- Line: endpoint grips expose Stretch + Lengthen; midpoint exposes
Stretch only.
- Arc: endpoint exposes Stretch + Lengthen; midpoint exposes
Stretch + Radius + Arc Length; centre exposes Stretch.
- Dimension text grip exposes the full text-position vocabulary
(Move with Dim Line / with Leader / Independent, Reset Text,
Rotate Text, Above Dim Line, Center). Dim-line-position grip
exposes Stretch + Reverse Arrows. Extension origins keep the
default Stretch.
- Each affected entity drops `impl_entity_basics!` and writes the
three trait impls (Grippable, PropertyEditable, Transformable)
manually so `grip_menu` / `apply_grip_menu` can override.
- `apply_grip_menu` handles Reset Text (clear text override) and
Center (snap text to midpoint of extension origins) inline;
remaining actions stub to no-op pending the follow-up
prompt / drag plumbing.
Phase 1 of bringing the grip vocabulary in line with the standard
CAD convention: drop the per-position-type shape encoding (Diamond
for translate, Circle for parameter) and use a plain square for
every endpoint / vertex / centre grip. The behavioural midpoint vs
vertex distinction stays — it lives on `GripDef::is_midpoint` and
drives `Translate` vs `Absolute` in the grip-edit dispatcher — only
the marker shape collapses.
- `GripShape` keeps `Square`, `Rectangle`, `Triangle`. Diamond /
Circle are gone.
- `GripDef` gains `dir: Option<[f32; 2]>` — a world-XY direction
vector consumed by `Rectangle` to orient the box along its
segment.
- `entities::common` exposes `square_grip`, `center_grip` (same
square marker, flagged as translate), `rectangle_grip(id, world,
dir)` for oriented mid-segment handles, and a kept-for-Phase-2
`triangle_grip`.
- `overlay::GripMarker` / `grips_to_screen[_paper]` thread `dir`
through to the canvas painter; the Rectangle path rotates the
box around the grip centre using the world-XY direction (flipping
the sin for screen-Y).
Every existing `diamond_grip(id, w)` call becomes `center_grip(id,
w)` — the visual change is square-replacing-diamond at line
midpoints / arc midpoints / circle centres / ellipse centres /
viewport / hatch loop centroids / dimension grips / image corners /
multileader / ray / underlay / ole2frame / solid3d.
`LwPolyline` grows a stretch handle on every segment (straight or
arc), drawn as the new oriented rectangle. The grip-edit path
translates both segment endpoints for straight segments and
adjusts the arc bulge from the new midpoint for arc segments.
Each entity's tessellation now lives alongside its definition in
entities/*.rs, attached to the entity type via a local trait:
LegacyTess — Viewport / Insert / Hatch / Ole2Frame
(fallback path for entities not on the truck pipeline)
LeaderTess — Leader
MultiLeaderTess — MultiLeader
DimensionTess — Dimension (carries its dim-only helpers too:
~1700 lines of dim_geometry, dim_text_*, format_*,
tolerance, suppression, etc.)
scene/tessellate.rs keeps only the cross-entity dispatcher plus the
shared dim machinery reused by leader/multileader/dimension
(ArrowKind, DimGeom, append_arrow, arrow_from_block, add_segment,
add_polyline, normalized_or, push_tri, color_or_inherit, entity_z,
offset_snap_pts). Cross-entity arc helpers + aci_to_rgba moved to
scene/tess_util.rs.
scene/tessellate.rs shrinks from ~3300 to 809 lines. Compile clean,
all 9 tests pass.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Linear/Aligned: first point, second point, definition point, text position
Radius/Diameter: center (angle_vertex), radius point, text position
Angular2Ln/Angular3Pt: vertex, two extension points, arc def point, text
Ordinate: origin, feature location, leader endpoint, text position
Text position grip shared across all types; measurement recalculated after edit.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Hakan Seven