Hello guys,
I got that message, to me very weird, in correspondence of these lines of code. The object “i_SwitchCameras” exists in the scene and in the hierarchy, so why when I try to use it, I get this NULL Reference execption?
Thanks.
var gg = GameObject.Find("i_SwitchCameras");
if(i_MainGUIcamera) {
if(gg)
gg.GetComponent("i_SwitchCameras_Scripts").switchIso2Perspective();
}
return;
}
Does your i_SwitchCameras GameObject contain a component called “i_SwitchCameras_Scripts”?
yes it does
That’s an interesting using of the if statement. GameObject.Find returns the name of the game object, yet you are testing if(true). Are you sure that will work?
I would normally assign the the GameObject.Find to an object and often the script it contains to another object and then use that script object directly.
eg (for a script attached to my current object)
@script RequireComponent(EncodeDecode)
private var myEncodeDecode : EncodeDecode;
myEncodeDecode = GetComponent(EncodeDecode);
–PW
Could you show me a screenshot of the objectinspector with the selected i_SwitchCameras GameObject?
Maybe including the tree of scripts you use.
@Launchpad: GameObjects have a bool operator, his is basically testing for != null: http://unity3d.com/support/documentation/ScriptReference/Object-operator_bool.html?from=GameObject
Here it is.
I’m testing if(gg) only to check if the gg is different from Null. I thought that the GameObject.Find(“…”) would return a GameObject with named that way.
Thanks,
GC>
Couldn´t you post the whole script? And the Error Message including the StackTrace?
Ah yeah sorry: the stack says:
NullReferenceException: Object reference not set to an instance of an object
Boo.Lang.Runtime.RuntimeServices.Dispatch (System.Object target, System.String cacheKeyName, System.Type[ ] cacheKeyTypes, System.Object[ ] args, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory)
Boo.Lang.Runtime.RuntimeServices.Dispatch (System.Object target, System.String cacheKeyName, System.Object[ ] args, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory)
Boo.Lang.Runtime.RuntimeServices.Invoke (System.Object target, System.String name, System.Object[ ] args)
UnityScript.Lang.UnityRuntimeServices.Invoke (System.Object target, System.String name, System.Object[ ] args, System.Type scriptBaseType)
i_MainGUI.onGUI_SetIsoViewCamera () (at Assets/Standard Assets/iScripts/i_MainGUI.js:49)
i_MainGUI.buildGUI () (at Assets/Standard Assets/iScripts/i_MainGUI.js:27)
i_MainGUI.OnGUI () (at Assets/Standard Assets/iScripts/i_MainGUI.js:40)
function buildGUI(){
GUI.skin = i_skin;
var sx: int = 10;
var sy: int = 25;
GUI.tooltip = "";
if (GUI.Button(Rect(sx,sy,32, 32),GUIContent("","Clean Scene"), "New")) {
}
GUI.Label(Rect(sx,sy+30,50,50), GUI.tooltip,"tooltip");
GUI.tooltip = "";
if (GUI.Button( Rect(sx + 40, sy, 32, 32), GUIContent("","Set iso-view"), "iso")){
onGUI_SetIsoViewCamera();
}
GUI.Label(Rect(sx + 40, sy+30, 32, 32),GUI.tooltip,"tooltip");
};
//Function which design the GUI interface
function OnGUI() {
GUI.skin = i_skin;
if(b_showGUI)
buildGUI();
}
//Sets the camera in Isometric View.
function onGUI_SetIsoViewCamera() {
var gg = GameObject.Find("i_SwitchCameras");
if(gg)
gg.GetComponent("i_SwitchCameras_Scripts").switchIso2Perspective();
return;
}
The line Numbers make no sense at all, is this the full script? And why does it call something with Boo?
I would for testing purposes write something like this:
function onGUI_SetIsoViewCamera()
{
var gg = GameObject.Find("i_SwitchCameras");
print(gg ? "Found i_SwitchCameras" : "i_SwitchCameras not found");
if(gg)
{
var component = gg.GetComponent("i_SwitchCameras_Scripts");
print(component ? "Found i_SwitchCameras_Scripts" : "i_SwitchCameras_Scripts not found");
if (component)
{
component.switchIso2Perspective();
}
}
}
var i_MainGUIcamera: Transform;
var i_skin : GUISkin;
private var b_showGUI; //Boolean for Enabling/Disabling the GUI
function Start() {
b_showGUI = true;
}
function Update () {
}
function buildGUI(){
GUI.skin = i_skin;
var sx: int = 10;
var sy: int = 25;
GUI.tooltip = "";
if (GUI.Button(Rect(sx,sy,32, 32),GUIContent("","Clean Scene"), "New")) {
}
GUI.Label(Rect(sx,sy+30,50,50), GUI.tooltip,"tooltip");
GUI.tooltip = "";
if (GUI.Button( Rect(sx + 40, sy, 32, 32), GUIContent("","Set iso-view"), "iso")){
onGUI_SetIsoViewCamera();
}
GUI.Label(Rect(sx + 40, sy+30, 32, 32),GUI.tooltip,"tooltip");
};
//Function which design the GUI interface
function OnGUI() {
GUI.skin = i_skin;
if(b_showGUI)
buildGUI();
}
//Sets the camera in Isometric View.
function onGUI_SetIsoViewCamera() {
var gg = GameObject.Find("i_SwitchCameras");
if(gg)
gg.GetComponent("i_SwitchCameras_Scripts").switchIso2Perspective();
return;
}
I have the same problem in this script today where I press F1 and I want to switch from one camera to another changing the value of .enabled.
In this cases gg is a First Person Player… and isoCamera is the orthographic isometric camera. Again, I get the same message for the following statement:shock:
isoCamera.GetComponent("i_CameraControls").enabled = !isoCamera.GetComponent("i_CameraControls").enabled;
var isoCamera : Camera;
function Awake() {
isoCamera.enabled = true;
var gg = GameObject.Find("Player");
if (gg){
gg.GetComponent("FPSInputController").enabled = false;
gg.GetComponent("CharacterMotor").enabled=false;
}
}
function Update () {
}
function switchIso2Perspective() {
var gg = GameObject.Find("Player");
isoCamera.enabled = !isoCamera.enabled;
isoCamera.GetComponent("i_CameraControls").enabled = !isoCamera.GetComponent("i_CameraControls").enabled;
isoCamera.GetComponent("DragRigidBodyShadow").enabled = !isoCamera.GetComponent("DragRigidBodyShadow").enabled;
if (isoCamera.enabled == false) {
isoCamera.GetComponent("i_CameraControls").SetStatus("perspective");
} else
isoCamera.GetComponent("i_CameraControls").SetStatus("isometric");
gg.GetComponent("FPSInputController").enabled = !gg.GetComponent("FPSInputController").enabled;
gg.GetComponent("CharacterMotor").enabled = !gg.GetComponent("CharacterMotor").enabled;
}
function OnGUI(){
var e : Event = Event.current;
if(e.isKey) {
if( (e.keyCode == KeyCode.F1) (e.type == EventType.KeyUp)) {
switchIso2Perspective();
}
}
Could you also try what I wrote and show me the i_SwitchCameras_Scripts.js?
yes, it was successful! it could find the object named that way. can’t understand…
for the second case it’s weird because I haven’t changed the code at all, and yesterday I wasn’t getting that error.
Did you add “enabled” as a variable into your i_CameraControls script?
nope ther is no variable called like that. It’s part of the “Component” stuff… that what I knew.
For the second case I’ve found the mistake and I misspelled a key word. but still working on the first case
this is weird for the first case the
var component = gg.GetComponent("i_SwitchCameras_Scripts");
print(component ? "Found i_SwitchCameras_Scripts" : "i_SwitchCameras_Scripts not found");
print “NOT FOUND” :(( but the script is attached to the object!