Module engine_state 

EngineState — the windowing-agnostic viewer state machine the host UI programs against (R3): scene + camera + controls + settings + emphasis, plus the whole event/command/query surface (run-history feed, pointer/wheel ingestion, camera commands, picking, world→screen, visibility). No GPU, no canvas — the wasm Engine and the winit desktop shell both wrap this; it is fully unit-testable on native.

Everything crosses the R3 boundary as plain JSON/scalars: the host never holds a renderer object, only names, ids, and JSON.

Structs

EngineState

RefSelectState

The modal state of the reference-selection widget while it is ACTIVE: which feature-dialog field is being filled, what it accepts, and the running list of picked kernel names (the source of truth — added by picking in the view, removed via the per-line X). See the ref-select methods below.

SelectionFilter

Which entity KINDS a plain viewport click may select.

SketchConstraintAction

One applicable-constraint palette entry: the glyph passed back to EngineState::sketch_add_constraint plus a human tooltip and a dimensional tag (whether it opens a value the solver seeds from the current measurement).

SketchDrag

One in-flight sketch drag (S2): the grabbed points and the anchor uv. A single entry for a point grab; all of a geometry’s (deduped) points for a geometry grab (a rigid translate). Each point tracks the cursor by an ABSOLUTE orig + (uv - anchor) (never incremental — the solver moves points between frames, so incremental deltas would drift).

SketchEdit

The active engine-native sketch edit — the live session plus the state to restore when sketch mode exits.

SketchEntityRow

One row in a sketch entity-LIST panel (Points / Curves / Constraints) — the display label plus the (kind, id) needed to select / hover / delete it, and its current selected/construction state for row styling. Built by EngineState::sketch_point_rows / sketch_geometry_rows / sketch_constraint_rows; the panel renders them and routes clicks back through EngineState::sketch_select_entity / sketch_hover_entity.

TransformArm

The transform-controls gizmo controller state (see the impl block below).

Enums

GizmoMode

Which of the two gizmos is currently armed for the feature. Transform shows the move/rotate gizmo; Dimension shows the on-canvas draggable dimension annotations (feature-dimensions FD-1). Expanding a feature arms Dimension; the viewport sphere/center toggle flips to Transform and back. The two modes are EXCLUSIVE — the transform gizmo never renders in Dimension mode and vice-versa.