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feat(tess): use angular sampling

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Route curve, hatch, sweep, loft, surface, edge, and isoline tessellation through the shared kernel policy.
This commit is contained in:
Hakan Seven 2026-08-10 12:12:00 +03:00
commit 96be8214f9
21 changed files with 158 additions and 767 deletions
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17
src/entities/common.rs
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@ -670,14 +670,7 @@ pub(crate) fn thick_band_tube(
(fill_tris, lines)
}
/// Build a continuous WCS point list + a per-point FULL band width for a
/// tapered wide polyline, so the wire shader can interpolate each segment's two
/// endpoint widths. Each `verts` entry is `(location_xy, bulge_to_next,
/// start_width, end_width)` — the effective full widths at that vertex's segment
/// start and end (already resolved against the polyline's constant width). Arcs
/// are sampled in 16 steps with the width interpolated linearly along the arc.
/// A shared vertex is emitted once (carrying the previous segment's end width),
/// which is exact for the usual continuous taper.
/// Build a continuous WCS point list and full width for a tapered polyline.
pub(crate) fn tapered_band_points(
verts: &[([f64; 2], f64, f64, f64)],
is_closed: bool,
@ -701,9 +694,10 @@ pub(crate) fn tapered_band_points(
if bulge.abs() < 1e-9 {
push(p1[0], p1[1], ew0 as f32);
} else if let Some(arc) = BulgeArc::from_bulge(p0, p1, bulge) {
for j in 1..=16usize {
let t = j as f64 / 16.0;
let s = arc.sample(t);
let samples = arc.tessellate_angle(acadrust::kernel::tessellation::DEFAULT_ANGLE);
let segments = samples.len().saturating_sub(1).max(1);
for (index, s) in samples.into_iter().enumerate().skip(1) {
let t = index as f64 / segments as f64;
push(s[0], s[1], (sw0 + (ew0 - sw0) * t) as f32);
}
}
@ -792,4 +786,3 @@ pub(crate) fn polyline_segment_fill(
Some(boundary)
}
}