protected override void OnUpdate()
{
if (m_TimeData == null)
{
// Look for a valid Time reference (NB: assumes one UnityInstance!)
foreach (var world in World.All)
{
var timeSystem = world.GetExistingSystem <UpdateWorldTimeSystem>();
if (timeSystem == null)
{
continue;
}
m_TimeData = timeSystem.m_TimeData;
break;
}
if (m_TimeData == null)
{
throw new Exception(
"UpdateWorldTimeSystem must either be disabled "
+ "or initialized with SetInstanceTime(TimeData*) before use.");
}
}
// If elapsed time starts from a non-zero point in time, it can break assumptions made in other code
// (with Entities fixed time stepping logic being a prime example). Even if our code is protected against
// this, users will often expect elapsed time to accumulate from 0.
World.SetTime(*m_TimeData);
}
private UnityInstance()
{
m_World = DefaultWorldInitialization.Initialize("Default World");
m_BootPhase = BootPhase.Booting;
m_RunState = RunState.Resuming;
m_EntityManager = m_World.EntityManager;
m_StartTimeInSeconds = 0;
m_ElapsedTimeInSeconds = 0;
m_PreviousElapsedTimeInSeconds = 0;
m_SceneSystemGroup = m_World.GetOrCreateSystem <SceneSystemGroup>();
m_SceneSystem = m_World.GetOrCreateSystem <SceneSystem>();
m_TimeData = (TimeData *)UnsafeUtility.Malloc(
UnsafeUtility.SizeOf <TimeData>(),
0,
Collections.Allocator.Persistent);
}
private UnityInstance()
{
m_World = DefaultWorldInitialization.Initialize("Default World");
m_BootPhase = BootPhase.Booting;
m_RunState = RunState.Resuming;
m_EntityManager = m_World.EntityManager;
m_StartTimeInSeconds = 0;
m_ElapsedTimeInSeconds = 0;
m_PreviousElapsedTimeInSeconds = 0;
// try to find SceneSystemGroup in worlds
foreach (var w in World.All)
{
m_SceneSystemGroup = w.GetExistingSystem <SceneSystemGroup>();
m_SceneSystem = w.GetExistingSystem <SceneSystem>();
if (m_SceneSystemGroup != null)
{
break;
}
}
// if cannot find - create in the default world
if (m_SceneSystemGroup == null)
{
m_SceneSystemGroup = m_World.GetOrCreateSystem <SceneSystemGroup>();
m_SceneSystem = m_World.GetOrCreateSystem <SceneSystem>();
}
m_TimeData = (TimeData *)UnsafeUtility.Malloc(
UnsafeUtility.SizeOf <TimeData>(),
0,
Collections.Allocator.Persistent);
}
internal void SetInstanceTime(TimeData *timeData)
{
m_TimeData = timeData;
}
