Open-source alternatives to Learn OpenGLES Tutorials

Tinyrenderer is a C++ library designed as an educational tool for building a 3D graphics pipeline from scratch. It provides a software-defined rendering environment that executes all geometric transformations and rasterization tasks on the central processor, intentionally avoiding reliance on external hardware acceleration or graphics libraries. The project serves as a pedagogical resource for understanding the fundamental mathematical principles of computer graphics. It enables users to implement custom shader pipelines and core rendering techniques, such as barycentric coordinate calculatio

This project is an open-source 3D game engine designed for building high-fidelity games, simulations, and cinematic environments. It functions as a robotics simulation platform with native integration for ROS 2 to model robot controllers and sensors. The engine features a multi-threaded Forward+ physically based renderer that supports hardware-accelerated ray tracing and global illumination. The system is built on a modular extension architecture using Gems to add or replace features without modifying core binaries. It includes a native SDK for AWS cloud integration, enabling IAM authenticati

This project is a cross-platform graphics and compute framework that provides a unified, hardware-agnostic abstraction layer for rendering and parallel processing. It enables developers to build high-performance applications that execute consistently across diverse operating systems and hardware backends, including Vulkan, Metal, and DirectX. By mapping high-level graphics commands to native APIs, it serves as a portable foundation for both real-time 3D rendering and general-purpose GPU computing. The framework distinguishes itself through a robust architecture that supports both native deskt

This repository is a comprehensive collection of functional 2D and 3D demo projects and implementation samples for the Godot Game Engine. It serves as an interactive tutorial and reference library, providing a working codebase to demonstrate how to apply engine features in real-world scenarios. The collection focuses on practical implementation guides, covering a wide array of technical capabilities from basic engine fundamentals to advanced rendering and scripting techniques. It allows users to study the application of node-based composition, asset pipelines, and game logic through direct ex

This project is a collection of programming language references and syntax cheat sheets designed for rapid developer onboarding. It serves as a library of code-based documentation that uses valid source code files to provide whirlwind tours of various language specifications. The project focuses on programming language learning by providing concise, commented code examples that explain core features and syntax in place. This approach enables developers to quickly grasp language-specific patterns, data types, and execution flow through a consistent reference format. The content covers a broad

melonDS is an open-source emulator that runs original Nintendo DS and DSi games on modern operating systems with high-accuracy hardware simulation. It emulates the DS and DSi CPUs, video, and audio systems, and supports booting from original system firmware for access to the system menu and configuration screens. The emulator distinguishes itself through cycle-accurate component simulation for precise timing and compatibility, a JIT dynamic recompilation engine that translates game code to native x86_64 or AArch64 instructions for faster performance, and OpenGL hardware-accelerated rendering

android-gpuimage is an OpenGL image processing library for Android that provides a GPU-powered framework for applying real-time shaders, blending layers, and processing live video streams. It functions as a real-time video filter and image blending engine to modify the luminance, vibrance, and geometry of visual content. The library enables the application of graphical effects to both static photos and live camera feeds. It supports complex image transformations, including the merging of multiple image layers through various blending modes. Capabilities cover a broad range of image manipulat

The Go Mobile project is a framework and toolchain that enables Go developers to build native mobile applications for Android and iOS entirely in Go, or to compile Go packages into shared libraries that can be called from existing native mobile apps. It provides a complete set of libraries for handling mobile app lifecycle events, rendering 2D and 3D graphics through OpenGL ES, accessing device sensors like accelerometers and gyroscopes, processing touch and keyboard input, playing audio via OpenAL Soft, and reading bundled application assets. The project distinguishes itself by offering two

This project is a collection of practical implementation examples and demonstrations for building mobile applications using a JavaScript-based native framework. It serves as a cross-platform mobile framework demo, providing a gallery of interactive interface patterns and native integration suites. The repository showcases specialized capabilities including high-performance 2D and 3D visual content through OpenGL graphics implementation. It also features a suite of native hardware integrations, covering biometric authentication via fingerprint scanning and gesture-based unlock patterns. The p

rawdrawandroid is a framework for building Android applications using C and Make. It provides a native development system that compiles source code into standalone executable packages, bypassing the standard Java or Kotlin toolchains and virtual machines. The project features a native UI toolkit for creating hardware-accelerated graphics windows and a dedicated hardware interface for direct communication with USB peripherals and onboard sensors. It utilizes a containerized build environment to ensure consistent compilation and signing of binaries without requiring local toolchain installation

LÖVE is a cross-platform game engine and framework for developing two-dimensional games using the Lua programming language. It provides a 2D graphics API for rendering shapes, images, and sprites across multiple desktop and mobile platforms. The framework enables the development of a single codebase that can be deployed to Windows, macOS, Linux, Android, and iOS. It utilizes a Lua-based scripting interface to control internal engine systems. The project covers 2D game development, mobile game development, and cross-platform game deployment.

Haxe is a statically typed, multi-target programming language and open-source compiler toolkit that translates a single codebase into native executables and scripts for JavaScript, C++, C#, Java, Python, Lua, PHP, and Flash targets. It provides a unified type system with automatic type inference, a compile-time macro system for code transformation and generation, conditional compilation directives, and a static analysis engine that enforces null safety and eliminates dead code to produce smaller, safer outputs. The language is supported by the HashLink virtual machine, which executes platform

SHADERed is a cross-platform shader development environment and debugger used for authoring vertex, pixel, and compute shaders. It functions as an integrated editor for writing and compiling shader code while providing live visual previews and the ability to configure render pipeline states. The tool features a GLSL shader debugger that enables line-by-line execution with breakpoints and variable watches to resolve visual logic errors. It includes a shader asset manager for importing 3D models and textures as data inputs and supports an extensible plugin system to integrate new languages and

MMPose is a PyTorch-based pose estimation toolbox and deep learning training pipeline designed for detecting 2D and 3D keypoints on humans, animals, and faces. It serves as a computer vision model zoo and a framework for both 2D pose estimation and 3D pose lifting. The project is distinguished by its modular architecture and extensibility, employing a registry-based system and hierarchical configurations to allow for custom algorithm integration and model pipeline customization. It supports diverse estimation paradigms, including top-down, bottom-up, and two-stage pose lifting workflows. The

Butterfly is an interactive graph visualization library and SVG-based diagramming engine used to build node-based workflow designers and visual flow editors. It provides a framework for rendering interconnected nodes, edges, and groups to model technical architectures, business processes, and data-driven workflows. The project is distinguished by its ability to integrate custom UI components as graph nodes and its specialized support for data lineage visualization. It enables the mapping of relationships between data fields, tables, and business entities to track provenance and monitor workfl

This project is a technical guide and implementation library for advanced visual effects and hardware-accelerated animations using the Core Animation framework on iOS. It provides a comprehensive reference for creating high-performance motion graphics, custom graphic rendering, and the construction of 3D engines using perspective transforms and Z-axis manipulation. The collection distinguishes itself through a deep focus on GPU rendering optimization and graphics performance. It covers advanced strategies to maintain high frame rates, such as reducing offscreen rendering via shadow path optim

Sodium is a graphics optimization mod for the Fabric loader that replaces the standard rendering engine in Minecraft. Its primary purpose is to increase frame rates and reduce micro-stutter by implementing a high-performance rendering replacement for the game client. The project focuses on improving visual stability and game fluidity through a technical modification of the rendering pipeline. This includes a system for correcting graphical glitches and visual artifacts to ensure a consistent image across different display environments. The mod implements low-level rendering optimizations suc

Pixel is a 2D game library and graphics engine for the Go programming language. It provides a hardware-accelerated renderer for drawing sprites, geometric shapes, and text, utilizing an optimized system of batching and transformation matrices. The project functions as a comprehensive toolkit for two-dimensional interactive applications, combining a graphics engine with a 2D vector math library for affine transformations and coordinate space projections. It includes a dedicated input manager that tracks keyboard presses and mouse movements using a polling-based system rather than asynchronous

gg is a Go 2D graphics library and vector graphics engine designed for programmatic image generation. It provides a canvas rendering API to create custom 2D shapes, paths, and visual assets, which can be exported as PNG and JPG files. The toolkit enables the construction of complex geometry using Bezier curves and custom paths. It supports a variety of rendering operations, including filling and stroking paths, applying linear and radial gradients, and utilizing surface patterns. The library covers a broad range of capabilities, including text rendering with word wrapping and dimension measu

DGElasticPullToRefresh is a Swift pull-to-refresh component for iOS that provides a bouncy, elastic animation effect for scrolling lists. It serves as a specialized table view extension that triggers content updates via a downward swipe gesture. The component uses bezier paths and spring physics to render curved visual elements, simulating a flexible stretching effect during user interaction. This physics-based approach governs the movement and bounce of the interface to create a fluid feel. The system manages gesture-driven states and coordinate transformations to shift the view hierarchy.

This project is a digital technical reference and textbook source focused on graphics programming. It consists of a collection of low-level graphics programming guides provided as Markdown source files designed for digital distribution and study. The project utilizes a Markdown ebook build pipeline to transform source text into HTML5, EPUB3, and Mobi formats. This process leverages Pandoc to convert structured technical documents into standardized digital reading formats through a sequential processing pipeline. The system covers technical document formatting and digital textbook distributio

Leafer UI is a high-performance HTML5 canvas rendering engine and 2D vector graphics library. It utilizes a hierarchical scene tree to manage shapes, paths, and text, providing a toolkit for building interactive canvas applications and expansive infinite canvases. The engine is designed as a cross-platform canvas toolkit that decouples core logic from the drawing API, allowing it to run across web, mobile, server, and mini-program environments. It distinguishes itself by providing specialized tools for interactive graphic editor development, including hit detection, event bubbling, and transf

VulkanTutorial is a comprehensive educational guide and instructional resource for implementing low-level rendering and compute pipelines using the Vulkan API. It serves as a GPU programming course and a step-by-step guide for building high-performance graphics applications from scratch. The project provides detailed instruction on the full graphics pipeline, including the compilation of shaders to SPIR-V bytecode, the configuration of rasterization states, and the implementation of 3D graphics pipelines. It also covers general-purpose GPU compute programming, focusing on the execution of par

SensorsCalibration is a toolkit for computing the intrinsic and extrinsic parameters of cameras and LiDAR sensors in automotive environments. It provides tools for calculating internal camera focal properties, aligning LiDAR point clouds to 2D camera images, and determining the spatial transformations between multiple sensors and the vehicle coordinate system. The project includes a targetless calibration framework that aligns sensors to a vehicle by analyzing natural features in road environments without the need for specialized physical markers. It also supports factory calibration processe

ImageSharp is a .NET image processing library and manipulation framework used for decoding, encoding, and modifying digital images. It functions as a comprehensive toolkit for resizing, cropping, and applying pixel-level filters while managing color profiles and pixel data across various file formats. The project integrates a 2D vector graphics engine and a typography rendering engine to draw geometric shapes, paths, and complex stylized text onto images. It also includes a geometry boolean operation library for calculating intersections, unions, and differences between complex polygons and c

Trois is a declarative 3D scene manager and a Three.js component library for Vue 3. It acts as a reactive wrapper that maps Three.js scene graphs and materials to a Vue component tree, allowing for the creation of web-based 3D renderers using HTML-like templates. The project synchronizes a reactive component tree with a 3D scene graph through proxy-based state binding and reactive property mapping. It features a component-based scene graph that manages spatial transformations and object lifetimes, integrating a requestAnimationFrame loop with component lifecycle events. The library covers a

Renderer is a low-level software graphics engine implemented in standard C for educational and experimental real-time computer graphics. It functions as a CPU rasterizer that computes vertex transformations, clipping, texturing, and lighting entirely through software computation without requiring hardware acceleration. The software includes a geometry pipeline supporting depth and alpha testing, geometry clipping and culling, and perspective-correct attribute interpolation. Its lighting and shading subsystem provides advanced physical simulation including metallic-roughness and specular-gloss