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194 lines
6.8 KiB
194 lines
6.8 KiB
<!DOCTYPE html>
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<html lang="en">
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<meta charset="UTF-8">
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<title>Changelog – Version 2 to Version 3</title>
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body { font-family: Arial, sans-serif; line-height: 1.6; margin: 40px; color: #222; }
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h1 { border-bottom: 2px solid #333; padding-bottom: 10px; }
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h2 { margin-top: 40px; color: #0b5394; }
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h3 { margin-top: 20px; color: #3d85c6; }
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.major { background: #f4f8fb; padding: 15px; border-left: 5px solid #0b5394; }
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.minor { background: #fafafa; padding: 10px; border-left: 4px solid #999; }
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code { background: #eee; padding: 2px 5px; border-radius: 4px; }
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<h1>Version 3 – Comprehensive Changelog</h1>
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<p><strong>Release Scope:</strong> Major architectural overhaul, performance optimization, synchronization stability, enhanced visualization intelligence, and UX refinement.</p>
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<!-- ========================= -->
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<h2>1. Sync Engine Rearchitecture (Major)</h2>
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<div class="major">
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<p>The playback and synchronization system was completely redesigned to eliminate drift, stutter, and race conditions.</p>
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<h3>Key Enhancements:</h3>
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<ul>
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<li>Migration of update logic to <code>videoFrameCallback</code> for deterministic frame synchronization.</li>
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<li>Hybrid video-radar synchronization architecture.</li>
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<li>Centralized offset handling logic.</li>
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<li>Drift cascade lockdown mechanism.</li>
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<li>Manual offset persistence and improved workflow.</li>
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</ul>
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<p><strong>Impact:</strong> Playback engine is now deterministic, stable under low-end hardware, and resilient against multi-tab load conditions.</p>
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</div>
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<!-- ========================= -->
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<h2>2. File Loading & Caching Overhaul (Major)</h2>
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<div class="major">
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<p>Complete modularization of file loading pipeline.</p>
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<h3>Improvements:</h3>
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<ul>
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<li>Extraction of file handling into <code>fileLoader.js</code>.</li>
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<li>Incremental JSON & video loading.</li>
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<li>Race condition fixes using Promise-based DB initialization.</li>
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<li>Non-blocking IndexedDB caching (fire-and-forget).</li>
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<li><code>fromCache</code> optimization flag.</li>
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<li>Unit tests added for loading pipeline.</li>
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</ul>
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<p><strong>Impact:</strong> Eliminated startup crashes, resolved NaN timestamp errors, improved reload time, and increased system robustness.</p>
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</div>
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<!-- ========================= -->
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<h2>3. Performance Optimization Initiative (Major)</h2>
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<div class="major">
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<p>Large-scale performance refactoring across rendering and DOM layers.</p>
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<h3>Optimizations:</h3>
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<ul>
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<li>Removed unnecessary DOM updates and innerHTML usage.</li>
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<li>Canvas rendering optimized to avoid heap allocations.</li>
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<li>Reduced redundant draw calls (axes, explorer updates).</li>
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<li>20% performance gain via throttling.</li>
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<li>FPS counter stabilization with warmup logic.</li>
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</ul>
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<p><strong>Impact:</strong> Significant memory stability improvement and smoother animation loops.</p>
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</div>
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<!-- ========================= -->
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<h2>4. Advanced Visualization & UX Enhancements (Major)</h2>
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<div class="major">
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<p>Visualization layer significantly upgraded.</p>
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<h3>Enhancements:</h3>
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<ul>
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<li>Interactive seeking & scrubbing in speed graph.</li>
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<li>Smart labeling with density-based speed coloring.</li>
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<li>Vehicle dimension visualization.</li>
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<li>Risk & state indicators integrated into track markers.</li>
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<li>Dynamic vertical range slider (20m–200m).</li>
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<li>ROI auto-scaling with dynamic plot boundaries.</li>
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<li>Frame-rate independent smoothing for UI interactions.</li>
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</ul>
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<p><strong>Impact:</strong> Visualization now supports intelligent data interpretation and professional-grade interaction behavior.</p>
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</div>
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<!-- ========================= -->
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<h2>5. Zoom & God Mode Enhancements (Major)</h2>
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<div class="major">
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<ul>
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<li>Advanced zoom control architecture.</li>
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<li>Inverse zoom logic implementation.</li>
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<li>Smooth mouse tracking for tooltip precision.</li>
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<li>Tooltip bounding constraints.</li>
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<li>Shift-key God Mode activation.</li>
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<li>Hover jitter reduction via relative distance square optimization.</li>
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</ul>
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<p><strong>Impact:</strong> Enhanced inspection capability for dense radar scenes with stable UX behavior.</p>
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</div>
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<!-- ========================= -->
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<h2>6. In-App Documentation & Architectural Map (Major)</h2>
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<div class="major">
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<ul>
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<li>Interactive codebase overview with 3D-styled navigation.</li>
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<li>Living documentation integration.</li>
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<li>Color-coded architecture explorer (Core, Sync, UI).</li>
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<li>PrismJS integration for syntax highlighting.</li>
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<li>Mini-map docking navigation system.</li>
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</ul>
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<p><strong>Impact:</strong> Application now self-documents architecture, accelerating onboarding and internal knowledge transfer.</p>
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</div>
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<!-- ========================= -->
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<h2>7. User Guide & Modal System (Major)</h2>
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<div class="major">
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<ul>
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<li>First-run detection with sessionStorage.</li>
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<li>Auto-launch user guide modal.</li>
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<li>Shortcut reference modal.</li>
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<li>Standalone shortcuts.html reference page.</li>
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<li>Header navigation refactor.</li>
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</ul>
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</div>
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<!-- ========================= -->
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<h2>8. Data Explorer Enhancements (Major)</h2>
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<div class="major">
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<ul>
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<li>Draggable and resizable explorer.</li>
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<li>Timeline synchronization.</li>
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<li>Additional track metadata display.</li>
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<li>Performance throttling.</li>
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</ul>
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</div>
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<!-- ========================= -->
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<h2>9. Stability & Bug Fixes (Minor)</h2>
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<div class="minor">
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<ul>
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<li>Fixed smoothing and mapping edge cases.</li>
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<li>Corrected hover detection bug during scroll-zoom.</li>
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<li>Division-by-zero prevention safeguards.</li>
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<li>Fixed handleCloseUpDisplay mouseY bug.</li>
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<li>Debug overlay corrections.</li>
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<li>Speed graph fixes.</li>
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<li>Minor UI fixes and dark mode refinements.</li>
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<li>Removed Google Fonts dependency for offline support.</li>
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<li>Theme-aware coloring improvements.</li>
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<li>Various HTML & margin refinements.</li>
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</ul>
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</div>
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<!-- ========================= -->
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<h2>10. Infrastructure & Refactoring (Minor)</h2>
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<div class="minor">
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<ul>
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<li>Keyboard shortcut isolation.</li>
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<li>UI/session logic separation from main.js.</li>
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<li>Deletion of obsolete files.</li>
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<li>Context & README updates.</li>
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<li>Code cleanup and dead code removal.</li>
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</ul>
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</div>
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<!-- ========================= -->
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<h2>Summary of Version 3</h2>
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<p>
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Version 3 represents a major architectural milestone. The application evolved from a functional visualization prototype into a robust, modular, performance-optimized, and architecturally documented professional tool.
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</p>
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<ul>
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<li>Deterministic Sync Engine</li>
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<li>Modular File Loading Architecture</li>
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<li>High-Performance Rendering Pipeline</li>
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<li>Advanced Data Visualization Intelligence</li>
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<li>Integrated Living Documentation</li>
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<li>Professional UX & Stability Hardening</li>
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</ul>
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<p><strong>Overall Classification:</strong> Major Release – Architectural & Performance Upgrade</p>
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</body>
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</html>
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