Add iOS SwiftUI emulator for TWSU DIY Gamer Kit by Copilot · Pull Request #77 · 28pins/TWSUGamerPlus

Copilot · 2026-03-08T02:48:04Z

Fix SimonGame: guard simonStep >= maxSeq before sequence[simonStep] access — treats completing all 30 steps as an ultimate win (saves high score, plays win tune, resets) instead of crashing
Add AccentColor.colorset to Assets.xcassets — resolves asset catalog build failure caused by ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor referencing a missing color set

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Co-authored-by: 28pins <262898015+28pins@users.noreply.github.com>

Copilot

Pull request overview

Adds a new iOS/iPadOS SwiftUI-based emulator for the TWSU DIY Gamer Kit, including a hardware abstraction layer and ports of the nine built-in games, all under ios/GamerEmulator/.

Changes:

Introduces SwiftUI app shell (launcher + views) and an @MainActor GamerHardware emulation layer (display/input/LED flash/sound/timing).
Ports nine games to Swift async game loops using await gamer.delay(...).
Adds Xcode project, assets catalog, and iOS-specific persistence (UserDefaults high scores).

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
ios/README.md	Documents emulator features, build requirements, architecture, and controls.
ios/GamerEmulator/GamerEmulator/ContentView.swift	SwiftUI app root that hosts the emulator UI.
ios/GamerEmulator/GamerEmulator/GamerEmulatorApp.swift	App entry point + first-launch high-score initialization.
ios/GamerEmulator/GamerEmulator/Info.plist	iOS app metadata and device/orientation configuration.
ios/GamerEmulator/GamerEmulator/Assets.xcassets/Contents.json	Asset catalog root metadata.
ios/GamerEmulator/GamerEmulator/Assets.xcassets/AppIcon.appiconset/Contents.json	App icon set metadata.
ios/GamerEmulator/GamerEmulator.xcodeproj/project.pbxproj	Xcode project configuration and build settings.
ios/GamerEmulator/GamerEmulator/GameAssets/GameAssets.swift	Ports bitmap frames, digit glyphs, and melody constants to Swift.
ios/GamerEmulator/GamerEmulator/Hardware/GamerHardware.swift	Observable hardware emulation (display/input/LED flash/sound/timing helpers).
ios/GamerEmulator/GamerEmulator/Hardware/SoundEngine.swift	AVAudioEngine-based tone generator matching OCR2A-derived pitch model.
ios/GamerEmulator/GamerEmulator/Persistence/HighScoreStore.swift	UserDefaults-backed per-game high-score storage.
ios/GamerEmulator/GamerEmulator/Launcher/Launcher.swift	Main launcher state machine + async tick loop + game task management.
ios/GamerEmulator/GamerEmulator/Games/GameProtocol.swift	Defines the shared `Game` protocol used by all ports.
ios/GamerEmulator/GamerEmulator/Games/SnakeGame.swift	Snake game port using async delay-based loop.
ios/GamerEmulator/GamerEmulator/Games/BreakoutGame.swift	Breakout game port including physics and block propagation logic.
ios/GamerEmulator/GamerEmulator/Games/SimonGame.swift	Simon game port with async playback/input waiting.
ios/GamerEmulator/GamerEmulator/Games/FlappyGame.swift	Flappy game port with menu/game state and tick-based difficulty.
ios/GamerEmulator/GamerEmulator/Games/TetrisGame.swift	Tetris port including rotation, line-clear animation, and melody playback.
ios/GamerEmulator/GamerEmulator/Games/AlienGame.swift	Alien game port including shoot animation and falling rows.
ios/GamerEmulator/GamerEmulator/Games/ConwayGame.swift	Conway’s Game of Life port + small-step preview support.
ios/GamerEmulator/GamerEmulator/Games/DinoGame.swift	Dino runner port with obstacle types and jump/duck physics.
ios/GamerEmulator/GamerEmulator/Games/BrightnessGame.swift	Brightness/settings screen port using gamer brightness/compensation flags.
ios/GamerEmulator/GamerEmulator/Views/ButtonsView.swift	On-screen controls (D-pad, hardware buttons, cap-touch sound toggle).
ios/GamerEmulator/GamerEmulator/Views/MatrixDisplayView.swift	SwiftUI renderer for the 8×8 LED matrix with brightness scaling.
ios/GamerEmulator/GamerEmulator/Views/GamerView.swift	Composed emulator UI (status bar + matrix + controls).

Copilot · 2026-03-08T19:10:14Z

+        // Add a new item to the sequence
+        sequence[simonStep] = Int.random(in: 0..<Self.numDirs)
+


sequence[simonStep] = ... will go out of bounds once simonStep reaches 30 (the array has 30 elements, indices 0–29). Since simonStep is incremented on success without a cap, the emulator can crash late-game. Clamp simonStep to maxSeq - 1 before indexing/incrementing (or end the game / treat completion as win when simonStep == maxSeq - 1).

@copilot apply changes based on this feedback

Fixed in 5231605. Added a guard at the top of loop() that fires when simonStep >= maxSeq (i.e. the player completed all 30 steps): saves the high score, plays the win tune, shows the checkmark, then resets — no array access occurs. This covers the crash path where the success branch incremented simonStep to 30 between loop iterations.

Copilot · 2026-03-08T19:10:15Z

+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_STYLE = Automatic;


The project build settings specify ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor, but Assets.xcassets in this PR does not include an AccentColor.colorset. This can cause asset catalog build failures or missing accent color at runtime. Either add an AccentColor color set to the asset catalog, or remove the build setting so the app uses the default SwiftUI accent.

@copilot apply changes based on this feedback

Fixed in 38c2f32. Added AccentColor.colorset/Contents.json to Assets.xcassets (universal, no custom color — uses the system default accent). The ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor build setting now resolves correctly and won't cause asset catalog build failures.

Copilot · 2026-03-08T19:10:15Z

+                    if gamer.display[newX][ballY - velY] == 0 {
+                        blocks[newX][ballY + velY] = 0
+                        velY *= -1
+                    } else {
+                        blocks[ballX + velX][ballY + velY] = 0
+                        velY *= -1; velX *= -1
+                    }
+                }
+            } else {
+                if gamer.display[ballX - velX][newY] == 0 {
+                    blocks[ballX + velX][newY] = 0
+                    velX *= -1
+                    if !(newY > -1 && newY < 8) {
+                        if gamer.display[ballX + velX][ballY - velY] == 0 {
+                            blocks[ballX - velX][ballY - velY] = 0


newY is already known to be out of bounds in this branch, but the code writes blocks[newX][ballY + velY] / blocks[ballX + velX][ballY + velY]. In Swift this will crash when ballY + velY is -1 or 8 (same condition that made newY out of bounds). Add bounds checks (only write when both indices are 0..<8) or restructure the collision handling to avoid out-of-range indexing.

Suggested change

if gamer.display[newX][ballY - velY] == 0 {

blocks[newX][ballY + velY] = 0

velY *= -1

} else {

blocks[ballX + velX][ballY + velY] = 0

velY *= -1; velX *= -1

}

}

} else {

if gamer.display[ballX - velX][newY] == 0 {

blocks[ballX + velX][newY] = 0

velX *= -1

if !(newY > -1 && newY < 8) {

if gamer.display[ballX + velX][ballY - velY] == 0 {

blocks[ballX - velX][ballY - velY] = 0

let checkY = ballY - velY

if checkY >= 0 && checkY < 8 && gamer.display[newX][checkY] == 0 {

let targetY = ballY + velY

if targetY >= 0 && targetY < 8 {

blocks[newX][targetY] = 0

}

velY *= -1

} else {

let targetX = ballX + velX

let targetY = ballY + velY

if targetX >= 0 && targetX < 8 && targetY >= 0 && targetY < 8 {

blocks[targetX][targetY] = 0

}

velY *= -1; velX *= -1

}

}

} else {

let checkX = ballX - velX

if checkX >= 0 && checkX < 8 && newY >= 0 && newY < 8 && gamer.display[checkX][newY] == 0 {

let targetX = ballX + velX

if targetX >= 0 && targetX < 8 {

blocks[targetX][newY] = 0

}

velX *= -1

if !(newY > -1 && newY < 8) {

let dispX = ballX + velX

let dispY = ballY - velY

let blockX = ballX - velX

let blockY = ballY - velY

if dispX >= 0 && dispX < 8 && dispY >= 0 && dispY < 8 &&

blockX >= 0 && blockX < 8 && blockY >= 0 && blockY < 8 &&

gamer.display[dispX][dispY] == 0 {

blocks[blockX][blockY] = 0

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Co-authored-by: 28pins <262898015+28pins@users.noreply.github.com>

…log build Co-authored-by: 28pins <262898015+28pins@users.noreply.github.com>

Initial plan

489ca3f

Copilot AI assigned Copilot and 28pins Mar 8, 2026

Copilot started work on behalf of 28pins March 8, 2026 02:48 View session

Add iOS SwiftUI emulator for TWSU DIY Gamer Kit hardware and all 9 games

a90a417

Co-authored-by: 28pins <262898015+28pins@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Add iOS translation of gamer hardware emulator~~ Add iOS SwiftUI emulator for TWSU DIY Gamer Kit Mar 8, 2026

Copilot finished work on behalf of 28pins March 8, 2026 03:15

28pins marked this pull request as ready for review March 8, 2026 19:04

Copilot AI review requested due to automatic review settings March 8, 2026 19:04

Copilot started reviewing on behalf of 28pins March 8, 2026 19:04 View session

Copilot AI reviewed Mar 8, 2026

View reviewed changes

28pins and others added 4 commits March 8, 2026 17:49

Update BreakoutGame.swift

2f5651f

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Update DinoGame.swift

7b45aa5

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Update BrightnessGame.swift

6fb2afb

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Update Info.plist

a4b341a

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Copilot started work on behalf of 28pins March 9, 2026 13:56 View session

Fix SimonGame sequence out-of-bounds crash when simonStep reaches maxSeq

5231605

Co-authored-by: 28pins <262898015+28pins@users.noreply.github.com>

Copilot finished work on behalf of 28pins March 9, 2026 14:00

Copilot started work on behalf of 28pins March 9, 2026 14:00 View session

Add missing AccentColor.colorset to Assets.xcassets to fix asset cata…

38c2f32

…log build Co-authored-by: 28pins <262898015+28pins@users.noreply.github.com>

Copilot finished work on behalf of 28pins March 9, 2026 14:05

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Add iOS SwiftUI emulator for TWSU DIY Gamer Kit#77

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Copilot AI commented Mar 8, 2026 •

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		// Add a new item to the sequence
		sequence[simonStep] = Int.random(in: 0..<Self.numDirs)

-                    if gamer.display[newX][ballY - velY] == 0 {
-                        blocks[newX][ballY + velY] = 0
-                        velY *= -1
-                    } else {
-                        blocks[ballX + velX][ballY + velY] = 0
-                        velY *= -1; velX *= -1
-                    }
-                }
-            } else {
-                if gamer.display[ballX - velX][newY] == 0 {
-                    blocks[ballX + velX][newY] = 0
-                    velX *= -1
-                    if !(newY > -1 && newY < 8) {
-                        if gamer.display[ballX + velX][ballY - velY] == 0 {
-                            blocks[ballX - velX][ballY - velY] = 0
+                    let checkY = ballY - velY
+                    if checkY >= 0 && checkY < 8 && gamer.display[newX][checkY] == 0 {
+                        let targetY = ballY + velY
+                        if targetY >= 0 && targetY < 8 {
+                            blocks[newX][targetY] = 0
+                        }
+                        velY *= -1
+                    } else {
+                        let targetX = ballX + velX
+                        let targetY = ballY + velY
+                        if targetX >= 0 && targetX < 8 && targetY >= 0 && targetY < 8 {
+                            blocks[targetX][targetY] = 0
+                        }
+                        velY *= -1; velX *= -1
+                    }
+                }
+            } else {
+                let checkX = ballX - velX
+                if checkX >= 0 && checkX < 8 && newY >= 0 && newY < 8 && gamer.display[checkX][newY] == 0 {
+                    let targetX = ballX + velX
+                    if targetX >= 0 && targetX < 8 {
+                        blocks[targetX][newY] = 0
+                    }
+                    velX *= -1
+                    if !(newY > -1 && newY < 8) {
+                        let dispX = ballX + velX
+                        let dispY = ballY - velY
+                        let blockX = ballX - velX
+                        let blockY = ballY - velY
+                        if dispX >= 0 && dispX < 8 && dispY >= 0 && dispY < 8 &&
+                           blockX >= 0 && blockX < 8 && blockY >= 0 && blockY < 8 &&
+                           gamer.display[dispX][dispY] == 0 {
+                            blocks[blockX][blockY] = 0

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Copilot AI commented Mar 8, 2026 •

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