Added support for multiple emitters. (ParticleEmitter component now friend class to ParticleSystem)

src/Components/ParticleEmitter.h

@@ -5,11 +5,15 @@
 #include "Color.h"
 #include <vector>
 
+namespace Systems { class ParticleSystem; }
+
 namespace Components
 {
 
 struct ParticleEmitter : Component
 {
+	friend class Systems::ParticleSystem;
+
 	EntityID ParticleTemplate;
 	float SpawnFrequency;
 	int SpawnCount;
@@ -19,6 +23,9 @@ struct ParticleEmitter : Component
 	double LifeTime;
 	std::vector<glm::vec3> VelocitySpectrum;
 	std::vector<glm::vec3> AngularVelocitySpectrum;
+
+private:
+	double TimeSinceLastSpawn;
 };
 
 }

src/GameWorld.cpp

@@ -77,7 +77,7 @@ void GameWorld::Initialize()
 		auto model = AddComponent<Components::Model>(ball, "Model");
 		model->ModelFile = "Models/Placeholders/PhysicsTest/Sphere.obj";
 		auto sphere = AddComponent<Components::Sphere>(ball, "Sphere");
-		sphere->Radius = 0.5;
+		sphere->Radius = 0.05;
 		auto physics = AddComponent<Components::Physics>(ball, "Physics");
 		physics->Mass = 1;
 	}
@@ -92,16 +92,21 @@ void GameWorld::Initialize()
 	}*/
 
 	{
-		// Particle emitter
-		auto ent = CreateEntity();
-		auto transform = AddComponent<Components::Transform>(ent, "Transform");
-		transform->Position = glm::vec3(0);
-		auto emitter = AddComponent<Components::ParticleEmitter>(ent, "ParticleEmitter");
-		emitter->LifeTime = 4;
-		emitter->SpawnCount = 1;
-		emitter->SpreadAngle = 35;
-		emitter->SpawnFrequency = 0.05;
-		//emitter->
+		for(int i = 0; i < 4 ; i++)
+		{
+			// Particle emitter
+			auto ent = CreateEntity();
+			auto transform = AddComponent<Components::Transform>(ent, "Transform");
+			transform->Position = glm::vec3(i * 10, 20, 0);
+			auto emitter = AddComponent<Components::ParticleEmitter>(ent, "ParticleEmitter");
+			emitter->LifeTime = 2;
+			emitter->SpawnCount = 1;
+			emitter->SpreadAngle = 35;
+			emitter->SpawnFrequency = 2;
+			auto model = AddComponent<Components::Model>(ent, "Model");
+			model->ModelFile = "Models/Placeholders/PhysicsTest/PointLight.obj";
+			//emitter->
+		}
 	}
 }
 

src/Systems/ParticleSystem.cpp

@@ -6,12 +6,12 @@
 
 Systems::ParticleSystem::ParticleSystem(World *m_World) : System(m_World)
 {
-	m_TimeSinceLastSpawn = 0;
+	
 }
 
 void Systems::ParticleSystem::Update(double dt)
 {
-	m_TimeSinceLastSpawn += dt;
+	
 }
 
 void Systems::ParticleSystem::UpdateEntity(double dt, EntityID entity, EntityID parent)
@@ -23,14 +23,13 @@ void Systems::ParticleSystem::UpdateEntity(double dt, EntityID entity, EntityID
 	auto emitterComponent = m_World->GetComponent<Components::ParticleEmitter>(entity, "ParticleEmitter");
 	if(emitterComponent)
 	{
-		if(m_TimeSinceLastSpawn > emitterComponent->SpawnFrequency)
+		emitterComponent->TimeSinceLastSpawn += dt;
+
+		auto transformComponent = m_World->GetComponent<Components::Transform>(entity, "Transform");
+		if(emitterComponent->TimeSinceLastSpawn > emitterComponent->SpawnFrequency)
 		{
-			//if(m_ParticleEmitter[entity].size() < 100) // TEMP
-			{
-				SpawnParticles(entity, emitterComponent->SpawnCount, emitterComponent->SpreadAngle);
-				m_TimeSinceLastSpawn = 0;
-			}
-			//std::cout<<"Particle count: "<<m_ParticleEmitter[entity].size()<<std::endl; // TEMP
+			SpawnParticles(entity, transformComponent->Position, emitterComponent->SpawnCount, emitterComponent->SpreadAngle);
+			emitterComponent->TimeSinceLastSpawn = 0;
 		}
 		
 		std::list<ParticleData>::iterator it;
@@ -54,7 +53,7 @@ void Systems::ParticleSystem::UpdateEntity(double dt, EntityID entity, EntityID
 			}
 
 			auto transformComponent = m_World->GetComponent<Components::Transform>(particleID, "Transform");
-			float speed = 10 * dt;
+			float speed = 20 * dt;
 			transformComponent->Position.x += it->Direction.x * speed;
 			transformComponent->Position.y += it->Direction.y * speed;
 			transformComponent->Position.z += it->Direction.z * speed;
@@ -92,14 +91,16 @@ void Systems::ParticleSystem::RegisterComponents(ComponentFactory* cf)
 	cf->Register("Particle", []() { return new Components::Particle(); });
 }
 
-void Systems::ParticleSystem::SpawnParticles(EntityID emitterID, float spawnCount, float spreadAngle)
+void Systems::ParticleSystem::SpawnParticles(EntityID emitterID, glm::vec3 pos, float spawnCount, float spreadAngle)
 {
 	for(int i = 0; i < spawnCount; i++)
 	{
 		auto ent = m_World->CreateEntity();
 		
 		auto transform = m_World->AddComponent<Components::Transform>(ent, "Transform");
-		transform->Position = glm::vec3(0, 20, 0);
+		transform->Position.x = pos.x;
+		transform->Position.y = pos.y;
+		transform->Position.z = pos.z;
 		transform->Scale = glm::vec3(1, 1, 0);
 		
 		auto particle = m_World->AddComponent<Components::Particle>(ent, "Particle");
@@ -134,7 +135,6 @@ void Systems::ParticleSystem::SpawnParticles(EntityID emitterID, float spawnCoun
 
 		m_ParticleEmitter[emitterID].push_back(data);
 	}
-	//std::cout<<"Added "<<spawnCount<<" particles..."<<std::endl;
 }
 
 

src/Systems/ParticleSystem.h

@@ -34,9 +34,9 @@ public:
 	void UpdateEntity(double dt, EntityID entity, EntityID parent) override;
 	void Draw(double dt);
 private:
-	void SpawnParticles(EntityID emitterID, float spawnCount, float spreadAngle);
+	void SpawnParticles(EntityID emitterID, glm::vec3 pos, float spawnCount, float spreadAngle);
 	std::map<EntityID, std::list<ParticleData>> m_ParticleEmitter;
-	double m_TimeSinceLastSpawn;
+	std::map<EntityID, double> m_TimeSinceLastSpawn;
 	
 };