NullReferenceException on a javascript file

Unity Engine
1

Hi all! :slight_smile:
I got today a problem with a javascript file on my Player. This is a stamina-sprint script.

#pragma strict
@script RequireComponent( AudioSource )
public var walkSounds : AudioClip[];
public var runSounds : AudioClip[];
public var walkAudioSpeed : float = 0.4;
public var runAudioSpeed : float = 0.2;
private var walkAudioTimer : float = 0.0;
private var runAudioTimer : float = 0.0;
var isWalking : boolean = false; // these can be private
var isRunning : boolean = false; // these can be private
public var walkSpeed : float = 8; // regular speed
public var runSpeed : float = 20; // run speed
public var sprintDuration : float = 10.0;
private var sprintTimer : float = 0;
private var stamina : float = 0.0;
public var staminaTexture : Texture;
private var chCtrl: CharacterController;
private var chMotor: CharacterMotor;
function Start()
{
    chCtrl = GetComponent(CharacterController);
    chMotor = GetComponent(CharacterMotor);
}
function Update()
{
    SetSpeed();
    if ( chCtrl.isGrounded )
    {
        PlayFootsteps();
    }
    else
    {
        walkAudioTimer = 1000.0;
        runAudioTimer = 1000.0;
    }
}
function SetSpeed()
{
    var speed = walkSpeed;
    if ( Input.GetAxis( "Horizontal" ) || Input.GetAxis( "Vertical" ) )
    {
        if ( Input.GetKey( "left shift" ) || Input.GetKey( "right shift" ) )
        {
            // Running
            isWalking = false;
            isRunning = true;
        }
        else
        {
            // Walking
            isWalking = true;
            isRunning = false;
        }
    }
    else
    {
        // Stopped
        isWalking = false;
        isRunning = false;
    }
    // check the sprint timer
    if ( isRunning )
    {
        sprintTimer += Time.deltaTime;
        if ( sprintTimer > sprintDuration )
        {
            isRunning = false;
            isWalking = true;
        }
        else if ( chCtrl.isGrounded )
        {
            speed = runSpeed;
        }
    }
    else
    {
        sprintTimer -= Time.deltaTime;
    }
    sprintTimer = Mathf.Clamp( sprintTimer, 0, sprintDuration );
    chMotor.movement.maxForwardSpeed = speed;
    stamina = 1.0 - ( sprintTimer / sprintDuration );
}
function PlayFootsteps()
{
    // Play Audio
    if ( isWalking )
    {
        if ( walkAudioTimer > walkAudioSpeed )
        {
            audio.Stop();
            audio.clip = walkSounds[ Random.Range( 0, walkSounds.Length ) ];
            audio.Play();
            walkAudioTimer = 0.0;
        }
    }
    else if ( isRunning )
    {
        if ( runAudioTimer > runAudioSpeed )
        {
            audio.Stop();
            audio.clip = runSounds[ Random.Range( 0, runSounds.Length ) ];
            audio.Play();
            runAudioTimer = 0.0;
        }
    }
    else
    {
        audio.Stop();
    }
    // increment timers
    walkAudioTimer += Time.deltaTime;
    runAudioTimer += Time.deltaTime;
}
function OnGUI()
{
    if ( staminaTexture ) // check there is a texture so it doesn't error if not
    {
        GUI.DrawTexture( Rect( 15, Screen.height - 20, 100 * stamina, 12 ), staminaTexture );
    }
}

And I attached a screen capture about the issue.
(Sorry for the big object mess :roll_eyes: )

The sprint doesn’t work, and the stamina texture won’t show up, the sound effect won’t play.
The script detects when I press the left shift, (see on the picture below at the is walking, is running). But my charater won’t sprint.

1753473--110908--Képkivágás.PNG.jpg
1753473--110908--Képkivágás.PNG.jpg1919×1079 433 KB

2

The error tells you something is null
Look at the line number (it says 103, but you have cropped the posted code so i don’t know)
Debug.Log the variables in line 103 to find out which one is null

3

My bad, there is the right code, and I attached the new picture about the issue.
From what can this happened? I don’t do anything with this script, or with my character.
I just placed some objects (models etc.) on the terrain.
And when I open up a new project and played this script on the character, It worked fine.

#pragma strict
@script RequireComponent( AudioSource )
public var walkSounds : AudioClip[];
public var runSounds : AudioClip[];
public var walkAudioSpeed : float = 0.4;
public var runAudioSpeed : float = 0.2;
private var walkAudioTimer : float = 0.0;
private var runAudioTimer : float = 0.0;
var isWalking : boolean = false; // these can be private
var isRunning : boolean = false; // these can be private
public var walkSpeed : float = 8; // regular speed
public var runSpeed : float = 20; // run speed
public var sprintDuration : float = 10.0;
private var sprintTimer : float = 0;
private var stamina : float = 0.0;
public var staminaTexture : Texture;
private var chCtrl: CharacterController;
private var chMotor: CharacterMotor;
function Start()
{
    chCtrl = GetComponent(CharacterController);
    chMotor = GetComponent(CharacterMotor);
}
function Update()
{
    SetSpeed();
    if ( chCtrl.isGrounded )
    {
        PlayFootsteps();
    }
    else
    {
        walkAudioTimer = 1000.0;
        runAudioTimer = 1000.0;
    }
}
function SetSpeed()
{
    var speed = walkSpeed;
    if ( Input.GetAxis( "Horizontal" ) || Input.GetAxis( "Vertical" ) )
    {
        if ( Input.GetKey( "left shift" ) || Input.GetKey( "right shift" ) )
        {
            // Running
            isWalking = false;
            isRunning = true;
        }
        else
        {
            // Walking
            isWalking = true;
            isRunning = false;
        }
    }
    else
    {
        // Stopped
        isWalking = false;
        isRunning = false;
    }
    // check the sprint timer
    if ( isRunning )
    {
        sprintTimer += Time.deltaTime;
        if ( sprintTimer > sprintDuration )
        {
            isRunning = false;
            isWalking = true;
        }
        else if ( chCtrl.isGrounded )
        {
            speed = runSpeed;
        }
    }
    else
    {
        sprintTimer -= Time.deltaTime;
    }
    sprintTimer = Mathf.Clamp( sprintTimer, 0, sprintDuration );
    chMotor.movement.maxForwardSpeed = speed;
    stamina = 1.0 - ( sprintTimer / sprintDuration );
}
function PlayFootsteps()
{
    // Play Audio
    if ( isWalking )
    {
        if ( walkAudioTimer > walkAudioSpeed )
        {
            audio.Stop();
            audio.clip = walkSounds[ Random.Range( 0, walkSounds.Length ) ];
            audio.Play();
            walkAudioTimer = 0.0;
        }
    }
    else if ( isRunning )
    {
        if ( runAudioTimer > runAudioSpeed )
        {
            audio.Stop();
            audio.clip = runSounds[ Random.Range( 0, runSounds.Length ) ];
            audio.Play();
            runAudioTimer = 0.0;
        }
    }
    else
    {
        audio.Stop();
    }
    // increment timers
    walkAudioTimer += Time.deltaTime;
    runAudioTimer += Time.deltaTime;
}
function OnGUI()
{
    if ( staminaTexture ) // check there is a texture so it doesn't error if not
    {
        GUI.DrawTexture( Rect( 15, Screen.height - 20, 100 * stamina, 12 ), staminaTexture );
    }
}

1753532--110914--fix.PNG
1753532--110914--fix.PNG1508×348 21.7 KB