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fix: Spline snap points and TextStyle backward/upside-down rendering

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Spline entities now expose fit_points (or control_points when no fit
points are defined) as key_vertices, enabling Endpoint and Midpoint
snap to reach spline construction points.

TextStyle is_backward flag is applied by negating the width_factor,
producing horizontally mirrored text. is_upside_down rotates the text
180°. Both tessellate_text_ex and text_local_bounds now handle negative
width_factor without clamping it to zero.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-04-26 22:10:32 +03:00
commit 5216c247c2
4 changed files with 37 additions and 10 deletions
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19
src/entities/text.rs
View file

@ -54,12 +54,17 @@ fn to_truck(t: &Text, document: &acadrust::CadDocument) -> TruckEntity {
);
let resolved_style = resolve_text_style(&t.style, document);
let font_name = resolved_style.font_name;
let width_factor = (if t.width_factor > 0.0 {
t.width_factor as f32
} else {
1.0
} * resolved_style.width_factor.max(0.01))
let base_wf = (if t.width_factor > 0.0 { t.width_factor as f32 } else { 1.0 }
* resolved_style.width_factor.max(0.01))
.clamp(0.01, 100.0);
// is_backward mirrors text left-right via negative width factor.
let width_factor = if resolved_style.is_backward { -base_wf } else { base_wf };
// is_upside_down rotates 180° around the insertion point.
let rotation = if resolved_style.is_upside_down {
t.rotation as f32 + std::f32::consts::PI
} else {
t.rotation as f32
};
let oblique_angle = t.oblique_angle as f32 + resolved_style.oblique_angle;
let anchor = match (
&t.horizontal_alignment,
@ -96,7 +101,7 @@ fn to_truck(t: &Text, document: &acadrust::CadDocument) -> TruckEntity {
} else {
(0.0, 0.0)
};
let (cos_r, sin_r) = ((t.rotation as f32).cos(), (t.rotation as f32).sin());
let (cos_r, sin_r) = (rotation.cos(), rotation.sin());
let origin = [
anchor[0] - (anchor_local_x * cos_r - anchor_local_y * sin_r),
anchor[1] - (anchor_local_x * sin_r + anchor_local_y * cos_r),
@ -105,7 +110,7 @@ fn to_truck(t: &Text, document: &acadrust::CadDocument) -> TruckEntity {
let strokes_2d = cxf::tessellate_text_ex(
origin,
t.height as f32,
t.rotation as f32,
rotation,
width_factor,
oblique_angle,
&font_name,