I have a 3D player in Unity3d that passes through objects, what should I do?

Question

C++ / C#

They have BoxCollider and Rigidbody and the player has the same. Here is the script. Help me please!

spoiler

using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class Controller : MonoBehaviour {
private Rigidbody rb;

[SerializeField]
private float speed = 5.0f;

[SerializeField]
private float lookSpeed = 3.0f;

private Vector3 velocity = Vector3.zero;
private Vector3 rotation = Vector3.zero;


void Start() {
rb = this.GetComponent();
}

public void Move (Vector3 _velocity){
velocity = _velocity;
}

public void Rotate (Vector3 _rotation){
rotation = _rotation;
}

void FixedUpdate () {
PerformMove ();
PerformRotation ();
}

void PerformMove () {
if (velocity != Vector3.zero)
rb.MovePosition (rb.position + velocity * Time.fixedDeltaTime);
}

void PerformRotation () {
rb.MoveRotation (rb.rotation * Quaternion.Euler (rotation));
}

void Update() {
float xMov = Input.GetAxis ("Horizontal");
float zMov = Input.GetAxis ("Vertical");

Vector3 movHor = Vector3.right * xMov;
Vector3 movVer = Vector3.forward * zMov;

Vector3 velocity = (movHor + movVer).normalized * speed;

Move (velocity);

float yRot = Input.GetAxis ("Mouse X");
Vector3 rotation = new Vector3 (0f, yRot, 0f) * lookSpeed;

Rotate (rotation);
}
}

Answer 1

And why would he stumble on the walls if you turned on the kinematics and directly control the object, and does not use physics.