OpenGL 3D Viewer

A Windows desktop 3D model viewer built with WPF, OpenTK, and OpenGL. The project combines a WPF control surface with an OpenTK rendering window to inspect mesh geometry, adjust placement, and preview models in a print-bed style workspace.

Highlights

• Load and inspect STL and GLB models.
• Orbit, pan, and zoom the camera in real time.
• Move, rotate, scale, reset, and clone loaded models.
• Show a printer-bed volume to check model fit against configured build dimensions.
• Open a model from the command line or by using the in-app import workflow.

Tech Stack

• C#
• .NET 10
• WPF for the desktop UI
• OpenTK 4.9.4 for OpenGL integration

Requirements

To build and run the project, you will need:

• Windows 10 or later
• .NET 10 SDK
• Visual Studio with WPF and .NET desktop development support

Getting Started

Build in Visual Studio

1. Clone the repository.
2. Open OpenGL3DViewerMVVM.csproj in Visual Studio.
3. Restore packages and build the solution.
4. Run the project.

Usage Notes

• The viewer opens sample assets from the Testfiles folder, including both STL and GLB examples.
• Viewer settings are persisted under the current user's application data folder.
• Shortcuts:
  • Mouse drag: Orbit camera
  • Scroll wheel: Zoom camera
  • Alt + Mouse drag: Move the selected model
  • Shift + Mouse drag: Pan camera

Project Structure

• Draw/ OpenGL drawing and render helpers
• MeshIOLib/ mesh loading code for supported file formats
• ModelLib/ geometry, model, and utility types
• View/ WPF windows and UI panels
• Resources/ icons, images, and localization assets
• Testfiles/ sample models for quick testing

Credits

Created by Charles Chang (charles.chang@live.com).

Third-party library:

• OpenTK

License

This project is licensed under the MIT License.