# Eidograph Documentation

> Official bilingual documentation for Eidograph, a dynamic 2D and 3D geometry application designed for both humans and agents.

Eidograph keeps an interactive canvas and readable Eidolang source synchronized. It is distributed as an installed Windows or Android application; there is no user-facing web edition. Projects use only the current `.eido` package format with manifest `version: 2`.

## English

- [Documentation home](./en/): Product overview and main documentation entry point.
- [Install Eidograph](./en/guide/installation): Install the app through the official store links.
- [Quick start](./en/guide/getting-started): Create, edit, save, and reopen a first construction.
- [Account, free limits, and Pro](./en/guide/account-and-pro): Sign-in, usage limits, purchases, and entitlement refresh.
- [Tablet touch quick start](./en/guide/tablet-quick-start): Touch-first workflow for tablets.
- [Core workflow](./en/usage/basics): Drawing, files, export, settings, and the in-app Agent.
- [Projects, figures, and files](./en/usage/projects-and-files): Project structure, `.eido` files, drag-and-drop import, and saving.
- [Object editing and command palette](./en/usage/editing-objects): Properties, selection, undo and redo, and commands.
- [Parameters, animation, and GIF/MP4 export](./en/usage/animation-and-export): Animate parameters and staged presentations.
- [3D camera and solid export](./en/usage/solid-3d): Navigate solid figures and understand export behavior.
- [Settings reference](./en/usage/settings): Complete application and project settings.
- [Drawing components](./en/components/overview): Plane and solid drawing component overview.
- [Eidolang language reference](./en/eidolang/reference): Current Eidolang syntax, expressions, commands, and examples.
- [Basic examples](./en/examples/): Downloadable `.eido` projects with editable Eidolang source.
- [Animation examples](./en/examples/animations): 28 single-figure `.eido` projects that animate one geometric result each.
- [Function and equation graphs](./en/examples/functions): 22 single-figure `.eido` projects that animate function plots, implicit equations, parametric and polar curves.
- [Agent integration](./en/agents/integration): In-app Agent providers, MCP, and REST API integration.
- [REST API Reference](./en/agents/rest-api): Endpoints, security, tool schemas, responses, exports, and complete client examples.
- [FAQ](./en/faq): Common questions and troubleshooting.

## 中文

- [文档首页](./): 产品概览与文档主入口。
- [安装 Eidograph](./guide/installation)：通过官方应用商店入口安装。
- [快速上手](./guide/getting-started)：创建、编辑、保存并重新打开第一个构造。
- [账户、免费额度与 Pro](./guide/account-and-pro)：登录、使用额度、购买与权益刷新。
- [平板触控快速上手](./guide/tablet-quick-start)：面向平板设备的触控工作流。
- [基础工作流](./usage/basics)：绘图、文件、导出、设置与应用内 Agent。
- [项目、图形与文件](./usage/projects-and-files)：项目结构、`.eido` 文件、拖放导入与保存。
- [对象编辑与命令面板](./usage/editing-objects)：属性、多选、撤销、重做与命令操作。
- [参数、动画与 GIF/MP4 导出](./usage/animation-and-export)：参数动画与分步演示。
- [3D 相机与立体导出](./usage/solid-3d)：立体图形导航与导出行为。
- [设置完整参考](./usage/settings)：应用和当前项目的全部设置。
- [绘图组件](./components/overview)：平面与立体绘图组件概览。
- [Eidolang 语言参考](./eidolang/reference)：当前 Eidolang 语法、表达式、命令与示例。
- [基础示例](./examples/)：包含可编辑 Eidolang 源码的 `.eido` 项目下载。
- [动画示例](./examples/animations)：28 个单图形 `.eido` 项目，每个动画演示一条几何结论。
- [函数与方程图像](./examples/functions)：22 个单图形 `.eido` 项目，演示函数图像、隐式方程、参数曲线与极坐标曲线。
- [Agent 集成](./agents/integration)：应用内 Agent 平台、MCP 与 REST API 集成。
- [REST API 参考](./agents/rest-api)：端点、安全、工具 Schema、响应、导出与完整客户端示例。
- [FAQ](./faq)：常见问题与故障排查。

## Downloadable examples

- [Square and midpoint construction](./downloads/square-abcd-midpoint-pq.eido): Introductory 2D construction.
- [Solid component tour](./downloads/solids-tour.eido): Collection of common 3D objects.
- [Stella octangula](./downloads/stella-octangula.eido): Parameterized compound of two tetrahedra.
- [Sine and cosine surface](./downloads/surface-sincos.eido): Parameterized sampled function surface.
- [Animation set](./en/examples/animations): 28 further `.eido` downloads under `./downloads/animations/`, one animated figure each.
- [Function graph set](./en/examples/functions): 22 further `.eido` downloads under `./downloads/functions/`, one animated function or equation graph each.

## External

- [Eidograph product and store page](https://metaphorprojects.link/eidograph/): Official product overview and installation links.