Unity C# - 如何检查随机移动的游戏对象是否在边界内

Question

我有一个随机移动的游戏对象在带有附加代码的场景中移动。 问题在于，尽管存在带有刚体的边界对撞机，但有时它会直接穿过它们并落下。

我如何限制它一旦撞到那些对撞机它会旋转 189 圈并继续随机移动？

地形宽度为 50f，地形高度也为 50f。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerTrainingMovement : MonoBehaviour {

    public float speed;

    private float randomizedSpeed = 0.0f;
    private float nextActionTime = -1.0f;
    private Vector3 targetPosition;
    private Vector3 moveVector;
    private void FixedUpdate() {

        if(speed > 0.0f) {
            Move2(); 
            //Move();
        }
    }

    private void Move2() {

        if(Time.fixedTime >= nextActionTime) {

            // Get a threshold time
            nextActionTime = UnityEngine.Random.Range(50.0f, 200.0f);

            // Pick a random target position
            targetPosition = TrainingArea.ChooseRandomPosition(transform.parent.position, 0f, 270f, 2f, 10f);

             
            // Rotate towards the target position
            transform.rotation = Quaternion.LookRotation(targetPosition - transform.position, Vector3.up);

            float timeToGetThere = Vector3.Distance(transform.position, targetPosition) / randomizedSpeed;
            nextActionTime = Time.fixedTime + timeToGetThere;


            // Get a movement vector
            moveVector = speed * transform.forward;
            //moveVector = speed * new Vector3(1.0f, 0.0f, 0.0f);
        }
        else {

            // Check -X boundary
            if(transform.position.x - 1.0f <= transform.parent.gameObject.transform.position.x) {

                transform.position = transform.position + new Vector3(1.0f, 0.0f, 0.0f);
                moveVector.x *= -1.0f;
            }

            // Check +X boundary
            if(transform.position.x + 1.0f >= transform.parent.gameObject.transform.position.x + TrainingArea.terrainWidth) {

                transform.position = transform.position + new Vector3(-1.0f, 0.0f, 0.0f);
                moveVector.x *= -1.0f;
            }

            // Check -Z boundary
            if(transform.position.z - 1.0f <= transform.parent.gameObject.transform.position.z) {

                transform.position = transform.position + new Vector3(0.0f, 0.0f, 1.0f);
                moveVector.z *= -1.0f;
            }

            // Check +Z boundary
            if(transform.position.z + 1.0f >= transform.parent.gameObject.transform.position.z + TrainingArea.terrainHeight) {

                transform.position = transform.position + new Vector3(0.0f, 0.0f, -1.0f);
                moveVector.z *= -1.0f;
            }

            // Move 
            transform.position = transform.position + moveVector * Time.fixedDeltaTime;

            // Update nextActionTime
            nextActionTime--;
        }
    }
}
public static Vector3 RandomPositionOnTerrain(Vector3 origin) {
    //Range(30.0f, terrainWidth - 30.0f);
    float randomX = origin.x + UnityEngine.Random.Range(20.0f, terrainWidth);
    float randomZ = origin.z + UnityEngine.Random.Range(20.0f, terrainHeight);

    return new Vector3(randomX, 30.0f, randomZ);
}

Answer 1

您可以使用OnCollisionEnter在单位撞到其他对撞机时触发旋转。

这样的事情必须这样做：

void OnCollisionEnter(Collision col)
   {
       if(col.gameObject.tag(or name) = "a tag or name"){
          //Do Stuff here
       }
   }

这是详细的文档： https://docs.unity3d.com/ScriptReference/Collider.OnCollisionEnter.html

另一种解决方法是使用NavMesh 。 它将使动作基于UnityEngine.AI并且非常流畅，但您需要一个全新的脚本。