Errata for Apple Augmented Reality by Tutorials 1st Edition

šŸ“š Official Books Apple Augmented Reality by Tutorials
10

Hello.
I have a question. How can I select multiple objects in Reality Composer when they are one on top of the other.
(Chapter 7, Adding button interactions)

11

Hi there, it should be 0.24cm. Thanks for reporting the issue.

12

Hi there, this is a bit of an issue at the moment when working in Reality Composer, mainly because thereā€™s no Scene Object Hierarchy available. To best work around I can suggest is to select the first image, then write down itā€™s Transform details. Now move it out of the way to expose the next image. Select the next image, write down Transform details for that one, before moving it out of the way. This allows you to get to the other images hidden below. Once youā€™ve made all your changes, just restore the Transform settings for the images you had to move out of the way.

Hope that helps.

13

Ok, I will try.
Thank you.

14

Version 0.3.0, page 261 has a typo. It says

Add the following to sessiongWasInterrupted(_:):

There is an extra ā€˜gā€™ in the method name.

15 
1. AR Quick Start

tankAnchor!.turret?.setParent(tankAnchor!.tank, preservingWorldTransform: true)
should be
tankAnchor?.cannon?.setParent(tankAnchor?.tank, preservingWorldTransform: true)

otherwise ā€œValue of type ā€˜TinyToyTank._TinyToyTankā€™ has no member ā€˜turretā€™ā€ error thrown

1 Like
16

chapter 16: updating the focus node
ā€œā€¦ the app will switch to PointToSurfaceā€¦ā€
It should say PointAtSurface which is defined in the appState enum.

17

chapter 16: Creating the scene
ā€œWith the Base node selectedā€¦ā€
It is misleading because when you select the Base node under Base reference, the transform position is uneditable. It should say ā€œBase reference selectedā€?

18

chapter 16: creating the scene
The base referenceā€™s position should be (x:0, y:0.049, z:0) instead of (x:0, y:0.49, z:0)

19

Error in 2. AR Quick Look - Error typos

20

Iā€™m probably running into an embarrassing newbie problem but on page 20 the line
var tankAnchor: TinyToyTank._TinyToyTank? creates a build error for me. I tried to run the final code as well but same error. Iā€™m on Xcode 11.7 and Catalina (10.15.7). Any ideas? Many thanksā€¦

1 Like
21
22

Hi @zig-zag , could you possibly share the exact error you receive when running the code and what solutions you were able to try?

Best,
Gina

23

Final Update: I ran the app on my iPhone XR and can see the cube and number 15 pool ball in full 3D, along with the table top they are sitting on as viewed through my iPhoneā€™s camera. The error messages appear to be related to audio, which is not being used at this time.

Iā€™m running OS 11.2.2 on a 2017 MacBook Pro and using XCode 12.4 (12D4e). I set up the TinyToyTank Project (several times and got the same results each time) following the instructions. Build Succeeded, but I get only a tiny gray square each time (is this the block Iā€™m supposed to see?) I thought Iā€™d see a 3D image of a block. Below is the debug information I get from Xcode. I have no idea what to make of it. I did verify using Reality Composer that the 3D cube with smoothed edges is in the Experience.rcproject file. But for some reason it was not loaded. OK, an update. Apparently the block was loaded and Iā€™m seeing it from a top-down view, so it appears as a small gray square. How do I know this? I added a 15 pool ball to the cube image in the Experience.rcproject file and built the app again. This time I see the small gray square and the 15 pool ball, so itā€™s there. Now to figure out how to move the image around in the emulator. Next will plug in my iPhone.

2021-03-30 07:46:34.413838-0500 TinyToyTank[27132:9036281] Metal GPU Frame Capture Enabled
2021-03-30 07:46:34.414287-0500 TinyToyTank[27132:9036281] Metal API Validation Enabled
2021-03-30 07:46:35.191245-0500 TinyToyTank[27132:9036281] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x600000e29ca0> F8BB1C28-BAE8-11D6-9C31-00039315CD46
2021-03-30 07:46:35.221543-0500 TinyToyTank[27132:9036281] Error loading /Library/Audio/Plug-Ins/HAL/JackRouter.plugin/Contents/MacOS/JackRouter: dlopen(/Library/Audio/Plug-Ins/HAL/JackRouter.plugin/Contents/MacOS/JackRouter, 262): no suitable image found. Did find:
/Library/Audio/Plug-Ins/HAL/JackRouter.plugin/Contents/MacOS/JackRouter: mach-o, but not built for platform iOS-sim
2021-03-30 07:46:35.221689-0500 TinyToyTank[27132:9036281] [plugin] Cannot find function pointer New_JackRouterPlugIn for factory <CFUUID 0x600000e29d60> 7CB18864-927D-48B5-904C-CCFBCFBC7ADD in CFBundle/CFPlugIn 0x7fa473508f60 </Library/Audio/Plug-Ins/HAL/JackRouter.plugin> (bundle, not loaded)
2021-03-30 07:46:35.227170-0500 TinyToyTank[27132:9036281] [] [07:46:35.226] FigSTSCreate signalled err=-15994 (kFigSTSError_UnknownFlavor) (Unknown STS flavor) at /Library/Caches/com.apple.xbs/Sources/EmbeddedCoreMedia_Sim/EmbeddedCoreMedia-2765.6/Prototypes/FigSTS/FigSTS_Common.c:157
2021-03-30 07:46:35.227337-0500 TinyToyTank[27132:9036281] [Audio] Failed to create FigSTS object error=-15994
no main.reality file found in application bundle

24

Hey, Chris - will there be an update to the book?

25

Hi there! Yes, there is an update currently in the works.

26

Hi Chris! Any idea when the update for Apple Augmented Reality by Tutorials will be available?

27

Hey,

Just a FYI as Iā€™m closing this thread ā€” the new edition will be available from tomorrow, Wednesday 23rd Feb.