3D Model Viewer

3D Model Viewer renders 3D models using a custom game engine developed by Pilgrimage Games. It serves as a basic demonstration of the 3D capabilities of the proprietary engine.

All code has been written from scratch in-house following "handmade" principles, with minimal use of external libraries and other dependencies. The only exception to this is Dear ImGui for the GUI. In lieu of even the C standard library, Pilgrimage Games maintains its own internal common library.

While 3D Model Viewer is open-source, the underlying game engine and its various graphics backends, as well as internal library and platform code, remain closed-source. See Releases to download and run the application.

Features

• Physically-based rendering (PBR) with support for albedo, metallic-roughness, normal, and emissive textures, as well as transparent and translucent materials
• Custom renderers for all modern PC graphics APIs (Direct3D 11, Direct3D 12, OpenGL, and Vulkan)
• Bindless rendering and root constants (Direct3D 12/Vulkan)
• Support for arbitrary display resolutions, refresh rates, and aspect ratios
• Support for Steam Deck and other Linux-based devices via Proton
• Arcball camera (camera is rotated on a sphere around the model)
• Mouse/keyboard and gamepad controls for model selection, rotation, zoom, etc.
• Immediate-mode GUI for displaying performance metrics, controls, etc.

NOTE: The OpenGL renderer has a known bug that displays a black screen on some graphics hardware and driver configurations. The issue will be addressed in a future release.

Models

The included 3D models are processed from their original glTF 2.0 binary format (.glb) and packed into a single Pilgrimage Games Assets (.pga) file.

Attributions

• "Baker and the Bridge" by Conrad Justin is licensed under Sketchfab Standard.
• "Corset" by Microsoft is Public Domain.
• "Damaged Helmet" by theblueturtle_ is licensed under CC BY-NC 4.0.
• "Ftm" by luyssport is licensed under CC BY-NC-SA 4.0.
• "Metal-Rough Spheres" by Ed Mackey is licensed under CC BY 4.0.
• "PlayStation 1" by Lars Maes is licensed under CC BY 4.0.
• "Ship in a Bottle" by Loic Norgeot is licensed under CC BY-NC 4.0.
• "Water Bottle" by Microsoft is Public Domain.