Collection of explicitly constructed meshes

# meshzoo When generating meshes for FEM/FVM computations, sometimes your geometry is so simple that you don't need a complex mesh generator (like pygmsh, MeshPy, mshr, pygalmesh, dmsh), but something simple and fast that makes use of the structure of the domain. Enter meshzoo.

### Examples

#### Triangle ```import meshzoo

bary, cells = meshzoo.triangle(8)

# corners = numpy.array(
#     [
#         [0.0, -0.5 * numpy.sqrt(3.0), +0.5 * numpy.sqrt(3.0)],
#         [1.0, -0.5, -0.5],
#     ]
# )
# points = numpy.dot(corners, bary).T

# Process the mesh, e.g., write it to a file using meshio
# meshio.write_points_cells("triangle.vtk", points, {"triangle": cells})
```

#### Rectangle  ```import meshzoo

points, cells = meshzoo.rectangle_tri(
(0.0, 0.0),
(1.0, 1.0),
n=11,  # or (11, 11)
variant="zigzag",  # or "up", "down", "center"
)

points, cells = meshzoo.rectangle_quad((0.0, 0.0), (1.0, 1.0), n=11)
```

#### Regular polygon   `meshzoo.ngon(4, 8)` `meshzoo.ngon(6, 8)` `meshzoo.ngon(9, 8)`
```import meshzoo

points, cells = meshzoo.ngon(5, 11)
```

#### Disk   `meshzoo.disk(4, 8)` `meshzoo.disk(6, 8)` `meshzoo.disk(9, 8)`

The disk meshes are inflations of regular polygons.

```import meshzoo

points, cells = meshzoo.disk(6, 11)

```

#### Möbius strip ```import meshzoo

points, cells = meshzoo.moebius(num_twists=1, nl=60, nw=11)
```

#### Sphere (surface)  ```import meshzoo

points, cells = meshzoo.uv_sphere(num_points_per_circle=20, num_circles=10, radius=1.0)
)
```

Spheres can also be generated by refining the faces of platonic solids and then "inflating" them. meshzoo implements a few of them. The sphere generated from the icosahedron has the highest-quality (most equilateral) triangles.

All cells are oriented such that its normal points outwards.   `meshzoo.tetra_sphere(10)` `meshzoo.octa_sphere(10)` `meshzoo.icosa_sphere(10)`

#### Ball (solid)  ```import meshzoo

points, cells = meshzoo.ball_tetra(10)
points, cells = meshzoo.ball_hexa(10)
```

#### Tube ```import meshzoo

points, cells = meshzoo.tube(length=1.0, radius=1.0, n=30)
```

#### Cube  ```import meshzoo

points, cells = meshzoo.cube_tetra((0.0, 0.0, 0.0), (1.0, 1.0, 1.0), n=11)
points, cells = meshzoo.cube_hexa((0.0, 0.0, 0.0), (1.0, 1.0, 1.0), n=11)
```

### Extra, extra

In addition to this, the `examples/` directory contains a couple of instructive examples for other mesh generators.

### Installation

meshzoo is available from the Python Package Index, so simply do

``````pip install meshzoo
``````

to install.

### Testing

To run the meshzoo unit tests, check out this repository and run

``````pytest
``````

meshzoo is published under the MIT license.

## Project details

This version 0.7.5 0.7.4 0.7.3 0.7.2 0.7.1 0.7.0 0.6.3 0.6.2 0.6.1 0.6.0 0.5.6 0.5.5 0.5.4 0.5.3 0.5.2 0.5.1 0.5.0 0.4.3 0.4.2 0.4.1 0.4.0 0.3.2 0.3.1 0.3.0 0.2.3 0.2.2 0.2.1 0.2.0 0.1.9 0.1.8 0.1.7 0.1.6 0.1.5 0.1.4 0.1.3 0.1.2 0.1.1 0.1.0