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feat: add Node snap points to dimension defpoints

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Dimension measurement origin points (first_point, second_point,
definition_point, angle_vertex, etc.) are now emitted as Node snap
hints so OSNAP Node mode can locate them precisely without relying on
the tessellated geometry wire alone.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-05-02 17:15:41 +03:00
commit 5a7ebbbb38
1 changed files with 23 additions and 1 deletions
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24
src/scene/tessellate.rs
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@ -281,6 +281,8 @@ pub fn tessellate_dimension(
.filter(|p| !(p[0].is_nan() || p[1].is_nan() || p[2].is_nan()))
.collect();
let snap_pts = dimension_snap_pts(dim, world_offset);
let mut wires = vec![WireModel {
name: name.clone(),
points,
@ -290,7 +292,7 @@ pub fn tessellate_dimension(
pattern_length: 0.0,
pattern: [0.0; 8],
line_weight_px,
snap_pts: vec![],
snap_pts,
tangent_geoms: vec![],
key_vertices,
aabb: WireModel::UNBOUNDED_AABB,
@ -956,6 +958,26 @@ fn add_polyline(points: &mut Vec<[f32; 3]>, polyline: &[Vec3]) {
points.extend(polyline.iter().map(|p| [p.x, p.y, p.z]));
}
fn dimension_snap_pts(dim: &Dimension, world_offset: [f64; 3]) -> Vec<(Vec3, SnapHint)> {
let lv = |v: acadrust::types::Vector3| {
Vec3::new(
(v.x - world_offset[0]) as f32,
(v.y - world_offset[1]) as f32,
(v.z - world_offset[2]) as f32,
)
};
let node = |v: acadrust::types::Vector3| (lv(v), SnapHint::Node);
match dim {
Dimension::Linear(d) => vec![node(d.first_point), node(d.second_point), node(d.definition_point)],
Dimension::Aligned(d) => vec![node(d.first_point), node(d.second_point), node(d.definition_point)],
Dimension::Radius(d) => vec![node(d.angle_vertex), node(d.definition_point)],
Dimension::Diameter(d) => vec![node(d.angle_vertex), node(d.definition_point)],
Dimension::Angular2Ln(d) => vec![node(d.angle_vertex), node(d.first_point), node(d.second_point), node(d.definition_point)],
Dimension::Angular3Pt(d) => vec![node(d.angle_vertex), node(d.first_point), node(d.second_point), node(d.definition_point)],
Dimension::Ordinate(d) => vec![node(d.definition_point), node(d.feature_location), node(d.leader_endpoint)],
}
}
fn dimension_text_entity(dim: &Dimension) -> Option<Text> {
let value = dimension_text_value(dim)?;
// Use f64 position directly to avoid f32 round-trip precision loss at large