我正在为一个Unity平台游戏开发一个敌人AI移动系统，让敌人能够不断做出三个决定之一：空闲，向右移动或向左移动。我希望敌人能够选择任何这些决定，即使它刚刚选择的决定与下一个决定相同（即它可以选择＆＃34;向右移动＆＃34;连续两次，或者它想要的次数多很多次。下面的脚本没有错误，但是当我测试游戏时，它会导致我的敌人口吃。有时它会向右移动一瞬间，然后向左移动，等等。我觉得我的代码的固有逻辑在某种程度上是正确的，但实现它的方式需要一些工作。我感谢你能给我的任何帮助。
顺便说一下，如果我把'＃34; MakeMovementDecision＆＃34;功能在＆＃34;开始＆＃34;使敌人向左或向右移动.07，或者只是静止不动，从不执行另一个移动功能。
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class AIMovement : MonoBehaviour {
// References the enemy's Rigidbody2D component
private Rigidbody2D enemyRigidbody;
// Sets the enemy's movement speed
[SerializeField]
private int movementSpeed;
// Checks if the enemy is moving (to be used with animations)
private bool isMoving;
// The direction in which the enemy will move
private Vector2 directionToMove;
// The random decision (0, 1 or 2) that represents which movement function the enemy will perform
private int decisionValue;
// The time remaining before the enemy chooses which movement function to perform again
private float timeTilNextDecision;
// The random float that will be used to determine for how long the enemy remains idle
private float idleTime;
// The random float that will be used to determine for how long the enemy moves left or right
private float moveTime;
// Use this for initialization
void Start () {
// Accesses the enemy's Rigidbody2D component
enemyRigidbody = GetComponent<Rigidbody2D>();
}
void FixedUpdate () {
MakeMovementDecision();
}
/// <summary>
/// Generates the decision for which type of movement the enemy will perform
/// </summary>
private void MakeMovementDecision ()
{
// Chooses a value upon which the movement decision will be based
decisionValue = Random.Range(0, 3);
switch (decisionValue)
{
// Keeps the enemy standing still
case 0:
Idle();
break;
// Moves the enemy to the right
case 1:
MoveRight();
break;
// Moves the enemy to the left
case 2:
MoveLeft();
break;
}
}
/// <summary>
/// Causes the enemy to stand still with idle animations
/// </summary>
private void Idle ()
{
// Sets the idle stance duration
idleTime = Random.Range(5.0f, 10.0f);
// Calculates the time until the enemy may decide to change its movement
timeTilNextDecision = idleTime - Time.deltaTime;
// Sets the movement bool to false to play the idle animations
isMoving = false;
// Stops the enemy's movement
enemyRigidbody.velocity = Vector2.zero;
// Checks if the enemy should make a decision on its next movement
if (timeTilNextDecision < 0)
{
MakeMovementDecision();
}
}
private void MoveRight()
{
moveTime = Random.Range(2.0f, 5.01f);
timeTilNextDecision = moveTime - Time.deltaTime;
isMoving = true;
directionToMove = Vector2.right;
transform.Translate(directionToMove * (movementSpeed * Time.deltaTime));
if (timeTilNextDecision < 0)
{
MakeMovementDecision();
}
}
private void MoveLeft()
{
moveTime = Random.Range(2.0f, 5.01f);
timeTilNextDecision = moveTime - Time.deltaTime;
isMoving = true;
directionToMove = Vector2.left;
transform.Translate(directionToMove * (movementSpeed * Time.deltaTime));
if (timeTilNextDecision < 0)
{
MakeMovementDecision();
}
}
}
答案 0 :(得分：2)
我明白了。我是重写的受害者。这更简单，完全符合我的要求。关键是timeTilNextMovement变量是确定下一次移动何时发生的唯一变量。在我的其他脚本中，我一直使用太多变量来完成这个简单的任务。
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class EnemyMovement : MonoBehaviour {
private Rigidbody2D enemyRigidbody;
private int movementValue;
private float timeTilNextMovement;
private bool isMoving;
[SerializeField]
private float movementSpeed;
private Vector2 moveRight;
private Vector2 moveLeft;
// Use this for initialization
void Start () {
enemyRigidbody = GetComponent<Rigidbody2D>();
moveRight = Vector2.right;
moveLeft = Vector2.left;
MakeMovementDecision();
}
// Update is called once per frame
void FixedUpdate () {
timeTilNextMovement -= Time.fixedDeltaTime;
switch (movementValue)
{
case 0:
Debug.Log("IDLE");
isMoving = false;
enemyRigidbody.velocity = Vector2.zero;
break;
case 1:
Debug.Log("RIGHT");
isMoving = true;
transform.Translate(moveRight * (movementSpeed * Time.fixedDeltaTime));
break;
case 2:
Debug.Log("LEFT");
isMoving = true;
transform.Translate(moveLeft * (movementSpeed * Time.fixedDeltaTime));
break;
}
if (timeTilNextMovement < 0)
{
MakeMovementDecision();
}
}
private void MakeMovementDecision()
{
movementValue = Random.Range(0, 3);
timeTilNextMovement = Random.Range(2.0f, 5.0f);
}
}
答案 1 :(得分：0)
您需要计算FixedUpdate()内的时间。您的代码应该看起来像这样;
void FixedUpdate () {
// Calculates the time until the enemy may decide to change its movement
moveTime += Time.deltaTime;
timeTilNextDecision = idleTime - moveTime;
if (timeTilNextDecision < 0)
{
MakeMovementDecision();
}
}
/// <summary>
/// Generates the decision for which type of movement the enemy will perform
/// </summary>
private void MakeMovementDecision ()
{
// Chooses a value upon which the movement decision will be based
decisionValue = Random.Range(0, 3);
switch (decisionValue)
{
// Keeps the enemy standing still
case 0:
Idle();
break;
// Moves the enemy to the right
case 1:
MoveRight();
break;
// Moves the enemy to the left
case 2:
MoveLeft();
break;
}
}
/// <summary>
/// Causes the enemy to stand still with idle animations
/// </summary>
private void Idle ()
{
// Sets the idle stance duration
idleTime = Random.Range(5.0f, 10.0f);
// Sets the movement bool to false to play the idle animations
isMoving = false;
// Stops the enemy's movement
enemyRigidbody.velocity = Vector2.zero;
// Checks if the enemy should make a decision on its next movement
}
private void MoveRight()
{
moveTime = Random.Range(2.0f, 5.01f);
isMoving = true;
directionToMove = Vector2.right;
transform.Translate(directionToMove * (movementSpeed * Time.deltaTime));
}
private void MoveLeft()
{
moveTime = Random.Range(2.0f, 5.01f);
isMoving = true;
directionToMove = Vector2.left;
transform.Translate(directionToMove * (movementSpeed * Time.deltaTime));
}
编辑：我发现你正在以错误的方式计算时间。 Time.deltaTime是一个固定参数，它不会返回传递的时间。