API自学记录（四）

如何通过WWW下载图片

支持http:// https:// file:// ftp://(匿名下载)四种下载方式

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

public class WWWTest : MonoBehaviour {

    public string url = "一个图片的网址";
    IEnumerator Start()
    {
        WWW www = new WWW(url);
        yield return www;
        Renderer renderer = GetComponent<Renderer>();
        renderer.material.mainTexture = www.texture;
    }

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

Touches触摸事件

GetTouch获得每个触摸事件

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

public class Touches : MonoBehaviour {
	// Use this for initialization
	void Start () {
	}
	// Update is called once per frame
	void Update () {
        Debug.Log(Input.touches.Length);
        if (Input.touches.Length > 0)
        {
            Touch touch1 = Input.touches[0];
            //touch1.position;//获取位置
            TouchPhase phase = touch1.phase;//获取触摸状态如began/moved等
        }
    }
}

关于Camera组件的作用和一些属性介绍

Current获取到当前相机
Main获取当前场景main camera 通过标签获取，如多个只取第一个
ScreenPointToRay检测碰撞
使用Camera把屏幕坐标转换成射线：

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

public class CameraTest : MonoBehaviour {
    private Camera camera;
    // Use this for initialization
    void Start () {
        camera = Camera.main;
    }
    // Update is called once per frame
    void Update () {
        Ray ray = camera.ScreenPointToRay(Input.mousePosition);
        //Debug.DrawRay(ray.origin, ray.direction);
        //Debug.DrawLine(ray.origin, ray.origin + ray.direction * 100);
        RaycastHit hit;
        bool isCollider = Physics.Raycast(ray, out hit);
        Debug.Log(hit.collider);
    }
}

角色控制器CharacterController的使用

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

public class Player_CC : MonoBehaviour {
    private CharacterController cc;
    public float speed = 3;
    // Use this for initialization
    void Start () {
        cc = GetComponent<CharacterController>();
    }
    // Update is called once per frame
    void Update () {
        float h = Input.GetAxis("Horizontal");
        float v = Input.GetAxis("Vertical");
        cc.SimpleMove(new Vector3(h, 0, v) * speed);//会模拟重力
        //cc.Move(new Vector3(h, 0, v) * speed * Time.deltaTime);
        //由直接给定的速度移动
        Debug.Log(cc.isGrounded);
    }
    private void OnControllerColliderHit(ControllerColliderHit hit)
    {
        Debug.Log(hit.collider);//输出碰到的物体
    }
}

Mesh的设置

Mesh是一个网格，控制模型的外观

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

public class MeshAndMat : MonoBehaviour {
    public Mesh mesh;
    // Use this for initialization
    void Start () {
        GetComponent<MeshFilter>().sharedMesh = mesh;//速度快
        Debug.Log(GetComponent<MeshFilter>().mesh == mesh);
    }
}

Material材质类

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

public class MeshAndMat : MonoBehaviour {
    private Material mat;
    void Start () {
        mat = GetComponent<MeshRenderer>().material;
    }
    // Update is called once per frame
    void Update () {
        mat.color = Color.Lerp(mat.color, Color.red, Time.deltaTime);
    }
}

Unity API方法变更

unity 4.x 5.x 2017
GetComponent() 代替 rigidbody2D
GetComponent() 代替 rigidbody
GetComponent() 代替 audio
Unity 5.3:
ParticleSystem main = smokePuff.GetComponent();
main.startColor

代码如下：

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

public class UnityAPIChange : MonoBehaviour {
    private Rigidbody rgd;
    // Use this for initialization
    void Start () {
        rgd = GetComponent<Rigidbody>();
    }
    // Update is called once per frame
    void Update () {
        //rigidbody.AddForce(Vector3.one);
        //rgd.AddForce(Vector3.one);
        //audio.Play();//弃用的
        //GetComponent<AudioSource>().Play();
        //GetComponent<Rigidbody2D>();
        //GetComponent<MeshRenderer>();
    }
}

Unity API方法变更2-粒子系统变更

Unity 5.5+:
ParticleSystem.MainModule main = smokePuff.GetComponent().main;
main.startColor

Unity API方法变更3-场景切换相关API变更

SceneManagement 代替 Application
OnLevelWasLoaded() 在 Unity 5中被弃用了。
2D/3D sound 如何设置2D/3D声音

//Application.LoadLevel("Level2");//过时的
SceneManager.LoadScene("Scene2");//加载场景2
Scene scene = SceneManager.GetActiveScene();//正在运行的场景
SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);//重新加载