easyTrace/docs/architecture.md

TraceCad Architecture

TraceCad is split into small .NET projects with one-way dependencies.

TraceCad.App    -> TraceCad.Core, TraceCad.Dxf
TraceCad.Dxf    -> TraceCad.Core
TraceCad.Vision -> TraceCad.Core
TraceCad.Core   -> no UI, OpenCV, or DXF package dependencies

Coordinate Spaces

• Model space: millimetres, used for all stored CAD geometry.
• View space: screen pixels, used only by the Avalonia canvas.
• Export space: millimetres, mapped directly to DXF output.
• Reference space: reserved for calibrated background images in later phases.

MVP Boundaries

MVP 0.1 intentionally excludes OpenCV, marker detection, automatic tracing, constraints, and dimensions. The first implementation proves deterministic CAD entity creation and DXF export.