+
+        //TODO: Ta bort detta
+        int particles = 0;
+        for (auto i : m_EntitiesToParticleHandle)
+        {
+            particles += i.size();
+        }
+        LOG_INFO("--I have %i particles.", particles);
+    }
+}
+
+void dd::Systems::PhysicsSystem::CreateParticleEmitter(EntityID entity)
+{
+    auto childEntities = m_World->GetEntityChildren(entity);
+    if (childEntities.empty()) {
+        LOG_ERROR("Particle Emitter does not have any child. Please adopt one or this will not work.");
+        return;
+    }
+    int pf = 0;
+    dd::Components::Particle* particle;
+    EntityID childEntity;
+    for ( auto c : childEntities ) {
+        auto p = m_World->GetComponent<Components::Particle>(c);
+        auto particleTemplate = m_World->GetComponent<Components::Template>(c);
+        if (!p) {
+            continue;
+            LOG_WARNING("--ParticleEmitter's Child is not a particle.");
+        }
+        if(!particleTemplate) {
+            LOG_ERROR("ParticleEmitter's particleChild is not a template.");
+            continue;
+        }
+        if (pf != 0) {
+            LOG_WARNING("ParticleEmitter has more than one child that is a particleTemplate, only the first one is used.");
+            break;
+        }
+        childEntity = c;
+        particle = p;
+        pf++;
+    }
+    //TODO: Skicka med fler flaggor till particlesystemet;
+    m_ParticleEmitters.ParticleSystem.push_back(CreateParticleSystem(particle->Radius, 0.f));
+    m_ParticleEmitters.ParticleEmitter.push_back(entity);
+    m_ParticleEmitters.ParticleTemplate.push_back(childEntity);
+}
+
+
+b2ParticleSystem* dd::Systems::PhysicsSystem::CreateParticleSystem(float radius, float gravityScale)
+{
+    std::unordered_map<EntityID, const b2ParticleHandle*> m1;
+    std::unordered_map<const b2ParticleHandle*, EntityID> m2;
+    m_EntitiesToParticleHandle.push_back(m1);
+    m_ParticleHandleToEntities.push_back(m2);
+
     b2ParticleSystemDef m_ParticleSystemDef;
     m_ParticleSystemDef.radius = radius;
+    m_ParticleSystemDef.gravityScale = gravityScale;
 
     m_ParticleSystem.push_back(m_PhysicsWorld->CreateParticleSystem(&m_ParticleSystemDef));
+
+    return m_ParticleSystem.back();
 }
 
 dd::Systems::PhysicsSystem::~PhysicsSystem()