motordevs editor docs2D FEA geometry editor — specification reference

Behaviour-first feature specs. What every primitive, constraint, modify operation, and workflow actually does.

10 primitive specs

Node, Segment, Arc, Circle, Spline, Rectangle, Polygon, Fillet, Crossing, Frame — each fully defines state machine, committed state, accepted constraints, failure modes.

Start with Node

18 constraint kinds

12 geometric (horizontal, vertical, tangent, …) + 6 dimensional (distance, angle, radius, …) — each with TS and WASM solver math, palette, MotorScript signature, and known caveats.

Geometric constraints

6 modify operations

Move, Rotate, Mirror, Copy + Array, Trim, Delete — including the cascade behaviour across fillets, crossings, and feature records.

Modify ops

4 workflow specs

MotorScript DSL, parameters + smart dimensions, save/load/tabs, selection + snapping + palette UX.

MotorScript

About this site

This site is the behaviour specification for the 2D FEA geometry editor that ships at motordevs.com/app. Every primitive, constraint, modify operation, and workflow feature has a dedicated spec under /spec describing what it does, how the user invokes it, what state it commits, which constraints it interacts with, and how it fails.