rabbithole

3D Game Engine written in C++ and Vulkan using GLTF models

Rabbithole editor style using Dear ImGui

<b>List of features:</b>

• <b>Texture Debugging</b>
• <b>Light params</b>
• <b>SSAO params</b>
• <b>Volumetric Fog</b>
• <b>GPU Profiler</b>

Raytraced shadows and denoiser

• software raytracing using compute shaders
• support for multiple lights (up to 4 for now)
• fully raytraced shadows with soft shadows
• support for omni and directional lighting (point and area)
• fully integrated AMD FX Shadows Denoiser <url>https://gpuopen.com/fidelityfx-denoiser</url>
• tweaking light size will soften the shadow

FSR 2.0 upscaling

• upscaling with multiple modes and resolution scale factors
• https://gpuopen.com/fidelityfx-superresolution-2

Volumetric Fog

• volumetric fog with multiple lights support in compute shader with raytraced shadows
• implementation based on Bart Wronski's idea from SIGGRAPH 2014 : <url>https://bartwronski.com/publications/</url>

Bloom

• bloom fully implemented in compute shader
• based on http://www.iryoku.com/next-generation-post-processing-in-call-of-duty-advanced-warfare
• 5 downscale passes into mips of a single texture with temporally stable box filtering
• 5 upscale passes back to original resolution with tent filtering
• whole bloom pass, with apply (on RTX3070) takes less than 0.3ms on 1080p resolution

SSAO

• ssao generation using compute shader (fragment shader option also available)
• simple cheap blur
• less then 0.6ms in total on RTX3070

Other features

• PBR technique for lighting and tweakable basic SSAO for ambient occlusion
• GLTF models
• SPIR-V reflection and VMA for shader reflection and GPU memory allocation
• ImGui <url>https://github.com/ocornut/imgui</url>