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.