自动生成地图 物体 Generator

using UnityEngine;

using System.Collections;

using System.Collections.Generic;

public class Generator : MonoBehaviour {

public GameObject[] availableRooms;

public List<GameObject> currentRooms;

private float screenWidthInPoints;

public GameObject[] availableObjects;    
public List<GameObject> objects;

public float objectsMinDistance = 5.0f;    
public float objectsMaxDistance = 10.0f;

public float objectsMinY = -1.4f;
public float objectsMaxY = 1.4f;

public float objectsMinRotation = -45.0f;
public float objectsMaxRotation = 45.0f;

// Use this for initialization
void Start () {
float height = 2.0f * Camera.main.orthographicSize;
screenWidthInPoints = height * Camera.main.aspect;
}

// Update is called once per frame
void FixedUpdate () 
{    
GenerateRoomIfRequired();
GenerateObjectsIfRequired();
}

void GenerateRoomIfRequired()
{
//1
List<GameObject> roomsToRemove = new List<GameObject>();

//2
bool addRooms = true;        

//3
float playerX = transform.position.x;

//4
float removeRoomX = playerX - screenWidthInPoints;        

//5
float addRoomX = playerX + screenWidthInPoints;

//6
float farthestRoomEndX = 0;

foreach(var room in currentRooms)
{
//7
float roomWidth = room.transform.FindChild("floor").localScale.x;
float roomStartX = room.transform.position.x - (roomWidth * 0.5f);    
float roomEndX = roomStartX + roomWidth;                            

//8
if (roomStartX > addRoomX)
addRooms = false;

//9
if (roomEndX < removeRoomX)
roomsToRemove.Add(room);

//10
farthestRoomEndX = Mathf.Max(farthestRoomEndX, roomEndX);
}

//11
foreach(var room in roomsToRemove)
{
currentRooms.Remove(room);
Destroy(room);            
}

//12
if (addRooms)
AddRoom(farthestRoomEndX);
}

void AddRoom(float farhtestRoomEndX)
{
//1
int randomRoomIndex = Random.Range(0, availableRooms.Length);

//2
GameObject room = (GameObject)Instantiate(availableRooms[randomRoomIndex]);

//3
float roomWidth = room.transform.FindChild("floor").localScale.x;

//4
float roomCenter = farhtestRoomEndX + roomWidth * 0.5f;

//5
room.transform.position = new Vector3(roomCenter, 0, 0);

//6
currentRooms.Add(room);         
}

void GenerateObjectsIfRequired()
{
//1
float playerX = transform.position.x;        
float removeObjectsX = playerX - screenWidthInPoints;
float addObjectX = playerX + screenWidthInPoints;
float farthestObjectX = 0;

//2
List<GameObject> objectsToRemove = new List<GameObject>();

foreach (var obj in objects)
{
//3
float objX = obj.transform.position.x;

//4
farthestObjectX = Mathf.Max(farthestObjectX, objX);

//5
if (objX < removeObjectsX)            
objectsToRemove.Add(obj);
}

//6
foreach (var obj in objectsToRemove)
{
objects.Remove(obj);
Destroy(obj);
}

//7
if (farthestObjectX < addObjectX)
AddObject(farthestObjectX);
}

void AddObject(float lastObjectX)
{
//1
int randomIndex = Random.Range(0, availableObjects.Length);

//2
GameObject obj = (GameObject)Instantiate(availableObjects[randomIndex]);

//3
float objectPositionX = lastObjectX + Random.Range(objectsMinDistance, objectsMaxDistance);
float randomY = Random.Range(objectsMinY, objectsMaxY);
obj.transform.position = new Vector3(objectPositionX,randomY,0); 

//4
float rotation = Random.Range(objectsMinRotation, objectsMaxRotation);
obj.transform.rotation = Quaternion.Euler(Vector3.forward * rotation);

//5
objects.Add(obj);            
}

}