Gizmos.GUIDrawTexture() How does it work?

Can someone please give me a working example of this? I have tried for about 4 hours to get a GUITexture gizmo to show on screen and there is nothing visible.

Here is what I am doing:

Code (csharp):

1.  
2. var buttonGizmo : Texture2D;
3. var pixelPosX = 0;
4. var pixelPosY = 0;
5.  
6. function OnDrawGizmos()
7. {
8.         Gizmos.DrawGUITexture(Rect(pixelPosX,pixelPosY,buttonGizmo.width,buttonGizmo.height,buttonGizmo);
9. }

I'm not sure why that doesn't work , I have the Gizmos button turned on in the Game View, maybe I just don't understand how DrawGUITexture works.

Thank you for any help.

 

Gizmos are only viewable in the scene view unless you toggle gizmos on in the game view. However the documentation on this particular function is quite sparse. I don't get how the Rect parameter is used.

 

I know this is an old thread, but i'm experiencing the same problem with DrawGUITexture. No matter what i try, the texture doesn't show up.
Nor in the scene view neither in the game view(i have Gizomos toggled on).
If someone have found a solution in the meanwhile, can help me?

 

Welcome to the forum, teaMate!

Can you post the code that you are having problems with?

 

Thank you!
Ok here is my code

Code (csharp):

1.  
2. private var mainGUI : DrawMainMenu;
3. var gui_reference1 : Texture;
4. ...
5. ...
6. function Start(){
7.  mainGUI = GetComponent(DrawMainMenu);
8.  ...
9. }
10. ...
11. ...
12. function OnDrawGizmo(){
13.  
14.  Gizmos.DrawGUITexture(Rect(mainGUI.tab.inset), gui_reference1);
15.  
16. }
17.  

I got no errors or warnings.
Everything is fine but it doesn't draw any texture on viewport.
I need this texture to help in the building of the gui, to better understand the position of elements on screen, without play the scene everytime.

 

I hate to tell you this, but the problem is that the function is really supposed to be called OnDrawGizmos with an S at the end. Declaring a function called OnDrawGizmo is not an error but it doesn't get called automatically by Unity.

 

Yes you're right. I appreciate your help. I'm feeling a bit "stupid"...oh well.
Thank you again

 

I'm still having problems figuring out how the Rect parameter is used.
From the scripting reference:

But it seems it doesn't use screen coordinates.
Doesn't it works similar to a GUI element? Am i missing something?

 

The description is a bit misleading. What actually happens is that a texture gets drawn in the scene in the XY plane (ie, it treats the plane as though it were a "screen" with the Z coordinate ignored). The texture's bottom left corner and also its width and height are given in world coordinates.

 

andeeee, this was really helpful!

I was looking for that texture too, but couldn't find it until i made a huuuuge zoom-out. See the image in the attach.

The documentation is not misleading - it is EVIL:

:mrgreen:

http://unity3d.com/support/documentation/ScriptReference/Gizmos.DrawGUITexture.html

 

Don't even try Gizmos.matrix here. It does nothing.

 

This is an OLD post, but turns out that the RECT relates to world coordinates. So 0,0 puts it at transform.position... almost. I seem to need to make it 0, -1 for position.

 

Not intending to necrobump the thread, but I also had a hard time with 'UnityEngine.Gizmos.DrawGUITexture' apparently not working as intended. For the sake of future googlers, here is a working example:


using System;
using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif

public class MyGizmo : MonoBehaviour {
public Texture texture;
public Vector2 viewSize = Vector2.one;

private Rect rect;
private Texture _tex;
private static Texture defautlTexture; // shared default texture

public static readonly Color fullTransparent = new Color(0, 0, 0, 0);

public void OnDrawGizmos() {
#if UNITY_EDITOR
if(defautlTexture == null) defautlTexture = AssetDatabase.LoadAssetAtPath<Texture>("Assets/defaultGizmo.png");
#endif

if(_tex == null) {
if(texture!=null) _tex = texture;
else if(defautlTexture != null) _tex = defautlTexture;
else {
Debug.Log("OnDrawGizmos: No texture assigned.");
return;
}
}

rect = new Rect((Vector2)transform.position - Vector2.one, viewSize);
// render _tex instead of texture for alowing to load and render a default texture without setting the default texture reference to the inspector field
Gizmos.DrawGUITexture(rect, _tex);

// draw a full transparent box just to make the texture gizmo clickable
Gizmos.color = fullTransparent;
Gizmos.DrawCube(transform.position, Vector3.one);
}

public void OnDrawGizmosSelected() => OnDrawGizmos();
}

 

Gizmos.DrawGUITexture - still trash in Unity 2019.4. Docs are bad. Hard to believe anyone checked this before publishing it: https://docs.unity3d.com/ScriptReference/Gizmos.DrawGUITexture.html

It's only a couple of lines long, and yet that source code is blatantly wrong (and appears not to have been tested).

EDIT: The method itself? Badly designed, does an almost useless thing (who thought it was a good idea to arbitrarily place the texture at a random place in Z and not allow us to position it?). Unity is a *3D* engine, and the rest of the engine often positions things in Z, but this stupid method messes that up. Argh. So many bugs caused by this!

 

Did you find a workaround? If only they'd allow icons in any folder and not just Assets\Gizmos! Or can you place them anywhere now?

 

All of the Gizmos.* API needs to be avoided / deleted - it's not being maintained, it's not had fixes in many years, and the last bug I submitted got rejected with little more than "yeah we don't see a problem with the fact this doesn't work, even though we had to create an internal method to workaround it, that you can see in our source-code - so our own staff feel it's broken, but we're not going to fix it".

Rewrite Gizmos yourself, and do it properly - don't use Unity's junk code (that they don't care about any more )