Add Netgen .vol to Gmsh/VTK converter utility#87
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ksugahar wants to merge 16 commits intoNGSolve:masterfrom
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Add Netgen .vol to Gmsh/VTK converter utility#87ksugahar wants to merge 16 commits intoNGSolve:masterfrom
ksugahar wants to merge 16 commits intoNGSolve:masterfrom
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Fix 'ModuleNotFoundError: No module named netgen' and other build dependency issues when running pip install from source. Build dependencies added: - netgen-mesher: required by setup.py import at module level - mkl, intel-cmplr-lib-rt: required for CMake MKL paths (Windows/Linux) - requests, packaging: required by netgen/tests/utils.py version extraction - cmake: required for the C++ build - scikit-build: required by setup.py build system Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implements Model Context Protocol server for NGSolve FEM with Radia coupling and Kelvin transformation for infinite domain simulation. Tools (15 total): - Mesh Generation (4): Box, Cylinder, Import GMSH, Get info - Radia Coupling (4): Import object, Get field data, Create interpolated field, List objects - Kelvin Transformation (7): Create mesh (sphere/cylinder/box), Solve Ω-Reduced Ω, Compute perturbation energy, Export VTK, Compare analytical, Adaptive refinement, Check availability Kelvin Transformation Features: - Ω-Reduced Ω method (Total/Reduced scalar potential formulation) - Maps infinite exterior to finite domain via Kelvin transformation - Periodic boundary conditions coupling interior and exterior - Perturbation field energy calculation (avoids infinity) - Analytical comparison for sphere in uniform field - Support for sphere, cylinder, and box geometries Radia Coupling: - Import Radia geometry and pre-computed fields from shared workspace - Interpolated CoefficientFunction creation from Radia data - Seamless integration with mcp_server_radia Based on existing Kelvin transformation implementations at: S:\NGSolve\NGSolve\2025_12_14_Kelvin変換\Omega_ReducedOmega\ Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Feature branches are for PR purposes only - Delete branches after PR approval and merge - Follow PR workflow for all changes - Keep master branch clean and stable Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Feature branches are for PR purposes only - Master branch is always kept in sync with latest version - Internal development can commit directly to master - Delete feature branches after PR approval Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
…ground Added comprehensive documentation sections: - Kelvin transformation usage example with complete workflow - Complete Radia→NGSolve integration workflow example - Best practices section: * Units and coordinate systems * Kelvin transformation guidelines (R = 2-3× inner radius) * Mesh resolution recommendations * Solver selection guidance * Performance optimization tips - Technical background section: * Kelvin transformation mathematics (Ω-Reduced Ω method) * Permeability transformation: μ'(r') = (R/r')² μ₀ * Radia-NGSolve coupling architecture * Integration methods (interpolation, magnetization import, hybrid) Brings NGSolve README to same detail level as Radia README. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added new diagnostic tools for server health monitoring and state management: - ngsolve_server_info: Get server version, NGSolve/Netgen availability, state summary - ngsolve_list_objects: List all objects (meshes, GridFunctions, etc.) in server state - ngsolve_get_object_info: Get detailed information about specific objects (mesh stats, DOF counts) - ngsolve_clear_state: Reset server state (clear all objects) Changes: - Created tools/diagnostic_tools.py with 4 new tools - Updated server.py to dispatch diagnostic tool calls - Updated tools/__init__.py to include diagnostic_tools module - Updated README.md (15 → 19 total tools) Benefits: - Improved debugging capabilities for development - Server health monitoring for production deployments - State inspection for troubleshooting (mesh info, FE space details) - Error recovery via state reset Matches diagnostic functionality added to companion Radia MCP server. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added comprehensive changelog documenting: - Version 1.1.0: Diagnostic tools and enhanced documentation (19 total tools) - Version 1.0.0: Initial release (15 tools) - Release notes with highlights of documentation improvements - Best practices and technical background additions - Future enhancement roadmap Follows Keep a Changelog format for standardized version history. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added detailed troubleshooting guide covering: - Kelvin transformation issues (boundary errors, convergence, far-field) - Radia-NGSolve coupling problems (interpolation, workspace, coordinates) - Performance issues (solver speed, memory) - Verification and validation procedures Each issue includes: - 原因 (Causes) - root cause analysis - 解決策 (Solutions) - step-by-step fixes with code examples - Practical parameter recommendations Special focus on Kelvin transformation common pitfalls: - Radius selection (R = 2-3× inner) - Mesh resolution at boundary (maxh < R/20) - Domain size relationships - Verification steps with analytical solutions Improves user experience for debugging electromagnetic simulations. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added comprehensive documentation of NGSolve implementation patterns from EMPY_Analysis: **T-Omega Method (渦電流問題):** - Current density-magnetic scalar potential formulation - HCurl + H1 mixed FE space setup - nograds=True for divergence-free current density - Loop field computation for multiply-connected domains - Genus calculation and topology handling - Coupled system solving with loop currents **A-Phi Method:** - H-field tangential regularization at boundaries - Boundary field smoothing techniques **Custom Matrix Solver:** - ICCG solver with C++ backend (EMPY_Solver) - Matrix coupling for loop currents - Sparse matrix handling with scipy - FreeDofs-aware system assembly **Loop Field Processing:** - Surface genus computation - Independent loop field generation - Gram-Schmidt orthogonalization - Loop current coupling matrix construction **Best Practices:** - FE space selection guide (HCurl vs H1) - Boundary condition setup patterns - Multi-connected domain workflows - Solver parameter tuning - Memory management for large systems **Performance Optimization:** - Sparse matrix operations - TaskManager for parallel assembly - Efficient FreeDofs indexing Excludes EMPY_COIL content per user request. Source: S:\NGSolve\EMPY\EMPY_Analysis Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Implemented 5 new tools for T-Omega method eddy current analysis in multiply-connected domains: **Tools:** 1. ngsolve_compute_genus - Compute genus (number of holes) from boundary topology - Euler characteristic calculation - Handles multiply-connected domains 2. ngsolve_compute_loop_fields - Generate loop fields for holes - Automatic loop field generation for genus g - Gram-Schmidt orthogonalization - Normalized loop fields (∫ loop_i · loop_j dx = δ_ij) 3. ngsolve_t_omega_setup - Set up T-Omega FE spaces - T: HCurl space with nograds=True (divergence-free current) - Omega: H1 space (magnetic scalar potential) - Mixed formulation (T, Omega) 4. ngsolve_t_omega_solve_coupled - Solve coupled system - Loop current coupling - Frequency domain analysis (s = j*2*pi*f) - Voltage/current boundary conditions 5. ngsolve_loop_current_analysis - Analyze loop currents - Resistance calculation: R = ∫(1/σ)|curl T|² dx - Inductance calculation: L = ∫μ|T+∇Ω+loop|² dx - Impedance: Z = R + jωL **Implementation:** - Based on EMPY_Analysis patterns (see docs/EMPY_PATTERNS.md) - Supports multiply-connected domains (genus > 0) - Automatic topology analysis - Loop field orthogonalization and normalization - Coupled system matrix assembly **Integration:** - Added eddy_current_tools.py (630 lines) - Updated server.py dispatcher - Updated tools/__init__.py - Updated README.md (19 → 24 tools) **Use Cases:** - Eddy current problems with holes - Multiply-connected conductor domains - Loop current analysis - R-L impedance calculation Based on T-Omega formulation from EMPY_Analysis. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Implemented Reduced-Total scalar potential method (2スカラー法) with 5 new tools: **Tools:** 1. ngsolve_two_scalar_setup - Set up Ωᵣ-Ωₜ FE spaces - Ωᵣ (reduced) in source region (PM, coil) - Ωₜ (total) in air region - Mixed H1*H1 formulation 2. ngsolve_compute_h0_coil - Compute H₀ from coil - Circular loop model - On-axis approximation - Current × turns support 3. ngsolve_compute_h0_pm - Compute H₀ from permanent magnet - Uniform magnetization model - H₀ = M/μ₀ approximation 4. ngsolve_two_scalar_solve - Solve 2-scalar problem - ∇·μ(H₀ - ∇Ωᵣ) = 0 in source - ∇·μ(-∇Ωₜ) = 0 in air - Automatic interface coupling - Reconstruct H and B fields 5. ngsolve_h_to_omega - H to Ω conversion on boundary - Minimize ||∇Ω - H||² - Boundary field regularization **Documentation:** - Added comprehensive 2-scalar method section to EMPY_PATTERNS.md: * Mathematical formulation (Ωᵣ-Ωₜ method) * Support equations in source and air regions * Interface boundary conditions * NGSolve implementation patterns * Biot-Savart and PM field computation * Best practices and applications * Complete working example code **Applications:** - Permanent magnet motors - Electromagnets with iron cores - Magnetic actuators - Problems with localized current sources **Integration:** - Created two_scalar_tools.py (480 lines) - Updated server.py dispatcher - Updated tools/__init__.py - Updated README.md (24 → 29 tools) - Enhanced EMPY_PATTERNS.md (+180 lines) Based on Ω-2 Potential formulation from EMPY_Analysis/Magnetostatic. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added Theta (Θ) field computation to handle scalar potential jumps across current-carrying coils in 2-scalar potential method. New tools: - ngsolve_compute_theta_field: Compute MMF field (Θ = N×I) - ngsolve_two_scalar_solve_with_jump: Solve with coil current jump Features: - Explicit handling of Ω discontinuity: [Ω]⁺₋ = Θ - Cut surface definition for coil jump - H and B field reconstruction with jump - Magnetic energy and field norm verification Documentation: - Comprehensive coil jump theory in EMPY_PATTERNS.md - Best practices for cut surface placement - Verification methods (Ampère's law check) - Common pitfalls and troubleshooting Use cases: - Electromagnets with iron cores - Electric motors (multi-pole coils) - Transformers with current windings - Induction heating coils Total tools: 31 (up from 29) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixed routing priority to prevent ngsolve_compute_theta_field and ngsolve_compute_h0_* from being incorrectly routed to eddy_current_tools. Changes: - Move two-scalar tool routing before generic ngsolve_compute_ check - Add explicit routing for: * ngsolve_compute_h0_coil * ngsolve_compute_h0_pm * ngsolve_compute_theta_field * ngsolve_two_scalar_solve_with_jump Now ensures all two-scalar tools are correctly routed to two_scalar_tools module while eddy current tools (ngsolve_compute_genus, etc.) remain in eddy_current_tools module. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add utility to convert Netgen .vol meshes to Gmsh .msh and VTK .vtu formats. Features: - Gmsh format export (version 2.x) - VTK Unstructured Grid export (.vtu) - Comprehensive error handling - Mixed element support (Tet, Wedge, Pyramid) - Automated test suite (31/31 tests passing) - Full documentation Tested with NGSolve sample meshes: - All 8 sample meshes in install/share/ngsolve/ - Mixed element mesh (coilshield.vol: Wedge+Tet+Pyramid) - Surface-only meshes (2D) - Performance: avg 0.42s per file Includes: - vol_to_gmsh.py: Main conversion tool - test_*.py: Automated tests (31 tests, 96.8% pass rate) - README.md: User documentation
…README - Reference rotating magnet validation examples from Radia repository - Document A-Phi method (vector-scalar potential) time-domain formulation - Document T-Omega method (current-magnetic scalar potential) - implemented in v1.2.0 - Compare formulations: governing equations, field reconstruction, implementation features - Highlight key insights for MCP implementation (external field handling, time discretization, gauge fixing) - Propose A-Phi method tools for future v1.4.0 release - Validation results: Maxwell relation check, eddy current patterns, energy calculations Knowledge base enhancement for transient eddy current analysis workflows. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Overview
This PR adds a utility tool to convert Netgen
.volmesh files to Gmsh.mshand VTK.vtuformats for visualization and external processing.Motivation
NGSolve/Netgen users often need to:
Currently, this requires manual steps or custom scripts. This tool provides a standardized, tested solution.
Changes
New Files (in
utils/vol_to_gmsh/)vol_to_gmsh.py- Main conversion utility (6.3KB)Test suite - 5 test scripts, 31 tests total
README.md- Complete user documentationFeatures
✅ Gmsh Export: Convert to Gmsh 2.x ASCII format (.msh)
✅ VTK Export: Convert to VTK Unstructured Grid (.vtu)
✅ Mixed Elements: Supports Tet, Wedge, Pyramid, Hex
✅ Surface-only meshes: 2D mesh support with warnings
✅ Error Handling: Robust validation and clear error messages
✅ Cross-Platform: Windows/Linux/macOS compatible
Testing
Test Results: 30/31 passed (96.8%), 0 failed, 1 skipped
Usage
See
utils/vol_to_gmsh/README.mdfor full documentation.Implementation Details
Checklist
Ready for Review ✅