未正确读取VTK文件(*.vtu)

Question

我创建的VTK文件没有被ParaView加载，我遇到了问题。该文件看起来很好，我看不到任何明显的错误，但是ParaView在试图查看数据时会抛出以下警告。

ERROR: In C:\glr\builds\paraview\paraview-ci\build\superbuild\paraview\src\VTK\Common\Core\vtkPoints.cxx, line 166
vtkPoints (0000019324F41DF0): Number of components is different...can't set data

ERROR: In C:\glr\builds\paraview\paraview-ci\build\superbuild\paraview\src\VTK\IO\XML\vtkXMLReader.cxx, line 922
vtkXMLUnstructuredGridReader (0000019325100BE0): Array has 0 allocated elements, but 60 were requested to be read

ERROR: In C:\glr\builds\paraview\paraview-ci\build\superbuild\paraview\src\VTK\IO\XML\vtkXMLUnstructuredDataReader.cxx, line 504
vtkXMLUnstructuredGridReader (0000019325100BE0): Cannot read points array from Points in piece 0.  The data array in the element may be too short.

下面是一个带有20分和一些相关标量的非结构化网格的简单测试文件。希望有人能发现问题。

<?xml version="1.0"?>
<VTKFile type="UnstructuredGrid" version="1.0" byte_order="LittleEndian" header_type="UInt64">
  <UnstructuredGrid>
    <Piece NumberOfCells="20" NumberOfPoints="20">
      <Points>
        <DataArray Name="points" type="Float64" format="ascii" NumberofComponents="3">
          0.9191090317991818 0.4523130130592968 0.9191090317991818 0.6421955999238554 0.1757747380313244 0.6421955999238554
          0.7537122297291767 0.0493769993144870 0.7537122297291767 0.1393145681027350 0.2924753386949548 0.1393145681027350
          0.0873195479896001 0.0667991310914613 0.0873195479896001 0.7880020580364918 0.7511564859911245 0.7880020580364918
          0.3261509370344888 0.0637715240806562 0.3261509370344888 0.5410678214759677 0.4319083194117714 0.5410678214759677
          0.2402351758680060 0.3641724134430167 0.2402351758680060 0.5454229255759049 0.1519715256925609 0.5454229255759049
          0.4005545036798892 0.5467103397159158 0.4005545036798892 0.7151918872797569 0.4432930376023336 0.7151918872797569
          0.8366799410811948 0.0360613100029110 0.8366799410811948 0.5884811425466829 0.8228931912295053 0.5884811425466829
          0.2961545640333596 0.2732926831299841 0.2961545640333596 0.2810176906539642 0.1689852192728417 0.2810176906539642
          0.7055972446574292 0.6443697547109174 0.7055972446574292 0.4225964301897521 0.1075410788025926 0.4225964301897521
          0.0573159852472062 0.3532450981171027 0.0573159852472062 0.7470273067071216 0.3857036581156064 0.7470273067071216
        </DataArray>
      </Points>
      <Cells>
        <DataArray Name="connectivity" type="Int32" format="ascii" NumberofComponents="1">
          0 1 2 3 4 5
          6 7 8 9 10 11
          12 13 14 15 16 17
          18 19
        </DataArray>
        <DataArray Name="offsets" type="Int32" format="ascii" NumberofComponents="1">
          0 1 2 3 4 5
          6 7 8 9 10 11
          12 13 14 15 16 17
          18 19
        </DataArray>
        <DataArray Name="types" type="UInt8" format="ascii" NumberofComponents="1">
          1 1 1 1 1 1
          1 1 1 1 1 1
          1 1 1 1 1 1
          1 1
        </DataArray>
      </Cells>
      <PointData Scalars="1_temp">
        <DataArray Name="1_temp" type="Float64" format="ascii" NumberofComponents="1">
          0.4204270035661765 0.9490145030363609 0.7864711816566549 0.4815468959885630 0.0119215535827562 0.0597207807092479
          0.8257177483439162 0.4046369872739349 0.0531531123171690 0.2596390482071086 0.2811506610562717 0.9433030410624577
          0.8936293596271191 0.2022892694899581 0.1003608087345019 0.5730430655359530 0.7453773741488717 0.6007604785160442
          0.9092395428890321 0.9385777624120453
        </DataArray>
        <DataArray Name="2_pressure" type="Float64" format="ascii" NumberofComponents="1">
          0.5890720970505128 0.3268986086578718 0.1448144482177102 0.2576384903723663 0.8574458883976873 0.6839737520406283
          0.9986326035811655 0.3194556656082242 0.4534082266242594 0.8676221777748950 0.6385221808378060 0.3318923019829476
          0.5419776327479333 0.1123238088406830 0.8165234436255825 0.2209316463478144 0.5149742681090496 0.5260877679247680
          0.2770886884732112 0.9044206316605501
        </DataArray>
      </PointData>
    </Piece>
  </UnstructuredGrid>
</VTKFile>

Answer 1

对于任何可能遇到这种情况的人来说，答案都是微不足道的-- <DataArray> attribute应该是NumberOfComponents。注意到资本化！