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AR building blocks

I have been working on AR apps since Y2021. This repo is for sorting out AR building blocks that I have developed in those AR apps.

Requirements:

  • Unity
  • ARFoundation and ARKit/ARCore

Building blocks

EDM (LiDAR-based)

Note: this building block requires iPhone/iPad equipped with LiDAR.

EDM (Electronic Distance Measurement) in the surveying terminology is useful for AR applications as well.

Last year I saw this AR device "SiteVision" at a trade show in Tokyo. The device is also equipped with Lazer-based EDM.

iPad Pro and iPhone 12 Pro are equipped with LiDAR. I have found that EDM based on the LiDAR is very useful when I am placing an AR anchor on a wall.

=> code

EDM (PointCloud-based)

Most of smartphone models in the market are not equipped with LiDAR. We use point cloud for distance measurement instead of LiDAR.

=> code

World origin visualization

This app is just to visualize the origin on the world coordinates.

=> code

QR code reader

This app uses ARCameraBackground for recognizing a QR code with ZXing library.

=> code

Rendering IFC BIM in AR app (URP)

This is to explane how IFC-format BIM can be rendered in my original AR app.

I downloaded "FZK Haus" and "Azuma House" from the following BIM archive: http://openifcmodel.cs.auckland.ac.nz

Then I modified the original BIM with Blender (with BlenderBIM add-on) for my AR app:

  • modified some parts to make them look better
  • added CC0Texture to some faces
  • added a piano chair
  • etc

=> Demo video on YouTube

=> code

Dancing Mixamo characters

This is a typical AR app, but it uses the EDM feature above for placing an object at a specific location.

=> code

Multiple AR markers (URP)

This app supports multiple AR markers.

=> code

VR Theater (URP)

This app is to display 240-degree 16K panorama pictures taken with iPhone SE Camera App. iPad mini is the best device to enjoy the high-resolution panorama pictures with this AR/VR app. Just save you panorama pictures in the folder "Resources/Panorama" and make the settings below before starting the app.

I created the following shader graph for displaying a panorama picture (Texture2D) on the 240-degree screen.

And the screenshots of this AR app on my iPad mini.

=> code

Note: I have disabled the "Auto Focus" option in Camera Manager to stabilize the screen.

Converting PDF into transparent PNG inverting black and white

This Python3 script is to convert a PDF document into a transparent PNG image for AR applications:

$ PDF_converter_for_AR.py -i floorplan_sample.pdf