vtkio 0.6.3

Parser and writer for the legacy VTK file format
Documentation 
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#![cfg(feature = "xml")]
use std::io::BufReader;
use vtkio::{model::*, Error};

type Result = std::result::Result<(), Error>;

fn make_box_vtu() -> Vtk {
    Vtk {
        version: Version { major: 4, minor: 2 },
        title: String::new(),
        byte_order: ByteOrder::BigEndian,
        file_path: None,
        data: DataSet::inline(UnstructuredGridPiece {
            points: IOBuffer::F64(vec![
                0.5208333134651184,
                -0.5,
                0.5,
                -0.5208333134651184,
                -0.5,
                0.5,
                0.5208333134651184,
                0.5,
                0.5,
                -0.5208333134651184,
                0.5,
                0.5,
                -0.5208333134651184,
                -0.5,
                -0.5,
                0.5208333134651184,
                -0.5,
                -0.5,
                -0.5208333134651184,
                0.5,
                -0.5,
                0.5208333134651184,
                0.5,
                -0.5,
            ]),
            cells: Cells {
                cell_verts: VertexNumbers::XML {
                    connectivity: vec![
                        0, 1, 3, 2, 4, 5, 7, 6, 6, 7, 2, 3, 5, 4, 1, 0, 5, 0, 2, 7, 1, 4, 6, 3,
                    ],
                    offsets: vec![4, 8, 12, 16, 20, 24],
                },
                types: vec![CellType::Polygon; 6],
            },
            data: Attributes {
                point: vec![
                    Attribute::DataArray(DataArrayBase {
                        name: String::from("pressure"),
                        elem: ElementType::Scalars {
                            num_comp: 1,
                            lookup_table: None,
                        },
                        data: IOBuffer::F32(vec![-0.5, -0.5, 0.5, 0.5, -0.5, -0.5, 0.5, 0.5]),
                    }),
                    Attribute::DataArray(DataArrayBase {
                        name: String::from("Cd"),
                        elem: ElementType::Vectors,
                        data: IOBuffer::F32(vec![
                            0.2, 0.0, 1.0, 0.2, 0.0, 1.0, 0.0, 1.0, 0.1, 0.0, 1.0, 0.1, 0.2, 0.0,
                            1.0, 0.2, 0.0, 1.0, 0.0, 1.0, 0.1, 0.0, 1.0, 0.1,
                        ]),
                    }),
                    Attribute::DataArray(DataArrayBase {
                        name: String::from("mtl_id"),
                        elem: ElementType::Generic(1),
                        data: IOBuffer::I32(vec![1, 1, 1, 1, 1, 1, 1, 1]),
                    }),
                ],
                cell: vec![Attribute::DataArray(DataArrayBase {
                    name: String::from("mtl_id"),
                    elem: ElementType::Scalars {
                        num_comp: 1,
                        lookup_table: None,
                    },
                    data: IOBuffer::I32(vec![0, 0, 0, 0, 0, 0]),
                })],
            },
        }),
    }
}

#[test]
fn box_parse_xml() -> Result {
    let input: &[u8] = include_bytes!("../assets/box.vtu");
    let vtk = Vtk::parse_xml(BufReader::new(input))?;
    assert_eq!(vtk, make_box_vtu());
    Ok(())
}

#[test]
fn box_import() -> Result {
    let mut vtk = Vtk::import("./assets/box.vtu")?;
    vtk.file_path = None; // erase file path before comparison.
    assert_eq!(vtk, make_box_vtu());
    Ok(())
}

fn make_box_para_vtu() -> Vtk {
    Vtk {
        version: Version { major: 1, minor: 0 },
        title: String::new(),
        byte_order: ByteOrder::LittleEndian,
        file_path: None,
        data: DataSet::inline(UnstructuredGridPiece {
            points: IOBuffer::F64(vec![
                0.5208333134651184,
                -0.5,
                0.5,
                -0.5208333134651184,
                -0.5,
                0.5,
                0.5208333134651184,
                0.5,
                0.5,
                -0.5208333134651184,
                0.5,
                0.5,
                -0.5208333134651184,
                -0.5,
                -0.5,
                0.5208333134651184,
                -0.5,
                -0.5,
                -0.5208333134651184,
                0.5,
                -0.5,
                0.5208333134651184,
                0.5,
                -0.5,
            ]),
            cells: Cells {
                cell_verts: VertexNumbers::XML {
                    connectivity: vec![
                        0, 1, 3, 2, 4, 5, 7, 6, 6, 7, 2, 3, 5, 4, 1, 0, 5, 0, 2, 7, 1, 4, 6, 3,
                    ],
                    offsets: vec![4, 8, 12, 16, 20, 24],
                },
                types: vec![CellType::Polygon; 6],
            },
            data: Attributes {
                point: vec![
                    Attribute::scalars("mtl_id", 1)
                        .with_data(IOBuffer::I32(vec![1, 1, 1, 1, 1, 1, 1, 1])),
                    Attribute::DataArray(DataArrayBase {
                        name: String::from("Cd"),
                        elem: ElementType::Vectors,
                        data: IOBuffer::F32(vec![
                            0.2, 0.0, 1.0, 0.2, 0.0, 1.0, 0.0, 1.0, 0.1, 0.0, 1.0, 0.1, 0.2, 0.0,
                            1.0, 0.2, 0.0, 1.0, 0.0, 1.0, 0.1, 0.0, 1.0, 0.1,
                        ]),
                    }),
                    Attribute::generic("pressure", 1).with_data(IOBuffer::F32(vec![
                        -0.5, -0.5, 0.5, 0.5, -0.5, -0.5, 0.5, 0.5,
                    ])),
                ],
                cell: vec![Attribute::DataArray(DataArrayBase {
                    name: String::from("mtl_id"),
                    elem: ElementType::Scalars {
                        num_comp: 1,
                        lookup_table: None,
                    },
                    data: IOBuffer::I32(vec![0, 0, 0, 0, 0, 0]),
                })],
            },
        }),
    }
}

#[test]
fn box_para_parse_xml() -> Result {
    let input: &[u8] = include_bytes!("../assets/box_para.vtu");
    let vtk = Vtk::parse_xml(BufReader::new(input))?;
    assert_eq!(vtk, make_box_para_vtu());
    Ok(())
}

fn make_hexahedron_vtu() -> Vtk {
    Vtk {
        version: Version { major: 1, minor: 0 },
        title: String::new(),
        byte_order: ByteOrder::LittleEndian,
        file_path: None,
        data: DataSet::inline(UnstructuredGridPiece {
            #[rustfmt::skip]
            points: IOBuffer::F32(vec![
                0.0, 0.0, 0.0,
                0.0, 0.0, -1.0,
                0.0, 1.0, 0.0,
                0.0, 1.0, -1.0,
                1.0, 0.0, 0.0,
                1.0, 0.0, -1.0,
                1.0, 1.0, 0.0,
                1.0, 1.0, -1.0
            ]),
            cells: Cells {
                cell_verts: VertexNumbers::XML {
                    connectivity: vec![0, 4, 5, 1, 2, 6, 7, 3],
                    offsets: vec![8],
                },
                types: vec![CellType::Hexahedron; 1],
            },
            data: Attributes {
                point: vec![],
                cell: vec![],
            },
        }),
    }
}

#[test]
fn hexahedron_appended() -> Result {
    let mut vtu = Vtk::import("./assets/hexahedron.vtu")?;
    vtu.file_path = None; // Reset file path to satisfy comparison
    assert_eq!(vtu, make_hexahedron_vtu());
    Ok(())
}

#[test]
fn hexahedron_pvtu() -> Result {
    let mut vtu = Vtk::import("./assets/hexahedron_parallel.pvtu")?;
    vtu.load_all_pieces().unwrap();
    vtu.file_path = None; // Reset file path to satisfy comparison
    assert_eq!(vtu, make_hexahedron_vtu());
    Ok(())
}

#[cfg(feature = "compression")]
#[test]
fn hexahedron_lzma_pvtu() -> Result {
    let mut vtu = Vtk::import("./assets/hexahedron_parallel_lzma.pvtu")?;
    vtu.load_all_pieces().unwrap();
    vtu.file_path = None; // Reset file path to satisfy comparison
    assert_eq!(vtu, make_hexahedron_vtu());
    Ok(())
}

#[cfg(feature = "compression")]
#[test]
fn hexahedron_zlib() -> Result {
    let mut vtu = Vtk::import("./assets/hexahedron_zlib.vtu")?;
    vtu.file_path = None; // Reset file path to satisfy comparison
    assert_eq!(vtu, make_hexahedron_vtu());
    Ok(())
}

#[cfg(feature = "compression")]
#[test]
fn hexahedron_zlib_binary() -> Result {
    let mut vtu = Vtk::import("./assets/hexahedron_zlib_binary.vtu")?;
    vtu.file_path = None; // Reset file path to satisfy comparison
    assert_eq!(vtu, make_hexahedron_vtu());
    Ok(())
}

#[cfg(feature = "compression")]
#[test]
fn hexahedron_lz4() -> Result {
    let mut vtu = Vtk::import("./assets/hexahedron_lz4.vtu")?;
    vtu.file_path = None; // Reset file path to satisfy comparison
    assert_eq!(vtu, make_hexahedron_vtu());
    Ok(())
}

#[test]
fn hexahedron_binary() -> Result {
    let mut vtu = Vtk::import("./assets/hexahedron_binary.vtu")?;
    vtu.file_path = None; // Reset file path to satisfy comparison
    assert_eq!(vtu, make_hexahedron_vtu());
    Ok(())
}

fn make_tet_vtu() -> Vtk {
    Vtk {
        version: Version { major: 1, minor: 0 },
        title: String::new(),
        byte_order: ByteOrder::LittleEndian,
        file_path: None,
        data: DataSet::inline(UnstructuredGridPiece {
            #[rustfmt::skip]
            points: IOBuffer::F64(vec![
		0.0, 1.0, 0.0,
		-0.9428102970123291, -0.3333297073841095, 0.0,
		0.47140514850616455, -0.3333297073841095, 0.8164976239204407,
		0.47140514850616455, -0.3333297073841095, -0.8164976239204407,
            ]),
            cells: Cells {
                cell_verts: VertexNumbers::XML {
                    connectivity: vec![3, 1, 0, 2],
                    offsets: vec![4],
                },
                types: vec![CellType::Tetra; 1],
            },
            data: Attributes {
                point: vec![Attribute::DataArray(DataArrayBase {
                    name: String::from("pressure"),
                    elem: ElementType::Scalars {
                        num_comp: 1,
                        lookup_table: None,
                    },
                    data: IOBuffer::F32(vec![0.0, -0.9428103, 0.47140515, 0.47140515]),
                })],
                cell: vec![Attribute::DataArray(DataArrayBase {
                    name: String::from("mtl_id"),
                    elem: ElementType::Scalars {
                        num_comp: 1,
                        lookup_table: None,
                    },
                    data: IOBuffer::I32(vec![1]),
                })],
            },
        }),
    }
}

#[test]
fn single_tet_vtu() -> Result {
    let mut vtu = Vtk::import("./assets/tet.vtu")?;
    vtu.file_path = None; // Reset file path to satisfy comparison
    assert_eq!(vtu, make_tet_vtu());
    Ok(())
}