Question Sprint Functionality Not Working

I'm trying to get my player to run when I press the left shift down, but no matter how I try and modify the code, it only ever moves according to walkSpeed and never to sprintSpeed even though I know that the velocity is being set to sprintSpeed when I press left shift down. Any help would be appreciated.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class CharacterController : MonoBehaviour
6. {
7.     //8 direction character controller
8.     //https://www.youtube.com/watch?v=cVy-NTjqZR8
9.  
10.     float velocity = 5;
11.     public float turnSpeed;
12.     public float walkSpeed;
13.     public float sprintSpeed;
14.     public bool isSprinting;
15.  
16.     Animator anim;
17.  
18.     Vector2 playerInput;
19.     float angle; //to know how to rotate player
20.  
21.     Quaternion targetRotation; //quaternion used to represent rotations
22.     Transform cam; // to keep track of camera angles
23.  
24.     // Start is called before the first frame update
25.     void Start()
26.     {
27.         cam = Camera.main.transform; //this accesses the main camera
28.         anim = GetComponent<Animator>();
29.  
30.     }
31.  
32.     // Update is called once per frame
33.     void Update()
34.     {
35.         GetInput();//get input every frame, so the thing stops when
36.         if (Mathf.Abs(playerInput.x) < 1 && Mathf.Abs(playerInput.y) < 1)
37.         { //this stops the character from moving when no input
38.             anim.SetInteger("condition", 0);
39.  
40.             return;
41.         }
42.  
43.         else
44.         {
45.             anim.SetInteger("condition", 1);
46.         }
47.  
48.         CalculateDirection();
49.         Rotate();
50.         if (Input.GetKeyDown(KeyCode.LeftShift))
51.         {
52.             isSprinting = true;
53.         }
54.  
55.         else
56.         {
57.             isSprinting = false;
58.         }
59.         Move();
60.  
61.  
62.     }
63.  
64.  
65.     void GetInput()
66.     {
67.         playerInput.x = Input.GetAxisRaw("Horizontal");
68.         playerInput.y = Input.GetAxisRaw("Vertical");
69.     }
70.  
71.     void CalculateDirection()
72.     {
73.         angle = Mathf.Atan2(playerInput.x, playerInput.y); //give us radians, tangent between up and horizontal
74.         angle = Mathf.Rad2Deg * angle; // to convert to degrees
75.         angle += cam.eulerAngles.y;
76.     }
77.  
78.     void Rotate()
79.     {
80.         targetRotation = Quaternion.Euler(0, angle, 0); // convert euler angles to quaternions
81.         transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, turnSpeed * Time.deltaTime);
82.     }
83.  
84.     void Move()
85.     {
86.         if(isSprinting == true)
87.         {
88.             velocity = sprintSpeed;
89.             Debug.Log("debug: " + sprintSpeed + "velocity: " + velocity);
90.  
91.         }
92.  
93.         else
94.         {
95.             velocity = walkSpeed;
96.         }
97.  
98.         Debug.Log("debug velocity: " + velocity);
99.  
100.         anim.SetFloat("velocity", velocity / 10);
101.  
102.         transform.position += transform.forward * walkSpeed * Time.deltaTime;
103.  
104.     }
105.  
106.  
107. }
108.  

 

Code (CSharp):

1. Input.GetKeyDown(KeyCode.LeftShift)

This will return true only during the exact frame when the user first presses the key down. It will return false in all other frames, so you are likely only getting one frame of sprinting, then back to walking. Try this instead:

Code (CSharp):

1. Input.GetKey(KeyCode.LeftShift)

More info:
https://docs.unity3d.com/ScriptReference/Input.GetKeyDown.html
https://docs.unity3d.com/ScriptReference/Input.GetKey.html

 

Thanks so much that worked perfectly!

 

I also noticed on line 102 you are always using walkSpeed:

Code (CSharp):

1. transform.position += transform.forward * walkSpeed * Time.deltaTime;

Did you mean this:

Code (CSharp):

1. transform.position += transform.forward * velocity * Time.deltaTime;