Dash script made by gadonj18 in #unity3d irc on freenode

PlayerMove.cs

using UnityEngine;
using System.Collections;
 
public class PlayerMove : MonoBehaviour {
    Vector3 moveDir;
    Rigidbody rb;
    float speed = 5f;
    float dashCooler = 0.5f;
    KeyCode dashKey;
    bool dashing = false;
    Vector3 dashDir;
    float dashTimer = 0f;
 
    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }
   
    void Update()
    {
        moveDir = Vector3.zero;
        if (Input.GetKey(KeyCode.W))
        {
            moveDir = Vector3.forward;
        }
        else if (Input.GetKey(KeyCode.S))
        {
            moveDir = -Vector3.forward;
        }
        else if (Input.GetKey(KeyCode.A))
        {
            moveDir = -Vector3.right;
        }
        else if (Input.GetKey(KeyCode.D))
        {
            moveDir = Vector3.right;
        }
 
        if (Input.GetKeyDown(KeyCode.W))
        {
            CheckDash(KeyCode.W, Vector3.forward);
        }
        else if (Input.GetKeyDown(KeyCode.S))
        {
            CheckDash(KeyCode.S, -Vector3.forward);
        }
        else if (Input.GetKeyDown(KeyCode.A))
        {
            CheckDash(KeyCode.A, -Vector3.right);
        }
        else if (Input.GetKeyDown(KeyCode.D))
        {
            CheckDash(KeyCode.D, Vector3.right);
        }
 
        dashCooler -= Time.deltaTime;
    }
 
    void CheckDash(KeyCode key, Vector3 dir)
    {
        if (dashCooler > 0f && dashKey == key)
        {
            dashing = true;
            dashDir = dir;
            dashTimer = 0.5f;
        }
        else
        {
            dashKey = key;
            dashCooler = 0.5f;
        }
    }
 
    void FixedUpdate()
    {
        if (dashing)
        {
            rb.MovePosition(rb.position + dashDir * speed * 2 * Time.deltaTime);
            dashTimer -= Time.deltaTime;
            if (dashTimer <= 0f)
            {
                dashing = false;
            }
        }
 
        if (moveDir != Vector3.zero)
        {
            rb.MovePosition(rb.position + moveDir * speed * Time.deltaTime);
        }
    }
}

Is there a way to throw in a cooldown?

Theres already one dashCooler it's at 0.5 om the top in public variables you can change that as far as adding a visual bar will have to track time left on coolDown and use a fill bar etc.

what do i attach this to and how do i map the actual function

you would attach the script to the player right?