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AI Chatbot
An interactive Unity 6 AI assistant with real-time chat, TTS, STT, animated character, and event-driven architecture built with Zenject.
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Overview
Interactive 3D chatbot built in Unity 6. Users can type or dictate messages, receive responses from a mock API, and see the character react with voice, stats, and contextual animations.
The project uses Zenject dependency injection and an event-driven architecture, with no singletons or global state.
Features
- Chat UI: message history, user/character bubbles, error states.
- HTTP API: Mockoon integration with timeout and graceful error handling.
- Character Stats: dynamic name, satisfaction (
0–100) and mood (0–6). - Animations: Mixamo character with Idle, Happy, Mad and fallback states.
- Text-to-Speech: VoiceRSS playback with cancellation of outdated requests.
- Speech-to-Text: Whisper-based microphone input with recording feedback.
Architecture
| Component | Responsibility |
|---|---|
MockoonClient | HTTP, timeout, response parsing |
ChatDisplay | Chat UI and input |
MoodAnimationController | Mood → animation state |
VoiceRssService | TTS and audio playback |
WhisperService | Microphone and STT |
SceneInstaller | Zenject bindings |
Technical Highlights
- Modular architecture with Zenject DI and C# events.
- No singletons or static service access.
- Custom parser for mixed JSON +
StatusAPI responses. - TTS requests cancel outdated audio automatically.
- Network errors are displayed directly in the chat.
- Input, networking, UI, audio and animation remain fully decoupled.
The result is a compact, extensible conversational character system focused on clean architecture, maintainability and responsive user interaction.