STL Viewer

**3D Model Viewer - Your Portable 3D File Browser** 🎨 A professional 3D model viewing app designed for 3D printing enthusiasts, engineers, and designers. Easily view, rotate, and analyze your 3D model files on your phone! ### ✨ Core Features **📂 Powerful File Format Support** • STL Format - Perfect support for ASCII and Binary formats • OBJ Format - Supports vertices, normals, and face data • ZIP Archives - Batch import multiple models • RAR Archives - Auto-extract and load models • 7Z Archives - Support for high compression formats • Simultaneous loading and management of multiple files **🎯 Intuitive 3D Viewing Experience** • Real-time 3D Rendering - Smooth rendering based on OpenGL ES 2.0 • Wireframe Mode - Clearly display model topology structure • Reference Grid - Helps understand model spatial position and scale • Professional Lighting Effects - Better observe model details • Auto-scaling and Centering - Models automatically fit the screen **👆 Flexible Touch Controls** • Single-finger Rotation - Drag in center area for 360° free model rotation • Two-finger Zoom - Pinch/spread gestures for precise size control (0.1x-10x) • Edge Panning - Drag at screen edges to move model up/down/left/right • Double-tap Reset - Quick return to initial view • Auto-rotation - Model auto-displays, switches to manual control after touch **📦 Multi-model Management** • Load multiple 3D model files simultaneously • Independently control each model's show/hide state • Display model name and vertex count information • Batch management, one-click show/hide all models ### 🎯 Use Cases **3D Printing Enthusiasts** • Quickly preview STL print files • Check model structure and topology • Confirm model is complete and defect-free **Engineers and Designers** • View CAD-exported models on mobile • Present 3D designs to clients on-site • Quickly check model dimensions and structure **3D Modeling Learners** • Learn 3D model structure • Observe professional model topology • Understand 3D geometry principles **Educators** • Display 3D models in classroom • Demonstrate solid geometry teaching • Intuitively present 3D concepts ### 💡 How to Use **1. Open File** - Click "+" button to select file from phone - Support opening directly from file manager - Support batch selection of multiple files **2. View Model** - Single-finger drag to rotate and view all angles - Two-finger pinch/spread to zoom model - Drag at screen edges to pan model position **3. Switch Display Modes** - Click wireframe button to toggle wireframe mode - Click grid button to show/hide reference grid - View more structural details **4. Manage Multiple Models** - Click list button to view all loaded models - Use switches to control each model's show/hide **5. Reset View** - Double-tap screen to quickly reset to initial view - Or click settings to restore default settings ### ⚡ Performance Features • Lightweight app, installation package under 10MB • Smooth 60FPS rendering performance • Supports large models (millions of triangles) • Low memory usage, no lag • Fast loading, ready to use ### 🔐 Privacy & Permissions • Only requires file read permission • Does not collect any personal information • No network connection required • Completely offline operation • Your files remain entirely on local device ### 📊 Technical Specifications • Minimum System Requirements: Android 7.0 (API 24) • Recommended System: Android 10 and above