在X轴上从X_Y_Z(单独的数据集)可视化三维网格，而无需使用xdmf [英] Visualization of 3-dimensional grid from X_Y_Z(seperate datasets) on Paraview without using xdmf

问题描述

我曾经使用 xdmf 脚本来解析netcdf文件，以创建上取景.最重要的是，我正在添加标量或矢量字段. (因此3DSMesh提供了物理坐标).

I used to parse netcdf files with an xdmf script in order to create 3DSMesh on paraview. On top of it, I was adding scalar or vector fields. (So 3DSMesh provides physical coordinates).

我从来没有，尽管实际上这是最好的方法.可以，所以我还可以. 请让我知道是否有更方便的方法.

我可以使用以下脚本创建3维网格.

I am able to create a 3-dimensional grid with the following script.

<?xml version="1.0" ?>
<!DOCTYPE Xdmf SYSTEM "Xdmf.dtd" []>
<Xdmf xmlns:xi="http://www.w3.org/2001/XInclude" Version="2.0">
   <Domain>
      <Grid Name="gridxyz">
        <Topology TopologyType="3DSMesh" NumberOfElements="0032 0032 0063">
        </Topology>
<!-- Read Coordinates -->
        <Geometry GeometryType="X_Y_Z">
           <DataItem Name="X" Format="HDF" NumberType="Float" Precision="8" Dimensions="0032 0032 0063">
                       grid_x.nc:/gridx
           </DataItem>
           <DataItem Name="Y" Format="HDF" NumberType="Float" Precision="8" Dimensions="0032 0032 0063">
                       grid_y.nc:/gridy
           </DataItem>
           <DataItem Name="Z" Format="HDF" NumberType="Float" Precision="8" Dimensions="0032 0032 0063">
                       grid_z.nc:/gridz
           </DataItem>
        </Geometry>
<!-- Read Scalar -->
<!-- Here I have bunch of scalars stored in different netcdf files -->
     </Grid>
   </Domain>
</Xdmf>

专业人士

当有人需要重复的任务时，
• xdmf脚本非常有用.

Pros

• xdmf scripts are great when someone needs repetitive tasks.

• 此脚本需要以某种方式生成或手动键入.并且需要在尺寸或变量名称更改时进行更新

• this script(s) needs to be generated somehow, or typed by hand. And required to be updated, when the dimensions or variable names are changed

如果要读取其他标量，则需要添加一行

if I want to read another scalar, I need to add a line

最近我意识到，我可以通过单击open(Paraview4.3)来打开带有paraview的netcdf文件.因此，(几年前，我无法在Paraview上打开netcdf文件)，我不再需要这些xdmf脚本了.

Recently I realize, I can open netcdf files with paraview just by clicking open(Paraview4.3). So, I do not need these xdmf scripts anymore (few years ago I was not able to open netcdf files on Paraview).

如何通过Paraview GUI创建3DSMesh.那可能吗?还是有其他简单/快速的方法(而不是编写python脚本)? 有什么办法读取1D坐标并使用它们创建3D几何?

How can I create 3DSMesh via Paraview GUI. Is that possible? Or is there any other simple/faster way (instead of writing a python script) ? Is there any way read 1D coordinates and create 3D geometry using them ?

推荐答案

这就是我设法做到的方式.当然，这不是最快的方法，但是对我有用.

That's how I manage to do that. Certainly it's not the fastest way, but it works for me.

当您打开NetCDF文件时，paraview会要求您选择阅读器，我总是使用 NetCDF文件通用和CF约定.

When you open a NetCDF file, paraview asks you to choose a reader, I always use NetCDF files generic and CF conventions .

此后，在点击应用"按钮之前，您必须在下拉菜单中选择适当的尺寸" .

After that, before hitting "Apply" button you have to select the appropriate "Dimensions" in the dropdown menu.

您的数据现在必须显示为UniformGrid，数据(X，Y，Z)作为标量字段，因此您必须转换为 grid 才能更具体地使用StructuredGrid.为此，请应用"ImageDataToPointSet" 过滤器.

Your data now must be displayed as a UniformGrid, with your data(X,Y,Z) as scalars fields so you must transform to a grid to be more specific a StructuredGrid. In order to do that, apply the "ImageDataToPointSet" filter.

然后，应用计算器" 过滤器 选中坐标结果" 字段，然后执行以下操作:

After that, apply a "Calculator" filter check "Coordinate Results" field and do the following:

如果您的数据显示为计算器字段中的X，Y，Z列

If your data appears as X, Y , Z colummns put in the calculator field the expression

(X * iHat)+(Y * jHat)+(Z * kHat)

如果您的数据以其他名称显示，请用这些名称替换x，y，z

if your data appears with other names, substitute x, y, z with those names

表达式表示x沿î向量的方向，y沿j向量的方向，依此类推

The expression means that x is in the direction of the î vector, y is in the direction of the j vector and so on

希望有帮助！

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