Vulkan Technical Demo

This is a realtime 3D rendering application written in Vulkan / C++ / GLSL.

Developing Environments

• OS: Windows 10
• IDE: Visual Studio 2019
• GPU: RTX 2060 SUPER

Successful build on other environments is not guaranteed.

Third Party

• tinyobjloader
• stb collection
• imgui

References

A lot of code were based on these great resources:

• Vulkan tutorial by Alexander Overvoorde
• Vulkan samples by Sascha Willems
• Nvpro Core from NVIDIA DesignWorks Samples
• LearnOpenGL by Joey de Vries

Updates

N-Body Simulation + HDR & Bloom - (Oct.31.2021)

Average frame time: 5.57ms (179.6 FPS)

• 32768 particles (uniformly distributed on the surface of a sphere)
• Screen resolution 1200x800
• HDR (reinhard tone mapping)
• Bloom (gaussian blur)
• Compute shader + shared variables

Deferred Rendering + SSAO & MSAA - (Oct.05.2021)

Youtube link : https://youtu.be/CDU1MrpubUw

Scene setup

• 20 point lights
• 1024 bunnies - instanced rendering
• Screen resolution 1200x800
• MSAA applied (maximum sample count supported by current device)

Optimization #1

Used edge detection (comparing neighborhood normal vectors) to only apply msaa to the pixels on edges

Optimization #2

To fix thread coherence problem ("edge pixels" and "non-edge pixels" are computed in one pass), the render pass for edge pixels was separated by using stencil buffer generated from edge detection algorithm.

Reference : Antialiased Deferred Rendering by NVIDIA Gameworks

MSAA - (Sep.16.2021)

Skybox & environment (reflection) mapping - (Sep.16.2021)

Skybox textures: http://www.humus.name/index.php?page=Textures&start=8

Initial framework - (Sep.06.2021)

Initial scene with stanford bunny - simple diffuse light applied

Most of basic vulkan features were implemented at this point:

• Devices: Collection of physical / logical device handle
  
• Swapchain: Manage images in swapchain (acquire / present)
  
• MemoryAllocator: Naive memory allocator that pre-allocate big chunk(s) of memory per memory type
  
• Textures: Load texture from a file (stb_image used)
  
• Mesh: Load model from a obj file (tinyobjloader used)