New Particle Track Features Since Version 3.54

• New Dialogs for control of Particle Track display
• Enhanced TRACK Commands
• Selection and Display of Events: Interactions, Creations, Terminations, Surface Crossings, and Bank Events
• Wide selection of Event Markers
• Recognize all types of events that come from MCNP
• User can specify how many global filters in effect must be satisfied to select history (FMODE)
• Sabrina checks to see if the viewpoint is outside of the bounding box defined by the extent of the tracks. If it is not, a warning is given:

  ' Tracks may extend beyond Viewpoint and be drawn incorrectly'

• A warning is given if a filter is specified but the corresponding information is not on the ptrac file
• Improved handling of histories with multiple branches
• Deletion of points on a track which are closer together than a user specified value
• Coloring of tracks by particle type
• Specification of a single color for tracks
• TRACK DOTS works correctly --- pixel colored at each event on file
• Filtering by minimum, maximum, or exact number of collisions
• Bounding box enclosing tracks computed, and can be used to set spatial WINDOW
• STEP mode for adding histories as user hits return
• An option to explicitly open the PTRAC in ASCII (formatted) mode has been added. This option is necessary on SGI workstations where the strategy for recognizing an ascii file does not work.
  TRACK FILE ASCII filename
• Warning is given if more points are in a track than the code buffer can hold and a global filter is in effect
• Number of type of events found on a file given on TRACK INFO
• CREATION type and TERMINATION type filter added
• User choice of whether extent of tracks enters into line drawing scale (FRAME)
• Tracks are plotted as they are computed in order to give the appearance of motion, rather than being written to a file and displayed all at once. (User can revert to that old style.)
• Track command mode --- track prompt, to save typing TRACK in front of track commands
• More history navigation commands:
  Back, Forward, and number
• TRACK PLOT draws tracks and/or events without geometry
• TRACK RESET resets bounds, events, filters or everything
• TRACK RESOLUTION settings for dealing with hidden track segments
• TRACK WINDOW setting to determine whether to use Spatial WINDOW to clip tracks
• TRACK LIST reflects new features and has revised formatting
• Drawing of individual pixels and ellipses added for particle track graphics

Attention MCNP4A users who want Particle Tracks

Last modified: September, 2004

Kenneth A. Van Riper / email