Unity study notes (1) - various operations of objects

1. Get the object object mounted on the script component

gameObject

2. Set the visibility of object objects

gameObject.SetActive(true);
gameObject.SetActive(false);

3. Get object

1. Get script by name

GameObject.Find("Object");
//1.GameObject.Find（),无法找到未激活的物体
//2.GameObject.Find（)需要遍历场景的所有物体，从性能上看是十分低效的。
//注：它是全局查找，所以如果要查找子对象的话，用 transform.Find 更方便。

transform.Find("object name");
//查找下一层次的子物体
//它只会查询Hierarchy中下一层次的物体，不会递归地向下查找
//如果需要获取物体根节点下指定路径的子物体，可以用以下方式：

gameObject.transform.Find("SelectedEffect/遮罩/渐变")
//获取子物体中的组件

2. Find objects by tag

//以通过物体的标签直接获得物体，使用GameObject.FindGameObjectWithTag（）方法即可，可高效地查找物体
//获取第一个标签为Object的物体
GameObject ob = GameObject.FindGameObjectWithTag("Object");
//获取所有标签为Object的物体，返回值是一个数组
GameObject[] obs = GameObject.FindGameObjectsWithTag("Object");

4. Get components using scripts

//获得其他物体object的刚体
GameObject ob = GameObject.Find("object");
Rigidbody obrb = ob.GetComponent<Rigidbody>();

5. Move, scale, and rotate objects

//1、移动
//物体向x方向移动1.5个单位
transform.Translate(1.5f,0,0);
//或
transform.position += new Vector3(1.5f,0,0);

//稳定帧率
transform.Translate(1.5f*Time.deltaTime,0,0);
//或
transform.position += new Vector3(1.5f*Time.deltaTime,0,0);

//2、缩放
//cube.transform.localScale *= 1.2f;

//3、旋转
//cube.transform.Rotate (new Vector3(0, 10, 0));
//围绕球体旋转物体
//cube.transform.RotateAround (cylinder.transform.position, Vector3.up, 10);

6. Move objects via keyboard

float horizontal = Input.GetAxis("Horizontal");
float vetical = Input.GetAxis("Vetical");
 
transform.Translate(horizontal*speed*Time.deltaTime,vetical*speed*Time.deltaTime,0);
//或
transform.position += new Vector3(horizontal*speed*Time.deltaTime,vetical*speed*Time.deltaTime,0);