Angle and spread on particle system. Need to make them not collide.

include/Core/Engine.h

@@ -137,6 +137,7 @@ public:
 
 
 		//OctoBall
+		/*
 		{
           	auto ent = m_World->CreateEntity();
         	std::shared_ptr<Components::Transform> transform = m_World->AddComponent<Components::Transform>(ent);
@@ -158,7 +159,7 @@ public:
 			plight->Radius = 2.f;
 
 			m_World->CommitEntity(ent);
-		}
+		}*/
 
 		//PointLightTest
 		{
@@ -224,10 +225,13 @@ public:
 			auto transform = m_World->AddComponent<Components::Transform>(Pe);
 			auto particleEmitter= m_World->AddComponent<Components::ParticleEmitter>(Pe);
 
-			transform->Position = glm::vec3(0.f, -5.f, -10.f);
+			transform->Position = glm::vec3(0.f, 0.f, -10.f);
 			particleEmitter->GravityScale = 0.0f;
-			particleEmitter->SpawnRate = 1.0f;
+			particleEmitter->SpawnRate = 0.1f;
-			particleEmitter->NumberOfTicks = 3.f;
+			particleEmitter->NumberOfTicks = 1000;
+			particleEmitter->Speed = 2.f;
+			particleEmitter->Spread = glm::pi<float>()/2;
+			particleEmitter->EmittingAngle = glm::pi<float>();
 
 			{
 				auto Pt = m_World->CreateEntity(Pe);
@@ -236,11 +240,11 @@ public:
 				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->Velocity = glm::vec3(1.0f, 0.f, 0.f);
 				PtTransform->Position = transform->Position;
 				PtSprite->SpriteFile = "Textures/Test/Water.png";
 				PtParticle->LifeTime = 5.f;
-				PtParticle->Flags = ParticleFlags::Type::powderParticle;
+				PtParticle->Flags = ParticleFlags::Type::staticPressureParticle;
 			}
 			m_World->CommitEntity(Pe);
 		}
@@ -368,7 +372,7 @@ public:
 			auto ent = m_World->CreateEntity();
 			m_World->SetProperty(ent, "Name", "Pad");
 			auto ctransform = m_World->AddComponent<Components::Transform>(ent);
-			ctransform->Position = glm::vec3(0.f, -3.5f, -10.f);
+			ctransform->Position = glm::vec3(0.f, -13.5f, -10.f);
 			ctransform->Scale = glm::vec3(1.0f, 1.0f, 1.f);
 			auto rectangle = m_World->AddComponent<Components::RectangleShape>(ent);
 			auto physics = m_World->AddComponent<Components::Physics>(ent);

include/Physics/CParticleEmitter.h

@@ -11,9 +11,12 @@ struct ParticleEmitter : public Component
 {
     int NumberOfTicks = 10.f;
     float InitialSpeed = 1.f;
-    double SpawnRate = 1.f;
+    double SpawnRate = 1;
     double TimeSinceLastSpawn = 0;
     int MaxCount = 0;
+    float EmittingAngle = 0.f;
+    float Spread = 0.f;
+    float Speed = 2.f;
 
     //ParticleSystem variables
     float GravityScale = 1.0f;

include/Physics/PhysicsSystem.h

@@ -2,6 +2,9 @@
 #define DAYDREAM_PHYSICSSYSTEM_H
 
 #include <unordered_map>
+#include <random>
+
+#include <glm/gtc/quaternion.hpp>
 
 #include "Core/System.h"
 #include "Core/World.h"
@@ -65,6 +68,8 @@ private:
 
     int m_VelocityIterations, m_PositionIterations;
 
+    std::mt19937 gen;
+
     std::unordered_map<EntityID, b2Body*> m_EntitiesToBodies;
     std::unordered_map<b2Body*, EntityID> m_BodiesToEntities;
 

src/game/Physics/PhysicsSystem.cpp

@@ -10,6 +10,9 @@ void dd::Systems::PhysicsSystem::RegisterComponents(ComponentFactory* cf)
 
 void dd::Systems::PhysicsSystem::Initialize()
 {
+    std::random_device rd;
+    gen = std::mt19937(rd());
+
     m_ContactListener = new ContactListener(this);
 
     m_Gravity = b2Vec2(0.f, -9.82f);
@@ -24,6 +27,8 @@ void dd::Systems::PhysicsSystem::Initialize()
 
     InitializeWater();
 
+
+
     EVENT_SUBSCRIBE_MEMBER(m_SetImpulse, PhysicsSystem::SetImpulse);
 }
 
@@ -382,7 +387,8 @@ void dd::Systems::PhysicsSystem::UpdateParticleEmitters(double dt)
             LOG_INFO("ParticleTemplate Component is nil.");
             continue;
         }
-
+        auto TempTransform = m_World->GetComponent<Components::Transform>(e);
+        TempTransform->Orientation = glm::rotate(glm::quat(), 3.f, glm::vec3(0.f, 0.f, -1.f));
 
         emitter->TimeSinceLastSpawn += dt;
         if(emitter->TimeSinceLastSpawn < emitter->SpawnRate || emitter->NumberOfTicks < 1) {
@@ -396,7 +402,15 @@ void dd::Systems::PhysicsSystem::UpdateParticleEmitters(double dt)
         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);
+        float eAngle = emitter->EmittingAngle;
+        float halfSpread = emitter->Spread / 2;
+
+        std::uniform_real_distribution<float> dis(eAngle-halfSpread, eAngle+halfSpread);
+        float pAngle = dis(gen);
+        LOG_INFO("Radian angle: %f", pAngle);
+        glm::vec2 unitVec = glm::normalize(glm::vec2(glm::cos(pAngle), glm::sin(pAngle)));
+        glm::vec2 vel = unitVec * emitter->Speed;
+        particleDef.velocity = b2Vec2(vel.x, vel.y);
         particleDef.position = b2Vec2(templateTransform->Position.x, templateTransform->Position.y);
 
 
@@ -405,7 +419,9 @@ void dd::Systems::PhysicsSystem::UpdateParticleEmitters(double dt)
         auto transform = m_World->GetComponent<Components::Transform>(particle);
         transform->Scale = glm::vec3 (particleTemplate->Radius * 2.f, particleTemplate->Radius * 2.f, 1);
 
+
         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));