PyVizAST Prerelease 0.7.0

New Feature: Webcam Gesture Control

Hand gesture recognition for 2D/3D AST visualization control using MediaPipe.

Supported Gestures:

• Thumb Up: Zoom in
• Thumb Down: Zoom out
• Closed Fist: Pan mode (grab and drag)
• Open Palm: Quick tap = select, Hold = reset view
• Pointing Up: Select node
• Victory (V sign): Rotate mode
• Two Hands Pinch: Pinch to zoom, move both hands to pan

Components:

• GestureService.js: Core gesture recognition service using MediaPipe GestureRecognizer
• GestureControl.js: UI component with camera preview, status indicator, gesture guide
• GestureControl.css: Styling for gesture control overlay

Features:

• Toggle button in header (default OFF)
• Real-time camera preview with gesture overlay
• Status indicator (loading/ready/running/error/stopped)
• Visual gesture guide with action mappings
• Support for both 2D (Cytoscape) and 3D (Three.js) visualizations

Dependencies:

• Added @mediapipe/tasks-vision for gesture recognition

Known Issues:

• Gesture recognition may be unstable in certain lighting conditions
• Future improvements planned: stability filtering, confidence threshold adjustment, gesture cooldown

Files Added:

• frontend/src/utils/GestureService.js
• frontend/src/components/GestureControl.js
• frontend/src/components/GestureControl.css

Files Modified:

• frontend/src/components/Header.js - Added gesture toggle button
• frontend/src/App.js - Added gesture state management
• frontend/src/components/ASTVisualizer.js - Added gesture handling for 2D
• frontend/src/components/ASTVisualizer3D.js - Added gesture handling for 3D
• frontend/package.json - Added MediaPipe dependency