Portfolio

Background

I have been programming in C++ for over 20 years and have been doing a bit of everything in my free time and professional career. Examples: computer vision, computer graphics, performance optimization, networking, OS bootloader, JPEG decoder, GUI desktop applications, gameplay, crash handlers, HTTP file server, HTTP downloader, e-shop desktop client, command-line applications, etc.

My main interests are computer graphics and game technology in general. Most of what I've done cannot be shown because it was either done for work or not released as open source.

Experience

From work:

• Interacted with the devkits for PS4, PS5, Xbox One, Xbox Series, Switch
• Fixed synchronization issues and various rendering artifacts
• Fixed API usage issues on Xbox
• Wrote Direct3D 9/11/12 code for various projects
• Used MMX/SSE assembly and intrisics for optimizing real-time image processing for computer vision

Personal:

• Over 20 years of C++ experience
• Been working on the same engine code base since late 2016
• Implemented full rendering backends in OpenGL 2/3/4, Direct3D 11/12 and Vulkan
• Using RenderDoc very regularly, resorting to PIX and Nsight when needed
• Used shared memory to speed up compute shaders
• Used SSE/AVX intrisics for various projects

CPMA and CNQ3

CPMA, my all-time favorite video game, is a competitive mod for Quake III Arena that first shipped in 2000 and CNQ3 is the official engine for it. It first shipped in 2006.

I have taken over their development in late 2016 with the blessing of their past two project leaders. Many bug fixes and improvements have made it in since, such as:

• Better platform code for Windows/Linux/FreeBSD
• New renderer features and performance improvements (better mip-maps, dithering, depth fade, ...)
• New tools for level designers (shader trace, shader editor, ...)
• Asynchronous map downloads via HTTP
• New demo playback system with full rewind support
• Console help and auto-completion
• Robust crash handling and reporting that includes virtual machine stack traces and restores system settings reliably (e.g. global timer frequency)
• Much faster Huffman decompression
• A high-quality image resampler for non-POT textures using SSE2

CNQ3 Links

• Demonstration video of CNQ3's performance and new tools in the Direct3D12 branch:
  https://www.youtube.com/watch?v=3588oZbd1vA

• CPMA and CNQ3's official website:
  https://www.playmorepromode.com/

• Source code of CNQ3's Direct3D 12 branch:
  https://bitbucket.org/CPMADevs/cnq3/src/r_d3d12/

• General-purpose image rescaling using SSE2 intrinsics:
  https://bitbucket.org/CPMADevs/cnq3/src/master/code/renderer/tr_image_scale.cpp

• Asynchronous HTTP downloads from scratch:
  https://bitbucket.org/CPMADevs/cnq3/src/master/code/client/cl_download.cpp

• New demo (a.k.a. replay) playback system with full rewind support
  https://bitbucket.org/CPMADevs/cnq3/src/master/code/client/cl_demo.cpp

• Robust crash handling and reporting
  https://bitbucket.org/CPMADevs/cnq3/src/master/code/win32/win_exception.cpp

Misc. Links

• Fast Huffman (de)compression and bit stream buffer range checks for demo files:
  https://github.com/mightycow/uberdemotools/blob/develop/UDT_DLL/src/message.cpp

• Slug font rendering, CPU and GPU:
  https://github.com/mightycow/Sluggish

• GitHub:
  https://github.com/mightycow

• BitBucket:
  https://bitbucket.org/CPMADevs/