/// <summary>
/// This method will handle the cloning of Hybrid Components (if any) during the batched instantiation of an Entity
/// </summary>
/// <param name="obj">The Hybrid Component. We don't know for sure it's a component to clone or to reference, this method is also about detecting this use case and the return value will give us the info</param>
/// <param name="srcStore">Source Managed Store of the entity to instantiate</param>
/// <param name="dstArch">Destination archetype of the entity to instantiate</param>
/// <param name="dstStore">Destination Managed Store that will own the instances we create</param>
/// <param name="dstManagedArrayIndex">Index of the Hybrid Component associated with <paramref name="obj"/></param>
/// <param name="dstChunkCapacity">Chunk capacity</param>
/// <param name="srcEntity">Entity to instantiate</param>
/// <param name="dstEntities">Array containing all the entities instantiated</param>
/// <param name="dstTypeIndex">Destination type index</param>
/// <param name="dstBaseIndex">Destination base index</param>
/// <param name="gameObjectInstances">An array that will contain all the cloned Game Object companion. This method will fill this array at the first call for a Hybrid Component to clone and will be used for subsequent ones</param>
/// <returns><c>true</c> if the <paramref name="obj"/> was meant to be cloned, <c>false</c> if it is meant to be referenced</returns>
static bool InstantiateHybridComponentDelegate(object obj, ManagedComponentStore srcStore,
Archetype *dstArch, ManagedComponentStore dstStore, int dstManagedArrayIndex, int dstChunkCapacity,
Entity srcEntity, NativeArray <Entity> dstEntities, int dstTypeIndex, int dstBaseIndex, ref object[] gameObjectInstances)
{
// For now, it only makes sense to support a conversion that happens in the same world
// If whenever that changes, this assert will warn us it's not supported
Assert.AreEqual(srcStore, dstStore, "Companion GameObject instancing assumes the src and dst EntityManager are the same, are you instancing across worlds?");
// This method is only about cloning Hybrid Components: if it's not a component we have nothing to do
var unityComponent = obj as UnityEngine.Component;
if (unityComponent == null)
{
return(false);
}
// This method is only about cloning Hybrid Components: if there's no Companion Link it means there's nothing to clone
// This can still be a valid use case, the entity might be storing references to external Hybrid Components (e.g. first stage of conversion)
var companionLink = unityComponent.gameObject.GetComponent <CompanionLink>();
if (companionLink == null)
{
return(false);
}
// The instantiation works in two phases:
// 1) The first call on this method will clone the GameObject that owns the Hybrid Components for each instance we have to create and make it a Companion Game Object by attaching a CompanionLink component to it
// 2) The first and all other calls will add the Hybrid Managed Component we cloned to the entity
// 1) We know it's the first call if the array is null, it means we have to clone the GameObject for dstEntities.Length times and make it a Companion Game Object by adding a CompanionLink to it
// Cloning the Game Object will also clone its components, which is exactly what we're looking for.
// Note that we are relaxed with the content of the Game Object we clone: it may contains more than we need regarding the association with the Entity, but that's what we want,
// if the user adds Components to the Game Object that are not used by the entity: so be it, the user will still have these components in the instantiated Game Objects
if (gameObjectInstances == null)
{
gameObjectInstances = new object[dstEntities.Length];
for (int i = 0; i < dstEntities.Length; ++i)
{
var instance = GameObject.Instantiate(unityComponent.gameObject);
instance.name = CompanionLink.GenerateCompanionName(dstEntities[i]);
gameObjectInstances[i] = instance;
instance.hideFlags |= HideFlags.HideInHierarchy;
}
}
// For each instance we create, we add the cloned Hybrid Component to the entity
for (int i = 0; i < dstEntities.Length; i++)
{
var componentInInstance = ((GameObject)gameObjectInstances[i]).GetComponent(obj.GetType());
dstStore.SetManagedObject(dstArch, dstManagedArrayIndex, dstChunkCapacity, dstTypeIndex, dstBaseIndex + i, componentInInstance);
}
return(true);
}
/// <summary>
/// This method will handle the cloning of Hybrid Components (if any) during the batched instantiation of an Entity
/// </summary>
/// <param name="srcArray">Array of source managed component indices. One per <paramref name="componentCount"/></param>
/// <param name="componentCount">Number of component being instantiated</param>
/// <param name="dstEntities">Array of destination entities. One per <paramref name="instanceCount"/></param>
/// <param name="dstArray">Array of destination managed component indices. One per <paramref name="componentCount"/>*<paramref name="instanceCount"/>. All indices for the first component stored first etc.</param>
/// <param name="instanceCount">Number of instances being created</param>
/// <param name="managedComponentStore">Managed Store that owns the instances we create</param>
static void InstantiateHybridComponentDelegate(int *srcArray, int componentCount, Entity *dstEntities, int *dstArray, int instanceCount, ManagedComponentStore managedComponentStore)
{
object[] gameObjectInstances = null;
for (int src = 0; src < componentCount; ++src)
{
object sourceComponent = managedComponentStore.GetManagedComponent(srcArray[src]);
if ((sourceComponent as UnityEngine.Component)?.gameObject.GetComponent <CompanionLink>() == null)
{
for (int i = 0; i < instanceCount; ++i)
{
managedComponentStore.SetManagedComponentValue(dstArray[i], sourceComponent);
}
}
else
{
var unityComponent = (UnityEngine.Component)sourceComponent;
if (gameObjectInstances == null)
{
gameObjectInstances = new object[instanceCount];
for (int i = 0; i < instanceCount; ++i)
{
var instance = GameObject.Instantiate(unityComponent.gameObject);
instance.name = CompanionLink.GenerateCompanionName(dstEntities[i]);
gameObjectInstances[i] = instance;
instance.hideFlags |= HideFlags.HideInHierarchy;
}
}
for (int i = 0; i < instanceCount; i++)
{
var componentInInstance = ((GameObject)gameObjectInstances[i]).GetComponent(unityComponent.GetType());
managedComponentStore.SetManagedComponentValue(dstArray[i], componentInInstance);
}
}
dstArray += instanceCount;
}
}
/// <summary>
/// This method will handle the cloning of Hybrid Components (if any) during the batched instantiation of an Entity
/// </summary>
/// <param name="srcArray">Array of source managed component indices. One per <paramref name="componentCount"/></param>
/// <param name="componentCount">Number of component being instantiated</param>
/// <param name="dstEntities">Array of destination entities. One per <paramref name="instanceCount"/></param>
/// <param name="dstCompanionLinkIndices">Array of destination CompanionLink indices, can be null if the hybrid components are not owned</param>
/// <param name="dstArray">Array of destination managed component indices. One per <paramref name="componentCount"/>*<paramref name="instanceCount"/>. All indices for the first component stored first etc.</param>
/// <param name="instanceCount">Number of instances being created</param>
/// <param name="managedComponentStore">Managed Store that owns the instances we create</param>
static void InstantiateHybridComponentDelegate(int *srcArray, int componentCount, Entity *dstEntities, int *dstCompanionLinkIndices, int *dstArray, int instanceCount, ManagedComponentStore managedComponentStore)
{
if (dstCompanionLinkIndices != null)
{
var dstCompanionGameObjects = new GameObject[instanceCount];
for (int i = 0; i < instanceCount; ++i)
{
var companionLink = (CompanionLink)managedComponentStore.GetManagedComponent(dstCompanionLinkIndices[i]);
dstCompanionGameObjects[i] = companionLink.Companion;
CompanionLink.SetCompanionName(dstEntities[i], dstCompanionGameObjects[i]);
}
for (int src = 0; src < componentCount; ++src)
{
var componentType = managedComponentStore.GetManagedComponent(srcArray[src]).GetType();
for (int i = 0; i < instanceCount; i++)
{
var componentInInstance = dstCompanionGameObjects[i].GetComponent(componentType);
var dstIndex = src * instanceCount + i;
managedComponentStore.SetManagedComponentValue(dstArray[dstIndex], componentInInstance);
}
}
}
else
{
for (int src = 0; src < componentCount; ++src)
{
var component = managedComponentStore.GetManagedComponent(srcArray[src]);
for (int i = 0; i < instanceCount; i++)
{
var dstIndex = src * instanceCount + i;
managedComponentStore.SetManagedComponentValue(dstArray[dstIndex], component);
}
}
}
}