1、 Bean eater ： Control the movement of characters through the keyboard When the character meets the enemy , The enemy disappeared

 

 

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

public class cdr : MonoBehaviour {

	public GameObject sq;
	public GameObject cube;
	void Start () {
		Instantiate(sq);
        for (int i = 0; i < 15; i++)
        {
			float x = Random.Range(-4.5f, 4.5f);
			float z = Random.Range(-4.5f, 4.5f);
			Instantiate(cube, new Vector3(x, 0.15f, z), Quaternion.Euler(0, 0, 45));
			
		}
		
	}
	

}

 

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

public class q : MonoBehaviour {

    float speed=3;
	void Update()
    {
        Rigidbody r = GetComponent<Rigidbody>();
        float h = Input.GetAxis("Horizontal");
        float v = Input.GetAxis("Vertical");
        Vector3 pos = new Vector3(h, 0, v);
        r.velocity = pos * speed;
    }
    void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("EN"))
        {
            Destroy(other.gameObject);
        }
    }
}

1. Game begins 3 Seconds later , Different positions in the game scene （x:0--10 z:2--8） Random simultaneous cloning 3 A game object

 void Start()

    {

      StartCoroutine(AA());

}

  IEnumerator AA()//15.

    {

        while (true)

        {

            yield return new WaitForSeconds(3f);

            for (int i = 0; i < 3; i++)

            {

                int x = Random.Range(0, 10);

                int z = Random.Range(2, 8);

                Instantiate(cube, new Vector3(x, 0, z), Quaternion.identity);

            }

         }

    }

Interview questions

One ： What is a collaborative program ？

Start another logical processing while the main thread is running , To assist in the execution of current procedures , Coroutines are much like multithreading , But not multithreading ,Unity In fact, after the end of each frame to detect yield Whether the conditions of .

Two ：Unity3d The difference between Collider and trigger in ？

The collider is the carrier of the trigger , The trigger is just an attribute of the collider . When Is Trigger=false when , The collider triggers collisions based on the physics engine , Produce the effect of collision , You can call OnCollisionEnter/Stay/Exit function ; When Is Trigger=true when , Collider ignored by physics engine , No collision effect , You can call OnTriggerEnter/Stay/Exit function . If you want to detect the contact of an object and don't want collision detection to affect the movement of an object or whether an object passes through an area in space, you can use a trigger

3、 ... and ： The necessary conditions for an object to collide ？

Both objects must have colliders （Collider）, One of the objects must also have Rigidbody rigid body , And it must be a moving object with Rigidbody Script can detect collision .

Four ：CharacterController and Rigidbody The difference between

Rigidbody With completely real physical properties ,Unity The most basic component of a physical system in , Contains common physical properties , and CharacterController It can be said to be limited Rigidbody, It has a certain physical effect, but it is not completely real , yes Unity A component encapsulated to enable developers to easily develop games from the first person perspective

5、 ... and ： sketch prefab Usefulness ( Presupposition )

Instantiate when the game is running ,prefab It's like a template , For the material you already have 、 Script 、 Parameter to make a default configuration , For future modification , meanwhile prefab The packaged content simplifies the export operation , Facilitate team communication .

6、 ... and ： In the whole process of object collision , There are several stages , List the corresponding functions respectively

Three stages ,1.OnCollisionEnter 2.OnCollisionStay 3.OnCollisionExit

7、 ... and ：Unity3d In our physics engine , There are several ways to apply force , Describe them separately

rigidbody.AddForce/AddForceAtPosition, All in rigidbody In a series of functions . You can check it yourself rigidbody Of API

8、 ... and ：Unity3d Scripts have a relatively complete life cycle from wake-up to destruction , Please list some important methods of the system .

Awake——>OnEnable–>Start——>Update——>FixedUpdate——>LateUpdate——>OnGUI——>OnDisable——>OnDestroy