Eidograph: AI Geometry Copilot

Eidograph is dynamic geometry software for precise 2D and 3D construction, math visualization, animation, and export. Its visual canvas and readable geometry code stay in sync: draw with interactive tools, define a construction with a compact language, or combine both. Drag a free point or slide a bound point along a path, and every dependent object updates automatically.

CREATE IN 2D AND 3D
Keep multiple figures together in one project. Plane figures support points, lines, rays, segments, circles, arcs, ellipses, polygons, function plots, intersections, transformations, regions, loci, and construction marks. Solid figures add 3D points, segments, planes, spheres, boxes, prisms, pyramids, surfaces, transformations, and spatial intersections.

DIRECT MANIPULATION WITH PRECISE RULES
- Drag free points anywhere on the canvas
- Slide bound points along segments, circles, curves, and surfaces
- Let derived objects update automatically through the dependency graph
- Use automatic docking to snap points together or bind them to nearby paths
- Edit color, stroke, fill, opacity, labels, arrows, and visibility from object properties
- Switch between Cartesian and polar grids for 2D work
- Orbit, pan, and zoom around 3D constructions

A CONSTRUCTION LANGUAGE BUILT FOR GEOMETRY
Describe figures in plain text with named objects, expressions, functions, reusable definitions, assertions, styles, and animation commands. Create parameters with on-screen sliders, plot functions and surfaces, trace loci, join paths, calculate intersections, and build dependent constructions that remain reproducible.

Clear diagnostics identify the line and location of a problem, suggest corrected commands, and keep valid parts of the figure visible. The searchable command palette and live command registry make the language easier to discover.

ANIMATE AND EXPORT
Turn parameters and bound points into animations, then export a figure as:
- SVG for scalable vector output
- PNG for a high-resolution image
- GIF for an animated construction or 3D camera orbit

Choose the current view, fitted content, or a custom region for 2D exports. Control scale, grid visibility, transparency where supported, duration, and frame rate.

PROJECTS THAT STAY PORTABLE
Save a complete multi-figure project as an .eido file, or save an individual construction as a plain-text script. Open several projects in tabs, organize 2D and 3D figures together, and use undo and redo while editing.

Core construction, editing, saving, and export work locally without an account. Your project files stay under your control.

OPTIONAL AI AND AUTOMATION TOOLS
Connect an OpenAI-compatible, Anthropic, or Google Gemini/Vertex model that you configure to inspect or edit a construction through Eidograph's built-in tools. Installed versions can also expose selected figures to compatible tools over a local MCP server or JSON REST API. You decide which figures are available, and local-network access is optional.

DESIGNED FOR STUDY, EXPLORATION, AND TECHNICAL WORK
Use Eidograph to explore Euclidean constructions, visualize functions, prepare geometry illustrations, experiment with 3D forms, teach relationships, or create deterministic diagrams that can be inspected and reproduced from their source.

The interface is available in English, German, Spanish, French, Simplified Chinese, Traditional Chinese, Portuguese (Portugal), and Portuguese (Brazil).