ConformalLabpp

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Author	SHA1	Message	Date
Tarik Moussa	194effba97	feat(phase3f+3g): analytical Hessians + PI consolidation Phase 3g — constants.hpp: - Introduce conformallab::PI and TWO_PI in a single constants.hpp - Remove scattered local PI/pi definitions from hyper_ideal_geometry.hpp, hyper_ideal_utility.hpp, euclidean_functional.hpp, mesh_builder.hpp, spherical_geometry.hpp (backward-compatible PI_SPHER alias kept) Phase 3f — Euclidean Hessian (euclidean_hessian.hpp): - Cotangent-Laplace operator (Pinkall–Polthier 1993) - euclidean_cot_weights() helper + euclidean_hessian() + hessian_check_euclidean() - Correct Pinkall–Polthier 1/2 normalization factor - 8 tests: cot weights, symmetry, null-space (H·1=0), PSD, FD × 4 meshes Phase 3f — Spherical Hessian (spherical_hessian.hpp): - Derives ∂α_i/∂u_j directly from the spherical law of cosines: ∂α1/∂l_opp = sin(l_opp) / [sin(l_a)·sin(l_b)·sin(α1)] ∂α1/∂l_adj = [cot(l_adj)·cos(α1) − cot(l_other)] / sin(α1) then chains with ∂l/∂λ = tan(l/2) - spherical_cot_weights() kept as a standalone helper (tested separately) - 8 tests: cot weights, symmetry, correct null-space & sign-convention (H·1 ≠ 0; H is NSD at equilibrium), FD × 3 meshes All 62 cgal tests pass (3 skipped as before). Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>	2026-05-12 17:22:28 +02:00
Tarik Moussa	c30d540521	add GTest infrastructure and port first mathematical tests from Java - Add Google Test via CMake FetchContent (v1.14.0) - Add clausen.hpp: Clausen integral, Lobachevsky function, Im(Li2) - Add hyper_ideal_utility.hpp: generalized and ideal-vertex hyperbolic tetrahedron volume formulas using Eigen for the 4x4 Gram determinant - Port ClausenTest (5 tests) and HyperIdealUtilityTest (8 tests) from Java/JUnit — all 13 pass with same tolerances as the Java originals - Fix pre-existing VIEWER/viewer case mismatch in CMakeLists.txt Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-05-09 01:07:19 +02:00

Author

SHA1

Message

Date

Tarik Moussa

194effba97

feat(phase3f+3g): analytical Hessians + PI consolidation

Phase 3g — constants.hpp:
  - Introduce conformallab::PI and TWO_PI in a single constants.hpp
  - Remove scattered local PI/pi definitions from hyper_ideal_geometry.hpp,
    hyper_ideal_utility.hpp, euclidean_functional.hpp, mesh_builder.hpp,
    spherical_geometry.hpp (backward-compatible PI_SPHER alias kept)

Phase 3f — Euclidean Hessian (euclidean_hessian.hpp):
  - Cotangent-Laplace operator (Pinkall–Polthier 1993)
  - euclidean_cot_weights() helper + euclidean_hessian() + hessian_check_euclidean()
  - Correct Pinkall–Polthier 1/2 normalization factor
  - 8 tests: cot weights, symmetry, null-space (H·1=0), PSD, FD × 4 meshes

Phase 3f — Spherical Hessian (spherical_hessian.hpp):
  - Derives ∂α_i/∂u_j directly from the spherical law of cosines:
      ∂α1/∂l_opp  = sin(l_opp) / [sin(l_a)·sin(l_b)·sin(α1)]
      ∂α1/∂l_adj  = [cot(l_adj)·cos(α1) − cot(l_other)] / sin(α1)
    then chains with ∂l/∂λ = tan(l/2)
  - spherical_cot_weights() kept as a standalone helper (tested separately)
  - 8 tests: cot weights, symmetry, correct null-space & sign-convention
    (H·1 ≠ 0; H is NSD at equilibrium), FD × 3 meshes

All 62 cgal tests pass (3 skipped as before).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

2026-05-12 17:22:28 +02:00

Tarik Moussa

c30d540521

add GTest infrastructure and port first mathematical tests from Java

- Add Google Test via CMake FetchContent (v1.14.0)
- Add clausen.hpp: Clausen integral, Lobachevsky function, Im(Li2)
- Add hyper_ideal_utility.hpp: generalized and ideal-vertex hyperbolic
  tetrahedron volume formulas using Eigen for the 4x4 Gram determinant
- Port ClausenTest (5 tests) and HyperIdealUtilityTest (8 tests) from
  Java/JUnit — all 13 pass with same tolerances as the Java originals
- Fix pre-existing VIEWER/viewer case mismatch in CMakeLists.txt

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-09 01:07:19 +02:00

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