Index was outside the bounds of the array in MeshGenerator

taehun24

Hello.
Intermittent? But Spine.Unity.MeshGenerator.BuildMeshWithArrays has frequently encountered problems.
I didn't change the data separately during runtime, SkeletonData in SkeletonGraphic
Only Managing SetActive

Exception is occurring in the call stack below when Canvas is updated.
IndexOutOfRangeException: Index was outside the bounds of the array. Spine.Unity.MeshGenerator.BuildMeshWithArrays (Spine.Unity.SkeletonRendererInstruction instruction, System.Boolean updateTriangles) (at Assets/Spine/Runtime/spine-unity/Mesh Generation/MeshGenerator.cs:922) Spine.Unity.SkeletonGraphic.UpdateMeshSingleCanvasRenderer (Spine.Unity.SkeletonRendererInstruction currentInstructions) (at Assets/Spine/Runtime/spine-unity/Components/SkeletonGraphic.cs:731) Spine.Unity.SkeletonGraphic.UpdateMeshToInstructions () (at Assets/Spine/Runtime/spine-unity/Components/SkeletonGraphic.cs:688) Spine.Unity.SkeletonGraphic.Rebuild (UnityEngine.UI.CanvasUpdate update) (at Assets/Spine/Runtime/spine-unity/Components/SkeletonGraphic.cs:286) UnityEngine.UI.CanvasUpdateRegistry.PerformUpdate () (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/UI/Core/CanvasUpdateRegistry.cs:215) UnityEngine.UI.LoopScrollRectBase:LateUpdate() (at ***)

The update to the latest version, 4.1.12, is occurring the same.

It's happening the same as what someone else wrote.
https://esotericsoftware.com/forum/d/24056-index-was-outside-the-bounds-of-the-array-in-meshgenerator

Using Unity Version : 2022.2.17
Spine : 4.1.12

We don't have much time. Please help me quickly.

Harald

taehun24 We don't have much time. Please help me quickly.

Very sorry to hear you're encountering problems! We would be happy to help as quickly as possible, but we would require a minimal Unity project which still shows the problem. You can send it as a zip package to contact@esotericsoftware.com, briefly mentioning this forum thread URL. Then we can help as efficiently as possible.

Otherwise I'm afraid it will take much longer (if possible at all), and since you mentioned that you "frequently encountered problems", I hope that you can more easily create such a reproduction project than the user on the other thread, where unfortunately we never received one.

taehun24

Harald
I'm sorry that I can't share a similar project due to security issues.
It could only be confirmed that Exception was occurring when Skeleton Graphic, which had no problem, was rebuilt from LateUpdate.
Please check BuildMeshWithArray.

for (int iii = 0; iii < meshVertexCount; iii += 2) {
	float x = tempVerts[iii], y = tempVerts[iii + 1];
	vbi[vertexIndex].x = x; vbi[vertexIndex].y = y; vbi[vertexIndex].z = z;
	cbi[vertexIndex] = color; ubi[vertexIndex].x = attachmentUVs[iii]; ubi[vertexIndex].y = attachmentUVs[iii + 1];

	if (x < bmin.x) bmin.x = x;
	else if (x > bmax.x) bmax.x = x;

	if (y < bmin.y) bmin.y = y;
	else if (y > bmax.y) bmax.y = y;

	vertexIndex++;
}

An index error is occurring in that code.

Harald

taehun24 It could only be confirmed that Exception was occurring when Skeleton Graphic, which had no problem, was rebuilt from LateUpdate.

Unfortunately all the info that you have provided in your last posting was already contained in the stack trace of your first posting, so we know that already. It would be necessary for us to either receive a reproduction project, or get detailed steps on how to reproduce the issue.

taehun24 I'm sorry that I can't share a similar project due to security issues.

Please note that you can replace any atlas textures of your skeletons with a blank black image, if that's your copyright concerns. Apart from that, we of course will treat any files received at contact@esotericsoftware.com confidentially. Just mentioning, in case this helps that you could under these circumstances create a reproduction project.

If you still can't provide a reproduction project, it's highly important that you describe in as much detail as possible what all your code related to the SkeletonGraphic object is doing. And we would need the problematic skeleton assets (ones with which the problem can be reproduced) in order to be able to reproduce the problem. If the problem can be reproduced with one of the skeletons provided in the Spine Examples, that would be even better.

wedat

@taehun24 did you solve the problem,

but the problem is only occurs in mobile device, in editor we don't get the exception

we have similar exception and we don't know why 🙁

thank you

wedat

In our case we solved the problem like this,
We set the "Starting Animation" value to <None> in the skeletonGraphic object in the scene, and then set the animation in Onenable via the script (in our case, since we wanted to wait for the animation for a while at the begining, we set the timeScale "0" at first and then "1" after a while).

Harald

@wedat Sorry for the late reply, I just came back from vacation. Thanks for sharing insights of your workaround. We will have a look at what the issue might be based on your given solution.