PBR Model Viewer

A simple app for viewing 3D models, powered by Vulkan. Rendering uses Physically-Based Rendering (PBR) techniques, incorporating Image Based Lighting (IBL) with HDR environment maps to achieve realistic lighting.

Features

• Loading all kinds of models using Assimp
• PBR lighting model using the Cook-Torrance GGX
• IBL using user selectable HDR environment maps, convolved and prefiltered at runtime
• SSAO usable interchangably with baked AO maps provided during model loading
• Instancing used to minimize draw calls
• ImGui user interface

Compilation

To compile this code you need to have the LunarG Vulkan SDK installed.

The project is compiled simply using cmake:

cmake --build <build-directory-name>

When modifying shaders, they need to be recompiled. To compile shaders, first go into the shaders directory and run:

./compile.bat

Then, run an exporter tool (which is compiled alongside the main executable) that exports shader Spir-V code into an embeddable C++ source file:

cd <build-directory-name>
shader_export.exe

Keep in mind that currently this project requires your machine to support Vulkan 1.3 (which is subject for change in the future). All other dependencies are included in the deps subdirectory.

Controls

Press ` to open/close the GUI. Drag the left mouse button to rotate the camera around your model. Drag the right mouse button to pan your model.

Gallery

Future improvements

• Add more post-processing effects
• More lighting customization (add point lights)
• Maybe add shadows
• Add a blur option for the background environment
• Clean up code