Add 3D Cube Chess Web Application with Full Feature Implementation

CUBECHESS_README.md

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+# 3D Cube Chess
+
+A unique chess game implementation where the chess board is played on a 3D rotating cube with fully rendered 3D chess pieces.
+
+## Features
+
+### 1. 3D Chess Pieces
+All chess pieces are rendered as distinct 3D models using Three.js geometries:
+- **Pawn**: Sphere on cylindrical body
+- **Rook**: Castle-like structure with battlements
+- **Knight**: L-shaped with distinctive head
+- **Bishop**: Pointed cone top with sphere
+- **Queen**: Crown with multiple points and sphere
+- **King**: Cross on top of crown
+
+Each piece type has a unique 3D geometry that makes it easily distinguishable on the board.
+
+### 2. Legal Move Visualization
+When you click on a chess piece, the application displays all legal moves for that piece:
+- Valid move squares are highlighted with semi-transparent green circles
+- The number of available moves is displayed in the message area
+- Only pieces of the current player's color can be selected
+- Legal move indicators disappear when another action is taken
+
+### 3. Interactive Gameplay
+- **Click to Select**: Click on any of your pieces to see legal moves
+- **Click to Move**: Click on a green indicator to move the selected piece
+- **Turn-Based**: Alternates between white and black players
+- **Move Counter**: Tracks the total number of moves made
+- **AI Opponent**: After white's move, black automatically makes a move
+
+### 4. 3D Controls
+- **Rotate Cube**: Left-click and drag anywhere on the canvas to rotate the cube
+- **Zoom**: Use mouse wheel to zoom in and out (limited range: 3-15 units)
+- **Smooth Rotation**: Cube rotation includes momentum for natural feel
+- **Reset View**: Button to return camera to default position
+
+### 5. Sample Visualization
+The "Generate Sample Image" button demonstrates the legal move system by:
+1. Selecting a piece from the current player
+2. Displaying all its legal moves
+3. Rotating the cube to an optimal viewing angle
+4. Showing a confirmation message
+
+### 6. Chess Logic
+Complete implementation of standard chess rules:
+- **Pawn**: Forward movement (1 or 2 squares from start), diagonal captures
+- **Rook**: Horizontal and vertical movement
+- **Knight**: L-shaped jumps (2+1 squares)
+- **Bishop**: Diagonal movement
+- **Queen**: Combination of rook and bishop movements
+- **King**: One square in any direction
+
+Pieces cannot move through other pieces (except knights), and captures are properly handled.
+
+## File Structure
+
+```
+cubechess.html      - Main HTML page with UI structure
+cubechess.css       - Styling and responsive design
+cubechess.js        - Game logic, 3D rendering, and interactions
+three.min.js        - Three.js library for 3D graphics
+```
+
+## Technical Details
+
+### Three.js Integration
+- Scene with perspective camera
+- Multiple light sources (ambient, directional, point lights)
+- Shadow mapping for realistic piece shadows
+- Raycaster for mouse picking and selection
+
+### Board Structure
+- 8x8 chess board on each cube face (6 faces total)
+- Currently implements chess on the front face
+- Can be extended to include pieces on other faces for unique gameplay
+
+### Performance
+- Efficient raycasting for piece selection
+- Optimized rendering loop
+- Smooth 60 FPS animation
+- Low-poly piece geometries for performance
+
+### AI System
+The AI opponent uses a simple random move selection:
+1. Finds all black pieces
+2. Calculates legal moves for each piece
+3. Randomly selects one valid move
+4. Executes the move after a 500ms delay
+
+Future enhancements could include:
+- Minimax algorithm with alpha-beta pruning
+- Position evaluation
+- Opening book
+- Difficulty levels
+
+## Browser Compatibility
+
+Works in all modern browsers that support:
+- WebGL (for Three.js rendering)
+- ES6 JavaScript
+- HTML5 Canvas
+
+Tested on:
+- Chrome 90+
+- Firefox 88+
+- Safari 14+
+- Edge 90+
+
+## Controls Reference
+
+| Action | Control |
+|--------|---------|
+| Rotate Cube | Left-click + Drag |
+| Zoom In/Out | Mouse Wheel |
+| Select Piece | Left-click on piece |
+| Move Piece | Left-click on green indicator |
+| New Game | Click "New Game" button |
+| Reset View | Click "Reset View" button |
+| Sample Demo | Click "Generate Sample Image" button |
+
+## Future Enhancements
+
+Potential features for future development:
+1. **Cross-face movement**: Allow pieces to move between cube faces
+2. **Rubik's Cube mechanics**: Rotate cube faces with pieces
+3. **Multiplayer**: Online multiplayer support
+4. **Stronger AI**: Implement chess engine with evaluation
+5. **Move history**: Track and display move notation
+6. **Undo/Redo**: Allow taking back moves
+7. **Save/Load**: Save game state to continue later
+8. **Themes**: Different board and piece color schemes
+9. **Sound effects**: Audio feedback for moves and captures
+10. **Animations**: Smooth piece movement animations
+
+## Development Notes
+
+### Adding New Piece Designs
+To modify piece geometries, edit the `createChessPiece()` function in `cubechess.js`. Each piece uses a combination of Three.js primitive geometries (cylinders, spheres, cones, boxes).
+
+### Extending to Multiple Faces
+To add pieces on other cube faces, modify the `initializeChessBoard()` function to populate additional faces with pieces. You'll also need to implement cross-face movement logic.
+
+### Modifying Chess Rules
+Chess move logic is separated by piece type in individual functions:
+- `getPawnMoves()`
+- `getRookMoves()`
+- `getKnightMoves()`
+- `getBishopMoves()`
+- `getQueenMoves()`
+- `getKingMoves()`
+
+### Styling
+All visual styling is in `cubechess.css`. The UI uses backdrop filters for a modern glassmorphism effect and includes responsive breakpoints for mobile devices.
+
+## Credits
+
+- Three.js library for 3D rendering
+- Chess rules implementation based on standard FIDE rules
+- UI design inspired by modern web applications
+
+## License
+
+Part of the Salsoftware project. See main repository for license details.

cubechess.css

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+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: 'Arial', sans-serif;
+    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
+    overflow: hidden;
+    color: #fff;
+}
+
+#game-container {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    z-index: 1;
+}
+
+#ui-overlay {
+    position: fixed;
+    top: 20px;
+    left: 20px;
+    right: 20px;
+    z-index: 10;
+    pointer-events: none;
+}
+
+#ui-overlay * {
+    pointer-events: auto;
+}
+
+.header {
+    background: rgba(0, 0, 0, 0.7);
+    padding: 15px 25px;
+    border-radius: 10px;
+    backdrop-filter: blur(10px);
+    margin-bottom: 15px;
+}
+
+.header h1 {
+    font-size: 28px;
+    margin-bottom: 8px;
+    color: #4fc3f7;
+    text-shadow: 0 0 10px rgba(79, 195, 247, 0.5);
+}
+
+.controls-info p {
+    font-size: 14px;
+    color: #b0bec5;
+    margin: 0;
+}
+
+.game-info {
+    background: rgba(0, 0, 0, 0.7);
+    padding: 15px 25px;
+    border-radius: 10px;
+    backdrop-filter: blur(10px);
+    display: flex;
+    gap: 30px;
+    margin-bottom: 15px;
+}
+
+#turn-indicator {
+    font-size: 18px;
+    font-weight: bold;
+    color: #4fc3f7;
+}
+
+#move-count {
+    font-size: 18px;
+    color: #b0bec5;
+}
+
+.button-group {
+    background: rgba(0, 0, 0, 0.7);
+    padding: 15px 25px;
+    border-radius: 10px;
+    backdrop-filter: blur(10px);
+    display: flex;
+    gap: 15px;
+}
+
+button {
+    padding: 10px 20px;
+    font-size: 14px;
+    font-weight: bold;
+    border: none;
+    border-radius: 5px;
+    cursor: pointer;
+    transition: all 0.3s ease;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    color: white;
+    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
+}
+
+button:hover {
+    transform: translateY(-2px);
+    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
+}
+
+button:active {
+    transform: translateY(0);
+}
+
+#message-area {
+    margin-top: 15px;
+    background: rgba(0, 0, 0, 0.7);
+    padding: 15px 25px;
+    border-radius: 10px;
+    backdrop-filter: blur(10px);
+    font-size: 16px;
+    color: #ffeb3b;
+    min-height: 50px;
+    display: none;
+}
+
+#message-area.active {
+    display: block;
+}
+
+.piece-highlight {
+    opacity: 0.6;
+}
+
+.legal-move-indicator {
+    opacity: 0.7;
+}
+
+/* Responsive design */
+@media (max-width: 768px) {
+    .header h1 {
+        font-size: 22px;
+    }
+
+    .controls-info p {
+        font-size: 12px;
+    }
+
+    .game-info {
+        flex-direction: column;
+        gap: 10px;
+    }
+
+    .button-group {
+        flex-direction: column;
+    }
+
+    button {
+        width: 100%;
+    }
+}

cubechess.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>3D Cube Chess</title>
+    <link rel="icon" href="ico.png" type="image/png">
+    <link rel="stylesheet" href="cubechess.css">
+</head>
+<body>
+    <div id="ui-overlay">
+        <div class="header">
+            <h1>3D Cube Chess</h1>
+            <div class="controls-info">
+                <p><strong>Controls:</strong> Left-click and drag to rotate | Right-click and drag to zoom | Click piece to see legal moves</p>
+            </div>
+        </div>
+        <div class="game-info">
+            <div id="turn-indicator">White's Turn</div>
+            <div id="move-count">Moves: 0</div>
+        </div>
+        <div class="button-group">
+            <button id="newGameBtn">New Game</button>
+            <button id="generateSampleBtn">Generate Sample Image</button>
+            <button id="resetViewBtn">Reset View</button>
+        </div>
+        <div id="message-area"></div>
+    </div>
+    <div id="game-container"></div>
+
+    <script src="three.min.js"></script>
+    <script src="cubechess.js"></script>
+</body>
+</html>