Unity无限地形实现类似跑步机效果 - 纳金网

using UnityEngine;
using System.Collections;
public class InfiniteTerrain : MonoBehaviour
{
public GameObject PlayerObject;
private Terrain[,] _terrainGrid = new Terrain[3,3];
void Start ()
{
Terrain linkedTerrain = gameObject.GetComponent<Terrain>();
_terrainGrid[0,0] = Terrain.CreateTerrainGameObject(linkedTerrain.terrainData).GetComponent<Terrain>();// 创建一个地形
_terrainGrid[0,1] = Terrain.CreateTerrainGameObject(linkedTerrain.terrainData).GetComponent<Terrain>();
_terrainGrid[0,2] = Terrain.CreateTerrainGameObject(linkedTerrain.terrainData).GetComponent<Terrain>();
_terrainGrid[1,0] = Terrain.CreateTerrainGameObject(linkedTerrain.terrainData).GetComponent<Terrain>();
_terrainGrid[1,1] = linkedTerrain;
_terrainGrid[1,2] = Terrain.CreateTerrainGameObject(linkedTerrain.terrainData).GetComponent<Terrain>();
_terrainGrid[2,0] = Terrain.CreateTerrainGameObject(linkedTerrain.terrainData).GetComponent<Terrain>();
_terrainGrid[2,1] = Terrain.CreateTerrainGameObject(linkedTerrain.terrainData).GetComponent<Terrain>();
_terrainGrid[2,2] = Terrain.CreateTerrainGameObject(linkedTerrain.terrainData).GetComponent<Terrain>();
UpdateTerrainPositionsAndNeighbors();
}
private void UpdateTerrainPositionsAndNeighbors()
{
_terrainGrid[0,0].transform.position = new Vector3(
_terrainGrid[1,1].transform.position.x - _terrainGrid[1,1].terrainData.size.x,
_terrainGrid[1,1].transform.position.y,
_terrainGrid[1,1].transform.position.z + _terrainGrid[1,1].terrainData.size.z);
_terrainGrid[0,1].transform.position = new Vector3(
_terrainGrid[1,1].transform.position.x - _terrainGrid[1,1].terrainData.size.x,
_terrainGrid[1,1].transform.position.y,
_terrainGrid[1,1].transform.position.z);
_terrainGrid[0,2].transform.position = new Vector3(
_terrainGrid[1,1].transform.position.x - _terrainGrid[1,1].terrainData.size.x,
_terrainGrid[1,1].transform.position.y,
_terrainGrid[1,1].transform.position.z - _terrainGrid[1,1].terrainData.size.z);
_terrainGrid[1,0].transform.position = new Vector3(
_terrainGrid[1,1].transform.position.x,
_terrainGrid[1,1].transform.position.y,
_terrainGrid[1,1].transform.position.z + _terrainGrid[1,1].terrainData.size.z);
_terrainGrid[1,2].transform.position = new Vector3(
_terrainGrid[1,1].transform.position.x,
_terrainGrid[1,1].transform.position.y,
_terrainGrid[1,1].transform.position.z - _terrainGrid[1,1].terrainData.size.z);
_terrainGrid[2,0].transform.position = new Vector3(
_terrainGrid[1,1].transform.position.x + _terrainGrid[1,1].terrainData.size.x,
_terrainGrid[1,1].transform.position.y,
_terrainGrid[1,1].transform.position.z + _terrainGrid[1,1].terrainData.size.z);
_terrainGrid[2,1].transform.position = new Vector3(
_terrainGrid[1,1].transform.position.x + _terrainGrid[1,1].terrainData.size.x,
_terrainGrid[1,1].transform.position.y,
_terrainGrid[1,1].transform.position.z);
_terrainGrid[2,2].transform.position = new Vector3(
_terrainGrid[1,1].transform.position.x + _terrainGrid[1,1].terrainData.size.x,
_terrainGrid[1,1].transform.position.y,
_terrainGrid[1,1].transform.position.z - _terrainGrid[1,1].terrainData.size.z);
_terrainGrid[0,0].SetNeighbors( null, null, _terrainGrid[1,0], _terrainGrid[0,1]);
_terrainGrid[0,1].SetNeighbors( null, _terrainGrid[0,0], _terrainGrid[1,1], _terrainGrid[0,2]);
_terrainGrid[0,2].SetNeighbors( null, _terrainGrid[0,1], _terrainGrid[1,2], null);
_terrainGrid[1,0].SetNeighbors(_terrainGrid[0,0], null, _terrainGrid[2,0], _terrainGrid[1,1]);
_terrainGrid[1,1].SetNeighbors(_terrainGrid[0,1], _terrainGrid[1,0], _terrainGrid[2,1], _terrainGrid[1,2]);
_terrainGrid[1,2].SetNeighbors(_terrainGrid[0,2], _terrainGrid[1,1], _terrainGrid[2,2], null);
_terrainGrid[2,0].SetNeighbors(_terrainGrid[1,0], null, null, _terrainGrid[2,1]);
_terrainGrid[2,1].SetNeighbors(_terrainGrid[1,1], _terrainGrid[2,0], null, _terrainGrid[2,2]);
_terrainGrid[2,2].SetNeighbors(_terrainGrid[1,2], _terrainGrid[2,1], null, null);
}
void Update ()
{
if (Time.frameCount % 10 != 0)
return;
Vector3 playerPosition = new Vector3(PlayerObject.transform.position.x, PlayerObject.transform.position.y, PlayerObject.transform.position.z);
Terrain playerTerrain = null;
int xOffset = 0;
int yOffset = 0;
for (int x = 0; x < 3; x++)
{
for (int y = 0; y < 3; y++)
{
// 过滤出当前的middle索引[x,y]
if ((playerPosition.x >= _terrainGrid[x,y].transform.position.x) &&
(playerPosition.x <= (_terrainGrid[x,y].transform.position.x + _terrainGrid[x,y].terrainData.size.x)) &&
(playerPosition.z >= _terrainGrid[x,y].transform.position.z) &&
(playerPosition.z <= (_terrainGrid[x,y].transform.position.z + _terrainGrid[x,y].terrainData.size.z)))
{
playerTerrain = _terrainGrid[x,y];
xOffset = 1 - x;
yOffset = 1 - y;
break;
}
}
if (playerTerrain != null)
break;
}
// 若果不等于上一次的索引[1,1]就切换索引，找出现在的middlle块
if (playerTerrain != _terrainGrid[1,1])
{
Terrain[,] newTerrainGrid = new Terrain[3,3];
for (int x = 0; x < 3; x++)
for (int y = 0; y < 3; y++)
{
int newX = x + xOffset;
if (newX < 0)
newX = 2;
else if (newX > 2)
newX = 0;
int newY = y + yOffset;
if (newY < 0)
newY = 2;
else if (newY > 2)
newY = 0;
newTerrainGrid[newX, newY] = _terrainGrid[x,y];
}
_terrainGrid = newTerrainGrid;
UpdateTerrainPositionsAndNeighbors();
}
}
}

复制代码