JoyEngine

INFORMATION: software/hardware DDGI raytracing has been moved to origin/DDGI_software_and_hardware_raytracing

Toy engine written in C++ and Directx 12.

Trello board with progress: https://trello.com/b/7in0jgTy/joyengine

FEATURES:

DDGI

Dynamic Diffuse Global Illumination with software raytracing fully on GPU side based on LBVH and Radix Sort. Credits:

• N. Satish, M. Harris and M. Garland, "Designing efficient sorting algorithms for manycore GPUs," 2009 IEEE International Symposium on Parallel & Distributed Processing, Rome, Italy, 2009, pp. 1-10
• https://developer.nvidia.com/blog/thinking-parallel-part-iii-tree-construction-gpu/
• Zander Majercik, Jean-Philippe Guertin, Derek Nowrouzezahrai, and Morgan McGuire, Dynamic Diffuse Global Illumination with Ray-Traced Irradiance Fields, Journal of Computer Graphics Techniques (JCGT), vol. 8, no. 2, 1-30, 2019

Clustered deferred shading

Custom deserialization

Simple rapidjson-based classes deserialization. Usage:

// in SomeClass.h
DECLARE_CLASS(SomeClass)
class SomeClass : public Serializable {
        DECLARE_CLASS_NAME(SomeClass)
        REFLECT_FIELD(float, someFloat);
        REFLECT_FIELD(int, someInt);
};

Separate project for asset building

All assets are loaded into the engine using custom binary format. I have JoyAssetBuilder project written in C#/WinForms for cooking all that data. In future engine and builder will be compined together in one engine project with custom editor.

Other features

• Bindless textures
• Tonemapping
• Gamma correction
• Block compressed textures
• HDR skybox

Building

Clone this project with dependencies and build JoyEngineDX.sln

Dependencies

• glm
• ImGui
• rapidjson
• tinyobjloader (for Asset Builder)

WARNING: for GPU sorting part in software raytracing I used new HLSL wave intrinsics for scan stage. So it's obligation to run this project on Nvidia GPUs because of lane size equal to 32. DO NOT RUN IT ON AMD