The Clip filter (which utilizes vtkPVClipDataSet) clips a data set with an implicit plane, sphere, box, or with scalars. The output type of data is an unstructured grid. Unlike a cutting plane, which reduces the dimensionality of the data, clipping does not reduce the dimensionality. It allows the user to clip away a section of the data to see inside the volume. To generate clipping planes/spheres/boxes:
- First the user selects the data they wish to operate on from the Selection Window. It will be highlighted when this occurs.
- The user can then select Filter->Alphabetical->Clip from the main menu, or click on the Clip Button. This will open the Clip filter interface.
- In the Clip Function Section the
user can select the position of the clip. The clipping
surface can be a plane, a sphere, a box, or scalars.
- The location of the plane is changed by editing the X, Y, and Z values of the center. The orientation of the plane is changed by changing the normal direction.
- The location of the sphere is changed by editing the X, Y, and Z values of the center. The size of the sphere is dictated by the radius. Two other options available are to show the sphere itself (with the Visibility checkbox) and to reverse the cutting function of the sphere (with the Inside Out checkbox).
- The location of the box is changed by editing the Translate, Scale, and Orientation values. Two other options available are to show the box itself (with the Visibility checkbox) and to reverse the cutting function of the box (with the Inside Out checkbox).
- The scalar clipping function is similar to creating an isosurface except that where an isosurface is one value only, the scalar clipping function contains all those values below (or above if the Inside Out checkbox is checked) the clipping value.
- The Apply button must be pressed before any cutting planes or spheres will be generated.
- The color attributes of the cutting plane|sphere can be changed as is detailed in the Coloring Data in ParaView Section.