forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
3587b0de74
`fieldcraft_mesh::octree::octree_hex_mesh` meshes any closed part with hex8 only: - an adaptive 3-refinement grid (27-tree) with strong balance and closure, filled with conforming node-marking transition templates (Schneiders; checked over all 48 symmetries); - a core of grid cells kept clear of the boundary (the HybridOctree buffer rule), with non-manifold cleanup and a genus check against the part; - a feature graph from the B-rep (corners, curves, patches) and a partition-first map of the core's boundary onto it, then two boundary layers: a padding layer and a pillow per patch, so every face boundary and sharp edge is captured by element edges; - a Garanzha-type untangling and fitting energy (shape term |J|^3/chi, a volume term and a soft fitting term, deterministic across platforms), a compass search on the worst elements and a certified repair; failures refine the grid near them and rebuild, within bounded attempts and growth. The output passes the certified Jacobian check of every element and a gate that the boundary encloses the elements' volume; boundary quads carry their B-rep faces. Quality is reported with the same scaled Jacobian as mesh.quality. Literature notes for each step are in docs/meshing/literature.md (B1.6-B1.10). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
45 lines
1.4 KiB
Rust
45 lines
1.4 KiB
Rust
//! Meshing: robust geometric predicates, boundary surface preparation, tetrahedral and
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//! hexahedral volume meshing, and element quality.
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//!
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//! Every algorithm here is implemented from the papers cited in its module docs (see
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//! `docs/meshing/literature.md`); no GPL-family code is read or used. Meshing decisions use exact
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//! predicates, results are deterministic, and every iterative stage is bounded.
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#![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)]
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#![forbid(unsafe_code)]
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pub mod block;
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pub mod cdt;
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pub mod delaunay;
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pub mod hex;
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pub mod join;
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pub mod octree;
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pub mod planar;
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pub mod quad;
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pub mod quality;
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pub mod size;
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pub mod surface;
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mod vec3;
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#[derive(Debug, Clone, PartialEq, thiserror::Error)]
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pub enum Error {
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#[error("invalid input: {0}")]
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Invalid(String),
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#[error("limit reached: {0}")]
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Limit(String),
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#[error("meshing failed: {0}")]
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Failed(String),
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/// The input is valid but outside what the mesher handles yet (a body that is not
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/// sweepable, …); the message says why.
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#[error("not supported yet: {0}")]
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Unsupported(String),
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/// The boundary surface has defects ([`surface::BoundarySurface::new`]).
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#[error("invalid boundary surface: {0}")]
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Surface(surface::Defects),
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#[error(transparent)]
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Model(#[from] fieldcraft_model::Error),
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}
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pub type Result<T> = std::result::Result<T, Error>;
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pub mod predicates;
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