Marker is misaligned with camera image

[jorgecardoso]

Do you want to request a feature or report a bug?
Bug

What is the current behavior?
With versions 3.1.0+, the barcode markers are misaligned with the camera image.

If the current behavior is a bug, please provide the steps to reproduce.

The following demo shows two versions of the same scene, the only change is the AR.js version (3.0.2, and 3.1.0).
The error occurs with all versions above or equal to 3.1.0: the superimposed 3D object is not perfectly aligned with the marker image.

The demo uses a video source, but the issue also happens with the camera image:

https://ar-js-misalignment.glitch.me/

https://glitch.com/edit/#!/ar-js-misalignment

Please mention other relevant information such as the browser version, Operating System and Device Name
Tried on Windows desktop, Chrome and Firefox.

Also verified on Mobile Chrome.

What is the expected behavior?
The superimposed 3D objects should be aligned with the marker image on the camera, as happens with version 3.0.2.

If this is a feature request, what is motivation or use case for changing the behavior?

[jorgecardoso]

Just found the other issues which may be related: #76 and #242

[kalwalt]

Hi @jorgecardoso if you are using different version of Ar.js you will have different behaviours. Before that PR #60 was merged you need to move the model onto the z axis, with the merged changes you need to move the model onto the y axis as was in the old repository (by jerometeienne). Hope that helps.

[jorgecardoso]

Hi @jorgecardoso if you are using different version of Ar.js you will have different behaviours. Before that PR #60 was merged you need to move the model onto the z axis, with the merged changes you need to move the model onto the y axis as was in the old repository (by jerometeienne). Hope that helps.

Thank you! I must have missed that info in the documentation.
It helped.