[Unity3D] 10 lines of code to implement a simple character movement rotation script

I. Introduction

Today I share a simple character movement script, mainly using colliders and rigid body components. The code is simple and easy to understand, and it has strong reusability and scalability. Let's take a look with me.

Second, the effect chart

Third, the code

using UnityEngine;

public class RunTest1 : MonoBehaviour
{
    public float forwardSpeed;          //前进的速度
    public float backwardSpeed;         //后退的速度
    public float rotateSpeed;           //旋转速度
    private Vector3 velocity;

    void FixedUpdate()
    {
    	//获取到横轴 前后 的输入 也就是键盘W 和S的输入
        float h = Input.GetAxis("Horizontal");
        //获取到纵轴 左右 的输入 也就是键盘A 和D的输入
        float v = Input.GetAxis("Vertical");
        //从上下键的输入，获取到Z轴的输入量
        velocity = new Vector3(0, 0, v);
        //将世界坐标转化为本地坐标
        velocity = transform.TransformDirection(velocity);
        //判断是前进还是后退
        if (v > 0.1)
        {
            velocity *= forwardSpeed;
        }
        else
        {
            velocity *= backwardSpeed;
        }
        //移动自身坐标
        transform.localPosition += velocity * Time.fixedDeltaTime;
        //旋转角度
        transform.Rotate(0, h * rotateSpeed, 0);
    }
}

Fourth, the implementation steps

1. First, we design the scene first
. Create a new Plane in the scene, set the width and length

2. Create a new Capsule, assuming this is the protagonist

Add a rigid body component, lock the rotation of XYZ

3. Set the camera follower to

be directly set as a child object of Capsule , Simple and rough, and then set the position rotation angle

4. Write RunTest.cs script

using UnityEngine;

public class RunTest1 : MonoBehaviour
{
    public float forwardSpeed;          //前进的速度
    public float backwardSpeed;         //后退的速度
    public float rotateSpeed;           //旋转速度
    private Vector3 velocity;

    void FixedUpdate()
    {
        float h = Input.GetAxis("Horizontal");
        float v = Input.GetAxis("Vertical");
        
        velocity = new Vector3(0, 0, v);
        velocity = transform.TransformDirection(velocity);
        if (v > 0.1)
        {
            velocity *= forwardSpeed;
        }
        else
        {
            velocity *= backwardSpeed;
        }
        transform.localPosition += velocity * Time.fixedDeltaTime;
        transform.Rotate(0, h * rotateSpeed, 0);
    }
}

5. Assign the script to the Capsule object

Set the parameters

5. Run to
start a happy play