ParaViewGeo makes it possible to select specific cells, points or blocks from the datasets in a visualization, and the selection can be manually changed using the Selection Inspector, or even extracted from the original dataset by using one of the extraction filters.
Selecting Cells, Points and BlocksOptions for selecting cells, points and blocks from a dataset are available through the Edit menu, or directly from the Selection Controls toolbar. To select data, click on the appropriate Select option in the toolbar, and then drag the mouse in the render view to create a box around the data to capture. The Select On options will highlight data only on the visible surface of the datasets within the selection area, whereas the Select Through options will highlight all of the data within the selection area. The Select Block option is designed for use with multiblock datasets, and will select the blocks of data that are outlined. If multiple render windows are open, selecting cells, points or blocks will highlight the data in all render windows displaying that dataset.
Once an area is selected, the mouse defaults back to the Interact option so the camera controls are once again active, and the data points can be changed or extracted to create a new object using only the new set of data. To extract the data, use the extraction filters in the Filter menu (such as Extract Selection), and click on Copy Active Selection before applying the filter in the Object Inspector. To de-select the cells, points or blocks, click on any select option and then click anywhere in the render window. To visualize the point about selecting data only on visible surfaces, you can create a Box in the render window, and then rotate the box so that two surfaces are visible, while the third surface is pointed away from the camera. Choose the Select Points On option and drag a box around the corner shared by the three surfaces. The point will highlight in pink. If you now view that point in the spreadsheet view (see below), you will notice that two rows are highlighted, one for each of the surfaces visible to the camera. If you change the selection to Select Points Through and highlight the same point, the spreadsheet view will highlight three rows, one for each of the three planes.br>
Using the Selection InspectorThe Selection Inspector window displays information about the currently selected data, and allows you to manually make changes to the selection. With the top section you can actually change where the selection is coming from. The Current Object drop-down allows you to select the new object you want to create a selection on. Clicking on the Create Selection button clears the Selection Inspector Index and changes the Selected Object to the new object. The Active Selection section contains general information and controls for the active selection.
The next area of the Selection Inspector contains controls specific to the type of selection.
The Display Style section is found at the bottom of the Selection Inspector. There are three tabs to control the Selection, Cell Labels and Point Labels.
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