Unity玩家移动简单实现

```csharp
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class PlayerControler : MonoBehaviour
{
    public Rigidbody2D rb;
    public float speed;
    void Update()
    {
        Movement();
    }
    void Movement()
    {
        rb.velocity = new Vector2(0, 0);
        float horizontalmove = Input.GetAxis("Horizontal");
        float verticalmove = Input.GetAxis("Vertical");
        if (horizontalmove != 0|| verticalmove != 0)
        {
            rb.velocity = new Vector2(horizontalmove * speed, rb.velocity.y);
            rb.velocity = new Vector2(rb.velocity.x, verticalmove * speed);
        }
    }
}
```
2D下的简单实现，3D同理，不过得绑个刚体。
```csharp
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Player : MonoBehaviour
{
    public Rigidbody rb;
    public float speed;
    public void Update()
    {
        rb.velocity = new Vector3(0, 0, 0);
        float horizontalmove = Input.GetAxis("Horizontal");
        float verticalmove = Input.GetAxis("Vertical");
        if (horizontalmove != 0 || verticalmove != 0)
        {
            rb.velocity = new Vector3(horizontalmove * speed, 0, rb.velocity.z);
            rb.velocity = new Vector3(rb.velocity.x, 0, verticalmove*speed);
        }
    }
}
```
丝滑实现详见:https://github.com/Matthew-J-Spencer/Ultimate-2D-Controller/blob/main/Scripts/PlayerController.cs

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