Loading Particle and Geometry Data

2.1 Types of File Formats IViPP Can Read

IViPP can currently read particle and geometry data from the following file types:

• MCNP/MCNPX Summary (MCNP’s Table 110 is extracted from the file and loaded into IViPP)
• MCNP/MCNPX Ptrac
• MCNP/MCNPX Geometry (from MCNP input file)
  • see section 3.2 for details about which geometries can be read
• TRIM Transmit
• TRIM Range
• TRIM Collision

In addition to the above file types, two experimental file formats are under study:

• One that presents scalar values associated with points in space
• One for a custom “tallyx” output from MCNP that presents particles’ final positions, energies, and the number of collision events they have experienced.

Neither of these formats is publicly documented.

2.2 Loading Data from Files

To load particle or geometry data from a file, use the “Open” command from IViPP’s “File” menu. This command produces a dialog with which to choose the file to open, as shown in figure 2.1.

Figure 2.1. IViPP’s “Open File” dialog.

The “Open File” dialog mostly works like similar dialogs in other applications do. Note, however, the following special features:

• The “File Type” drop-down menu lets you select what format the file is in. The supported file formats are listed in section 2.1.
• If the “Append to current database” box is checked, the data in the file will be added to the data already in IVIPP’s database; IViPP will then display both the new and previous data. Use this option, for example, to display a file of particle data in the context of geometry loaded from a different file. If “Append to current database” is not checked, the database will be cleared, and the newly opened file’s data will be the only thing displayed.
• Checking the “Save tools” box will preserve any selectors and clipping planes that you have open so that you can use them with the newly opened file. If this box is not checked, any existing selectors or clipping planes will be destroyed before opening the new file. See section 4.2 and chapter 5 for information on what clipping planes and selectors are.

Note that the title of the main display window always indicates which files are currently loaded into the database.

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