doy-lee // TODO: Doyle T.

My personal standard library used in personal projects that focuses on simplicity, transparent data structures void of crazy C++ features with minimal dependencies on the standard libraries. The library is orientated around avoiding unnecessary allocations e.g. minimal calls to malloc and non-pessimized implementations.

• Custom memory routines: arena allocator, virtual memory containers, TLS scratch allocators
• Allocation-less string slices and string manipulation routines
• Linear probed and chained hash tables in 400~ LOC
• Fixed sized arrays and strings containers

intc is a port of calccrypto's uint128/256 library into a single header file library to allow u128/256 calculations. This port is primarily C first and provides C++ helpers like operator overloads that are opt in.

Raylib is a game-engine by Raysan5 whose main focus is to make game engine programming simple and enjoyable. In this project, I rewrote the software-rendering routine to use SSE2/3 instructions to attain the expected 4x speed-up by taking advantage of data-parallelism offered by SIMD.

DTRenderer is an attempt to build a simple software renderer from the ground up. The main goal is to build an intuitive understanding of graphics mathematics, rendering pipeline and core concepts. It runs as a Win32 program with minimal dependencies.

• 2D Software Rendering
• Alpha Blending
• Bilinear Filtering
• Correct Color Space Pipeline (SRGB <-> Linear)
• Rasterisation
• Texture Mapping
• Translation, Rotation, Scale
• 3D Software Rendering
• Full Bright, Flat, Gouraud Shading
• Orthogaphic, Perspective Projections
• Translation Rotation Scale
• Custom Wavefront Obj Loader (minimal subset)
• Hot Reloadable DLL for Renderer Code (taken from Handmade Hero)

Math Masher is a cross-platform mobile app that aims to teach basic arithmetic skills including addition, subtraction and multiplication by gamifying the learning experience. The app was developed in a team using the Cocos2DX framework in C++. My role in the project is as the lead developer and assisting role with asset design.

• Project management (Trello, minutes meeting, code review etc.)
• Game engine architecture (Gameplay, UI, shopping mechanics, debug)
• Basic sound editing (Compressor, EQuing, normalisation)
• Asset designs (Creating graphical assets with Photoshop)

DCHIP8 aims to emulate the CHIP8 architecture to better understand at a lower level operations between memory, cpu, input and output.

• Fetch, Decode, Execute Opcodes
• Modelling memory, registers and basic CPU architecture
• Software Rendering and interaction with Win32
• Minimal dependencies, single file executable

Dengine is a solo project, 2D game engine developed with OpenGL and low-level libraries in C. The main goal of Dengine is to facilitate learning from many aspects of Computer Science. Alongside Dengine, Asteroids is being built which guides the development of features for the game. Dengine is inspired by Handmade Hero, with a focus on developing as many features with minimal libraries, such that it is not too time-consuming and counter-productive to do so.

• Asset Management (load data into intermediate representations)
• Audio API from OpenAL
• Basic 2D Game Mathematics/Physics (Vector, Trig, Explicit Euler)
• Collision Detection (Single Axis Theorem, Minkowski Sum/Diff, AABB)
• Debug Services & Displays
• Entity Component Systems
• IMGUI Systems
• Input Parsing
• Push-Buffer Memory Systems
• Small Size Array Optimisations
• Standard Library Replacements (e.g. atoi, strlen, itoa, string)
• Texture Atlas Support, Runtime Font Packing
• OpenGL 2D Rendering Pipeline & Batching Render Calls