有没有办法模仿ScriptableObjects中的MonoBehaviour复制语义?
假设我有这样的MonoBehaviour:
public class DummyClassBehaviour : MonoBehaviour {
public DummyClass DummyClassTest; //ScriptableObject
public DummyClassBehaviour DummyBehaviourTest; //Another DummyClassBehaviour
}
和一个ScriptableObject:
public class DummyClass : ScriptableObject {
public string Text = "";
}
当我复制(CTRL + D)附有DummyClassBehaviour的GameObject时,'DummyBehaviourTest'如您所愿复制:如果它在我要复制的GameObject中引用MonoBehaviour,则复制机制会将引用更新为相同的MonoBehaviour类型。新的GameObject。如果它在另一个GameObject中引用MonoBehaviour,则该引用保持不变。
另一方面,ScriptableObject始终引用原始脚本。因此,我最终得到了N个GameObject,它们都与原始GameObject共享相同的ScriptableObject(DummyClass)。我正在使用ScriptableObjects来允许非Monobehaviour数据类的序列化。
最佳答案
据我所知,如果我错了,请有人纠正我,您将无法修改ScriptableObject的序列化行为以匹配MonoBehaviour的序列化行为。即,如果重复,它应该更新引用。
相反,我选择了一个并非最优的解决方案,但是它可以工作。我的课分配了一个唯一的标识符,该标识符与其他所有事物一样被序列化。我在DummyBehaviour.Awake()中使用此ID创建一个查找表,然后可以使用该表重新分配我的DummyClass。
我不会接受我自己的答案,因为我认为它不能完全回答我的原始问题,但它与以下内容有关:
[System.Serializable]
public class DummyClass {
// Unique id is assigned by DummyBehaviour and is unique to the game object
// that DummyBehaviour is attached to.
public int UniqueID = -1;
public string Text = "";
// Override GetHashCode so Dictionary lookups
public override int GetHashCode(){
int hash = 17;
hash = hash * 31 + UniqueID;
return hash;
}
// override equality function, allows dictionary to do comparisons.
public override bool Equals(object obj)
{
if (object.ReferenceEquals(obj, null))return false;
DummyClass item = obj as DummyClass;
return item.UniqueID == this.UniqueID;
}
// Allow checks of the form 'if(dummyClass)'
public static implicit operator bool(DummyClass a)
{
if (object.ReferenceEquals(a, null)) return false;
return (a.UniqueID==-1)?false:true;
}
public static bool operator ==(DummyClass a, DummyClass b)
{
if (object.ReferenceEquals(a, null))
{
return object.ReferenceEquals(b, null);
}
return a.Equals(b);
}
public static bool operator !=(DummyClass a, DummyClass b)
{
if (object.ReferenceEquals(a, null))
{
return object.ReferenceEquals(b, null);
}
return !a.Equals(b);
}
}
而我的MonoBehaviour:
[ExecuteInEditMode]
public class DummyBehaviour : MonoBehaviour {
public List<DummyClass> DummyClasses = new List<DummyClass>();
// reassign references based on uniqueid.
void Awake(){
Dictionary<DummyClass,DummyClass> dmap = new Dictionary<DummyClass,DummyClass>();
// iterate over all dummyclasses, reassign references.
for(int i = 0; i < DummyClasses.Count; i++){
DummyClass2 d = DummyClasses[i];
if(dmap.ContainsKey(d)){
DummyClasses[i] = dmap[d];
} else {
dmap[d] = d;
}
}
DummyClasses[0].Text = "All items same";
}
// helper function, for inspector contextmenu, to add more classes from Editor
[ContextMenu ("AddDummy")]
void AddDummy(){
if(DummyClasses.Count==0)DummyClasses.Add(new DummyClass{UniqueID = 1});
else {
// Every item after 0 points to zero, serialization will remove refs during deep copy.
DummyClasses.Add(DummyClasses[0]);
}
UnityEditor.EditorUtility.SetDirty(this);
}
}