Can't load mouse cursor texture on C#/Unity

Question

public class Cursor : MonoBehaviour 
{ 
     public Texture2D cursor; 
     public int cursorSizeX = 16; // default 
     public int cursorSizeY = 16; // default 

// Use this for initialization 
void Start () 
{ 
     Object temp = Resources.Load("Textures/CR_Cursor (Custom)"); 

     if (temp == null) 
     Debug.Log("Load Object Fail"); 

     cursor = (Texture2D)Resources.Load("Textures/CR_Cursor (Custom)"); 

     if (cursor == null) 
     Debug.Log("Load Cursor Fail"); 

     Screen.showCursor = false; 
} 

// Update is called once per frame 
void Update () 
{ 
     GUI.DrawTexture(new Rect(Event.current.mousePosition.x - cursorSizeX / 2,      Event.current.mousePosition.y - cursorSizeY / 2, cursorSizeX, cursorSizeY), cursor); 
}

no matter where I instantiate the cursor im sill getting NullReferenceException: Object reference not set to an instance of an object Cursor.Update (), what I am missing?

JRowan · Accepted Answer · 2014-09-19 00:24:28Z

2

you should put this line

GUI.DrawTexture(new Rect(Event.current.mousePosition.x - cursorSizeX / 2,      Event.current.mousePosition.y - cursorSizeY / 2, cursorSizeX, cursorSizeY), cursor);

inside of OnGUI() and not in Update

void OnGUI(){

GUI.DrawTexture(new Rect(Event.current.mousePosition.x - cursorSizeX / 2,      Event.current.mousePosition.y - cursorSizeY / 2, cursorSizeX, cursorSizeY), cursor); 

}

here is a chart concerning the lifecycle of script

Scripting Lifecycle

edited Sep 19, 2014 at 0:24

answered Sep 19, 2014 at 0:06

JRowan

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2 Comments

Ajna Over a year ago

That did it. Even so I see the mouse blinking sometimes, specially at the beginning of the scene. Any way to avoid it? I should use no Update() function then? If I did use one, OnGUI would be executed peviously or later than Update?

JRowan Over a year ago

i put up a script lifecycle chart and im pretty sure you can set the graphic for the mouse cursor in player setting somewhere

Codemaker2015 · Accepted Answer · 2023-08-21 02:45:50Z

0

Ensure that you have change the texture properties as following in Inspector window,

Texture Type: Cursor
Alpha Is Transparent: True
Read/Write: True
Generate Mip Maps: False

answered Aug 21, 2023 at 2:45

Codemaker2015

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