tulpaMesh 0.1.3

• Parallel FEM assembly (fem_matrices(parallel = TRUE)) no longer references Intel TBB symbols directly. Each worker now accumulates triplets into a chunk-local buffer that is merged under a mutex, so the package builds on platforms where RcppParallel falls back to its TinyThread backend (for example Alpine Linux with musl).
• Fixed tulpa_mesh(max_edge = ...) collapsing to zero triangles for some (max_edge, cutoff) settings and point counts. Vertex deduplication could merge extended-hull boundary vertices that fell within max_edge * 0.3 of each other, deleting a constraint edge and leaving the boundary loop open; the constrained triangulation then erased every triangle. Boundary and hole vertices are now protected from deduplication so the constraint loop stays closed.
• tulpa_mesh() now errors loudly when the triangulation yields zero triangles (for example a collinear point set) instead of returning an empty mesh that silently produces all-zero FEM matrices.

tulpaMesh 0.1.1

• Removed single quotes from person names and algorithm names in DESCRIPTION Title and Description fields per CRAN policy.
• Added Artem Amirkhanov (CDT library) and William C. Lenthe (predicates.h) to Authors@R with ctb and cph roles.
• Updated inst/COPYRIGHTS to separately document predicates.h (BSD-3-Clause).

tulpaMesh 0.1.0

Initial CRAN release.

Mesh Generation

• tulpa_mesh(): constrained Delaunay triangulation with formula interface, sf boundary support (POLYGON, MULTIPOLYGON, holes), hexagonal lattice refinement, Ruppert refinement (min_angle, max_area), and vertex deduplication.
• tulpa_mesh_sphere(): icosahedral geodesic meshes with 3D surface FEM.
• tulpa_mesh_1d(): temporal meshes with tridiagonal FEM matrices.
• tulpa_mesh_graph(): metric graph meshes for network SPDE models.

FEM Assembly

• fem_matrices(): P1 linear FEM producing mass (C), stiffness (G), and projection (A) sparse matrices. Supports lumped mass, barrier models, and parallel assembly via RcppParallel.
• fem_matrices_p2(): P2 quadratic FEM with 6-node triangular elements.
• fem_matrices_nonstationary(): spatially varying kappa/tau weighting.

Mesh Operations

• mesh_quality(), mesh_summary(), plot.tulpa_mesh(): diagnostics.
• subdivide_mesh(), subset_mesh(), mesh_components(): mesh manipulation.
• refine_mesh(): adaptive refinement from error indicators.
• as_tulpa_mesh(): convert fmesher/INLA meshes.
• barrier_triangles(): identify barrier regions from polygons.
• mesh_crs(), set_crs(): CRS support.