InstantiateDynamicSlice issue

Question

Hi,

in Lumberyard 1.16 transform is not applying to root entity, when I try to instantiate dynamic slice:

```
	EBUS_EVENT_RESULT(ticket,
AzFramework::GameEntityContextRequestBus,
InstantiateDynamicSlice, asset,
AZ::Transform::CreateTranslation(AZ::Vector3(10.0f, 0.0f, 0.0f)),
nullptr/*customIdMapper*/);
```
Edit:

The reason for this is the mismatch of transform components.

Using the method described above, the created entity contains **AzToolsFramework::Components::TransformComponent**, but the checking happens with **AzFramework::TransformComponent**(GameEntityContextComponent.cpp line 455).

Accepted Answer

The problem was in the wrong asset extension:

```

// wrong
const char* assetPath = "Slices/Player.slice";
// correct (even though the file on the disk is named Player.slice)
const char* assetPath = "Slices/Player.dynamicslice";
AZ::Data::AssetId assetId;
EBUS_EVENT_RESULT(assetId,
AZ::Data::AssetCatalogRequestBus,
GetAssetIdByPath,
assetPath,
AZ::AzTypeInfo::Uuid()/*typeToRegister*/,
false/*autoRegisterIfNotFound*/);
AZ_Assert(assetId.IsValid(), "Asset is not found.");
AZ::Data::Assetasset;
asset.Create(assetId, true/*queueLoad*/);
AZ_Assert(asset.GetId().IsValid(), "Asset is not created.");
```

Answer

Transform is applying if i set it in OnSliceInstantiated:

```
  ...
// Set initial transform for slice root entity
for (AZ::Entity* entity : address.second->GetInstantiated()->m_entities)
{
AZ::EntityId parentId; EBUS_EVENT_ID_RESULT(parentId,entity->GetId(),AZ::TransformBus,GetParentId);
if (!parentId.IsValid())
{
EBUS_EVENT_ID(entity->GetId(),
AZ::TransformBus,
SetWorldTM,
sliceInfo.transform);
break;
}
}
```
but that is workaround and does not solve the issue which I described above.

Answer

I made global Spawner for my systemcomponent like so

```
  void LyTanksSystemComponent::SpawnSlice(const AZStd::string & sliceName, const AZ::Vector3 & pos)
{
AZ::Data::AssetId sliceAssetId;
EBUS_EVENT_RESULT(sliceAssetId, AZ::Data::AssetCatalogRequestBus, GetAssetIdByPath, sliceName.c_str(), AZ::AzTypeInfo::Uuid(), true);
if (sliceAssetId.IsValid())
{
// Using the valid ID, find the actual slice asset
AZ::Data::Asset sliceAsset;
sliceAsset.Create(sliceAssetId, true);
if (sliceAsset.GetId().IsValid())
{
AZ::Transform transform(AZ::Transform::CreateTranslation(pos));
using namespace AzFramework;
static EntityContextId gameEntityContextId = EntityContextId::CreateNull();
if (gameEntityContextId.IsNull())
{
GameEntityContextRequestBus::BroadcastResult(gameEntityContextId, &GameEntityContextRequestBus::Events::GetGameEntityContextId);
}
SliceInstantiationTicket ticket;
ticket.m_contextId = gameEntityContextId;
GameEntityContextRequestBus::BroadcastResult(ticket, &GameEntityContextRequestBus::Events::InstantiateDynamicSlice, sliceAsset, transform, nullptr);
//LmbrCentral::SpawnerComponentRequestBus::EventResult(ticket, m_childEntity->GetId(), &LmbrCentral::SpawnerComponentRequestBus::Events::SpawnSliceAbsolute, sliceAsset, transform);
SliceInstantiationResultBus::MultiHandler::BusConnect(ticket);
}
}
}
```

Answer

Hi @REDACTEDUSER

Answer

I guess it spawns at 0,0,0.

Edit:

You can replicate the error if you setup SpawnerComponent from c++ side:

```

AZ::Entity* entity = aznew AZ::Entity("AnyName");
// from CustomComponent call SpawnerComponent::SpawnSliceAbsolute
entity->CreateComponent(); entity->CreateComponent(LmbrCentral::SpawnerComponentTypeId);
entity->Init();
entity->Activate();
AZ::Data::AssetId assetId;
EBUS_EVENT_RESULT(assetId,
AZ::Data::AssetCatalogRequestBus,
GetAssetIdByPath,
slicePath,
AZ::AzTypeInfo::Uuid()/*typeToRegister*/,
false/*autoRegisterIfNotFound*/);
AZ_Assert(assetId.IsValid(), "Slice is not found.");
AZ::Data::Assetasset;
asset.Create(assetId, true/*queueLoad*/);
AZ_Assert(asset.GetId().IsValid(), "Asset is not created.");
EBUS_EVENT_ID(entity->GetId(),
LmbrCentral::SpawnerComponentRequestBus,
SetDynamicSlice, asset);
```

Answer

yeah, I faced with almost similar issue, here [https://forums.awsgametech.com/t/on-what-ebus-event-the-transform-component-with-entitys-childrens-are-ready-for-grab-for-internal-logic/5995/1](https://forums.awsgametech.com/t/on-what-ebus-event-the-transform-component-with-entitys-childrens-are-ready-for-grab-for-internal-logic/5995/1) (components are not ready for using) You may try to use **OnSliceInstantiated** instead OnSlicePreInstantiate on the OnSliceInstantiated notification from SpawnerComponent. I'm catching all instanced bullets(if you need only root of each spawned Slice use m_mataentities) and apply for each bullet some initial impulse like so ``` void EnemyTankComponent::OnSliceInstantiated(const AZ::Data::AssetId & assetId, const AZ::SliceComponent::SliceInstanceAddress & address) { for (AZ::Entity* spawnedEntity : address.second->GetInstantiated()->m_entities) { if (spawnedEntity) { AzFramework::PhysicsComponentRequestBus::Event(spawnedEntity->GetId(), &AzFramework::PhysicsComponentRequestBus::Events::SetMass, m_bullet_mass); AZ::Vector3 forward = m_modules[TankModule::SPAWN]->GetTransform()->GetWorldTM().GetBasisY(); ////AZ::Transform tm = m_entity->GetTransform()->GetWorldTM().GetInverseFast(); ////AZ::Vector3 forward = AZ::Vector3(0.0f, 1.0f, 0.0f) * tm; AzFramework::PhysicsComponentRequestBus::Event(spawnedEntity->GetId(), &AzFramework::PhysicsComponentRequestBus::Events::AddImpulse, forward * m_bullet_impulse); } } }
```

Answer

Hey guys,

I appreciate your assistance!

So far Fluffy's function has same result as mine and SpawnerComponent::SpawnSliceAbsolute works fine.

By the way, I have noticed that in my case in OnSlicePreInstantiate for some reason the transform component appears not to be found.(GameEntityContextComponent.cpp line 455).

InstantiateDynamicSlice issue

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