koobas.hobune.stream
GUI.Drawtexture "nullreferenceexception"
Hey all,
I have a simple ray cast script that when i click on an object and it is a poster, it should show a full screen image, of that poster.
This is my code so far and it is coming up with some strange instance error i dont get
Most of the code is copied from the unity GUI.Drawtexture example, i have just added raycasthit detection and tag filtering.
The error is:
NullReferenceException: Object reference not set to an instance of an object
var aTexture : Texture;
function Update() {
var hit: RaycastHit;
var ray = Camera.main.ViewportPointToRay(new Vector3(0.5, 0.5, 0.0));
if (Input.GetButtonUp("Fire1")) {
if (Physics.Raycast(ray, hit)) {
if (hit.transform.tag == "poster")
{
Debug.Log("A POSTER");
Debug.Log(hit.transform.gameObject.name);
GUI.DrawTexture(Rect(10,10,60,60), aTexture, ScaleMode.ScaleToFit, true, 10.0f);
}
else{ Debug.Log("NOT A POSTER"); }
}
}
}
You haven't set the value of aTexture anywhere. If you the texture of the gameObject the RayCast hit, then you will have to use aTexture = hit.transform.renderer.sharedMaterial.mainTexture to assign your texture.
Oh! I just figured. You will have to put the code in the void OnGUI() function. That may have been the problem. You should have added that as a comment, by the way. if this answers your problem, please accept this answer.
var aTexture : Texture; created a variable in the inspector to select a texture.
I noticed the main line
GUI.DrawTexture(Rect(0, 0, Screen.width, Screen.height), aTexture, ScaleMode.ScaleToFit, true);
it does not error in its own function, but if it is in the update function it shows the instance error.
perhaps I can put it into its own function and call it on a raycast hit?
You should have added this as a comment. See my comment on my answer.
