# 🚀 Advanced Accessibility Features - Future Roadmap (v2.0+)

## 📅 Planning Document
**Status**: Future Development  
**Target Version**: 2.0+  
**Priority**: Experimental

---

## 🎯 Advanced Input Systems

### **1. Eye Tracking (Tobii)**

#### **Overview:**
Support for Tobii eye tracking devices for players who cannot use traditional input methods.

#### **Hardware Requirements:**
- Tobii Eye Tracker 5
- Tobii Eye Tracker 4C
- Compatible Windows 10/11 PC

#### **Features to Implement:**
- [ ] Tobii SDK integration
- [ ] Gaze-based cursor control
- [ ] Dwell clicking (look at target for X seconds)
- [ ] Gaze gestures (look patterns)
- [ ] Eye-controlled menu navigation
- [ ] Calibration system
- [ ] Sensitivity settings
- [ ] Gaze smoothing

#### **Technical Notes:**
```javascript
// Pseudo-code for Tobii integration
class EyeTrackingSystem {
    constructor() {
        this.tobiiAPI = null;
        this.gazePoint = { x: 0, y: 0 };
        this.dwellTime = 1000; // ms
        this.calibrated = false;
    }

    async init() {
        // Load Tobii SDK
        this.tobiiAPI = await loadTobiiSDK();
        await this.calibrate();
    }

    update() {
        // Get gaze point
        this.gazePoint = this.tobiiAPI.getGazePoint();
        
        // Check for dwell click
        if (this.isDwelling()) {
            this.performClick();
        }
    }
}
```

#### **Resources:**
- Tobii Gaming SDK: https://developer.tobii.com/
- Documentation: https://developer.tobii.com/tobii-gaming/
- Unity/Unreal plugins available (adapt for Phaser)

---

### **2. Voice Control**

#### **Overview:**
Voice commands for hands-free gameplay using speech recognition.

#### **Features to Implement:**
- [ ] Web Speech API integration
- [ ] Custom voice commands
- [ ] Continuous listening mode
- [ ] Wake word detection
- [ ] Multi-language support
- [ ] Command confirmation
- [ ] Voice feedback
- [ ] Noise cancellation

#### **Voice Commands:**
```javascript
const voiceCommands = {
    // Movement
    'move north': () => player.move(0, -1),
    'move south': () => player.move(0, 1),
    'move east': () => player.move(1, 0),
    'move west': () => player.move(-1, 0),
    
    // Actions
    'attack': () => player.attack(),
    'interact': () => player.interact(),
    'open inventory': () => ui.openInventory(),
    'use item': () => player.useItem(),
    
    // Menu
    'open map': () => ui.openMap(),
    'save game': () => game.save(),
    'pause': () => game.pause(),
    
    // Custom
    'help': () => screenReader.announceHelp()
};
```

#### **Technical Implementation:**
```javascript
class VoiceControlSystem {
    constructor() {
        this.recognition = new webkitSpeechRecognition();
        this.recognition.continuous = true;
        this.recognition.interimResults = false;
        this.commands = new Map();
    }

    init() {
        this.recognition.onresult = (event) => {
            const command = event.results[0][0].transcript.toLowerCase();
            this.executeCommand(command);
        };
        
        this.recognition.start();
    }

    registerCommand(phrase, callback) {
        this.commands.set(phrase, callback);
    }

    executeCommand(phrase) {
        if (this.commands.has(phrase)) {
            this.commands.get(phrase)();
            this.speak(`Executing ${phrase}`);
        }
    }
}
```

---

### **3. Head Tracking**

#### **Overview:**
Camera-based head tracking for players with limited hand mobility.

#### **Hardware:**
- Webcam (720p minimum)
- TrackIR (optional)
- PlayStation Camera (optional)

#### **Features:**
- [ ] WebRTC camera access
- [ ] Face detection (TensorFlow.js)
- [ ] Head position tracking
- [ ] Head gesture recognition
- [ ] Calibration system
- [ ] Sensitivity adjustment
- [ ] Deadzone configuration

#### **Use Cases:**
- Head tilt = camera rotation
- Head nod = confirm action
- Head shake = cancel action
- Head position = cursor control

---

### **4. Foot Pedal Support**

#### **Overview:**
USB foot pedal support for alternative input.

#### **Hardware:**
- USB foot pedals (generic HID)
- Programmable foot switches

#### **Features:**
- [ ] HID device detection
- [ ] Pedal mapping system
- [ ] Multi-pedal support (2-4 pedals)
- [ ] Pressure sensitivity
- [ ] Custom bindings

---

## 🔊 Audio-Only Mode (Experimental)

### **Overview:**
Complete audio-based gameplay for blind players.

### **1. 3D Positional Audio**

#### **Features:**
- [ ] Web Audio API 3D positioning
- [ ] HRTF (Head-Related Transfer Function)
- [ ] Distance-based attenuation
- [ ] Doppler effect
- [ ] Reverb/echo for spatial awareness
- [ ] Binaural audio

#### **Implementation:**
```javascript
class Audio3DSystem {
    constructor() {
        this.audioContext = new AudioContext();
        this.listener = this.audioContext.listener;
        this.sources = new Map();
    }

    createPositionalSound(x, y, z, soundFile) {
        const panner = this.audioContext.createPanner();
        panner.panningModel = 'HRTF';
        panner.distanceModel = 'inverse';
        panner.refDistance = 1;
        panner.maxDistance = 100;
        panner.rolloffFactor = 1;
        panner.coneInnerAngle = 360;
        panner.coneOuterAngle = 0;
        panner.coneOuterGain = 0;
        
        panner.setPosition(x, y, z);
        
        return panner;
    }

    updateListenerPosition(x, y, z) {
        this.listener.setPosition(x, y, z);
    }
}
```

---

### **2. Audio Radar**

#### **Overview:**
Continuous audio feedback about surroundings.

#### **Features:**
- [ ] Sonar-like ping system
- [ ] Object proximity beeps
- [ ] Directional audio cues
- [ ] Material-based sounds
- [ ] Obstacle detection
- [ ] Path finding audio

#### **Audio Cues:**
- **Nearby object**: Beep frequency increases
- **Wall ahead**: Low rumble
- **Enemy nearby**: Growl sound
- **Item nearby**: Chime sound
- **Safe path**: Gentle tone

---

### **3. Voice Commands (Enhanced)**

See Voice Control section above.

---

### **4. Haptic Feedback**

#### **Overview:**
Vibration feedback for mobile/controller.

#### **Features:**
- [ ] Gamepad vibration API
- [ ] Mobile vibration API
- [ ] Pattern-based feedback
- [ ] Intensity control
- [ ] Custom vibration patterns

#### **Vibration Patterns:**
```javascript
const hapticPatterns = {
    damage: [100, 50, 100],
    pickup: [50],
    error: [200, 100, 200, 100, 200],
    success: [50, 50, 50],
    warning: [100, 100, 100, 100],
    heartbeat: [80, 120, 80, 500] // Repeating
};
```

---

## ✅ Compliance Goals

### **WCAG 2.1 Level AA**

#### **Requirements:**
- [x] **1.1 Text Alternatives**: All non-text content has text alternative
- [x] **1.2 Time-based Media**: Captions and audio descriptions
- [x] **1.3 Adaptable**: Content can be presented in different ways
- [x] **1.4 Distinguishable**: Easy to see and hear
- [x] **2.1 Keyboard Accessible**: All functionality via keyboard
- [x] **2.2 Enough Time**: Users have enough time to read/use content
- [x] **2.3 Seizures**: No content that causes seizures
- [x] **2.4 Navigable**: Ways to navigate and find content
- [x] **2.5 Input Modalities**: Multiple input methods
- [x] **3.1 Readable**: Text is readable and understandable
- [x] **3.2 Predictable**: Pages appear and operate predictably
- [x] **3.3 Input Assistance**: Help users avoid and correct mistakes
- [x] **4.1 Compatible**: Compatible with assistive technologies

#### **Current Status**: ✅ **COMPLIANT**

---

### **CVAA Compliance**

#### **21st Century Communications and Video Accessibility Act**

#### **Requirements:**
- [x] Closed captions
- [x] Video description
- [x] User interface accessibility
- [x] Compatible with assistive technologies

#### **Current Status**: ✅ **COMPLIANT**

---

### **AbleGamers Certification**

#### **Certification Process:**
1. Submit game for review
2. AbleGamers testing with disabled gamers
3. Feedback and recommendations
4. Implement improvements
5. Re-submit for certification
6. Receive certification badge

#### **Contact:**
- Website: https://ablegamers.org/
- Email: info@ablegamers.org

#### **Current Status**: 📋 **READY FOR SUBMISSION**

---

### **Can I Play That? Review**

#### **Review Process:**
1. Submit game for accessibility review
2. Detailed testing by disabled gamers
3. Receive accessibility report
4. Implement recommendations
5. Feature in accessibility database

#### **Categories:**
- Visual
- Hearing
- Mobility
- Cognitive

#### **Contact:**
- Website: https://caniplaythat.com/
- Submit: https://caniplaythat.com/submit-a-game/

#### **Current Status**: 📋 **READY FOR SUBMISSION**

---

## 📊 Implementation Priority

### **Phase 1 (v2.0):**
1. Voice Control (Web Speech API)
2. Enhanced Haptic Feedback
3. WCAG 2.1 AA Certification

### **Phase 2 (v2.1):**
1. 3D Positional Audio
2. Audio Radar
3. AbleGamers Submission

### **Phase 3 (v2.2):**
1. Head Tracking (Webcam)
2. Foot Pedal Support
3. Can I Play That? Submission

### **Phase 4 (v2.3+):**
1. Eye Tracking (Tobii)
2. Audio-Only Mode (Full)
3. CVAA Certification

---

## 💰 Budget Estimates

### **Development:**
- Voice Control: 40 hours
- 3D Audio: 60 hours
- Head Tracking: 80 hours
- Eye Tracking: 120 hours
- Audio-Only Mode: 160 hours

### **Hardware:**
- Tobii Eye Tracker 5: $230
- USB Foot Pedals: $50-150
- TrackIR: $150
- Testing Controllers: $200

### **Certification:**
- AbleGamers: Free (volunteer-based)
- Can I Play That?: Free (review-based)
- WCAG Audit: $2,000-5,000 (optional)

---

## 📚 Resources

### **APIs & SDKs:**
- Web Speech API: https://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API
- Web Audio API: https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API
- Gamepad API: https://developer.mozilla.org/en-US/docs/Web/API/Gamepad_API
- Tobii SDK: https://developer.tobii.com/
- TensorFlow.js: https://www.tensorflow.org/js

### **Standards:**
- WCAG 2.1: https://www.w3.org/WAI/WCAG21/quickref/
- CVAA: https://www.fcc.gov/consumers/guides/21st-century-communications-and-video-accessibility-act-cvaa
- ARIA: https://www.w3.org/WAI/standards-guidelines/aria/

### **Communities:**
- AbleGamers: https://ablegamers.org/
- Can I Play That?: https://caniplaythat.com/
- Game Accessibility Guidelines: http://gameaccessibilityguidelines.com/

---

**Last Updated**: 2025-12-12  
**Version**: 2.5.0  
**Status**: 📋 Planning Phase