Ed94 / HandmadeHero

My journey through the series

HandmadeHero

Any code I do for this series will be here.

(Only original hand-written code will be here, no code from the series itself)

Scripts

• build.ps1 - Builds the project use .\scripts\build msvc <args> <module> or .\scripts\build clang <args> <module>
  • debug adds debug symbols, etc
  • dev for development builds. (automatically adds debug)
  • optimize for optimized builds.
  • verbose gives more info on arguments passed to tools, etc.
  • module is the module to build, can be any of platform or engine for this point in the codebase. (Eventually game will also be a separate module)
• clean.ps1 - Cleans the project
• update_deps.ps1 - Updates the project dependencies to their latest from their respective repos.

Make sure to run update_deps.ps1 before building for the first time.

Notes

Building requires msvc or llvm's clang + lld, and powershell 7

The build is done in the following stages (if clean build):

1. Build engine module
   1. Build and run pre-build metaprogram: engine_gen.cpp
   2. Build engine module dll.
   3. Build and run post-build metaprogram to generate engine symbol constants.
2. Build platform module
   1. Build and run pre-build metaprogram.
   2. Build platform module as executable

The final build order should have an additional game module: handmade, that will be dependent on the engine and platform modules.

Milestone

Day 49 : Debugging Canonical Coordinatescl

Features Done so far:

• Tailor made build system via powershell scripts
  • Supports building the repo with msvc or clang
  • Will only build a module if it detects changes (md5 is cached)
    • Check is rudimentary can cannot detect all changes (headers for the most part)
    • Any changes to target should require a clean rebuild.
  • Can stage codegen metaprograms to run before building the module
    • Will automatically not run if app process is found (for engine module).
    • Metaprogramming library used was self-made from scratch: gencpp
  • Can emit exported mangled symbols for the engine module for hot-reload with the platform module without needing to use C linkage symbols or a complex hot-reload library (Live++, etc).
  • Project builds in less than 5 seconds. (Most of it is taken up by the metaprogramming library)
• Platform Layer:
  • Block Memory allocation via VirtualAlloc for engine module
  • Memory mapped files for engine & game snapshots.
  • Instantaneous hot reload of engine module
  • Software rendering via Win32 GDI
  • Direct Sound audio
  • Keyboard & Mouse Input via GetAsyncKeyState & Win32 window messagng
  • XInput controller support
  • Dualsense controller support via joyshock library
  • Fullscreen toggle
    • Can't change refresh rate
  • Auto-hide cursor in client region (painted surface), not using editor tools
• Engine Layer:
  • Take & load snapshots of either the engine's or game's memory state.
    • Allows for engine or game state to be restored even if a crash occurs to exact memory state it was before.
  • Basic input abstraction into hard-coded actions (``EngineActions&PlayerActions`)
  • Record & replay input.
  • WIP : 2.5D Tile Map
    • Virtualized into chunks
    • Some basic collision detection & math (pre-math coverage by Casey)
  • Bitmap file loading
    • Compression mode 3
    • Basic rendering
      • Linear alpha blending
      • Anchored to center position
  • Experimental type sytem for physics vectors.
  • Basic local co-op support
    • Each player can be assigned a controller
    • So far only support for two players
  • Camera assignable to follow arbitary entity

Gallery