3dunity game project actual combat - aircraft war

Code and game information

One 、 Game planning

1、 Introduction to the game

   The background of the game is over Mars , The protagonist and the enemy are different spacecraft , The enemy flies head-on to the protagonist , The protagonist gets points by shooting to destroy the enemy . If the protagonist loses , Then the game is over .

2、 game UI

   The screen shows the protagonist's HP and score . If the game is over , The screen shows “ Game over “, Show at the same time “ Once again ” Button . Press ESC key , The game will be suspended , Show “ Keep playing ”,“ Quit the game ”.

3、 Lead

   The protagonist has three lives , Hit by the enemy, one-time life is directly cleared , Hit by enemy bullets , Lose one life , When life value is 0 when , Game over .

4、 operation

   In the game pc Upper development , The up, down, left and right keys on the keyboard control the character to move in the corresponding position . The space bar and the left mouse button control the firing of bullets .

5、 The enemy

   The enemy is divided into two categories ： Primary enemy , Armor is weak , Mainly to hit the protagonist ; Advanced enemy , Strong armor , Can fire bullets , You can also hit the protagonist .

Two 、 The code analysis

1、 Create map

• stay Scene Create a 3D Of Plane object , Use the image of the starry sky as the background
• Create another 3D object , Map with the image of Mars
• For starry Plane Add animation effects to objects , Make the background in space more realistic .
• Set an empty object around the map , When the enemy walks out of the map , Destroy the object in time , Save memory .

2、 Create protagonists and bullets

• Create the protagonist's Object object , And map
• To create a bullet Object object , And map . Here, because bullets are reusable objects , So turn it into profeb Preset object , As long as Scene Drag the created object into Project In the corresponding folder .
• Add correlation to the objects in the scene tag, And specify tag name
  
• Add collision containers for protagonists , And realize the collision effect in the script
  
• Add Audio source Containers , Only in this way can there be sound , And add shooting sound and explosion effects to the script .
• Create corresponding scripts for the protagonist and bullets , Specify Transform object

// Palyer.cs

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

[AddComponentMenu("MyGame/Player")]
public class Player : MonoBehaviour
{
    
    public float m_life = 3;// The protagonists are 3 Life 
    public float m_speed = 3; // Control the moving speed of the protagonist 
    float m_rocketRate = 0.3f; // Control the firing frequency of bullets 

    private float m_rocketspeed = 0;
    public Transform m_rocket;   
    protected Transform m_transform;


    public AudioClip m_shootClip; // voice 
    protected AudioSource m_audio; // Sound source 
    public Transform m_explosionFX; // Explosive effects 
    public Transform m_explosionFX2; // Explosive effects 

    // Start is called before the first frame update
    void Start()
    {
    
        m_transform = this.transform;
        m_audio = this.GetComponent<AudioSource>();
    }

    private void OnTriggerEnter(Collider other)
    {
    
        if (other.tag.CompareTo("EnemyRocket") == 0)  // Hit the enemy's bullet , Life reduced by one 
        {
    
            m_life -= 1;

            // The protagonist loses blood feedback 
            Instantiate(m_explosionFX2, m_transform.position, Quaternion.identity);
            if (m_life <= 0)
            {
    

                // The death explosion effect of the protagonist 
                Instantiate(m_explosionFX, m_transform.position, Quaternion.identity);
                Destroy(this.gameObject);
            }
        }
        if (other.tag.CompareTo("Enemy") == 0)  // Meet the enemy , HP is cleared and destroyed 
        {
    
            m_life = 0;

            // The death explosion effect of the protagonist 
            Instantiate(m_explosionFX, m_transform.position, Quaternion.identity);
            Destroy(this.gameObject);
        }
    }
    // Update is called once per frame
    void Update()
    {
    
        float moveV = 0; // Longitudinal distance 
        float moveH = 0; // Lateral distance 


        if (Input.GetKey(KeyCode.DownArrow))
        {
    
            moveV += m_speed * Time.deltaTime;
        }
        if (Input.GetKey(KeyCode.UpArrow))
        {
    
            moveV -= m_speed * Time.deltaTime;
        }
        if (Input.GetKey(KeyCode.RightArrow))
        {
    
            moveH -= m_speed * Time.deltaTime;
        }
        if (Input.GetKey(KeyCode.LeftArrow))
        {
    
            moveH += m_speed * Time.deltaTime;
        }

        m_rocketspeed -= Time.deltaTime;
        if (m_rocketspeed <= 0)
        {
    
            m_rocketspeed = m_rocketRate;
            if (Input.GetKey(KeyCode.Space) || Input.GetMouseButton(0))
            {
    
                Instantiate(m_rocket, new Vector3(m_transform.position.x,m_transform.position.y,m_transform.position.z + 0.5f), m_transform.rotation);

                m_audio.PlayOneShot(m_shootClip);
            }
            // Move 
        }
        m_transform.Translate(new Vector3(moveH, 0, moveV));
  
    }
}

//Rocket.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[AddComponentMenu("MyGame/Rocket")]
public class Rocket : MonoBehaviour
{
    
    public float m_speed = 10; // Set the bullet speed 
    public float m_liveTime = 1; // Set the bullet lifetime 
    public float m_power = 1; // Set the bullet power 
    protected Transform m_transform;
    // Start is called before the first frame update
    void Start()
    {
    
        m_transform = this.transform;
    }

    private void OnTriggerEnter(Collider other)
    {
    
        if(other.tag.CompareTo("Enemy") == 0)
        {
    
            Destroy(this.gameObject);
        }
    }
    // Update is called once per frame
    void Update()
    {
    
        m_liveTime -= Time.deltaTime;
        if (m_liveTime <= 0)
            Destroy(this.gameObject);

        m_transform.Translate(new Vector3(0, 0, -m_speed * Time.deltaTime));
    }
}

//Explosion.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;


[AddComponentMenu("MyGame/Explosion")]
public class Explosion : MonoBehaviour
{
    
    public float m_life = 2;
    // Start is called before the first frame update
    void Start()
    {
    
        
    }

    // Update is called once per frame
    void Update()
    {
    
        m_life -= Time.deltaTime;
        if(m_life <= 0)
        {
    
            m_life = 2;
            Destroy(this.gameObject);
        }
    }
}

3、 Create enemies

• Create ordinary enemies and advanced enemies respectively object object , Advanced enemies can inherit ordinary enemies
• Add tag And the following containers , And set the corresponding value , Advanced enemies also set the preset object of bullets in the script container .
  
  
• Create key enemy script

// Enemy.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[AddComponentMenu("MyGame/Enemy")]
public class Enemy : MonoBehaviour
{
    
    public float e_life = 20;// Enemy's life value 
    public float m_speed = 1; // The movement speed of the enemy 
    public float m_rotSpeed = 30; // Rotation speed 
    protected float m_timer = 1.5f; // Change direction interval 
    public int m_point = 10; // Points gained by destroying an enemy 


    public Transform m_explosionFX; // Explosive effects 

    protected Transform m_transform;
    // Start is called before the first frame update
    void Start()
    {
    
        m_transform = this.transform;
    }

    // Update is called once per frame
    void Update()
    {
     
        updataMove();
    }

    private void OnTriggerEnter(Collider other)
    {
    
        if (other.tag.CompareTo("PlayerRocket") == 0)  // If you encounter a player's bullet 
        {
    
            Rocket rocket = other.GetComponent<Rocket>(); // obtain Rocket  Script for Component
            if (rocket != null)
            {
    
                
                e_life -= rocket.m_power;
                if (e_life <= 0)
                {
    
                    // Explosion effect when the enemy dies 
                    //Quaternion.identity, The quaternion corresponds to “no rotation”-  The object is perfectly aligned with the world axis or the parent axis 
                    Instantiate(m_explosionFX, m_transform.position, Quaternion.identity); 

                    Destroy(this.gameObject);

                    GameManager.instance.AddScore(m_point); // Add points to the protagonist 
                }
            }
        
        }

        if(other.tag.CompareTo("bound") == 0)  // The enemy will be destroyed automatically after flying out of the screen 
        {
    
            e_life = 0;

            Destroy(this.gameObject);
        }
    }

    virtual protected void updataMove()
    {
    
        m_timer -= Time.deltaTime;
        if(m_timer <= 0)
        {
    
            m_timer = 3;   // Every interval 3 Change the direction of a rotation 
            m_rotSpeed = -m_rotSpeed;
        }

        //Rotate() The function will rotate all the time , Parameter 1 indicates axis , Parameter 2 represents the rotation angle , Parameter three represents the rotating reference system 
        m_transform.Rotate(Vector3.up, m_rotSpeed * Time.deltaTime, Space.World);// Direction of rotation 
        m_transform.Translate(new Vector3(0, 0, -m_speed * Time.deltaTime)); // Forward 
    }
}

//SuperEnemy.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[AddComponentMenu("MyGame/SuperEnemy")]
public class SuperEnemy : Enemy
{
    
    public Transform m_rocket;
    protected float m_fireTime = 2;
    protected Transform m_player;

    void Awake() // Execute once when the game is all instantiated , And before stat  Method 
    {
    
        GameObject obj = GameObject.FindGameObjectWithTag("player");
        if (obj != null)
        {
    
            m_player = obj.transform;
        }

    }
    // Start is called before the first frame update
    protected override void updataMove()
    {
    
        m_fireTime -= Time.deltaTime;
        if(m_fireTime <= 0)
        {
    
            m_fireTime = 2;
            if(m_player != null)
            {
    
                Vector3 relativePos = m_transform.position - m_player.position;
                Instantiate(m_rocket, m_transform.position, Quaternion.LookRotation(relativePos));
            }
        }
        // Forward 
        m_transform.Translate(new Vector3(0, 0, -m_speed * Time.deltaTime));
    }

    private void OnTriggerEnter(Collider other)
    {
    
        if (other.tag.CompareTo("PlayerRocket") == 0)  // If you encounter a player's bullet 
        {
    
            Rocket rocket = other.GetComponent<Rocket>(); // obtain Rocket  Script for Component
            if (rocket != null)
            {
    

                e_life -= rocket.m_power;
                if (e_life <= 0)
                {
    
                    // Explosion effect when the enemy dies 
                    Instantiate(m_explosionFX, m_transform.position, Quaternion.identity);
                    Destroy(this.gameObject);

                    GameManager.instance.AddScore(m_point); // Add points to the protagonist 
                }
            }

        }

        if (other.tag.CompareTo("bound") == 0)  // The enemy will be destroyed automatically after flying out of the screen 
        {
    
            e_life = 0;
            Destroy(this.gameObject);
        }
    }
}

4、 Create enemy generator

• The designated place at the top of the map , Place several empty objects , Used to generate enemies
• There are two types of enemy generators , Generate different types of enemies , You need to specify the enemy in the script container
• Create a script for the enemy generator

// EnemySpawn.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[AddComponentMenu("MyGame/EnemySpawn")]
public class EnemySpawn : MonoBehaviour
{
    

    public Transform m_enemy; // Of the enemy prefab
    public float m_timer = 5; // The interval between enemy generation 
    protected Transform m_transform;
    // Start is called before the first frame update
    void Start()
    {
    
        m_transform = this.transform;
    }

    // Update is called once per frame
    void Update()
    {
    
        m_timer -= Time.deltaTime;
        if (m_timer <= 0)
        {
    
            m_timer = 5 + Random.value * 15.0f;  // produce 5 - 15 Random number between 

            // Quaternion.identity Is refers to Quaternion(0,0,0,0)
            Instantiate(m_enemy, m_transform.position, Quaternion.identity);
        }
    }

    // Fill an empty object with a picture , It is convenient to know the location of the generator on the console , I can't see it in the game 
    void OnDrawGizmos()
    {
    
        Gizmos.DrawIcon(transform.position, "item.png", true);
    }
}

5、 Create game manager

The game manager is an empty object , There is one and only one , Used to control the game interface , And control the start and exit of the game .

• Create an empty object , Name it GameManager, Add a script to it
• To add Audio Source Containers , And specify the background music file in the script container

// GameManager.cs

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

[AddComponentMenu("MyGame/GameManager")]
public class GameManager : MonoBehaviour
{
    
    public static GameManager instance;

    public float m_score = 0;
    public static int m_hiscore = 0;
    public AudioClip m_musicClip; // Specify music clips 
    protected Player m_player;
    protected AudioSource m_audio;
    

    private void Awake()
    {
    
        instance = this;
    }
    // Start is called before the first frame update
    void Start()
    {
    
        m_audio = this.GetComponent<AudioSource>();
        // Get the protagonist 
        GameObject obj = GameObject.FindGameObjectWithTag("player");
        if(obj != null)
        {
    
            m_player = obj.GetComponent<Player>();
        }
    }

    // Update is called once per frame
    void Update()
    {
    
        // Loop back the background music 
        if (!m_audio.isPlaying)
        {
    
            m_audio.clip = m_musicClip;
            m_audio.Play();
        }

        // Pause the game 
        if(Time.timeScale > 0 && Input.GetKeyDown(KeyCode.Escape))
        {
    
            Time.timeScale = 0;
        }
    }

    [System.Obsolete]
    private void OnGUI()
    {
    
        // Pause the game 
        if(Time.timeScale == 0)
        {
    
            // Continue game button 
            if(GUI.Button(new Rect(Screen.width * 0.5f -50,Screen.height * 0.4f, 100, 30), " Keep playing "))
            {
    
                Time.timeScale = 1;
            }

            // Exit game button 
            if (GUI.Button(new Rect(Screen.width * 0.5f - 50, Screen.height * 0.6f, 100, 30), " Quit the game "))
            {
    
                Application.Quit(); // Only when the project is packaged and compiled, the program uses Application.Quit() It works 
            }
        }

        int life = 0;
        if(m_player != null)
        {
    
            life = (int)m_player.m_life; // Get the life value of the protagonist 
        }
        else  // The protagonist is destroyed , That is, the game fails 
        {
    
            // Enlarge the font 
            GUI.skin.label.fontSize = 50;

            // Show game failure 
            GUI.skin.label.alignment = TextAnchor.LowerCenter;
            GUI.Label(new Rect(0, Screen.height * 0.2f, Screen.width, 60), " The game failed ");

            GUI.skin.label.fontSize = 20;

            // Show the button again 
            if(GUI.Button(new Rect(Screen.width * 0.5f - 50, Screen.height * 0.5f, 100, 30), " Once again "))
            {
    
                // Read the current level 
                Application.LoadLevel(Application.loadedLevelName);
            }
        }

        GUI.skin.label.fontSize = 15;
        // Show the protagonist's life 
        GUI.Label(new Rect(5, 5, 100, 30), " armor :" + life);
        // Show the highest score 
        GUI.skin.label.alignment = TextAnchor.LowerCenter;
        GUI.Label(new Rect(0, 5, Screen.width, 30), " The highest :" + m_hiscore);

        // Show current score 
        GUI.Label(new Rect(0, 25, Screen.width, 30), " score :" + m_score);

    }

    public void AddScore(int point)
    {
    
        m_score += point;

        //  Higher scores 
        if(m_hiscore < m_score)
        {
    
            m_hiscore = (int)m_score;
        }
    }
}

6、 Create game start Title

The game here is basically finished , Now you need to create a starting Title Scene, And then click “ Start the game ” Jump to current level1.

• Create a new Scene, Save as start
• In this start Create a camera and a UI->RowImage object , Fill in with pictures , Set up the picture at the beginning of the game
• Add a script file for the camera

//TitleSceen.cs

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

[AddComponentMenu("MyGame/TitleScreen")]
public class TitleSceen : MonoBehaviour
{
    
    // Start is called before the first frame update
    void Start()
    {
    
        
    }

    // Update is called once per frame
    void Update()
    {
    
        
    }

    [System.Obsolete]
    private void OnGUI()
    {
    
        GUI.skin.label.fontSize = 48;
        GUI.skin.label.alignment = TextAnchor.LowerCenter; //UI Center alignment 
        GUI.Label(new Rect(0, 30, Screen.width, 100), " Space war ");

        // Start game button 
        if (GUI.Button(new Rect(Screen.width * 0.5f - 100, Screen.height * 0.7f, 200, 30), " Start the game "))
        {
    
            Application.LoadLevel("level1");
        }
    }
}

3、 ... and 、 Game compilation and release

Set the game icon , And some corresponding parameters . If you don't understand, use default .

When compiling, you must put two Scene Full hook up , And adjust the order .

Code and game information