Toy Box

1 Repositories

In this section, repositories are summarized by programming languages.

1.1 C++

1.1.1 Libraries

https://github.com/Hasenpfote/dualcomplex/

“dualcomplex” is a cross-platform C++ template library that provides operations for dual complex numbers. It can be used as a header-only library and supports C++11 or later.

https://github.com/Hasenpfote/dualquat/

“dualquat” is a cross-platform C++ template library that provides operations on dual quaternions using Eigen. It can be used as a header-only library and supports C++11 and later.

https://github.com/Hasenpfote/plucker/

“plucker” is a cross-platform C++ template library that provides operations on Plücker coordinates of lines. It can be used as a header-only library and supports C++11 and later.

1.1.2 Examples

https://github.com/Hasenpfote/CMakeExamples/

This is a collection of examples that use CMake for each case of a C++ project.

https://github.com/Hasenpfote/CPPExamples/

This is a collection of examples that use C++11.

• BitonicSort

• ComparingFloatingPointNumbers

• ConvertString

• ExpressionTemplate

• HalfPrecisionFloatingPoint

• LUDecomposition

• Logger

• PimplIdiom

• ParseFntFile

• Range

• ServiceLocator

• Singleton

• SpecificInterface

• ThreadPool

• Other

https://github.com/Hasenpfote/cpp_examples/

This is a collection of examples that use C++14 or C++17.

• circular_buffer

Circular buffer implemented using only the standard library.

• stack_resource

A stack memory allocator using only the standard library.

• pubsub_event

This is a Publish-Subscribe messaging model implemented using only the standard library.

• dual

Header-only class template for dual numbers using only the standard library.

https://github.com/Hasenpfote/mark-and-sweep-gc/

This is an example of a simple mark-and-sweep garbage collection using C++.

https://github.com/Hasenpfote/OpenGLExamples/

This is a collection of examples of real-time rendering techniques using OpenGL.

It supports C++11 or later and OpenGL 4.x.

• AdaptiveTerrainTessellation

• BillboardBeam

• Bloom

• Dithering

• KawaseBlur

• LightStreak

• RadialBlur

• ToneMapping

• Other

1.2 Java

1.2.1 Examples

https://github.com/Hasenpfote/RecursiveDimensionalClustering/

This is an example of Recursive Dimensional Clustering, one of the fast algorithms for finding collisions or clusters in a dataset.

1.3 Python

1.3.1 Modules

https://github.com/Hasenpfote/fpq/

This package provides modules for manipulating floating point numbers quantization using NumPy.

https://github.com/Hasenpfote/image_packer/

Pack multiple images of different sizes or formats into one image.

https://github.com/Hasenpfote/malloc_tracer/

This is a debugging tool for tracing malloc that occurs inside a function or class.

https://github.com/Hasenpfote/perfbench/

perfbench measures execution time of code snippets with Timeit and uses Plotly to visualize the results.

1.3.2 Examples

https://github.com/Hasenpfote/python-poetry-example/

A simple example of how to use pyenv + poetry + tox + pytest.

https://github.com/Hasenpfote/quaternion/

This package provides a class for manipulating quaternion objects.

2 Code snippets

This section summarizes code snippets by themes/topics.

2.1 Mathematics

Topic	Links		Language / Libraries
Complex number	Representation and interpolation of rotations		C++
Geometry	Delaunay triangulation		Python
	Normal vectors to a 2D curve		Python - matplotlib - numpy - sympy
	Normal vectors to a surface		Python - matplotlib - numpy - sympy
Analysis	Taylor series		Python - matplotlib - numpy - sympy
Vector calculus	Laplacian (utils)		Python - matplotlib - numpy
	Frenet–Serret formulas in 2D		Python - matplotlib - numpy - sympy
	Frenet–Serret formulas		Python - matplotlib - numpy - sympy
Set theory	Pairing function		Python - matplotlib - numpy
Probability theory	Inverse transform sampling		Python - matplotlib - numpy
	Monte Carlo Integration		Python - matplotlib - numpy - scipy

2.2 Physics

Topic	Links		Language / Libraries
Rigid body dynamics	Translational and rotational motions		Python - numpy
	Translational and rotational motions (using quaternion)		Python - numpy

2.3 Computer science

Topic	Links		Language / Libraries
Floating point number	Floating-point comparison		C++
Color	CIE1931_color_space CIE_daylight_components, BabelColor_spectral_data		Python - matplotlib - numpy - pandas - scipy
Noise	Perlin noise - 1D/2D/3D/4D		Python - matplotlib - numpy
Sort	Bitonic sort		C++
Russian Roulette	Thoughts on Russian Roulette		Python - altair - numpy - pandas
k-d tree	Thoughts on k-d tree		Python - matplotlib - numpy - anytree

2.4 Python

Topic	Links
Python	How to limit concurrency with asyncio
	How to hook properties with Python3 dataclasses
matplotlib	Customized colormap
	Discrete colormap
pytorch	Differential
	Confusion matrix