Added tests for importing/exporting point clouds

assets/point_cloud.vtk

@@ -0,0 +1,17 @@
+# vtk DataFile Version 2.0
+PointCloud example
+ASCII
+
+DATASET POLYDATA
+POINTS 3 float
+0 0 0 1 0 0 0 0 -1
+
+VERTICES 3 6
+1 0
+1 1
+1 2
+
+POINT_DATA 3
+
+CELL_DATA 3
+

assets/point_cloud.vtp

@@ -0,0 +1 @@
+<VTKFile type="PolyData" version="1.0" byte_order="BigEndian" header_type="UInt64"><PolyData><Piece NumberOfPoints="3" NumberOfVerts="3"><Points><DataArray type="Float32" Name="Points" NumberOfComponents="3" format="binary" RangeMin="-1" RangeMax="1">AAAAAAAAACQAAAAAAAAAAAAAAAA/gAAAAAAAAAAAAAAAAAAAAAAAAL+AAAA=</DataArray></Points><Verts><DataArray type="UInt64" Name="connectivity" format="binary" RangeMin="0" RangeMax="2">AAAAAAAAABgAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAI=</DataArray><DataArray type="UInt64" Name="offsets" format="binary" RangeMin="1" RangeMax="3">AAAAAAAAABgAAAAAAAAAAQAAAAAAAAACAAAAAAAAAAM=</DataArray></Verts></Piece></PolyData></VTKFile>

tests/legacy.rs

@@ -1105,3 +1105,26 @@ fn triangle_vtkidtype_test() {
 
     test_b!(parse_be(in1) => out1);
 }
+
+#[test]
+fn point_cloud() -> Result {
+    let in1 = include_bytes!("../assets/point_cloud.vtk");
+    let vtk = Vtk {
+        version: Version::new_legacy(2, 0),
+        byte_order: ByteOrder::BigEndian,
+        title: String::from("PointCloud example"),
+        file_path: None,
+        data: DataSet::inline(PolyDataPiece {
+            points: vec![0.0f32, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, -1.0].into(),
+            verts: Some(VertexNumbers::Legacy {
+                num_cells: 3,
+                vertices: vec![1, 0, 1, 1, 1, 2],
+            }),
+            data: Attributes::new(),
+            ..Default::default()
+        }),
+    };
+    test_b!(parse_be(in1) => vtk);
+    test_b!(parse_be(Vec::<u8>::new().write_vtk(vtk.clone())?) => vtk);
+    Ok(())
+}

tests/xml.rs

@@ -333,6 +333,33 @@ fn hexahedron_lzma_inline_binary() -> Result {
     Ok(())
 }
 
+#[test]
+fn point_cloud() -> Result {
+    init();
+    let vtk = Vtk {
+        version: Version::new_xml(1, 0),
+        byte_order: ByteOrder::BigEndian,
+        title: String::from("PointCloud example"),
+        file_path: None,
+        data: DataSet::inline(PolyDataPiece {
+            points: vec![0.0f32, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, -1.0].into(),
+            verts: Some(VertexNumbers::Legacy {
+                num_cells: 3,
+                vertices: vec![1, 0, 1, 1, 1, 2],
+            }),
+            data: Attributes::new(),
+            ..Default::default()
+        }),
+    };
+    let path = "./assets/point_cloud.vtp";
+    let orig_vtkfile = vtkio::xml::VTKFile::import(path)?;
+    assert_eq!(
+        vtk.try_into_xml_format(vtkio::xml::Compressor::None, 0)?,
+        orig_vtkfile
+    ); // Checks that compression is the same.
+    Ok(())
+}
+
 #[cfg(feature = "binary")]
 #[test]
 fn hexahedron_binary() -> Result {