Merge remote-tracking branch 'origin/particles' into havok

Conflicts:
	src/Components/Vehicle.h

src/Component.h

@@ -7,6 +7,8 @@
 struct Component
 {
 	EntityID Entity;
+
+	virtual Component* Clone() const = 0;
 };
 
 class ComponentFactory : public Factory<Component*> { };

src/Components/BoxShape.h

@@ -14,6 +14,8 @@ struct BoxShape : Component
 	float Width;
 	float Height;
 	float Depth;
+
+	virtual BoxShape* Clone() const override { return new BoxShape(*this); }
 };
 
 }

src/Components/Camera.h

@@ -17,6 +17,8 @@ struct Camera : Component
 	float FOV;
 	float NearClip;
 	float FarClip;
+
+	virtual Camera* Clone() const override { return new Camera(*this); }
 };
 
 }

src/Components/DirectionalLight.h

@@ -13,6 +13,8 @@ struct DirectionalLight : Component
 	float MaxRange;
 	float SpecularIntensity;
 	Color Color;
+
+	virtual DirectionalLight* Clone() const override { return new DirectionalLight(*this); }
 };
 
 }

src/Components/FreeSteering.h

@@ -9,6 +9,8 @@ struct FreeSteering : Component
 {
 	FreeSteering() : Speed(35) { }
 	float Speed;
+
+	virtual FreeSteering* Clone() const override { return new FreeSteering(*this); }
 };
 }
 

src/Components/HingeConstraint.h

@@ -11,6 +11,8 @@ namespace Components
 		EntityID LinkedEntity;
 		glm::vec3 Pivot;
 		glm::vec3 Axis;
+
+		virtual HingeConstraint* Clone() const override { return new HingeConstraint(*this); }
 	};
 
 }

src/Components/Input.h

@@ -18,6 +18,8 @@ struct Input : Component
 	std::array<int, GLFW_MOUSE_BUTTON_LAST+1> LastMouseState;
 	float dX, dY;
 	float WheelDelta;
+
+	virtual Input* Clone() const override { return new Input(*this); }
 };
 
 }

src/Components/MeshShape.h

@@ -11,6 +11,8 @@ namespace Components
 struct MeshShape : Component
 {
 	std::string ResourceName;
+
+	virtual MeshShape* Clone() const override { return new MeshShape(*this); }
 };
 
 }

src/Components/Model.h

@@ -16,6 +16,8 @@ struct Model : Component
 	Color Color;
 	bool Visible;
 	bool ShadowCaster;
+
+	virtual Model* Clone() const override { return new Model(*this); }
 };
 
 }

src/Components/Particle.h

@@ -0,0 +1,25 @@
+#ifndef Components_Particle_h__
+#define Components_Particle_h__
+
+#include "System.h"
+#include "Component.h"
+#include "Color.h"
+#include <vector>
+
+namespace Components
+{
+
+	struct Particle : Component
+	{
+		std::vector<Color> ColorSpectrum;
+		std::vector<glm::vec3> ScaleSpectrum;
+		double LifeTime;
+		std::vector<glm::vec3> VelocitySpectrum;
+		std::vector<float> AngularVelocitySpectrum;
+		std::vector<glm::vec3> OrientationSpectrum; //Keep?
+
+		virtual Particle* Clone() const override { return new Particle(*this); }
+	};
+
+}
+#endif // !Components_Particle_h__

src/Components/ParticleEmitter.h

@@ -5,20 +5,39 @@
 #include "Color.h"
 #include <vector>
 
+namespace Systems { class ParticleSystem; }
+
 namespace Components
 {
 
 struct ParticleEmitter : Component
 {
-	int ParticleTemplate;
+	friend class Systems::ParticleSystem;
+
+	ParticleEmitter() 
+		: SpawnFrequency(0)
+		, SpawnCount(0)
+		, SpreadAngle(0)
+		, LifeTime(0)
+		, TimeSinceLastSpawn(0) { } 
+
+	EntityID ParticleTemplate;
 	float SpawnFrequency;
+	float Speed;
 	int SpawnCount;
 	std::vector<Color> ColorSpectrum;
-	std::vector<float> ScaleSpectrum;
+	std::vector<glm::vec3> ScaleSpectrum;
 	float SpreadAngle;
-	float LifeTime;
-	std::vector<float[3]> VelocitySpectrum;
-	std::vector<float[3]> AngularVelocitySpectrum;
+	double LifeTime;
+	bool UseGoalVelocity;
+	glm::vec3 GoalVelocity;
+	std::vector<float> AngularVelocitySpectrum;
+	std::vector<glm::vec3> OrientationSpectrum; //Keep?
+
+	virtual ParticleEmitter* Clone() const override { return new ParticleEmitter(*this); }
+
+private:
+	double TimeSinceLastSpawn;
 };
 
 }

src/Components/Physics.h

@@ -13,6 +13,8 @@ struct Physics : Component
 
 	float Mass;
 	bool Static;
+
+	virtual Physics* Clone() const override { return new Physics(*this); }
 };
 
 }

src/Components/PointLight.h

@@ -16,6 +16,8 @@ struct PointLight : Component
 	float constantAttenuation, linearAttenuation, quadraticAttenuation;
 	float spotExponent;
 	Color color;
+	
+	virtual PointLight* Clone() const override { return new PointLight(*this); }
 };
 
 }

src/Components/SoundEmitter.h

@@ -17,6 +17,8 @@ struct SoundEmitter : Component
 	float Pitch;
 	bool Loop;
 	std::string Path;
+
+	virtual SoundEmitter* Clone() const override { return new SoundEmitter(*this); }
 };
 
 }

src/Components/SphereShape.h

@@ -12,6 +12,8 @@ struct SphereShape : Component
 		: Radius(1.f){ }
 
 	float Radius;
+
+	virtual SphereShape* Clone() const override { return new SphereShape(*this); }
 };
 
 }

src/Components/Sprite.h

@@ -13,6 +13,8 @@ struct Sprite : Component
 {
 	std::string SpriteFile;
 	Color Color;
+	
+	virtual Sprite* Clone() const override { return new Sprite(*this); }
 };
 
 }

src/Components/TankSteering.h

@@ -7,7 +7,7 @@ namespace Components
 {
 	struct TankSteering : Component
 	{
-		
+		TankSteering* Clone() const override { return new TankSteering(*this); }
 	};
 }
 

src/Components/Template.h

@@ -6,7 +6,12 @@
 namespace Components
 {
 
-struct Template : Component { };
+struct Template 
+	: public Component 
+{
+	virtual Template* Clone() const override { return nullptr; }
+};
 
 }
+
 #endif // !Components_Template_h__

src/Components/Transform.h

@@ -6,7 +6,7 @@
 namespace Components
 {
 
-struct Transform : Component
+struct Transform : public Component
 {
 	Transform()
 		: Scale(glm::vec3(1.f)) { }
@@ -15,6 +15,8 @@ struct Transform : Component
 	glm::quat Orientation;
 	glm::vec3 Velocity;
 	glm::vec3 Scale;
+
+	virtual Transform* Clone() const override { return new Transform(*this); }
 };
 
 }

src/Components/Vehicle.h

@@ -23,6 +23,8 @@ struct Vehicle : Component
 	float TopSpeed;
 	float MaxSpeedFullSteeringAngle;
 	float SpringDamping;
+	
+	Vehicle* Clone() const override { return new Vehicle(*this); }
 };
 
 }

src/Components/Wheel.h

@@ -36,6 +36,8 @@ struct Wheel : Component
 private:
 	int ID;
 	glm::quat OriginalOrientation;
+
+	Wheel* Clone() const override { return new Wheel(*this); }
 };
 
 }

src/Components/WheelPair.h

@@ -9,6 +9,8 @@ namespace Components
 	struct WheelPair : Component
 	{
 		// Flag for pair wheels
+
+		virtual WheelPair* Clone() const override { return new WheelPair(*this); }
 	};
 
 }

src/GameWorld.cpp

@@ -85,18 +85,7 @@ void GameWorld::Initialize()
 		CommitEntity(ground);
 	}
 
-	{
-		auto camera = CreateEntity();
-		auto transform = AddComponent<Components::Transform>(camera, "Transform");
-		transform->Position.z = 20.f;
-		transform->Position.y = 10.f;
-		transform->Orientation = glm::quat(glm::vec3(-glm::pi<float>() / 8.f, 0.f, 0.f));
-		auto cameraComp = AddComponent<Components::Camera>(camera, "Camera");
-		cameraComp->FarClip = 2000.f;
-		AddComponent(camera, "Input");
-		auto freeSteering = AddComponent<Components::FreeSteering>(camera, "FreeSteering");
-		CommitEntity(camera);
-	}
+	
 
 	/*{
 		auto jeep = CreateEntity();
@@ -511,6 +500,30 @@ void GameWorld::Initialize()
 				CommitEntity(shape);
 			}
 			CommitEntity(wheel);
+
+			auto entity = CreateEntity(tank);
+			auto transformComponent = AddComponent<Components::Transform>(entity, "Transform");
+			transformComponent->Position = glm::vec3(2,-1.7,2.0);
+			transformComponent->Scale = glm::vec3(3,3,3);
+			transformComponent->Orientation = glm::angleAxis(glm::pi<float>()/2, glm::vec3(1,0,0));
+			auto emitterComponent = AddComponent<Components::ParticleEmitter>(entity, "ParticleEmitter");
+			emitterComponent->SpawnCount = 2;
+			emitterComponent->SpawnFrequency = 0.005;
+			emitterComponent->SpreadAngle = glm::pi<float>();
+			emitterComponent->UseGoalVelocity = false;
+			emitterComponent->LifeTime = 0.5;
+			//emitterComponent->AngularVelocitySpectrum.push_back(glm::pi<float>() / 100);
+			emitterComponent->ScaleSpectrum.push_back(glm::vec3(0.05));
+			CommitEntity(entity);
+
+			auto particleEntity = CreateEntity(entity);
+			auto TEMP = AddComponent<Components::Transform>(particleEntity, "Transform");
+			TEMP->Scale = glm::vec3(0);
+			auto spriteComponent = AddComponent<Components::Sprite>(particleEntity, "Sprite");
+			spriteComponent->SpriteFile = "Models/Textures/Sprites/Dust.png";
+			emitterComponent->ParticleTemplate = particleEntity;
+
+			CommitEntity(particleEntity);
 		}
 
 		{
@@ -571,11 +584,50 @@ void GameWorld::Initialize()
 				CommitEntity(shape);
 			}
 			CommitEntity(wheel);
+
+			auto entity = CreateEntity(tank);
+			auto transformComponent = AddComponent<Components::Transform>(entity, "Transform");
+			transformComponent->Position = glm::vec3(-2,-1.7,2.0);
+			transformComponent->Scale = glm::vec3(3,3,3);
+			transformComponent->Orientation = glm::angleAxis(glm::pi<float>()/2, glm::vec3(1,0,0));
+			auto emitterComponent = AddComponent<Components::ParticleEmitter>(entity, "ParticleEmitter");
+			emitterComponent->SpawnCount = 2;
+			emitterComponent->SpawnFrequency = 0.005;
+			emitterComponent->SpreadAngle = glm::pi<float>();
+			emitterComponent->UseGoalVelocity = false;
+			emitterComponent->LifeTime = 0.5;
+			//emitterComponent->AngularVelocitySpectrum.push_back(glm::pi<float>() / 100);
+			emitterComponent->ScaleSpectrum.push_back(glm::vec3(0.05));
+			CommitEntity(entity);
+
+			auto particleEntity = CreateEntity(entity);
+			auto TEMP = AddComponent<Components::Transform>(particleEntity, "Transform");
+			TEMP->Scale = glm::vec3(0);
+			auto spriteComponent = AddComponent<Components::Sprite>(particleEntity, "Sprite");
+			spriteComponent->SpriteFile = "Models/Textures/Sprites/Dust.png";
+			emitterComponent->ParticleTemplate = particleEntity;
+
+			CommitEntity(particleEntity);
 		}
 
 		CommitEntity(tank);
+		{
+			auto camera = CreateEntity(tank);
+			auto transform = AddComponent<Components::Transform>(camera, "Transform");
+			transform->Position.z = 20.f;
+			transform->Position.y = 7.f;
+			//transform->Orientation = glm::quat(glm::vec3(-glm::pi<float>() / 8.f, 0.f, 0.f));
+			transform->Orientation = glm::angleAxis(glm::pi<float>() / 100, glm::vec3(1,0,0));
+			auto cameraComp = AddComponent<Components::Camera>(camera, "Camera");
+			cameraComp->FarClip = 2000.f;
+			AddComponent(camera, "Input");
+			auto freeSteering = AddComponent<Components::FreeSteering>(camera, "FreeSteering");
+			CommitEntity(camera);
+		}
 	}
 
+	
+
 	/*
 		for(int i = 0; i < 10; i++)
 		{
@@ -663,6 +715,7 @@ void GameWorld::Initialize()
 		GetSystem<Systems::SoundSystem>("SoundSystem")->PlaySound(emitter);
 		CommitEntity(entity);
 	}*/
+
 }
 
 void GameWorld::Update(double dt)
@@ -683,7 +736,7 @@ void GameWorld::RegisterSystems()
 	m_SystemFactory.Register("InputSystem", [this]() { return new Systems::InputSystem(this, m_EventBroker); });
 	m_SystemFactory.Register("DebugSystem", [this]() { return new Systems::DebugSystem(this, m_EventBroker); });
 	//m_SystemFactory.Register("CollisionSystem", [this]() { return new Systems::CollisionSystem(this); });
-	////m_SystemFactory.Register("ParticleSystem", [this]() { return new Systems::ParticleSystem(this); });
+	m_SystemFactory.Register("ParticleSystem", [this]() { return new Systems::ParticleSystem(this, m_EventBroker); });
 	//m_SystemFactory.Register("PlayerSystem", [this]() { return new Systems::PlayerSystem(this); });
 	m_SystemFactory.Register("FreeSteeringSystem", [this]() { return new Systems::FreeSteeringSystem(this, m_EventBroker); });
 	m_SystemFactory.Register("TankSteeringSystem", [this]() { return new Systems::TankSteeringSystem(this, m_EventBroker); });
@@ -699,7 +752,7 @@ void GameWorld::AddSystems()
 	AddSystem("InputSystem");
 	AddSystem("DebugSystem");
 	//AddSystem("CollisionSystem");
-	////AddSystem("ParticleSystem");
+	AddSystem("ParticleSystem");
 	//AddSystem("PlayerSystem");
 	AddSystem("FreeSteeringSystem");
 	AddSystem("TankSteeringSystem");

src/GameWorld.h

@@ -9,7 +9,7 @@
 #include "Systems/InputSystem.h"
 #include "Systems/DebugSystem.h"
 //#include "Systems/LevelGenerationSystem.h"
-//#include "Systems/ParticleSystem.h"
+#include "Systems/ParticleSystem.h"
 //#include "Systems/PlayerSystem.h"
 #include "Systems/FreeSteeringSystem.h"
 #include "Systems/TankSteeringSystem.h"
@@ -22,6 +22,7 @@
 #include "Components/Input.h"
 #include "Components/Model.h"
 #include "Components/ParticleEmitter.h"
+#include "Components/Particle.h"
 #include "Components/PointLight.h"
 #include "Components/SoundEmitter.h"
 #include "Components/Sprite.h"

src/Physics/VehicleSetup.h

@@ -43,6 +43,7 @@ public:
 	{
 		Components::Wheel* WheelComponent;
 		Components::Transform* TransformComponent;
+
 	};
 	
 	std::vector<WheelData> m_Wheels;

src/Renderer.cpp

@@ -267,6 +267,31 @@ void Renderer::DrawScene()
 		}
 	}
 
+	for (auto tuple : TexturesToRender)
+	{
+		Texture* texture;
+		glm::mat4 modelMatrix;
+		glm::mat4 billboardMatrix;
+		std::tie(texture, modelMatrix, billboardMatrix) = tuple;
+		
+		//MVP = cameraMatrix * glm::inverse(glm::toMat4(m_Camera->Orientation()) * modelMatrix );
+		MVP = cameraMatrix * modelMatrix * billboardMatrix;
+
+		depthMVP = depthCameraMatrix * modelMatrix;
+		glUniformMatrix4fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "MVP"), 1, GL_FALSE, glm::value_ptr(MVP));
+		glUniformMatrix4fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "DepthMVP"), 1, GL_FALSE, glm::value_ptr(depthMVP));
+		glUniformMatrix4fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "model"), 1, GL_FALSE, glm::value_ptr(modelMatrix));
+		glUniformMatrix4fv(glGetUniformLocation(m_ShaderProgram.GetHandle(), "view"), 1, GL_FALSE, glm::value_ptr(m_Camera->ViewMatrix()));
+		
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, *texture);
+		glBindVertexArray(m_ScreenQuad);
+		glDrawArrays(GL_TRIANGLES, 0, 6);
+	}
+
+	
+
+
 #ifdef DEBUG
 	// Debug draw model normals
 	if (m_DrawNormals)
@@ -318,6 +343,8 @@ void Renderer::DrawShadowMap()
 			glDrawArrays(GL_TRIANGLES, texGroup.StartIndex, texGroup.EndIndex - texGroup.StartIndex + 1);
 		}
 	}
+
+
 }
 
 void Renderer::DrawDebugShadowMap()
@@ -376,6 +403,24 @@ void Renderer::AddModelToDraw(Model* model, glm::vec3 position, glm::quat orient
 	ModelsToRender.push_back(std::make_tuple(model, modelMatrix, visible, shadowCaster));
 }
 
+void Renderer::AddTextureToDraw(Texture* texture, glm::vec3 position, glm::quat orientation, glm::vec3 scale)
+{
+	glm::mat4 modelMatrix = glm::translate(glm::mat4(), position) * glm::toMat4(orientation) * glm::scale(scale);
+
+	glm::vec3 camToParticle = glm::normalize(m_Camera->Position() - position);
+	glm::vec3 up = glm::vec3(0,1,0);
+	glm::vec3 rightVec = glm::normalize(glm::cross(up, camToParticle));
+	glm::vec3 up2 = glm::normalize(glm::cross(camToParticle, rightVec));
+	
+	glm::mat4 billboardMatrix;
+	billboardMatrix[0] = glm::vec4(rightVec, 0);
+	billboardMatrix[1] = glm::vec4(up2, 0);
+	billboardMatrix[2] = glm::vec4(camToParticle, 0);
+	//billboardMatrix[3] = glm::vec4(position, 0);
+
+	TexturesToRender.push_back(std::make_tuple(texture, modelMatrix, billboardMatrix));
+}
+
 void Renderer::AddPointLightToDraw(
     glm::vec3 _position,
     glm::vec3 _specular,
@@ -536,6 +581,7 @@ void Renderer::ClearStuff()
 {
 	AABBsToRender.clear();
 	ModelsToRender.clear();
+	TexturesToRender.clear();
 	Light_position.clear();
 	Light_specular.clear();
 	Light_diffuse.clear();

src/Renderer.h

@@ -25,6 +25,7 @@ public:
 	int Height() const { return m_Height; }
 
 	std::list<std::tuple<Model*, glm::mat4, bool, bool>> ModelsToRender;
+	std::list<std::tuple<Texture*, glm::mat4, glm::mat4>> TexturesToRender;
 	int Lights;
 	std::vector<float> Light_position;
 	std::vector<float> Light_specular;
@@ -42,6 +43,7 @@ public:
 	void DrawText();
 
 	void AddModelToDraw(Model* model, glm::vec3 position, glm::quat orientation, glm::vec3 scale, bool visible, bool shadowCaster);
+	void AddTextureToDraw(Texture* texture, glm::vec3 position, glm::quat orientation, glm::vec3 scale);
 	void AddTextToDraw();
 	void AddPointLightToDraw(
 	    glm::vec3 _position,

src/Systems/FreeSteeringSystem.cpp

@@ -56,19 +56,19 @@ bool Systems::FreeSteeringSystem::FreeSteeringInputController::OnCommand(const E
 	}
 	else if (event.Command == "+cam_right")
 	{
-		Movement.x += 1.f;
+		Movement.x -= 1.f;
 	}
 	else if (event.Command == "-cam_right")
 	{
-		Movement.x -= 1.f;
+		Movement.x += 1.f;
 	}
 	else if (event.Command == "+cam_left")
 	{
-		Movement.x += -1.f;
+		Movement.x -= -1.f;
 	}
 	else if (event.Command == "-cam_left")
 	{
-		Movement.x -= -1.f;
+		Movement.x += -1.f;
 	}
 	else if (event.Command == "+up")
 	{

src/Systems/ParticleSystem.cpp

@@ -0,0 +1,208 @@
+#include "PrecompiledHeader.h"
+#include "ParticleSystem.h"
+
+
+#include "World.h"
+
+void Systems::ParticleSystem::Initialize()
+{
+	m_TransformSystem = m_World->GetSystem<Systems::TransformSystem>("TransformSystem");
+}
+
+void Systems::ParticleSystem::Update(double dt)
+{
+	
+}
+
+void Systems::ParticleSystem::UpdateEntity(double dt, EntityID entity, EntityID parent)
+{
+	auto transformComponent = m_World->GetComponent<Components::Transform>(entity, "Transform");
+	if(!transformComponent)
+		return;
+
+	auto emitterComponent = m_World->GetComponent<Components::ParticleEmitter>(entity, "ParticleEmitter");
+	if(emitterComponent)
+	{
+		emitterComponent->TimeSinceLastSpawn += dt;
+		auto emitterTransformComponent = m_World->GetComponent<Components::Transform>(entity, "Transform");
+		if(emitterComponent->TimeSinceLastSpawn > emitterComponent->SpawnFrequency)
+		{
+			SpawnParticles(entity);
+			emitterComponent->TimeSinceLastSpawn = 0;
+		}
+
+		std::list<ParticleData>::iterator it;
+		for(it = m_ParticleEmitter[entity].begin(); it != m_ParticleEmitter[entity].end();)
+		{
+			EntityID particleID = (it)->ParticleID;
+			auto transformComponent = m_World->GetComponent<Components::Transform>(particleID, "Transform");
+			auto particleComponent = m_World->GetComponent<Components::Particle>(particleID, "Particle");
+
+			double timeLived = glfwGetTime() - it->SpawnTime; 
+			if(timeLived > particleComponent->LifeTime)
+			{
+				m_World->RemoveEntity(particleID);
+				it = m_ParticleEmitter[entity].erase(it);
+			}
+			else
+			{
+				// FIX: calculate once
+				float timeProgress = timeLived / particleComponent->LifeTime; 
+				// ColorInterpolation(timeProgress, particleComponent->ColorSpectrum, color);
+				// Scale interpolation
+				if(particleComponent->ScaleSpectrum.size() > 1)
+					VectorInterpolation(timeProgress, particleComponent->ScaleSpectrum, transformComponent->Scale);
+				// Velocity interpolation
+				if(particleComponent->VelocitySpectrum.size() > 1)
+					VectorInterpolation(timeProgress, particleComponent->VelocitySpectrum, transformComponent->Velocity);
+				
+				// Angular velocity interpolation
+				if (particleComponent->AngularVelocitySpectrum.size() != 0)
+				{
+					if(particleComponent->AngularVelocitySpectrum.size() > 1)
+					{
+						ScalarInterpolation(timeProgress, particleComponent->AngularVelocitySpectrum, it->AngularVelocity);
+						transformComponent->Orientation = glm::angleAxis(it->AngularVelocity, it->Orientation);
+					}
+					else
+					{
+						transformComponent->Orientation *= glm::angleAxis(it->AngularVelocity, it->Orientation);
+						//it->Orientation =  glm::angleAxis(it->AngularVelocity, it->Orientation);
+					}
+				}
+				
+				//Angular velocity interpolation
+				if(particleComponent->OrientationSpectrum.size() > 1)
+				{
+					VectorInterpolation(timeProgress, particleComponent->OrientationSpectrum, it->Orientation);
+					glm::vec3 v1 = (particleComponent->OrientationSpectrum[0]);
+					glm::vec3 v2 = (it->Orientation);
+					glm::vec3 v3 = glm::normalize(glm::cross(v1,v2));
+					float angle = glm::acos(glm::dot(v1, v2) / (glm::length(v1) * glm::length(v2)));
+
+					transformComponent->Orientation = glm::angleAxis(angle, v3);
+				}
+				
+				
+				transformComponent->Position += transformComponent->Velocity * (float)dt;
+
+				it++;
+			}
+		}
+	}
+}
+
+void Systems::ParticleSystem::RegisterComponents(ComponentFactory* cf)
+{
+	cf->Register("ParticleEmitter", []() { return new Components::ParticleEmitter(); });
+	cf->Register("Particle", []() { return new Components::Particle(); });
+}
+
+
+void Systems::ParticleSystem::SpawnParticles(EntityID emitterID)
+{
+	auto emitterComponent = m_World->GetComponent<Components::ParticleEmitter>(emitterID, "ParticleEmitter");
+	auto emitterTransform = m_World->GetComponent<Components::Transform>(emitterID, "Transform");
+	glm::vec3 emitterPos = m_TransformSystem->AbsolutePosition(emitterID);
+	glm::quat emitterOrientation = emitterTransform->Orientation;
+
+	float tempSpeed =  4;
+	glm::vec3 speed = glm::vec3(tempSpeed);
+
+	for(int i = 0; i < emitterComponent->SpawnCount; i++)
+	{
+		auto ent = m_World->CloneEntity(emitterComponent->ParticleTemplate);
+
+		auto particleTransform = m_World->GetComponent<Components::Transform>(ent, "Transform");
+		particleTransform->Position = emitterPos;
+
+		particleTransform->Orientation = emitterOrientation;
+		//The emitter's orientation as "start value" times the default direction for emitter. Times the speed, and then rotate on x and y axis with the randomized spread angle. 
+		float spreadAngle = emitterComponent->SpreadAngle;
+		particleTransform->Velocity = emitterOrientation * glm::vec3(0, 0, -1) * speed * 
+			glm::normalize(glm::angleAxis(RandomizeAngle(spreadAngle), glm::vec3(1, 0, 0))) * 
+			glm::normalize(glm::angleAxis(RandomizeAngle(spreadAngle), glm::vec3(0, 1, 0))) *
+			glm::normalize(glm::angleAxis(RandomizeAngle(spreadAngle), glm::vec3(0, 0, 1)));
+
+		auto particle = m_World->AddComponent<Components::Particle>(ent, "Particle");
+		particle->LifeTime = emitterComponent->LifeTime;
+		particle->ScaleSpectrum = emitterComponent->ScaleSpectrum; 
+		particle->VelocitySpectrum.push_back(particleTransform->Velocity);
+		
+		if (emitterComponent->ScaleSpectrum.size() > 0)
+		{
+			if (emitterComponent->ScaleSpectrum.size() > 1)
+			{
+				particle->ScaleSpectrum = emitterComponent->ScaleSpectrum;
+			}
+			else
+			{
+				particleTransform->Scale = emitterComponent->ScaleSpectrum[0];
+			}
+		}
+		else
+		{
+			particleTransform->Scale = glm::vec3(1, 1, 1);
+		}
+		
+		if(emitterComponent->UseGoalVelocity)
+			particle->VelocitySpectrum.push_back(emitterComponent->GoalVelocity);
+		particle->OrientationSpectrum = emitterComponent->OrientationSpectrum;
+		if(particle->OrientationSpectrum.size() != 0)
+			particleTransform->Orientation = glm::angleAxis(0.f, particle->OrientationSpectrum[0]);
+		particle->AngularVelocitySpectrum = emitterComponent->AngularVelocitySpectrum;
+		
+
+		ParticleData data;
+		data.ParticleID = ent;
+		data.SpawnTime = glfwGetTime();
+		if (particle->AngularVelocitySpectrum.size() != 0)
+			data.AngularVelocity = particle->AngularVelocitySpectrum[0];
+		if (particle->OrientationSpectrum.size() != 0)
+			data.Orientation = particle->OrientationSpectrum[0];
+		else data.Orientation = emitterOrientation * glm::vec3(0,0,-1);
+		
+		m_ParticleEmitter[emitterID].push_back(data);
+	}
+}
+
+//Randomizes between -spreadAngle/2 and spreadAngle/2
+float Systems::ParticleSystem::RandomizeAngle(float spreadAngle)
+{
+	return ((float)rand() / ((float)RAND_MAX + 1) * spreadAngle) - spreadAngle/2;
+}
+
+//Interpolates the velocity of the particle
+void Systems::ParticleSystem::VectorInterpolation(double timeProgress, std::vector<glm::vec3> spectrum, glm::vec3 &v)
+{
+	float dAxisValue = glm::abs(spectrum[0].x - spectrum[1].x);
+	if(spectrum[0].x > spectrum[1].x)
+		dAxisValue *= -1;
+	v.x = spectrum[0].x + dAxisValue * timeProgress;
+	dAxisValue = glm::abs(spectrum[0].y - spectrum[1].y);
+	if (spectrum[0].y > spectrum[1].y)
+		dAxisValue *= -1;
+	v.y = spectrum[0].y + dAxisValue * timeProgress;	
+	dAxisValue = glm::abs(spectrum[0].z - spectrum[1].z);
+	if(spectrum[0].z > spectrum[1].z)
+		dAxisValue *= -1;
+	v.z = spectrum[0].z + dAxisValue * timeProgress;
+}
+
+// void Systems::ParticleSystem::ColorInterpolation(double timeProgress, std::vector<Color> spectrum, Color &c)
+// {
+// 	float dColor = glm::abs(spectrum[0].r - spectrum[1].r); 
+// 	c.r = spectrum[0].r + dColor * timeProgress;
+// 	dColor = glm::abs(spectrum[0].g - spectrum[1].g);
+// 	c.g = spectrum[0].g + dColor * timeProgress;
+// 	dColor = glm::abs(spectrum[0].b - spectrum[1].b);
+// 	c.b = spectrum[0].b + dColor * timeProgress;
+// }
+
+void Systems::ParticleSystem::ScalarInterpolation(double timeProgress, std::vector<float> spectrum, float &alpha)
+{
+	float dAlpha = glm::abs(spectrum[0] - spectrum[1]);
+	if(spectrum[0] > spectrum[1])
+		dAlpha *= -1;
+	alpha = spectrum[0] + dAlpha * timeProgress; 
+}

src/Systems/ParticleSystem.h

@@ -0,0 +1,54 @@
+#ifndef ParticleSystem_h__
+#define ParticleSystem_h__
+
+#include "System.h"
+#include "Systems/TransformSystem.h"
+#include "Components/Transform.h"
+#include "Components/ParticleEmitter.h"
+#include "Components/Particle.h"
+#include "Components/Model.h"
+#include "Components/PointLight.h"
+#include "Color.h"
+#include <GLFW/glfw3.h>
+
+namespace Systems
+{
+
+	struct ParticleData
+	{
+		EntityID ParticleID;
+		double SpawnTime;
+		float AngularVelocity;
+		glm::vec3 Orientation;
+		Color color;
+	};
+
+class ParticleSystem : public System
+{
+public:
+	ParticleSystem(World* world, std::shared_ptr<::EventBroker> eventBroker)
+		: System(world, eventBroker) { }
+
+	void RegisterComponents(ComponentFactory* cf) override;
+	void Update(double dt) override;
+	void UpdateEntity(double dt, EntityID entity, EntityID parent) override;
+	void Initialize() override;
+private:
+	void SpawnParticles(EntityID emitterID);
+	float RandomizeAngle(float spreadAngle);
+	//void ScaleInterpolation(double timeProgress, std::vector<float> spectrum, glm::vec3 &scale);
+	void VectorInterpolation(double timeProgress, std::vector<glm::vec3> spectrum, glm::vec3 &velocity);
+	//void ColorInterpolation(double timeProgress, std::vector<Color> spectrum, Color &color);
+	void ScalarInterpolation(double timeProgress, std::vector<float> spectrum, float &alpha);
+	void Billboard();
+	std::map<EntityID, std::list<ParticleData>> m_ParticleEmitter;
+	std::map<EntityID, double> m_TimeSinceLastSpawn;
+	std::shared_ptr<Systems::TransformSystem> m_TransformSystem;
+
+	
+};
+
+}
+
+
+#endif // !ParticleSystem_h__

src/Systems/RenderSystem.cpp

@@ -55,6 +55,17 @@ void Systems::RenderSystem::UpdateEntity(double dt, EntityID entity, EntityID pa
 		m_Renderer->GetCamera()->NearClip(cameraComponent->NearClip);
 		m_Renderer->GetCamera()->FarClip(cameraComponent->FarClip);
 	}
+
+	auto spriteComponent = m_World->GetComponent<Components::Sprite>(entity, "Sprite");
+	if(spriteComponent != nullptr)
+	{
+		//TEMP
+		Texture* texture = m_World->GetResourceManager()->Load<Texture>("Texture", spriteComponent->SpriteFile);
+		//glBindTexture(GL_TEXTURE_2D, texture);
+		auto transform = m_World->GetComponent<Components::Transform>(spriteComponent->Entity, "Transform");
+		glm::quat orientation2D = glm::angleAxis(glm::eulerAngles(transform->Orientation).z, glm::vec3(0, 0, -1));
+		m_Renderer->AddTextureToDraw(texture, transform->Position, orientation2D, transform->Scale);
+	}
 }
 
 void Systems::RenderSystem::Initialize()

src/World.cpp

@@ -90,6 +90,7 @@ void World::ProcessEntityRemovals()
 	for (auto entity : m_EntitiesToRemove)
 	{
 		m_EntityParents.erase(entity);
+		m_EntityChildren.erase(entity);
 		// Remove components
 		for (auto pair : m_EntityComponents[entity])
 		{
@@ -113,7 +114,8 @@ void World::ProcessEntityRemovals()
 EntityID World::CreateEntity(EntityID parent /*= 0*/)
 {
 	EntityID newEntity = GenerateEntityID();
-	m_EntityParents.insert(std::pair<EntityID, EntityID>(newEntity, parent));
+	m_EntityParents[newEntity] = parent;
+	m_EntityChildren[parent].push_back(newEntity);
 	return newEntity;
 }
 
@@ -144,7 +146,58 @@ void World::CommitEntity(EntityID entity)
 	}
 }
 
+void World::AddComponent(EntityID entity, std::string componentType, std::shared_ptr<Component> component)
+{
+	component->Entity = entity;
+	m_ComponentsOfType[componentType].push_back(component);
+	m_EntityComponents[entity][componentType] = component;
+	for (auto pair : m_Systems)
+	{
+		auto system = pair.second;
+		system->OnComponentCreated(componentType, component);
+	}
+}
+
 void World::AddSystem(std::string systemType)
 {
 	m_Systems[systemType] = std::shared_ptr<System>(m_SystemFactory.Create(systemType));
 }
+
+EntityID World::CloneEntity(EntityID entity, EntityID parent /* = 0 */)
+{
+	int clone = CreateEntity(parent);
+
+	for (auto pair : m_EntityComponents[entity])
+	{
+		auto type = pair.first;
+		auto component = std::shared_ptr<Component>(pair.second->Clone());
+		if (component != nullptr)
+		{
+			AddComponent(clone, type, component);
+		}
+	}
+
+	auto itChildren = m_EntityChildren.find(entity);
+	if (itChildren != m_EntityChildren.end())
+	{
+		for (EntityID child : itChildren->second)
+		{
+			CloneEntity(child, clone);
+		}
+	}
+
+	return clone;
+}
+
+std::list<EntityID> World::GetEntityChildren(EntityID entity)
+{
+	auto it = m_EntityChildren.find(entity);
+	if (it == m_EntityChildren.end())
+	{
+		return std::list<EntityID>();
+	}
+	else
+	{
+		return it->second;
+	}
+}

src/World.h

@@ -37,6 +37,7 @@ public:
 	std::shared_ptr<T> GetSystem(std::string systemType);
 
 	EntityID CreateEntity(EntityID parent = 0);
+	EntityID CloneEntity(EntityID entity, EntityID parent = 0);
 
 	void RemoveEntity(EntityID entity);
 
@@ -44,6 +45,7 @@ public:
 
 	EntityID GetEntityParent(EntityID entity);
 	EntityID GetEntityBaseParent(EntityID entity);
+	std::list<EntityID> GetEntityChildren(EntityID entity);
 
 	template <class T>
 	T GetProperty(EntityID entity, std::string property)
@@ -95,13 +97,16 @@ protected:
 
 	EntityID m_LastEntityID;
 	std::stack<EntityID> m_RecycledEntityIDs;
-	// A bottom to top tree. A map of child entities to parent entities.
-	std::unordered_map<EntityID, EntityID> m_EntityParents;
-	std::unordered_map<EntityID, std::unordered_map<std::string, boost::any>> m_EntityProperties;
 
+	std::unordered_map<EntityID, EntityID> m_EntityParents; // child -> parent
+	std::unordered_map<EntityID, std::list<EntityID>> m_EntityChildren; // parent -> child
+	std::unordered_map<EntityID, std::unordered_map<std::string, boost::any>> m_EntityProperties;
 	std::unordered_map<std::string, std::list<std::shared_ptr<Component>>> m_ComponentsOfType;
 	std::unordered_map<EntityID, std::map<std::string, std::shared_ptr<Component>>> m_EntityComponents;
 
+	// Internal: Add a component to an entity
+	void AddComponent(EntityID entity, std::string componentType, std::shared_ptr<Component> component);
+
 	std::list<EntityID> m_EntitiesToRemove;
 	void ProcessEntityRemovals();
 
@@ -133,14 +138,8 @@ std::shared_ptr<T> World::AddComponent(EntityID entity, std::string componentTyp
 		return nullptr;
 	}
 
-	component->Entity = entity;
-	m_ComponentsOfType[componentType].push_back(component);
-	m_EntityComponents[entity][componentType] = component;
-	for (auto pair : m_Systems)
-	{
-		auto system = pair.second;
-		system->OnComponentCreated(componentType, component);
-	}
+	AddComponent(entity, componentType, component);
+	
 	return component;
 }
 
@@ -148,7 +147,14 @@ std::shared_ptr<T> World::AddComponent(EntityID entity, std::string componentTyp
 template <class T>
 T* World::GetComponent(EntityID entity, std::string componentType)
 {
+	
+	/*auto it0 = m_EntityComponents.find(entity);
+
+	if (it0 == m_EntityComponents.end())
+	return nullptr;*/
+
 	auto components = m_EntityComponents[entity]; 
+
 	auto it = components.find(componentType);
 	if (it != components.end())
 	{

vs11/Returngeance/Returngeance.vcxproj

@@ -112,6 +112,7 @@
     <ClCompile Include="..\..\src\Systems\DebugSystem.cpp" />
     <ClCompile Include="..\..\src\Systems\FreeSteeringSystem.cpp" />
     <ClCompile Include="..\..\src\Systems\InputSystem.cpp" />
+    <ClCompile Include="..\..\src\Systems\ParticleSystem.cpp" />
     <ClCompile Include="..\..\src\Systems\PhysicsSystem.cpp" />
     <ClCompile Include="..\..\src\Systems\RenderSystem.cpp" />
     <ClCompile Include="..\..\src\Systems\SoundSystem.cpp" />
@@ -134,6 +135,7 @@
     <ClInclude Include="..\..\src\Components\Input.h" />
     <ClInclude Include="..\..\src\Components\MeshShape.h" />
     <ClInclude Include="..\..\src\Components\Model.h" />
+    <ClInclude Include="..\..\src\Components\Particle.h" />
     <ClInclude Include="..\..\src\Components\ParticleEmitter.h" />
     <ClInclude Include="..\..\src\Components\Physics.h" />
     <ClInclude Include="..\..\src\Components\PointLight.h" />
@@ -183,6 +185,7 @@
     <ClInclude Include="..\..\src\Systems\DebugSystem.h" />
     <ClInclude Include="..\..\src\Systems\FreeSteeringSystem.h" />
     <ClInclude Include="..\..\src\Systems\InputSystem.h" />
+    <ClInclude Include="..\..\src\Systems\ParticleSystem.h" />
     <ClInclude Include="..\..\src\Systems\PhysicsSystem.h" />
     <ClInclude Include="..\..\src\Systems\RenderSystem.h" />
     <ClInclude Include="..\..\src\Systems\SoundSystem.h" />

vs11/Returngeance/Returngeance.vcxproj.filters

@@ -50,6 +50,9 @@
     </ClCompile>
     <ClCompile Include="..\..\src\ResourceManager.cpp" />
     <ClCompile Include="..\..\src\Sound.cpp" />
+    <ClCompile Include="..\..\src\Systems\ParticleSystem.cpp">
+      <Filter>Particle System\Systems</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\EventBroker.cpp" />
     <ClCompile Include="..\..\src\Physics\VehicleSetup.cpp">
       <Filter>Physics</Filter>
@@ -264,6 +267,12 @@
     <ClInclude Include="..\..\src\Components\WheelPair.h">
       <Filter>Physics\Components</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\Systems\ParticleSystem.h">
+      <Filter>Particle System\Systems</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\Components\Particle.h">
+      <Filter>Particle System\Components</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\GUI\Frame.h">
       <Filter>GUI</Filter>
     </ClInclude>