Added velocity interpolation

src/Systems/ParticleSystem.cpp

@@ -4,6 +4,11 @@
 
 #include "World.h"
 
+Systems::ParticleSystem::ParticleSystem(World *m_World) : System(m_World)
+{
+	m_TimeSinceLastSpawn = 0;
+}
+
 void Systems::ParticleSystem::Update(double dt)
 {
 	m_TimeSinceLastSpawn += dt;
@@ -23,13 +28,14 @@ void Systems::ParticleSystem::UpdateEntity(double dt, EntityID entity, EntityID
 			SpawnParticles(entity, emitterComponent->SpawnCount, emitterComponent->SpreadAngle);
 			m_TimeSinceLastSpawn = 0;
 		}
-		
+		std::cout<<m_TimeSinceLastSpawn<<std::endl;
 		std::list<ParticleData>::iterator it;
 		for(it = m_ParticleEmitter[entity].begin(); it == m_ParticleEmitter[entity].end();)
 		{
 			auto particleComponent = m_World->GetComponent<Components::Particle>(it->ParticleID, "Particle");
 			
-			int timeLived = glfwGetTime() - it->SpawnTime; 
+			double timeLived = glfwGetTime() - it->SpawnTime; 
+			std::cout<<timeLived<<std::endl;
 			if(timeLived > particleComponent->LifeTime)
 			{
 				m_ParticleEmitter[entity].erase(it);
@@ -51,9 +57,17 @@ void Systems::ParticleSystem::UpdateEntity(double dt, EntityID entity, EntityID
 			deltaColor = glm::abs(particleComponent->ColorSpectrum[0].b - particleComponent->ColorSpectrum[1].b);
 			it->color.b = particleComponent->ColorSpectrum[0].b + deltaColor * timeProgress;
 
-			//Interpolates the scale for the particle
+			//Interpolates the scale of the particle
 			float deltaScale = glm::abs(particleComponent->ScaleSpectrum[0] - particleComponent->ScaleSpectrum[1]);
 			it->Scale = particleComponent->ScaleSpectrum[0] + deltaScale * timeProgress;
+
+			//Interpolates the velocity of the particle
+			float deltaVelocity = glm::abs(particleComponent->VelocitySpectrum[0].x - particleComponent->VelocitySpectrum[1].x);
+			it->Velocity.x = particleComponent->VelocitySpectrum[0].x + deltaVelocity * timeProgress;
+			deltaVelocity = glm::abs(particleComponent->VelocitySpectrum[0].y - particleComponent->VelocitySpectrum[1].y);
+			it->Velocity.y = particleComponent->VelocitySpectrum[0].y + deltaVelocity * timeProgress;	
+			deltaVelocity = glm::abs(particleComponent->VelocitySpectrum[0].z - particleComponent->VelocitySpectrum[1].z);
+			it->Velocity.z = particleComponent->VelocitySpectrum[0].z + deltaVelocity * timeProgress;
 		}
 	}
 }
@@ -75,13 +89,15 @@ void Systems::ParticleSystem::SpawnParticles(EntityID emitterID, float spawnCoun
 		transform->Position = glm::vec3(0);
 		
 		auto particle = m_World->AddComponent<Components::Particle>(ent, "Particle");
-		particle->LifeTime = 4;
+		particle->LifeTime = 4000;
 		Color startColor = {.4f, .45f, .2f};
 		particle->ColorSpectrum.push_back(startColor);
 		Color endColor = {0.f, 45.f, 23.f};
 		particle->ColorSpectrum.push_back(endColor);
 		particle->ScaleSpectrum.push_back(1);
 		particle->ScaleSpectrum.push_back(30);
+		particle->VelocitySpectrum.push_back(glm::vec3(0, -.2, 0));
+		particle->VelocitySpectrum.push_back(glm::vec3(0, -3, 0));
 
 		ParticleData data;
 		data.ParticleID = ent;