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1. Building a Hex Mesh
First, we are going to construct a structured hex mesh. The hex mesh will span
from 0 meters to 4000 m, 4000 m, and 3000 m, for the x/y/z coordinates
respectively.
For both consistency and rapid parameter manipulation, these can be stored in
variables. In LaGriT, variables are assigned using the `define` keyword.
```
define / X0 / 0.
define / X1 / 4000.
define / Y0 / 0.
define / Y1 / 4000.
define / Z0 / 0.
define / Z1 / 3000.
define / NX / 51
define / NY / 51
define / NZ / 26
define / MONAME / mohex
```
Above, the spatial domain (`X0,X1,Y0,...`), element density (`NX/NY/NZ`), and
mesh name (`MONAME`) have been defined.
Next, we will create an empty mesh object, with element type `hex`, using the
[`cmo / create`](../../docs/commands/cmo/cmo_create.md) command:
```
cmo / create / MONAME / / / hex
```
Due to the variable assignment of `MONAME <- mohex` above, this command is
translated internally as:
```
cmo / create / mohex / / / hex
```
This empty object can then be populated with nodes and elements.
The [`createpts / brick`](../../docs/commands/createpts/CRTPTBRICK.md) command will generate a defined number of
hex elements across a defined domain.
```
createpts / brick / xyz / NX NY NZ / X0 Y0 Z0 / X1 Y1 Z1 / 1 1 1
```
`NX` number of hex elements, along with their corresponding vertices, have been
created in the spatial domain spanning `X0->X1`, along with `NY` elements in
the Y domain and `NZ` elements in the Z domain.
Optionally, [save the mesh object](../../docs/commands/DUMP2.md):
```
dump / avs / tmp_hex_01.inp / MONAME
```
This file can be rendered in certain scientific 3D visualization applications,
such as [ParaView](https://www.paraview.org).