Dear ImGui is a production-grade, immediate-mode graphical user interface library for C++. It provides a self-contained core engine (rendering, widgets, tables, fonts, input handling) and a large ecosystem of platform and renderer backends (GLFW, SDL2/3, Win32, Vulkan, DirectX, Metal, OpenGL, WebGPU, etc.) that enable integration into any application with minimal overhead. The architecture is a library with pluggable backends: user code calls ImGui::NewFrame() to build UI, then ImGui::Render() produces draw data consumed by the chosen renderer backend. The repository includes dozens of example applications demonstrating integration with various windowing systems and graphics APIs, as well as utilities like font embedding tools, FreeType rasterizer integration, and a headless backend for testing. It is not a data research project; it is a software library for building tools, debug UIs, and in-game overlays.
This repository provides a reusable, interactive node editor library built on top of Dear ImGui. It is a pure C++ library with a public API that enables embedding a visual node/graph editor into any ImGui-based application. The core implementation handles node and link creation, dragging, selection, zoom/pan, context menus, cut/copy/paste, flow animations, and state serialization via a bundled JSON library. It is not a standalone application but ships with several examples and an application framework (Win32/DirectX11, GLFW/OpenGL) to demonstrate usage. The architecture is modular, with separate components for canvas rendering, bezier math, and JSON serialization, making individual parts reusable in other projects. The repository is well-maintained with active issue triage and recent commits, though it has medium technical drift due to heavy version-conditional code for Dear ImGui compatibility and reliance on some outdated dependencies (DirectX SDK, older stb versions).
ImNodeFlow is a C++ library that provides node-based editor functionality for Dear ImGui applications. It enables developers to create visual programming interfaces with customizable nodes, input/output pins, and bezier curve connections. The library handles all aspects of the node editor including grid management, node rendering, link rendering, user interactions (dragging, clicking, popup menus), and connection logic. The architecture centers around the ImNodeFlow class which manages the infinite grid, nodes, and links. Custom nodes are created by deriving from BaseNode and implementing the draw() method for node content. The system uses a retained-mode approach for nodes and links while leveraging ImGui's immediate-mode rendering for the UI. Key features include zoom/pan support, connection filtering, customizable styling, and popup events for right-click and dropped links. While primarily a UI component library, the repository includes specialized mathematical utilities that could be reused independently. The bezier math implementation for connection rendering and the context wrapper for zoom/pan functionality demonstrate particularly strong encapsulation and could be extracted for use in other projects.