### 6 releases (breaking)

0.5.0 | Dec 21, 2022 |
---|---|

0.4.0 | May 24, 2022 |

0.3.0 | Dec 4, 2021 |

0.2.0 | Feb 21, 2021 |

0.1.0 | Dec 28, 2020 |

#**482** in Graphics APIs

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Used in **5** crates
(4 directly)

**Apache-2.0**

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# truck-topology

Topological structs: vertex, edge, wire, face, shell, and solid

###
`lib.rs`

:

Topological structs: vertex, edge, wire, face, shell, and solid

## Examples

The following sample code is a description of a topological tetrahedron as a solid model by this package.

`use` `truck_topology``::``*``;`
`//` Create vertices. A tetrahedron has four vertices.
`let` v `=` `Vertex``::`news`(``&``[``(``)``,` `(``)``,` `(``)``,` `(``)``]``)``;`
`//` Create edges. Vertex is implemented the Copy trait.
`let` edge `=` `[`
`Edge``::`new`(``&`v`[``0``]``,` `&`v`[``1``]``,` `(``)``)``,`
`Edge``::`new`(``&`v`[``0``]``,` `&`v`[``2``]``,` `(``)``)``,`
`Edge``::`new`(``&`v`[``0``]``,` `&`v`[``3``]``,` `(``)``)``,`
`Edge``::`new`(``&`v`[``1``]``,` `&`v`[``2``]``,` `(``)``)``,`
`Edge``::`new`(``&`v`[``1``]``,` `&`v`[``3``]``,` `(``)``)``,`
`Edge``::`new`(``&`v`[``2``]``,` `&`v`[``3``]``,` `(``)``)``,`
`]``;`
`//` Create boundaries of faces as the wire.
`//` Edge is implemented the Copy trait.
`let` wire `=` `vec!``[`
`Wire``::`from_iter`(``vec!``[``&`edge`[``0``]``,` `&`edge`[``3``]``,` `&`edge`[``1``]``.``inverse``(``)``]``)``,`
`Wire``::`from_iter`(``vec!``[``&`edge`[``1``]``,` `&`edge`[``5``]``,` `&`edge`[``2``]``.``inverse``(``)``]``)``,`
`Wire``::`from_iter`(``vec!``[``&`edge`[``2``]``,` `&`edge`[``4``]``.``inverse``(``)``,` `&`edge`[``0``]``.``inverse``(``)``]``)``,`
`Wire``::`from_iter`(``vec!``[``&`edge`[``3``]``,` `&`edge`[``5``]``,` `&`edge`[``4``]``.``inverse``(``)``]``)``,`
`]``;`
`//` Create faces by the boundary wires.
`//` The boundary of face must be simple and closed.
`let` `mut` face`:` `Vec``<`Face`<``_`, `_`, `_``>``>` `=` wire`.``into_iter``(``)``.``map``(``|``wire``|` `Face``::`new`(``vec!``[`wire`]``,` `(``)``)``)``.``collect``(``)``;`
face`[``3``]``.``invert``(``)``;`
`//` Create shell of faces. Shell can be created by the Vec<Face>.
`let` shell`:` `Shell``<``_`, `_`, `_``>` `=` face`.``into``(``)``;`
`//` Create a tetrahedron solid by the boundary shell.
`//` The boundaries of a solid must be closed and oriented.
`let` solid `=` `Solid``::`new`(``vec!``[`shell`]``)``;`

## Elements and containers

Main structures in

consist 4 topological elements and 2 topological containers.`truck_topology`

### topological elements

The following structures are topological elements.

Except

, each topological element has a unique `Solid`

for each instance.
In higher-level packages, by mapping this `id`

to geometric information, you can draw a solid shape.`id`

### topological containers

The following structures are topological container.

The entities of

and `Wire`

are `Shell`

and `std ::`

`collections`VecDeque

`::`

`<`Edge`>``std``::``vec``::`Vec`<`Face`>`

,
respectively, and many methods inherited by `Deref`

and `DerefMut`

.
These containers are used for creating higher-dimentional topological elements and checked the
regularity (e.g. connectivity, closedness, and so on) before creating these elements.#### Dependencies

~4MB

~85K SLoC