3D model with Image tracking is scaled 1D

[alessiograncini]

Once I inserted in the ImgeInfoprefab a simple cube on the image, the cube is scaled 1D toward Y-direction. How to avoid this ? Did This happen to you ? thanks

[alessiograncini]

I ended up fixing it this way trackedImage.transform.localScale = new Vector3(trackedImage.size.x, 0.3f, trackedImage.size.y);

that 0.3 was 1 before. If there is a better ad more official fix, please go for it. Thank you.

[LucasRizzotto]

This really needs a fix.

[ElliotMebane]

I was seeing the Y-axis stretching and ultimately solved it, though I'm not sure if it was a configuration/package setting or simply setting uniform Vector3s for the scaling.

In OnTrackedImagesChanged I set a uniform Vector3 for the trackedIMage scale: trackedImage.transform.localScale = new Vector3(0.01f, 0.01f, 0.01f);

In UpdateInfo I also use a uniform Vector3 for the scale: trackedImage.transform.localScale = new Vector3(0.1f, 0.1f, 0.1f);

My cube is at the first level of the hierarchy in the ImageInfo prefab (sibling with PlaneParent and Canvas).

Configuration:

Mac, OS 10.14.5

Unity 2019.3.0a5 ARKit XR Plugin preview.5 - 2.1.0 (abandoned version: preview.1 - 2.2.0 due to Xcode build errors mentioned in forum post below) ARFoundation from GitHub branch 2.1 (2019.07.04 downloaded), shows up as preview.3 - 2.1.0 in Package Manager. I also updated it to preview. 2 2.0 within Package Manager to try it and it works too. https://github.com/Unity-Technologies/arfoundation-samples/tree/2.1

Build Settings: Run in Xcode as Release Requires ARKit support not checked Target Min. iOS Version 11 (default) Quality Medium (iOS default)

iPad Pro 9.7 inch OS 12.3.1

Build Error (resolved): ARKit XR Plugin 2.2.0-preview.1 will only work with Xcode 11 and iOS 13. https://forum.unity.com/threads/error-when-building-samplescene-from-arfoundation-to-iphone-6s.545338/

(Filename: currently not available on il2cpp Line: -1)

UnityException: Transform child out of bounds at TrackedImageInfoManager.UpdateInfo (UnityEngine.XR.ARFoundation.ARTrackedImage trackedImage) [0x00000] in <00000000000000000000000000000000>:0 at TrackedImageInfoManager.OnTrackedImagesChanged (UnityEngine.XR.ARFoundation.ARTrackedImagesChangedEventArgs eventArgs) [0x00000] in <00000000000000000000000000000000>:0 at System.Action1[T].Invoke (T obj) [0x00000] in <00000000000000000000000000000000>:0 at UnityEngine.XR.ARFoundation.ARTrackedImageManager.OnTrackablesChanged (System.Collections.Generic.List1[T] added, System.Collections.Generic.List1[T] updated, System.Collections.Generic.List1[T] removed) [0x00000] in <00000000000000000000000000000000>:0 at UnityEngine.XR.ARFoundation.ARTrackableManager`4[TSubsystem,TSubsystemDescriptor,TSessionRelativeData,TTrackable].Update () [0x00000] in <00000000000000000000000000000000>:0

[HawkenKing]

what is the correct way to make a 3d model follow a marker? I also encountered the scale issue

[alessiograncini]

Thanks for the reply @ElliotMebane . I will look into that. @HawkenKing the correct way it's swapping the prefab spot [I guess] getting its transform and relative scale with the image. I suggest to make a new script that has an array or list of game objects that any x action swap the original prefab keeping scale and position inheriting some parameters from the trackerimageinfo script. If I will develop more with that, will be posting.

[spvn]

Why was this closed? There's still no resolution to it? My 3D prefabs are still getting scaled in Y direction when they're spawned

[spvn]

Ok for anyone encountering this, if you're using the ARFoundation samples for your own 3D model, take note that the TrackedImageInfoManager sets the scale of your object in OnTrackedImagesChanged.

[JShull]

@spvn thank you for this comment... For the life of me could not figure out why my object was being scaled down.

[spvn]

@JShull goodness I don't even remember working with ARFoundation 1 year ago. glad to have helped and good luck with ARFoundation lol.