Sparse Voxel Octree (Vulkan Version)

A GPU SVO Builder using the rasterization pipeline, an efficient SVO ray marcher and a simple SVO path tracer.
If you want an OpenGL version, check OpenGL branch.

Compilation

mkdir build && cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
make

Built With

volk - Vulkan meta-loader
VulkanMemoryAllocator - Vulkan memory allocation
GLFW - Window creation and management
GLM - Maths calculations
stb_image - Image loading
TinyOBJLoader - Obj loading
TinyEXR - EXR file saving
meshoptimizer - Optimize mesh
ImGui - UI rendering
tinyfiledialogs - Call native file dialog (require Zenity on linux)
spdlog - Logging system
FontAwesome - Icon font

Usage

Camera
- W A S D - move around (horizontally)
- SPACE - go up
- LSHIFT - go down
- Drag - change perspective
X - toggle ui display

Improvements

The new Vulkan version is much faster than the old OpenGL version, given the comparison below:

GTX 1660 Ti

| SVO build time | Crytek Sponza (2^10) | San Miguel (2^11) | Living Room (2^12) | | -------------- | -------------------- | ----------------- | ------------------ | | Vulkan (new) | 19 ms | 203 ms | 108 ms | | OpenGL (old) | 470 ms | -- | -- |

Quadro M1200

| SVO build time | Crytek Sponza (2^10) | San Miguel (2^11) | Living Room (2^12) | | -------------- | -------------------- | ----------------- | ------------------ | | Vulkan (new) | 80 ms | 356 ms | 658 ms | | OpenGL (old) | 421 ms | 1799 ms | 3861 ms |

In addition, the new Vulkan version has some advanced features such as asynchronous model loading and asynchronous path tracing.

TODOs

v1.0

[x] Allow window resizing
[x] Test queue ownership transfer
[x] Environment map

v2.0

[ ] Voxel editor ?
[ ] Gradient-domain path tracing ?
[ ] Build SVO contours ?

Reference

https://www.seas.upenn.edu/~pcozzi/OpenGLInsights/OpenGLInsights-SparseVoxelization.pdf - Voxelization and SVO building
https://research.nvidia.com/publication/efficient-sparse-voxel-octrees - SVO ray march

SparseVoxelOctree

Install / Use

README