Unity learning notes - six common functions of object movement

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1.Transform.Translate

Use this method to modify the position , Will ignore other objects , direct penetration .

1.1 Syntax

//1. Using three-dimensional coordinates Translation For mobile 
Translate(Vector3.translation,[Space.relativeTo =Space.self]);
//2. utilize x,y,z Coordinate transformation of axis 
Translate(float x,float y,float z,[Space.relativeTo =Space.self]);
//3. Move relative to the specified object 
Translate(Vector3 translation,[Transform relativeTo]);
Translate(float x,float y,float z,[Transform relativeTo])
//[] Internal parameters are optional parameters , The default is the world coordinate system   

1.2 Example

 void Update()
    {    gameObject.transform.Translate(Vector3.forward);
    }

2.Vectoe3.Lerp

The linear change is relatively smooth , In line with the actual situation

2.1 Syntax

Vector3.Lerp(Vector3 a,Vector3 b,float c)

Parameters	explain
a	The starting position
b	Destination location
t	stay a~b Percentage of movement between

2.2 Example

public Vector3 targetpositon = new Vector3(5,4,10);
void Update()
    {
        var t =1/(transform.position - targetpositon).magnitude;
        gameObject.transform.position = Vector3.Lerp(transform.position, targetpositon, t*0.01f);
    }

3. Vector3.SmoothDamp

3.1 Syntax

Vector3 SmoothDamp(Vector3 current, Vector3 target, ref Vector3 currentVelocity, float smoothTime, float maxSpeed = Mathf.Infinity, float deltaTime = Time.deltaTime);

Parameters	explain
current	The present position
target	Destination location
currentVelocity	Current speed , Each call will modify its value
smoothTime	The ideal time to reach the target location
maxSpeed	Maximum allowable speed （optional）
deltaTime	The difference between the previous frame rate and the next frame rate

4.Rigidbody

By adding rigid body components to objects , Modify the velocity value of the rigid body

4.1Example

private Rigidbody rb;
    void Start()
    {
        // Get the rigid body component 
        rb= GetComponent<Rigidbody>();
    }
    // Update is called once per frame
    void Update()
    {
        rb.velocity =new Vector3(1,0,0);// Just set up x The directional velocity is 1
    }

5.AddForce

5.1 Syntax

AddForce(Vector3 force, ForceMode mode = ForceMode.Force);
AddForce(float x, float y, float z, ForceMode mode = ForceMode.Force);

5.2 Example

  private Rigidbody rb;
    void Start()
    {
        rb= GetComponent<Rigidbody>();
    }
    // Update is called once per frame
    void Update()
    {
		// Each time you press the space bar, you add x Directional force 
        if(Input.GetKeyDown(KeyCode.Space))
        {
            rb.AddForce(new Vector3(10, 0, 0));
        } 
    }

6. MoveTowards

6.1 Syntax

Vector3 MoveTowards(Vector3 current, Vector3 target, float maxDistanceDelta);
// The current position , Target location , The distance of each move .

6.2 Example

 public float speed;
 public Vector3 targetposition= Vector3.zero;// Set the target location 
    // Update is called once per frame
    void Update()
    {
        float step = speed * Time.deltaTime; //  Calculate the distance 
       gameObject.transform.position = Vector3.MoveTowards(transform.position, targetposition, step);
    }