问题
For rather long time I've used to work in Goldensoftware Surfer/Voxler. In this programs it's very easy to visualise table data. The scheme looks like this: data input (on this step I can specify x, y, z and a component - some physical field data)->gridding->contour/volume visualisation. But I can't find any clue how load data from table and then grid it in some way and then make a contour/volume render in Paraview. For example, I have a table:
X Y Z Rho
-135.25 185.25 282.84 2284.442
-135.25 114.75 282.84 954.951
-100 100 282.84 6825.375
-64.75 114.75 282.84 3640.483
-50 150 282.84 3745.877
...
14.75 35.25 400.00 2822.855
14.75 -35.25 400.00 6876.960
50 -50 400.00 1375.617
How can I make a regular 3D grid (for sake of definiteness by kriging method) of this data? And how can I then make a contour/volume render?
回答1:
The first step is reading your data into ParaView. ParaView can read in delimited text files as tables, which is essentially what you have. Assuming your data is in a .txt file, you can directly open the data. By default, the reader assumes that you have a comma delimiter (i.e. a csv file), but you can change it. In the properties panel after you have opened the file, change the Field Delimiter Characters from a comma to a space. Also, check the box next to Merge Consecutive Delimiters.
The data are loaded in a table structure, and ParaView will initially show it in a spreadsheet view. You can convert it to a 3D grid with one of a pair of filters. The first filter is Table To Points. You just select the x, y, and z columns and it will generate a set of discrete points in space. The second filter is Table To Structured Grid. In this filter you specify both the x, y, and z columns as well as the extent of a grid. It will then build a curvilinear grid of points based on the rows of data in the table.
来源：https://stackoverflow.com/questions/40510129/how-do-i-visualize-xyzfield-volume-data-stored-in-a-simple-table-in-paraview