Index out of Range When Trying to Play Legacy Animation from Loop

Unity Engine
1

Hey! So long story short I’m generating some UI buttons based on the legacy animations assigned to an object. I’m using Piglet to load these gltf models at runtime (fantastic Asset!), but whenever I click on one of the generated buttons, I get the error below:

Error Message

ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
System.ThrowHelper.ThrowArgumentOutOfRangeException (System.ExceptionArgument argument, System.ExceptionResource resource) (at <9577ac7a62ef43179789031239ba8798>:0)
System.ThrowHelper.ThrowArgumentOutOfRangeException () (at <9577ac7a62ef43179789031239ba8798>:0)
System.Collections.Generic.List`1[T].get_Item (System.Int32 index) (at <9577ac7a62ef43179789031239ba8798>:0)
RiggedObjectProperties+<>c__DisplayClass8_0.<AssignReferences>b__0 () (at Assets/Scripts/Object Properties/RiggedObjectProperties.cs:45)
UnityEngine.Events.InvokableCall.Invoke () (at <0847a0faf94444ccbaf1958021b27f54>:0)
UnityEngine.Events.UnityEvent.Invoke () (at <0847a0faf94444ccbaf1958021b27f54>:0)
UnityEngine.UI.Button.Press () (at C:/Program Files/Unity/Hub/Editor/2019.4.17f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/UI/Core/Button.cs:68)
UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at C:/Program Files/Unity/Hub/Editor/2019.4.17f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/UI/Core/Button.cs:110)
UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/Program Files/Unity/Hub/Editor/2019.4.17f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:50)
UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at C:/Program Files/Unity/Hub/Editor/2019.4.17f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:261)
UnityEngine.EventSystems.ExecuteEvents:Execute(GameObject, BaseEventData, EventFunction`1)
VRInputModule:processRelease(PointerEventData) (at Assets/Scripts/UIControllers/VRInputModule.cs:115)
VRInputModule:Process() (at Assets/Scripts/UIControllers/VRInputModule.cs:73)
UnityEngine.EventSystems.EventSystem:Update() (at C:/Program Files/Unity/Hub/Editor/2019.4.17f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/EventSystem.cs:377)

[ICODE][/ICODE]

My code for doing this is here:
Because of the way the Piglet Asset loads in the animations, I’m getting the animation names through an “AnimationList” component, then passing those strings into the Unity Animation component to play them.

Code

void generateButtons()
        {
            animationlist = objectManager.selectedObject.GetComponent<AnimationList>();
            animationComponent = objectManager.selectedObject.GetComponent<Animation>();
            animationComponent.playAutomatically = true;
            animationComponent.Play();

            for (int i = 0; i < animationlist.Clips.Count; i++)
            {
                Button animationButton = Instantiate(animationSelectionButton, Vector3.zero, Quaternion.Euler(0, 0, 0));
                animationButton.GetComponentInChildren<TextMeshProUGUI>().text = animationlist.Clips[i].name;
// IM GETTING THE ERROR ON THE BELOW LINE.  BUT I HAVE NO IDEA WHAT IT CAN BE :)
                animationButton.onClick.AddListener(delegate { playAnimation(animationlist.Clips[i].name); }); // METHOD BELOW.
                animationButton.gameObject.SetActive(true);
            }
        }


// Then this is what I'm trying to assign to each button:
    void playAnimation(string animationName)
    {
        Debug.Log("Playing " + animationName + " on object: " + objectManager.selectedObject.name);
        animationComponent.Play(animationName);
    }

I hope that makes sense! Thanks so much!

2

Here are some notes on IndexOutOfRangeException and ArgumentOutOfRangeException:

http://plbm.com/?p=236

3

I’ll take a look at this, thanks! Looks like a great resource! :slight_smile:

1 Like
4

Biggest deal is to find what is out of range, and hopefully it is within your control. If it is in the Piglet thing you mention, it might be trickier to reason about what is going wrong, but I am not familiar with Piglet.