public void Update_ShouldExecuteEngineSystemsInCorrectOrder()
{
// Arrange
GameTime.FixedDeltaTime = TimeSpan.FromSeconds(0.1);
var gameTime = new GameTime(TimeSpan.FromSeconds(0.15));
_gameTimeProvider.GetGameTime().Returns(gameTime);
var scene = TestSceneFactory.Create();
_sceneManager.CurrentScene.Returns(scene);
var gameLoop = GetGameLoop();
// Act
gameLoop.Update();
// Assert
Received.InOrder(() =>
{
_inputSystem.Received(1).ProcessInput(scene);
_behaviorSystem.Received(1).ProcessBehaviorFixedUpdate(scene);
_customSystem1.Received(1).ProcessFixedUpdate(scene);
_customSystem2.Received(1).ProcessFixedUpdate(scene);
_customSystem3.Received(1).ProcessFixedUpdate(scene);
_physicsSystem.Received(1).ProcessPhysics(scene);
_entityDestructionSystem.Received(1).DestroyEntitiesAfterFixedTimeStep(scene);
_behaviorSystem.Received(1).ProcessBehaviorUpdate(scene, gameTime);
_customSystem1.Received(1).ProcessUpdate(scene, gameTime);
_customSystem2.Received(1).ProcessUpdate(scene, gameTime);
_customSystem3.Received(1).ProcessUpdate(scene, gameTime);
_physicsSystem.Received(1).PreparePhysicsDebugInformation();
_audioSystem.Received(1).ProcessAudio(scene);
_animationSystem.Received(1).ProcessAnimations(scene, gameTime);
_renderingSystem.Received(1).RenderScene(scene);
_entityDestructionSystem.Received(1).DestroyEntitiesAfterFullFrame(scene);
});
}
public void Update()
{
_sceneManager.OnNextFrame();
var scene = _sceneManager.CurrentScene;
Debug.Assert(scene != null, nameof(scene) + "scene != null");
var gameTime = _gameTimeProvider.GetGameTime();
_timeToSimulate += gameTime.DeltaTime;
var fixedUpdatesPerFrame = 0;
while (_timeToSimulate >= GameTime.FixedDeltaTime && (fixedUpdatesPerFrame < _fixedUpdatesPerFrameLimit || _fixedUpdatesPerFrameLimit == 0))
{
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.InputSystemName))
{
_engineSystems.InputSystem.ProcessInput(scene);
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.BehaviorSystemName))
{
_engineSystems.BehaviorSystem.ProcessBehaviorFixedUpdate(scene);
}
foreach (var customSystem in _engineSystems.CustomSystems)
{
using (_performanceStatisticsRecorder.RecordSystemExecution(customSystem.Name))
{
customSystem.ProcessFixedUpdate(scene);
}
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.PhysicsSystemName))
{
_engineSystems.PhysicsSystem.ProcessPhysics(scene);
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.EntityDestructionSystemName))
{
_engineSystems.EntityDestructionSystem.DestroyEntitiesAfterFixedTimeStep(scene);
}
_timeToSimulate -= GameTime.FixedDeltaTime;
fixedUpdatesPerFrame++;
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.BehaviorSystemName))
{
_engineSystems.BehaviorSystem.ProcessBehaviorUpdate(scene, gameTime);
}
foreach (var customSystem in _engineSystems.CustomSystems)
{
using (_performanceStatisticsRecorder.RecordSystemExecution(customSystem.Name))
{
customSystem.ProcessUpdate(scene, gameTime);
}
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.PhysicsSystemName))
{
_engineSystems.PhysicsSystem.PreparePhysicsDebugInformation();
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.AudioSystemName))
{
_engineSystems.AudioSystem.ProcessAudio(scene);
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.AnimationSystemName))
{
_engineSystems.AnimationSystem.ProcessAnimations(scene, gameTime);
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.RenderingSystemName))
{
_engineSystems.RenderingSystem.RenderScene(scene);
}
using (_performanceStatisticsRecorder.RecordSystemExecution(_engineSystems.EntityDestructionSystemName))
{
_engineSystems.EntityDestructionSystem.DestroyEntitiesAfterFullFrame(scene);
}
_performanceStatisticsRecorder.RecordFrame();
_coreDiagnosticInfoProvider.UpdateDiagnostics(scene);
}