hobbies

A place to collect and share all my hobby projects.

• build - where the build temporaries are collected
• install - where the build outputs are collected
• projects - The set of projects
  • basal - a core library of utility objects and interfaces.
  • linalg - the core matrix oriented math library
  • linalg-algo - high level math algorithms
  • linalg-utils - a compatibility library for using OpenCV.
  • geometry - the 2D/3D geometry objects
  • noise - A 2D image noise generator, useful in textures or other means
  • fourcc - a small image library
  • neuralnet - a simple NN w/ hidden layers
  • raytrace - a fairly simple raytracer
  • htm - the start of a hierarchical temporal memory system.
  • units_of_measure - mechanism to create types which represent Units of Measure.
  • xmmt - SSE2/AVX512 inline assembly vector and matrix headers. (does not build on ARM64)

Check the README in each folder for it's own progress and issues.

General Design Principles

• All math oriented objects must implement
  • operators == != += -= *= /= + - * / ! in the class or operators namespace as friends
• Must use basal::equals for best float checks
• Consistent use of either read-only members or methods.
• const correctness.
• Must support basal::printable
• Must support friend operator<<
• Use explicit Constructors to prevent unanticipated auto-magic
• Use if constexpr for debugging.
• Always install your header files as read-only!
• Always create your generated source code as read-only!
• Only locally install binaries (install/). These shouldn't pollute your system.

Developing

You can open either the hobbies.code-workspace or the folder itself. VSCode can configure CMake now but you'll need a compiler which supports OpenMP and the Homebrew installation of it.

Building

Due to issues with OpenMP no longer being supported on Apple Clang and GCC not being able to link (can't find libgcrt1.a), LLVM 18 is the currently working compiler.

# Building on Apple Silicon
cmake --preset native-llvm-18
cmake --build build/native-llvm-18

Conan

Conan support has been removed until I have time to read up on Conan 2.0 builds. This will make it hard to build on WSL as that was my preferred method.

Running

While in the hobbies' root, you can run things by pre-pending the LD (DYLD) path.

# Running the NCurses Raytracing Console on Mac
DYLD_LIBRARY_PATH=install/lib:build/projects/raytrace ./build/projects/raytrace/demo_curses -m libworld_example.dylib

Testing Folder

I've added an explicit folder to run tests. You can run them using the testing wrapper script (it will temporarily modify your PATH and LD_LIBRARY_PATH).

# Basic
./testing.sh demo_curses -m world_example
# Advanced (Stereoscopic)
./testing.sh demo_sdl2 -m world_snowman --dims CIF --aaa 128 --separation 2.0

Profiling

There's two ways to run the profiling tools which have been tested on Mac OS.

# This will generate a "testing/profiling.txt" with the top 100 called functions.
./raytrace.sh ... options ...

# This will generate a *-perf.pdf with the details (a call tree with % time spent)
./profile_run.sh

VS Code order of precedence processing

VSCode will take settings in the order of:

• .code-workspace
• .vscode/settings.json
• project/**/.vscode/settings.json

However, all settings have been moved to the workspace file.