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ComplexMiner.png

Venus Engine

Trailer Overview

About Venus Engine

Venus Engine is a lightweight game engine. It designed to take full advantage of DirectX 12 and DirectX Raytracing framework (DXR). The engine is intended to be used as graphics engine of my thesis and personal project by referencing several engines, including MiniEngine and Diligent Engine.

Artifacts

  • Thesis: Real-time Ray-traced Caustics Effects

CausticsStaticGlassware2048.gif

Caustics effects of static glassware

CausticsMovableWater.gif

Caustics effects of water

  • Project: Complex Miner

ComplexMiner.png

Using screen space lighting

Goals

  • Learning and mastering the D3D12 modern api and HLSL 6.0+.

  • Implementing the real-time raytracing method by using DirectX Raytracing framework (DXR).

  • Integrating multi-threading rendering.​

Features

  • DirectX 12 based renderer

  • DirectX Raytracing framework

  • CPU driven multi-threading job system

  • Deferred rendering

  • BRDF with PBR material

Resources Management

Buffers and Textures Resources

In traditional Direct3D application, resources were created with specific types, such as ID3D11Buffer and ID3D11Texture2D. The designed purposes behind this were intent to allow user to manage resources creation with different API functions. In D3D12, this design pattern was removed and replaced with only ID3D12Resource.

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Venus Engine embedded different resources in C++ classes. Below diagrams illustrate the resource framework in Venus.

Dynamic Resource Allocation

To minimize overhead costs of resource creation, Venus Engine implemented the dynamic resource allocation using object pool pattern. Below source codes are dynamic resource structures and methods.

ResourceAllocator.hpp

ResourceAllocator.cpp

DirectX Raytracing Framework

HLSL 6.0

In DXR framework, the raytracing shader requires the compiler with HLSL 6.0. Venus Engine use dxcompiler.lib to compile raytracing shader in runtime. Here's the compilation and validation code of DXR shader.

Shader.cpp

DXR Class

DXR framework is designed to allow implementations to process rays independently. This includes the raytracing shader group, acceleration structure and state object. For more information, please refer to DXR Functional Spec.

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In Venus Engine, I implemented the following classes:

  • RaytracingStateObject

  • ShaderTable

  • AccelerationStructure

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The code below is the raytracing function called by renderer.

Shader.cpp

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