adding physics tick time to post simulate event (#1401)

Code/Framework/AzFramework/AzFramework/Physics/Common/PhysicsEvents.h

@@ -48,7 +48,8 @@ namespace AzPhysics
         using OnPresimulateEvent = AZ::Event<float>;
 
         //! Event triggers at the end of the SystemInterface::Simulate call.
-        using OnPostsimulateEvent = AZ::Event<>;
+        //! Parameter is the total time that the physics system will run for during the Simulate call.
+        using OnPostsimulateEvent = AZ::Event<float>;
 
         //! Event trigger when a Scene is added to the simulation.
         //! When triggered will send the handle to the new Scene.

Code/Framework/AzFramework/AzFramework/Physics/PhysicsSystem.cpp

@@ -43,7 +43,7 @@ namespace AzPhysics
             const AZ::BehaviorAzEventDescription postsimulateEventDescription =
             {
                 "Postsimulate event",
-                {} // Parameters
+                {"Tick time"} // Parameters
             };
 
             behaviorContext->Class<SystemInterface>("System Interface")

Gems/PhysX/Code/Source/System/PhysXSystem.cpp

@@ -198,7 +198,7 @@ namespace PhysX
 
             simulateScenes(tickTime);
         }
-        m_postSimulateEvent.Signal();
+        m_postSimulateEvent.Signal(tickTime);
     }
 
     AzPhysics::SceneHandle PhysXSystem::AddScene(const AzPhysics::SceneConfiguration& config)

Gems/PhysX/Code/Tests/PhysXSystemTests.cpp

@@ -219,8 +219,9 @@ namespace PhysX
                 preSimEventCount++;
             });
         AzPhysics::SystemEvents::OnPostsimulateEvent::Handler postSimEvent(
-            [&postSimEventCount]()
+            [&expectedTickTime, &postSimEventCount](float deltaTime)
             {
+                EXPECT_NEAR(expectedTickTime, deltaTime, 0.001f);
                 postSimEventCount++;
             });
         physicsSystem->RegisterPreSimulateEvent(preSimEvent);