vviewer

A real time rendering and offline volumetric path tracing engine library written in Vulkan, and a 3D UI scene editor application written in Qt. Uses VK_KHR_ray_query.html and VK_KHR_ray_tracing_pipeline.html for GPU accelerated ray tracing implementing ray generation, ray closest hit, ray any hit and ray miss shaders.

Features

• Spatially varying Physically based (Metallic/Roughness) and Lambert materials
  • alpha, normal, emissiveness and ambient occlusion
• Bindless descriptors
• Point, Directional and Mesh lights
• HDR equirectangular and cubemap environment maps
• Perspective and Orthographic cameras
• Tone mapping
• Real time rendering
  • Deferred rendering
  • Ray traced shadows
  • Intancing
  • Image Based Lighting
• GPU path traced rendering
  • Multiple importance sampling
    • Light sampling
    • BRDF sampling
  • Low discrepancy samplers
  • Next event estimation
  • Homogeneous media
  • Russian roulette
  • Depth of field
  • Denoising
• Entity component system
• Export and Import scenes
• Cross platform build

Dependencies

vengine library

• Vulkan SDK. Set the VULKAN_SDK environment variable. Version tested 1.3.204.1
• assimp. Set the ASSIMP_ROOT_DIR environment variable. Version tested 5.2.5
• OpenImageDenoise. Set the OIDN_ROOT_DIR environment variable. Version tested 2.1.0

vviewer binary

• Qt. Set the Qt6_DIR environment variable. Version tested 6.2.4

Building

• Install dependencies
• Clone the project and all its submodules
• Create build folder, run cmake and build
• Runtime dependencies like the shaders and the assets folders are copied automatically, but in any case, make sure they are besides the binary

Usage

• Run vviewer binary for the scene editor. Needs Qt dependency
• See offlinerender to use the rendering library without UI

Images

Known issues

• If a render fails with Device Lost, restart the application and render the scene with a smaller batch size