Unity--簡單的攝像機跟隨和地面的坐標獲取

直接上代碼：

[csharp] 
using UnityEngine; 
using System.Collections; 
 
public class findFloor : MonoBehaviour { 
    private Vector3 floorPosition; 
    private RaycastHit hit; 
    private float rayLength = 300; 
    private float ySpeed=20; 
    private float gravity=2f; 
    private float jumpForce=1f; 
    public Transform character; 
    private uint jumpState=0; //0=grounded 1=jumping  
    // Use this for initialization  
    void Start () { 
     
    } 
     
    // Update is called once per frame  
    void Update () { 
        DetectKeys(); 
        FindFloorAndRotation(); 
        MoveCharacter(); 
        MoveCamera(); 
         
    } 
     
    void DetectKeys(){ 
        //jump:  
        if (Input.GetKeyDown("space") && jumpState==0) { 
            ySpeed-=jumpForce; 
            jumpState=1; 
        } 
    } 
     
    void FindFloorAndRotation(){ 
        if (Physics.Raycast(character.position,-Vector3.up,out hit, rayLength)){ 
            Debug.DrawRay(character.position, -Vector3.up * hit.distance); 
            floorPosition=hit.point; 
        } 
    } 
     
    void MoveCharacter(){ 
        //add gravity:  
        ySpeed += gravity * Time.deltaTime; 
         
        //apply gravity:  
        character.position=new Vector3(floorPosition.x,character.position.y-ySpeed,floorPosition.z); 
         
        //floor checking:  
        if(character.position.y<floorPosition.y){ 
            ySpeed=0; 
            jumpState=0; 
            character.position=new Vector3(floorPosition.x,floorPosition.y,floorPosition.z); 
        } 
    } 
     
    void MoveCamera(){ 
        //方法一  
        Camera.main.gameObject.transform.LookAt(character.position); 
        iTween.MoveUpdate(Camera.main.gameObject,new Vector3(character.position.x,character.position.y,character.position.z-100f),.9f);  
        //方法二  
        //iTween.LookUpdate(gameObject,target.position,2);  
    } 
} 

using UnityEngine;
using System.Collections;

public class findFloor : MonoBehaviour {
 private Vector3 floorPosition;
 private RaycastHit hit;
 private float rayLength = 300;
 private float ySpeed=20;
 private float gravity=2f;
 private float jumpForce=1f;
 public Transform character;
 private uint jumpState=0; //0=grounded 1=jumping
 // Use this for initialization
 void Start () {
 
 }
 
 // Update is called once per frame
 void Update () {
  DetectKeys();
  FindFloorAndRotation();
  MoveCharacter();
  MoveCamera();
  
 }
 
 void DetectKeys(){
  //jump:
  if (Input.GetKeyDown("space") && jumpState==0) {
   ySpeed-=jumpForce;
   jumpState=1;
  }
 }
 
 void FindFloorAndRotation(){
  if (Physics.Raycast(character.position,-Vector3.up,out hit, rayLength)){
   Debug.DrawRay(character.position, -Vector3.up * hit.distance);
   floorPosition=hit.point;
  }
 }
 
 void MoveCharacter(){
  //add gravity:
  ySpeed += gravity * Time.deltaTime;
  
  //apply gravity:
  character.position=new Vector3(floorPosition.x,character.position.y-ySpeed,floorPosition.z);
  
  //floor checking:
  if(character.position.y<floorPosition.y){
   ySpeed=0;
   jumpState=0;
   character.position=new Vector3(floorPosition.x,floorPosition.y,floorPosition.z);
  }
 }
 
 void MoveCamera(){
  //方法一
  Camera.main.gameObject.transform.LookAt(character.position);
  iTween.MoveUpdate(Camera.main.gameObject,new Vector3(character.position.x,character.position.y,character.position.z-100f),.9f); 
  //方法二
  //iTween.LookUpdate(gameObject,target.position,2);
 }
}