Here is a list of all files with brief descriptions:

AbstractParticleSystem.cpp
AbstractParticleSystem.h	Base interface and minimal GL pipeline for point‑sprite particle systems
bmp.cpp
bmp.h	Minimal BMP I/O utilities and a region blit helper
Camera.h	Minimal FPS-style camera with yaw/pitch look and WASD-style motion
ColorConversion.h	Color space conversion helpers among RGB/HSV/HSL/CMY/CMYK/YUV
FontRenderer.cpp
FontRenderer.h	Bitmap font utilities: CPU-side text rasterization and an OpenGL font engine
GLApp.cpp
GLApp.h	Minimal application framework for running OpenGL or WebGL demos
GLAppKeyTranslation.h	Cross‑platform key/mouse translation layer for GLFW vs. Emscripten
GLArray.cpp
GLArray.h	RAII wrapper for an OpenGL Vertex Array Object (VAO)
GLBuffer.cpp
GLBuffer.h	Thin RAII wrapper for an OpenGL buffer object with upload/binding helpers
GLDebug.cpp
GLDebug.h	Minimal OpenGL error utilities, exception type, and a debug GL() wrapper macro
GLDepthBuffer.cpp
GLDepthBuffer.h	RAII wrapper for an OpenGL depth renderbuffer (GL_RENDERBUFFER)
GLDepthTexture.h	RAII wrapper for a 2D OpenGL depth texture with compare mode enabled
GLEnv.cpp
GLEnv.h	Cross‑platform OpenGL window/context helper for desktop and Emscripten
GLFramebuffer.cpp
GLFramebuffer.h	Convenience RAII wrapper for an OpenGL framebuffer object (FBO)
GLProgram.cpp
GLProgram.h	RAII wrapper around an OpenGL shader program with rich uniform/texture setters
GLTexture1D.cpp
GLTexture1D.h	Thin RAII wrapper for an OpenGL 1D texture
GLTexture2D.cpp
GLTexture2D.h	RAII wrapper for an OpenGL 2D texture with byte/half/float upload helpers
GLTexture3D.cpp
GLTexture3D.h	RAII wrapper for an OpenGL 3D texture with byte/float upload helpers
GLTextureCube.cpp
GLTextureCube.h	RAII wrapper for an OpenGL cube map texture with byte/half/float uploads
Grid2D.cpp
Grid2D.h	2D scalar grid (float) with sampling, arithmetic, SDF, and I/O helpers
helvetica_neue.inc
Image.cpp
Image.h	Lightweight image container with basic processing utilities
ImageLoader.cpp
ImageLoader.h	Thin wrapper around stb_image to load common raster formats into Image
Mat3.h	3×3 matrix template for rotations, scaling, and basic linear algebra
Mat4.h	4×4 matrix template for 3D transformations, projections, and stereo sets
OBJFile.cpp
OBJFile.h	Minimal Wavefront OBJ loader collecting vertices, triangle indices, and normals
Rand.cpp
Rand.h	Simple random number utility wrapping `std::mt19937` with common ranges
stb_image.h
Vec2.h	2D vector template with arithmetic, length utilities, and helpers
Vec3.h	3D vector template with arithmetic, geometry helpers, and RNG utilities
Vec4.h	4D vector template with arithmetic, length helpers, and utilities