Null Reference Problem - Emergency - Help! (same prob/diff variables)

[djkr_1]

Hi… Having " NULL REFERENCE " Problem, even though the variable is set to ‘1’, its coming up somewhere as NULL - then in mid loading- I’m getting this error:

The main problem is now this:

I found another place the error has jumped to.

Fixed some things,but had an error in this next section (Line 99):

// GUI MATRIX
if(matrixAngle != previousAngle || matrixPosition != prevMatrixPosition) { //only calculate new Quaternion if angle changed
	quat.eulerAngles = Vector3(0.0, 0.0, matrixAngle);

(It says the cause is x 2:
swipeCtrl.maxValue = 1;
and
var offset : float = swipeCtrl.smoothValue - Mathf.Round(swipeCtrl.smoothValue);
and the second problem.
NOTE: I have multiple scripts that are copied with different title names - but same programming - just changed the titles of the files, and the name of some variables to suite the multiple copies of this script.

NullReferenceException: Object reference not set to an instance of an object
ImageDisplay4.Awake () (at Assets/Scripts/ImageDisplay4.js:63)
UnityEngine.Object:Instantiate(Object)
$:MoveNext() (at Assets/viewer-scripts/LOADCONTROL.js:265)

Here is the main chunk of code thats having the problem…

	//Set up SwipeControl
//swipeCtrl.partWidth = img.width;
swipeCtrl.maxValue = 1;
if(expandInputAreaToFullWidth) {
	swipeCtrl.SetMouseRect(new Rect(-Screen.width * 0.5, imgRect.y, Screen.width, imgRect.height)); // Use image-height for the input-Rect, but full screen-width
} else {
	 swipeCtrl.SetMouseRect(imgRect); //Use the same Rect as the images for input
}
swipeCtrl.CalculateEdgeRectsFromMouseRect(imgRect);
swipeCtrl.Setup();
/*
//Determine center position of the Dots
if(dotRelativeCenterPos == Vector2.zero) dotRelativeCenterPos.y = imgRect.height * 0.5 + 14;
dotRelativeCenterPos = new Vector2((imgRect.x + imgRect.width * 0.5) + dotRelativeCenterPos.x, (imgRect.y + imgRect.height * 0.5) + dotRelativeCenterPos.y);

*/
if(centerMatrixOnScreen) {
matrixPosition.x += Mathf.Round(Screen.width * 0.5);
matrixPosition.y += Mathf.Round(Screen.height * 0.5)+176;//this is it adddown spawn extra space down
}

}

function OnGUI () {

// GUI MATRIX
if(matrixAngle != previousAngle || matrixPosition != prevMatrixPosition) { //only calculate new Quaternion if angle changed
	quat.eulerAngles = Vector3(0.0, 0.0, matrixAngle);
	previousAngle = matrixAngle;
	matrix = Matrix4x4.TRS(matrixPosition, quat, Vector3.one);	//If you're no longer tweaking
	prevMatrixPosition = matrixPosition;
	swipeCtrl.matrix = matrix; // Tell SwipeControl to use the same Matrix we use here
}
GUI.matrix = matrix;		

// IMAGES
var offset : float = swipeCtrl.smoothValue - Mathf.Round(swipeCtrl.smoothValue);
var mainPos : float = imgRect.x - (offset * imgRect.width);
if(Mathf.Round(swipeCtrl.smoothValue) >= 0 && Mathf.Round(swipeCtrl.smoothValue) < 1) {
	GUI.color.a = 1 - Mathf.Abs(offset);
	GUI.DrawTexture(new Rect(mainPos, imgRect.y, imgRect.width, imgRect.height), img);//[Mathf.Round(swipeCtrl.smoothValue)]);

// GUI.DrawTexture(new Rect(mainPos, imgRect.y, imgRect.width, imgRect.height), img);//[Mathf.Round(swipeCtrl.smoothValue)]);

}

Thanks for the help, in advance…

Kris

[SisterKy]

Are you accessing swipeCtrl anywhere above the line where you get the error and it is successful? (I guess not)

My bet is you try to reference some SwipeControl-script but this assignment fails. Now if you try to access a variable in the SwipeControl-script (that has not been referenced successfully) it gives you the nullreferenceexcept. So your problem is most likely somewhere above the code-sniplet you posted.

What is a Null Reference Exception In Unity. - Unity Answers

Greetz, Ky.

[djkr_1]

Found the Solution:

Thanks for your replies!.. I ended up creating a prefab that I could drag and drop into the Variable that had the Null (within Unity 3D).

Again, I appreciate your responses!

Cheers,
Kris