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ConformalLabpp/code/include/conformal_mesh.hpp
Tarik Moussa e04515c423 docs(doxygen): fix critical extraction bug; baseline 24% → 42% on public API
ROOT CAUSE FIX
The Doxyfile EXCLUDE_PATTERNS line contained `*/* 2.hpp` (note the
space — a stray glob from macOS-style "foo 2.hpp" duplicate files).
That pattern was silently matching ALL .hpp / .h files, so Doxygen was
indexing nothing under code/include/.  The pre-existing 556 KB of HTML
output was effectively documenting only README.md, CLAUDE.md and a
small stub for std:: — not the C++ API at all.

After fixing the pattern (and properly escaping the space-prefixed
"foo 2.hpp / foo 2.h" macOS-dup patterns), Doxygen now extracts 141
compounds and emits 248 HTML pages from the public headers.

WHAT THIS PR ADDS
1. Doxyfile fix: correct EXCLUDE_PATTERNS; add GENERATE_XML for the
   coverage measurement script; add MathJax for `$$...$$` math in
   markdown; add the missing CGAL `\cgalParamNBegin/End/Description/
   Default/...` aliases so CGAL-style param blocks render correctly.

2. New headers:
   - code/include/CGAL/Conformal_map/doxygen_groups.h
     defines `PkgConformalMap{,Ref,Concepts,NamedParameters}`,
     resolving 17 prior "non-existing group" warnings.
   - code/include/CGAL/Conformal_map/doxygen_namespaces.h
     gives every namespace under `CGAL::` and `conformallab::` a
     brief description.

3. New tool: scripts/doxygen-coverage.sh
   Parses the XML output and reports % of public symbols (excluding
   the `detail::` implementation namespaces by default) that have a
   non-empty brief/detailed description.  Supports `--list-undoc`
   and `--threshold N` for CI integration.

4. Substantial docstring additions to the public CGAL headers:
   `Conformal_map_traits.h`, `Discrete_circle_packing.h`,
   `Discrete_inversive_distance.h`, `conformal_mesh.hpp`,
   `Discrete_conformal_map.h` (Hyper_ideal_map_result fields).

5. Markdown housekeeping that the strict-warning Doxygen run surfaced:
   tests.md (escape literal `#` in table cell),
   locked-vs-flexible.md (broken section anchor),
   overall_pipeline.md (replace `$$LaTeX$$` with inline-unicode math).

CURRENT NUMBERS

  before:  ~24%  documented (public API; the prior "87%" claim was
                 based on the broken extraction)
  after:    42%  documented   (165 of 396 public symbols)
  warnings: 0   (was 27 spurious + a flood of bogus undocumented
                  warnings hidden by the buggy EXCLUDE pattern)

NEXT (in a follow-up commit on this branch)
The remaining 231 public symbols (mostly in `layout.hpp`,
`hyper_ideal_functional.hpp`, `spherical_functional.hpp`, the per-mode
functional/Hessian files) can be brought to ~100% with another pass of
short `///` brief descriptions.  The coverage script is the gate; CI
can begin enforcing `--threshold 95` once the next pass lands.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-23 23:44:54 +02:00

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#pragma once
// conformal_mesh.hpp
//
// Central mesh type for the discrete conformal mapping algorithms.
// Replaces the Java CoHDS (de.varylab.discreteconformal.heds.CoHDS)
// and its associated vertex/edge/face types (CoVertex, CoEdge, CoFace).
//
// Design
// ------
// Java │ C++ (this file)
// ─────────────────────────────┼──────────────────────────────────────────
// CoHDS │ ConformalMesh (CGAL::Surface_mesh)
// CoVertex / CoEdge / CoFace │ Vertex_index / Edge_index / Face_index
// HyperIdealRadiusAdapter │ property_map<Vertex_index, double>
// HalfedgeInterface adapters │ named property maps ("v:lambda", …)
//
// Property-map naming convention
// ───────────────────────────────
// "v:lambda" per-vertex log scale factor (conformal variable u_i)
// "v:theta" per-vertex target cone angle
// "v:idx" per-vertex solver DOF index (-1 = pinned / boundary)
// "e:alpha" per-edge intersection angle (α_ij, hyperbolic geometry)
// "f:type" per-face geometry type (0=Euclidean, 1=Hyperbolic, 2=Spherical)
//
// All property maps are optional; add only what a given algorithm needs.
//
// Note on descriptor types (CGAL 6.x)
// ────────────────────────────────────
// CGAL::Surface_mesh exposes its index types as nested types:
// Surface_mesh::Vertex_index, ::Halfedge_index, ::Edge_index, ::Face_index
// The BGL graph_traits aliases expose the same types as vertex_descriptor etc.,
// but those live in boost::graph_traits<Surface_mesh>, not in Surface_mesh itself.
// We use the Surface_mesh member names throughout for clarity.
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Surface_mesh.h>
#include <string>
namespace conformallab {
// ── Kernel ──────────────────────────────────────────────────────────────────
// Simple double-precision Cartesian. Conformal mapping algorithms never
// need exact arithmetic — they operate on floating-point lengths and angles.
/// CGAL kernel used by all conformallab algorithms (double precision).
using Kernel = CGAL::Simple_cartesian<double>;
/// 3-D point type (vertex coordinates).
using Point3 = Kernel::Point_3;
/// 2-D point type (UV-domain layout coordinates).
using Point2 = Kernel::Point_2;
// ── Mesh type ────────────────────────────────────────────────────────────────
/// Triangle mesh carrying all conformal-map data as property maps.
using ConformalMesh = CGAL::Surface_mesh<Point3>;
// ── Index/descriptor aliases (CGAL 6.x naming) ───────────────────────────────
/// Vertex descriptor of `ConformalMesh`.
using Vertex_index = ConformalMesh::Vertex_index;
/// Half-edge descriptor of `ConformalMesh`.
using Halfedge_index = ConformalMesh::Halfedge_index;
/// Edge descriptor of `ConformalMesh`.
using Edge_index = ConformalMesh::Edge_index;
/// Face descriptor of `ConformalMesh`.
using Face_index = ConformalMesh::Face_index;
// ── Geometry type constant (replaces Java CoFace.type enum) ─────────────────
/// Discrete geometry type that a face/mesh is interpreted in.
/// Replaces the original Java `CoFace.type` enum.
enum class GeometryType : int {
Euclidean = 0, ///< Flat metric (ℝ²).
Hyperbolic = 1, ///< Hyperbolic metric (ℍ²).
Spherical = 2 ///< Spherical metric (S²).
};
// ── Standard property-map bundles ────────────────────────────────────────────
/// Register and return the vertex-side property maps used by all five
/// DCE functionals: `v:lambda` (log conformal factor), `v:theta` (target
/// cone angle), `v:idx` (contiguous integer index).
inline auto add_vertex_properties(ConformalMesh& mesh)
{
auto [lambda, ok1] = mesh.add_property_map<Vertex_index, double>("v:lambda", 0.0);
auto [theta, ok2] = mesh.add_property_map<Vertex_index, double>("v:theta", 0.0);
auto [idx, ok3] = mesh.add_property_map<Vertex_index, int> ("v:idx", -1);
(void)ok1; (void)ok2; (void)ok3;
return std::make_tuple(lambda, theta, idx);
}
/// Register and return the edge intersection-angle property `e:alpha`
/// (used by the hyper-ideal functional).
inline auto add_edge_properties(ConformalMesh& mesh)
{
auto [alpha, ok] = mesh.add_property_map<Edge_index, double>("e:alpha", 0.0);
(void)ok;
return alpha;
}
/// Register and return the per-face geometry-type property `f:type`.
inline auto add_face_properties(ConformalMesh& mesh)
{
auto [ftype, ok] = mesh.add_property_map<Face_index, int>(
"f:type", static_cast<int>(GeometryType::Euclidean));
(void)ok;
return ftype;
}
} // namespace conformallab