C# Game Programming Cookbook for Unity 3D / Программирование игр на Unity 3D C#. Книга готовых решений.: 4.3.1.1 Разбор скрипта

Класс SpawnController наследуется от ScriptableObject:

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public class SpawnController : ScriptableObject
{

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private static SpawnController instance;
public SpawnController ()
{
// this function will be called whenever an instance of the
// SpawnController class is made
// first, we check that an instance does not already exist
// (this is a singleton, after all!) if (instance != null)
{
// drop out if instance exists, to avoid generating
// duplicates
Debug.LogWarning("Tried to generate more than one
instance of singleton SpawnController.");
return;
}
// as no instance already exists, we can safely set instance
// to this one instance = this;
}
public static SpawnController Instance
{
// to every other script, this getter setter is the way they
// get access to the singleton instance of this script
get
{
// the other script is trying to access an instance
// of this script, so we need to see if an instance
// already exists
if (instance == null)
{
// no instance exists yet, so we go ahead and
// create one
ScriptableObject.CreateInstance<SpawnController>(); // new SpawnController ();
}
// now we pass the reference to this instance back
// to the other script so it can communicate with it
return instance;
}
}
}

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public void Restart ()
{
playerTransforms=new ArrayList();
playerGameObjects=new ArrayList();
objectList=new ArrayList();
}

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public void SetUpPlayers (GameObject[] playerPrefabs, Vector3[]
playerStartPositions, Quaternion[] playerStartRotations, Transform
theParentObj, int totalPlayers)
{
// we pass in everything needed to spawn players and take
// care of spawning players in this class so that we don't // have to replicate this code in every game controller
playerPrefabList= playerPrefabs;
startPositions= playerStartPositions;
startRotations= playerStartRotations;
// call the function to take care of spawning all the
// players and putting them in the right places CreatePlayers( theParentObj, totalPlayers );
}

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public void CreatePlayers ( Transform theParent, int totalPlayers )
{
playerTransforms=new ArrayList();
playerGameObjects=new ArrayList();
for(int i=0; i<totalPlayers;i++)
{
// spawn a player
tempTrans= Spawn ( playerPrefabList[i],
startPositions[i], startRotations[i] );
// if we have passed in an object to parent the
// players to, set the parent
if(theParent!=null)
{
tempTrans.parent= theParent;
// as we are parented, let's set the local
// position
tempTrans.localPosition= startPositions[i];
}
// add this transform into our list of player
// transforms
playerTransforms.Add(tempTrans);
// add its gameobject into our list of player
// gameobjects (we cache them separately)
playerGameObjects.Add (tempTrans.gameObject);
}
}

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public GameObject GetPlayerGO (int indexNum)
{
return (GameObject)playerGameObjects[indexNum];
}

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public Transform GetPlayerTransform (int indexNum)
{
return (Transform)playerTransforms[indexNum];
}

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public Transform Spawn(GameObject anObject, Vector3 aPosition,
Quaternion aRotation)
{
if(objectList==null)
objectList=new ArrayList();
// instantiate the object
tempGO=(GameObject)Instantiate(anObject, aPosition,
aRotation);
tempTrans= tempGO.transform;
// store this object in our list of objects
objectList.Add(tempTrans);
// return the object to whatever was calling
return tempTrans;
}

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// here we just provide a convenient function to return the spawned
// objects gameobject rather than its transform public GameObject SpawnGO(GameObject anObject, Vector3 aPosition,
Quaternion aRotation)
{
if(objectList==null)
objectList=new ArrayList();
// instantiate the object
tempGO=(GameObject)Instantiate(anObject, aPosition,
aRotation);
tempTrans= tempGO.transform;
// store this object in our list of objects
objectList.Add(tempTrans);
// return the object to whatever was calling
return tempGO;
}

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public ArrayList GetAllSpawnedTransforms()
{
return objectList;
}
}

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