Metadata-Version: 2.4
Name: pyvista-gridder
Version: 0.4.3
Summary: Mesh generation using PyVista
Author-email: Keurfon Luu <kluu@intera.com>
License-Expression: BSD-3-Clause
Project-URL: Homepage, https://github.com/INTERA-Inc/pyvista-gridder
Project-URL: Code, https://github.com/INTERA-Inc/pyvista-gridder
Project-URL: Issues, https://github.com/INTERA-Inc/pyvista-gridder/issues
Keywords: mesh generation,numerical modeling,pyvista
Classifier: Operating System :: OS Independent
Classifier: Development Status :: 4 - Beta
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: 3.13
Classifier: Natural Language :: English
Classifier: Intended Audience :: Science/Research
Classifier: Topic :: Scientific/Engineering
Requires-Python: >=3.9
Description-Content-Type: text/markdown
License-File: LICENSE
Requires-Dist: numpy>=1.13.0
Requires-Dist: pyrequire
Requires-Dist: pyvista>=0.45
Requires-Dist: scipy>=0.9
Requires-Dist: vtk>=9.4
Provides-Extra: full
Requires-Dist: gmsh; extra == "full"
Requires-Dist: shapely>=2.0; extra == "full"
Dynamic: license-file

<p align="center">
   <img src="https://github.com/INTERA-Inc/pyvista-gridder/blob/main/.github/logo/logo.png?raw=true" width=25%>
   <h1 align="center"><b>PyVista Gridder</b></h1>
</p>

[![License](https://img.shields.io/badge/license-BSD--3--Clause-green)](https://github.com/INTERA-Inc/pyvista-gridder/blob/master/LICENSE)
[![Stars](https://img.shields.io/github/stars/INTERA-Inc/pyvista-gridder?style=flat&logo=github)](https://github.com/INTERA-Inc/pyvista-gridder)
[![Pyversions](https://img.shields.io/pypi/pyversions/pyvista-gridder.svg?style=flat)](https://pypi.org/pypi/pyvista-gridder/)
[![Version](https://img.shields.io/pypi/v/pyvista-gridder.svg?style=flat)](https://pypi.org/project/pyvista-gridder)
[![Downloads](https://pepy.tech/badge/pyvista-gridder)](https://pepy.tech/project/pyvista-gridder)
[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg?style=flat)](https://github.com/psf/black)

Structured and unstructured mesh generation using PyVista for the Finite-Element (FEM), Finite-Difference (FDM), and Finite-Volume Methods (FVM).

## Features

- **Pre-Meshed Geometric Objects**: Easily create basic geometric objects with pre-defined meshes, using structured grids whenever possible.
- **Line/Polyline Extrusion**: Extrude lines or polylines into 2D structured grids.
- **Surface Extrusion**: Extrude surface meshes into volumetric meshes while preserving their original type.
- **1.5D/2.5D Mesh Creation**: Generate meshes by stacking polylines or surfaces, ideal for geological modeling and similar applications.
- **2D Voronoi Mesh Generation**: Create 2D Voronoi meshes from a background mesh, with support for adding constraint points to define custom shapes.
- **Mesh Merging**: Combine multiple PyVista meshes into a single mesh and assign cell groups, leaving conformity checks to the user.
- **Additional Utility Functions**: Includes tools to manipulate structured and unstructured grids.

## Installation

The recommended way to install **pyvista-gridder** and all its dependencies is through the Python Package Index:

```bash
pip install pyvista-gridder --user
```

Otherwise, clone and extract the package, then run from the package location:

```bash
pip install .[full] --user
```

To test the integrity of the installed package, check out this repository and run:

```bash
pytest
```

## Examples

### 2D structured grid

```python
import numpy as np
import pyvista as pv
import pvgridder as pvg

mesh = (
   pvg.MeshStack2D(pv.Line([-3.14, 0.0, 0.0], [3.14, 0.0, 0.0], resolution=41))
   .add(0.0)
   .add(lambda x, y, z: np.cos(x) + 1.0, 4, group="Layer 1")
   .add(0.5, 2, group="Layer 2")
   .add(0.5, 2, group="Layer 3")
   .add(0.5, 2, group="Layer 4")
   .add(lambda x, y, z: np.full_like(x, 3.4), 4, group="Layer 5")
   .generate_mesh()
)
mesh.plot(show_edges=True, scalars=pvg.get_cell_group(mesh))
```

![anticline](https://github.com/INTERA-Inc/pyvista-gridder/blob/main/.github/anticline.png?raw=true)

### 2D Voronoi mesh

```python
import numpy as np
import pyvista as pv
import pvgridder as pvg

smile_radius = 0.64
smile_points = [
   (smile_radius * np.cos(theta), smile_radius * np.sin(theta), 0.0)
   for theta in np.deg2rad(np.linspace(200.0, 340.0, 32))
]
mesh = (
   pvg.VoronoiMesh2D(pvg.Annulus(0.0, 1.0, 16, 32), default_group="Face")
   .add_circle(0.16, plain=False, resolution=16, center=(-0.32, 0.32, 0.0), group="Eye")
   .add_circle(0.16, plain=True, resolution=16, center=(0.32, 0.32, 0.0), group="Eye")
   .add_polyline(smile_points, width=0.05, group="Mouth")
   .generate_mesh()
)
mesh.plot(show_edges=True, scalars=pvg.get_cell_group(mesh))
```

![nightmare-fuel](https://github.com/INTERA-Inc/pyvista-gridder/blob/main/.github/nightmare_fuel.png?raw=true)

### 2.5D geological model

```python
import pyvista as pv
import pvgridder as pvg

terrain = pv.examples.download_crater_topo().extract_subset(
   (500, 900, 400, 800, 0, 0), (10, 10, 1)
)
terrain_delaunay = pvg.Polygon(terrain, celltype="triangle")
terrain = terrain.cast_to_structured_grid().warp_by_scalar("scalar1of1")

mesh = (
   pvg.MeshStack3D(
      pvg.VoronoiMesh2D(terrain_delaunay, preference="point").generate_mesh()
   )
   .add(0.0)
   .add(terrain.translate((0.0, 0.0, -1000.0)), 5, method="log_r", group="Bottom layer")
   .add(500.0, 5, group="Middle layer")
   .add(terrain, 5, method="log", group="Top Layer")
   .generate_mesh()
)
mesh.plot(show_edges=True, scalars=pvg.get_cell_group(mesh))
```

![topographic-terrain](https://github.com/INTERA-Inc/pyvista-gridder/blob/main/.github/topographic_terrain.png?raw=true)

## Acknowledgements

This project is supported by Nagra (National Cooperative for the Disposal of Radioactive Waste), Switzerland.
