ARKit | Place virtual objects using ARKit | Augmented Reality library

I'm working with ARKit / SceneKit and I'm trying to have an arrow point to an arbitrary position I set in the world, but I'm having a bit of trouble. In my sceneView I have a scene set up to load in my arrow.

I am writing an ARKit app where I need to use camera poses and intrinsics for 3D reconstruction.

The camera Intrinsics matrix returned by ARKit seems to be using a different image resolution than mobile screen resolution. Below is one example of this issue

Intrinsics matrix returned by ARKit is :

[[1569.249512, 0, 931.3638306],[0, 1569.249512, 723.3305664],[0, 0, 1]]

whereas input image resolution is 750 (width) x 1182 (height). In this case, the principal point seems to be out of the image which cannot be possible. It should ideally be close to the image center. So above intrinsic matrix might be using image resolution of 1920 (width) x 1440 (height) returned that is completely different than the original image resolution.

The questions are:

• Whether the returned camera intrinsics belong to 1920x1440 image resolution?
• If yes, how can I get the intrinsics matrix representing original image resolution i.e. 750x1182?

I have this function named addShapes. I want it to create 3 shapes

I'm new in Swift and ARKit. For some reason the SCNNode node I'm trying to display is not showing up. I'm working with SwiftUI. I defined in the next code block the function addNode that should render the node.

I am new to AR and using Unity, ARFoundation, and ARKit.

Will my ARWorldMaps have persistence in an outdoor or indoor experience and will it be as effective as Azure? I will only be deploying on iOS so cross-platform is not important.

I'm using QLPreviewController to show AR content. With the newer iPhones with LIDAR it seems that object occlusion is enabled by default.

Is there any way to disable object occlusion in the QLVideoController without having to build a custom ARKit view controller? Since my models are quite large (life-size buildings), they seem to disappear or get cut off at the end.

I want to tile the ground with ARKit using custom polygon that creates using selected positions on horizontal plan by user, but tiles are stretched and wont show properly, Maybe problem is from texture coordinates, What's wrong with this code?

I have this code that gets X, Y, Z positions from each frame in ARKit.

I have an ARKit app that does the following:

• Render the frame's captured image to a texture.
• Apply this texture to a scenekit object in the AR scene.

I use this to create a virtual object that perfectly blends into the AR scene.

My current approach works great for well-lit scenes, but in dark scenes the texture on the virtual object becomes subtly different than the current scene background. What causes this and is there any way to fix it?

I've created this branch on a demo project which demonstrates the issue.

The project renders a face model that is textured with the frame's currentImage. The result should be that face model effectively becomes invisible, even though it is still being rendered. However in low light situations, you can clearly see where the background image ends and the face model starts.

Here's an overview of the shader I use to capture the texture