Unity video Summary (a) elementary programming

Beginner programming – Unity Learn

Input Input. GetKeyDown (KeyCode. R)
GetComponent().material. Color = color.green;
The update() function is the update frame

using UnityEngine;
using System.Collections;

public class ExampleBehaviourScript : MonoBehaviour
{
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.R))
        {
            GetComponent<Renderer> ().material.color = Color.red;
        }
        if (Input.GetKeyDown(KeyCode.G))
        {
            GetComponent<Renderer>().material.color = Color.green;
        }
        if(Input.GetKeyDown(KeyCode.B)) { GetComponent<Renderer>().material.color = Color.blue; }}}Copy the code

The start function is the start function
The awake function is also the start function

using UnityEngine;
using System.Collections;

public class VariablesAndFunctions : MonoBehaviour
{   
    int myInt = 5;
    
    
    void Start ()
    {
        myInt = MultiplyByTwo(myInt);
        Debug.Log (myInt);
    }
    
    
    int MultiplyByTwo (int number)
    {
        int ret;
        ret = number * 2;
        returnret; }}Copy the code

The transform value itself at this point

using UnityEngine;
using System.Collections;

public class BasicSyntax : MonoBehaviour
{
    void Start ()
    {
        Debug.Log(transform.position.x);
        
        if(transform.position.y <= 5f)
        {
            Debug.Log ("I'm about to hit the ground!"); }}}Copy the code

Time.deltaTime Interval Time

using UnityEngine;
using System.Collections;

public class IfStatements : MonoBehaviour
{
    float coffeeTemperature = 85.0 f;
    float hotLimitTemperature = 70.0 f;
    float coldLimitTemperature = 40.0 f;
    

    void Update ()
    {
        if(Input.GetKeyDown(KeyCode.Space))
            TemperatureTest();
        
        coffeeTemperature -= Time.deltaTime * 5f;
    }
    
    
    void TemperatureTest ()
    {
        // If the coffee temperature is higher than the hottest serving temperature...
        if(coffeeTemperature > hotLimitTemperature)
        {
            / /... Perform this operation.
            print("Coffee is too hot.");
        }
        // If not, but the coffee temperature is below the coldest drinking temperature...
        else if(coffeeTemperature < coldLimitTemperature)
        {
            / /... Perform this operation.
            print("Coffee is too cold.");
        }
        // If neither, then...
        else
        {
            / /... Perform this operation.
            print("Coffee is just right."); }}}Copy the code

Awake runs even if the script is not enabled, primarily to initialize references
Start is the first time to update the pre-call, you must enable the script

using UnityEngine;
using System.Collections;

public class AwakeAndStart : MonoBehaviour
{
    void Awake ()
    {
        Debug.Log("Awake called.");
    }
    
    
    void Start ()
    {
        Debug.Log("Start called."); }}Copy the code

FixedUpdate fixed interval calls
Update is called after a frame has run

using UnityEngine;
using System.Collections;

public class UpdateAndFixedUpdate : MonoBehaviour
{
    void FixedUpdate ()
    {
        Debug.Log("FixedUpdate time :" + Time.deltaTime);
    }
    
    
    void Update ()
    {
        Debug.Log("Update time :"+ Time.deltaTime); }}Copy the code

Enable/disable components

using UnityEngine;
using System.Collections;

public class EnableComponents : MonoBehaviour
{
    private Light myLight;
    
    
    void Start ()
    {
        myLight = GetComponent<Light>();
    }
    
    
    void Update ()
    {
        if(Input.GetKeyUp(KeyCode.Space)) { myLight.enabled = ! myLight.enabled; }}}Copy the code

Is gameObject also a Transform itself

using UnityEngine;
using System.Collections;

public class ActiveObjects : MonoBehaviour
{
    void Start ()
    {
        gameObject.SetActive(false); }}Copy the code

using UnityEngine;
using System.Collections;

public class CheckState : MonoBehaviour
{
    public GameObject myObject;
    
    
    void Start ()
    {
        Debug.Log("Active Self: " + myObject.activeSelf);
        Debug.Log("Active in Hierarchy"+ myObject.activeInHierarchy); }}Copy the code

Input.GetKey(keycode. UpArrow) This one doesn’t get GetKeyDown
Vector3.forward is a local coordinate, so we can do this

using UnityEngine;
using System.Collections;

public class TransformFunctions : MonoBehaviour
{
    public float moveSpeed = 10f;
    public float turnSpeed = 50f;
    
    
    void Update ()
    {
        if(Input.GetKey(KeyCode.UpArrow))
            transform.Translate(Vector3.forward * moveSpeed * Time.deltaTime);
        
        if(Input.GetKey(KeyCode.DownArrow))
            transform.Translate(-Vector3.forward * moveSpeed * Time.deltaTime);
        
        if(Input.GetKey(KeyCode.LeftArrow))
            transform.Rotate(Vector3.up, -turnSpeed * Time.deltaTime);
        
        if(Input.GetKey(KeyCode.RightArrow)) transform.Rotate(Vector3.up, turnSpeed * Time.deltaTime); }}Copy the code

This script is mainly used on cameras

using UnityEngine;
using System.Collections;

public class CameraLookAt : MonoBehaviour
{
    public Transform target;
    
    void Update (){ transform.LookAt(target); }}Copy the code

using UnityEngine;
using System.Collections;

public class DestroyBasic : MonoBehaviour
{
    void Update ()
    {
        if(Input.GetKey(KeyCode.Space)) { Destroy(gameObject); }}}Copy the code

using UnityEngine;
using System.Collections;

public class DestroyOther : MonoBehaviour
{
    public GameObject other;
    
    
    void Update ()
    {
        if(Input.GetKey(KeyCode.Space)) { Destroy(other); }}}Copy the code

using UnityEngine;
using System.Collections;

public class DestroyComponent : MonoBehaviour
{
    void Update ()
    {
        if(Input.GetKey(KeyCode.Space)) { Destroy(GetComponent<MeshRenderer>()); }}}Copy the code

The process of GetKeyDown does not include the process of continuous press
The process of GetKey pressing + the process of continuing pressing
GetKeyUp release process

using UnityEngine;
using System.Collections;

public class KeyInput : MonoBehaviour
{
    public GUITexture graphic;
    public Texture2D standard;
    public Texture2D downgfx;
    public Texture2D upgfx;
    public Texture2D heldgfx;
    
    void Start()
    {
        graphic.texture = standard;
    }
    
    void Update ()
    {
        bool down = Input.GetKeyDown(KeyCode.Space);
        bool held = Input.GetKey(KeyCode.Space);
        bool up = Input.GetKeyUp(KeyCode.Space);
        
        if(down)
        {
            graphic.texture = downgfx;
        }
        else if(held)
        {
            graphic.texture = heldgfx;
        }
        else if(up)
        {
            graphic.texture = upgfx;
        }
        else
        {
            graphic.texture = standard; 
        }
        
        guiText.text = "" + down + "\n " + held + "\n "+ up; }}Copy the code

The source of the jump

using UnityEngine;
using System.Collections;

public class ButtonInput : MonoBehaviour
{
    public GUITexture graphic;
    public Texture2D standard;
    public Texture2D downgfx;
    public Texture2D upgfx;
    public Texture2D heldgfx;
    
    void Start()
    {
        graphic.texture = standard;
    }
    
    void Update ()
    {
        bool down = Input.GetButtonDown("Jump");
        bool held = Input.GetButton("Jump");
        bool up = Input.GetButtonUp("Jump");
        
        if(down)
        {
            graphic.texture = downgfx;
        }
        else if(held)
        {
            graphic.texture = heldgfx;
        }
        else if(up)
        {
            graphic.texture = upgfx;
        }
        else
        {
            graphic.texture = standard;
        }
    
        guiText.text = "" + down + "\n " + held + "\n "+ up; }}Copy the code

using UnityEngine;
using System.Collections;

public class AxisExample : MonoBehaviour
{
    public float range;
    public GUIText textOutput;
    
    
    void Update () 
    {
        float h = Input.GetAxis("Horizontal");
        float xPos = h * range;
        
        transform.position = new Vector3(xPos, 2f.0);
        textOutput.text = "Value Returned: "+h.ToString("F2"); }}Copy the code

using UnityEngine;
using System.Collections;

public class AxisRawExample : MonoBehaviour
{
    public float range;
    public GUIText textOutput;
    
    
    void Update () 
    {
        float h = Input.GetAxisRaw("Horizontal");
        float xPos = h * range;
        
        transform.position = new Vector3(xPos, 2f.0);
        textOutput.text = "Value Returned: "+h.ToString("F2"); }}Copy the code

Mouse events

using UnityEngine;
using System.Collections;

public class MouseClick : MonoBehaviour
{
    void OnMouseDown ()
    {
        rigidbody.AddForce(-transform.forward * 500f);
        rigidbody.useGravity = true; }}Copy the code

Gets variables for other scripts
Use GetComponent sparingly

using UnityEngine;
using System.Collections;

public class UsingOtherComponents : MonoBehaviour
{
    public GameObject otherGameObject;
    
    
    private AnotherScript anotherScript;
    private YetAnotherScript yetAnotherScript;
    private BoxCollider boxCol;
    
    
    void Awake ()
    {
        anotherScript = GetComponent<AnotherScript>();
        yetAnotherScript = otherGameObject.GetComponent<YetAnotherScript>();
        boxCol = otherGameObject.GetComponent<BoxCollider>();
    }
    
    
    void Start ()
    {
        boxCol.size = new Vector3(3.3.3);
        Debug.Log("The player's score is " + anotherScript.playerScore);
        Debug.Log("The player has died " + yetAnotherScript.numberOfPlayerDeaths + " times"); }}Copy the code

using UnityEngine;
using System.Collections;

public class AnotherScript : MonoBehaviour
{
    public int playerScore = 9001;
}
Copy the code

using UnityEngine;
using System.Collections;

public class YetAnotherScript : MonoBehaviour
{
    public int numberOfPlayerDeaths = 3;
}
Copy the code

Instantiate is used to Instantiate a Perfab, but the input parameter can be Rigidbody
BarrelEnd is used to display the location
AddForce is a force applied in one direction

using UnityEngine;
using System.Collections;

public class UsingInstantiate : MonoBehaviour
{
    public Rigidbody rocketPrefab;
    public Transform barrelEnd;
    
    
    void Update ()
    {
        if(Input.GetButtonDown("Fire1"))
        {
            Rigidbody rocketInstance;
            rocketInstance = Instantiate(rocketPrefab, barrelEnd.position, barrelEnd.rotation) as Rigidbody;
            rocketInstance.AddForce(barrelEnd.forward * 5000); }}}Copy the code

Delete the object 1.5 seconds later

using UnityEngine;
using System.Collections;

public class RocketDestruction : MonoBehaviour
{
    void Start()
    {
        Destroy (gameObject, 1.5 f); }}Copy the code

GameObject seems to be all objects
The Tag is added here

using UnityEngine;
using System.Collections;

public class Arrays : MonoBehaviour
{
    public GameObject[] players;

    void Start ()
    {
        players = GameObject.FindGameObjectsWithTag("Player");
        
        for(int i = 0; i < players.Length; i++)
        {
            Debug.Log("Player Number "+i+" is named "+players[i].name); }}}Copy the code

using UnityEngine;
using System.Collections;

public class InvokeScript : MonoBehaviour 
{
    public GameObject target;
    
    
    void Start()
    {
        Invoke ("SpawnObject".2);
    }
    
    void SpawnObject()
    {
        Instantiate(target, new Vector3(0.2.0), Quaternion.identity); }}Copy the code

using UnityEngine;
using System.Collections;

public class InvokeRepeating : MonoBehaviour 
{
    public GameObject target;
    
    
    void Start()
    {
        InvokeRepeating("SpawnObject".2.1);
    }
    
    void SpawnObject()
    {
        float x = Random.Range(2.0 f.2.0 f);
        float z = Random.Range(2.0 f.2.0 f);
        Instantiate(target, new Vector3(x, 2, z), Quaternion.identity); }}Copy the code

Invoke and InvokeRepeating asynchronous trigger functions
The first argument is both a function and the second argument is time

using UnityEngine;
using System.Collections;

public class InvokeScript : MonoBehaviour 
{
    public GameObject target;
    
    
    void Start()
    {
        Invoke ("SpawnObject".2);
    }
    
    void SpawnObject()
    {
        Instantiate(target, new Vector3(0.2.0), Quaternion.identity); }}Copy the code

using UnityEngine;
using System.Collections;

public class InvokeRepeating : MonoBehaviour 
{
    public GameObject target;
    
    
    void Start()
    {
        InvokeRepeating("SpawnObject".2.1);
    }
    
    void SpawnObject()
    {
        float x = Random.Range(2.0 f.2.0 f);
        float z = Random.Range(2.0 f.2.0 f);
        Instantiate(target, new Vector3(x, 2, z), Quaternion.identity); }}Copy the code

The enumeration

using UnityEngine;
using System.Collections;

public class EnumScript : MonoBehaviour 
{
    enum Direction {North, East, South, West};

        void Start () 
    {
        Direction myDirection;
        
        myDirection = Direction.North;
    }
    
    Direction ReverseDirection (Direction dir)
    {
        if(dir == Direction.North)
            dir = Direction.South;
        else if(dir == Direction.South)
            dir = Direction.North;
        else if(dir == Direction.East)
            dir = Direction.West;
        else if(dir == Direction.West)
            dir = Direction.East;
        
        returndir; }}Copy the code

Unity video Summary (a) elementary programming

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