3d wasd movement

Unity Engine
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1 
using UnityEngine;

[RequireComponent(typeof(CharacterController))]
public class PlayerMovement : MonoBehaviour
{
    public float moveSpeed = 6f;            // Speed of movement
    public float rotationSpeed = 3f;       // Speed of rotation
    public float gravity = -9.81f;          // Gravity force
    public float jumpHeight = 1.5f;         // Height of the jump
    public Transform cameraTransform;       // Reference to the camera's transform

    private CharacterController controller;
    private Vector3 velocity;
    private bool isGrounded;

    void Start()
    {
        controller = GetComponent<CharacterController>();
    }

    void Update()
    {
        // Check if the player is grounded
        isGrounded = controller.isGrounded;

        if (isGrounded && velocity.y < 0)
        {
            velocity.y = -2f; // Reset the downward velocity when grounded
        }

        // Get input from WASD keys
        float moveX = Input.GetAxis("Horizontal");
        float moveZ = Input.GetAxis("Vertical");

        // Calculate movement direction relative to the camera
        Vector3 direction = cameraTransform.right * moveX + cameraTransform.forward * moveZ;
        direction.y = 0f; // Keep movement on the horizontal plane

        // Normalize the direction vector to prevent faster diagonal movement
        if (direction.magnitude >= 0.1f)
        {
            // Move the player
            controller.Move(direction.normalized * moveSpeed * Time.deltaTime);

            // Smoothly rotate the player towards the movement direction
            Quaternion targetRotation = Quaternion.LookRotation(direction);
            transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, rotationSpeed * Time.deltaTime);
        }

        // Handle gravity
        velocity.y += gravity * Time.deltaTime;
        controller.Move(velocity * Time.deltaTime);

        // Jumping (optional)
        if (Input.GetButtonDown("Jump") && isGrounded)
        {
            velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
        }
    }
}
2

Also feel free to mess around with the script settings by changing the gravity, turn speed, and move speed. hope this helps!

3

also don’t forget to attach the player to the part if the script where it says camera transform

4

Be careful here: calling Move twice in one frame can lead to missing ground contact issues.

I wrote about this before: the Unity example code in the API no longer jumps reliably.

If you call .Move() twice in one single frame, the grounded check may fail.

I reported it to Unity via their docs feedback in October 2020. Apparently it is still broken:

Here is a work-around:

I recommend you also go to that same documentation page and ALSO report that the code is broken.

When you report it, you are welcome to link the above workaround. One day the docs might get fixed.

If you would prefer something more full-featured here is a super-basic starter prototype FPS based on Character Controller (BasicFPCC):

That one has run, walk, jump, slide, crouch… it’s crazy-nutty!!