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Exact 3D Delaunay tetrahedralization (Bowyer–Watson, ghost hull, BRIO/Hilbert, verifier) (#14)

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* mesh: exact Bowyer-Watson Delaunay tetrahedralization with ghost tets, BRIO/Hilbert order and a verifier

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

* mesh: Delaunay benchmark, hash-paired cavity faces, mesh.delaunay.points debug command

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

* mesh: simplify Delaunay helpers, share predicates and parsers, halve verifier work

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

---------

Co-authored-by: jyviko <2501648+jyviko@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Irakli KourtisClaude Opus 5.5jyviko
 authored and GitHub committed 2026-10-13 15:56:42 -04:00
1 parent 2b5b47930f
commit 94dc50bb0c
13 files changed
+1508 -17
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crates/mesh/src/quality/mod.rs
+3 -9
View File
@@ -21,14 +21,14 @@
mod bernstein;
pub mod jacobian;
mod report;
mod shape;
pub(crate) mod shape;
use modelcraft_model::{ElementKind, check_coordinates};
pub use jacobian::{JacobianCheck, Validity};
pub use report::{GateOptions, GateReport, MetricStats, QualityReport, enclosed_volume, quality_report, validity_gate, validity_gate_elements};
use crate::predicates::{Point3, Sign, orient3d};
use crate::predicates::{Point3, Sign, tet_volume_sign};
use crate::{Error, Result};
/// A quality metric. Angles are in degrees.
@@ -164,13 +164,7 @@ fn checked(kind: ElementKind, xyz: &[[f64; 3]], p: &[[f64; 3]]) -> Result<(Optio
/// right-hand normal), or `None` when a coordinate is outside the predicates' domain.
fn exact_tet_sign(xyz: &[[f64; 3]]) -> Option<Sign> {
let p = |i: usize| xyz.get(i).and_then(|c| Point3::try_from(*c).ok());
// orient3d(a, b, c, d) is positive when d lies below the plane of a, b, c seen
// counterclockwise, i.e. opposite to our convention.
Some(match orient3d(&p(0)?, &p(1)?, &p(2)?, &p(3)?) {
Sign::Positive => Sign::Negative,
Sign::Negative => Sign::Positive,
Sign::Zero => Sign::Zero,
})
Some(tet_volume_sign(&p(0)?, &p(1)?, &p(2)?, &p(3)?))
}
/// The certified Jacobian check and exact volume of a solid element (tet4, tet10, wedge6, hex8,