cad-mesh-generation

name	cad-mesh-generation
version	1.0.0
category	data
description	Generate parametric CAD geometry and finite element meshes using FreeCAD and GMSH
type	reference
capabilities	[]
requires	[]
tags	[]

Cad Mesh Generation

When to Use This Skill

Use this skill when you need to:

• Create parametric CAD models of vessels, platforms, or structures
• Generate meshes for finite element analysis (FEA)
• Generate panel meshes for boundary element methods (BEM/hydrodynamics)
• Automate geometry creation for marine structures
• Export geometry to AQWA, WAMIT, ANSYS, or other analysis tools
• Create complex geometries programmatically with Python
• Perform mesh quality checks and refinement

Core Knowledge Areas

1. FreeCAD Python Scripting Basics

Creating geometry with FreeCAD Python API:

import sys
from pathlib import Path
from typing import List, Tuple, Optional
import numpy as np

# Try to import FreeCAD, provide fallback for development
try:

*See sub-skills for full details.*
### 2. GMSH Mesh Generation

Creating meshes with GMSH Python API:

```python
# Try to import gmsh
try:
    import gmsh
    GMSH_AVAILABLE = True
except ImportError:
    GMSH_AVAILABLE = False
    print("Warning: GMSH not available, using mock")

*See sub-skills for full details.*
### 3. Mesh Quality Assessment

Check mesh quality metrics:

```python
def analyze_mesh_quality(
    mesh_file: Path,
    mesh_type: str = 'surface'
) -> dict:
    """
    Analyze mesh quality metrics.


*See sub-skills for full details.*
### 4. Mesh Conversion for Analysis Tools

Convert meshes to various formats:

```python
def convert_mesh_to_wamit_gdf(
    mesh_file: Path,
    output_file: Path,
    symmetry: str = 'none'
) -> None:
    """
    Convert GMSH mesh to WAMIT .gdf format.

*See sub-skills for full details.*

## Complete Examples

### Example 1: Complete Vessel Geometry and Mesh Workflow

```python
from pathlib import Path
import numpy as np

def complete_vessel_geometry_workflow() -> :