Base PhysicsSystem.

include/Core/Physics/PhysicsSystem.h

@@ -0,0 +1,42 @@
+#ifndef DAYDREAM_PHYSICSSYSTEM_H
+#define DAYDREAM_PHYSICSSYSTEM_H
+
+#include "Core/System.h"
+#include <Box2D/Box2D.h>
+
+namespace dd
+{
+
+namespace Systems {
+
+
+class PhysicsSystem : public System {
+    PhysicsSystem(World* world, std::shared_ptr<dd::EventBroker> eventBroker)
+    : System(world, eventBroker) {}
+
+    ~PhysicsSystem();
+
+    void Initialize();
+
+    // Called once per system every tick
+    void Update(double dt);
+    // Called once for every entity in the world every tick
+    void UpdateEntity(double dt, EntityID entity, EntityID parent);
+
+    // Called when components are committed to an entity
+    void OnEntityCommit(EntityID entity);
+
+    // Called when an entity is removed
+    void OnEntityRemoved(EntityID entity);
+
+
+    b2Vec2 m_Gravity;
+    b2World* m_PhysicsWorld;
+    float m_TimeStep;
+    int m_VelocityIterations, m_PositionIterations;
+};
+
+}
+}
+
+#endif //DAYDREAM_PHYSICSSYSTEM_H