
XPRISM3(CONTOUR)             Khoros              XPRISM3(CONTOUR)

     OVERVIEW

     Selections on this pane allow the user to set the number and
     intervals of contours for 2D and 3D contour plots.  If more
     than one plot is displayed in the plot window, the user will
     be prompted for a single plot on which the operation should
     be performed.

     SET Contour Info:
          This option prints out the following current contour
          settings for a selected plot.

               Minimum Z Data Value
               Maximum Z Data Value
               Number of Contours
               Minimum Contour Value
               Maximum Contour Value
               Contour Offset

          If only one plot is displayed in the plot window, the
          settings of that plot are automatically displayed.  If
          more than one plot is displayed, the user will be
          prompted for which plot information is to be read in.

     Contour Settings:
          The user has the option to set the following four con-
          tour attributes.

          Number of Contours
               Specifies the total number of contours that will
               be generated for a plot.

          Minimum Level
               Specifies at what value the lowest valued contour
               will be drawn.  By default, the minimum level is
               set to the minimum contour value read in by the
               SET Contour Info function.

          Maximum Level
               Specifies at what value the upper contour will be
               drawn.  By default, the maximum level is set to
               the maximum contour value read in by the SET Con-
               tour Info function.

          Contour Offset
               Specifies an offset for the entire contour plot.
               For example, an offset of 10 will shift the con-
               tour 10 positive units from the minimum.  Since
               this shifts the entire contour plot, the user may
               want to respecify the min/max level settings.
               Changing offset will also cause a shifting of the
               contour color cycle.

          Note: Changes made to the contour settings only take
          effect after executing the GENERATE Contours Automati-
          cally, or SPECIFY Contours Manually options.

     GENERATE Contours Automatically:
          This option will generate contours automatically using
          the values specified in Contour Settings.  If more than
          one plot is displayed in the plot window, new contour
          levels will be generated only for the plot selected
          from the pop-up query window. Contours are generated
          using the following equations.

               interval = (max_level - min_level)/num_contours

               contour level value =
                    min_level + interval * level_num + offset

     SPECIFY Contours Manually:
          This option allows the user to specify all contours
          individually.  When the user clicks on the SPECIFY Con-
          tours Manually button, a list of all of the contours
          (specified by Number of Contours option) is displayed.
          The initial contour values in this list are generated
          using the same equations that are used by the GENERATE
          Contours Automatically option.  The user can edit this
          list to set specific contour levels.  If more than one
          plot is displayed in the plot window, new contour lev-
          els will be generated only for the plot selected from
          the pop-up query window.

     RESET Default Contours:
          This option resets the default contours on the selected
          plot.

     PLOT Contour 3D:
          PLOT Contour 3D redraws the selected plot as a 3D con-
          tour plot.  Note that if changes have been made to the
          contour attribute values, the GENERATE Contours
          Automatically, or SPECIFY Contours Manually option must
          first be executed to make the changes take effect.

     PLOT Contour 2D:
          PLOT Contour 2D redraws the selected plot as a 2D con-
          tour plot (a projection of the contours onto the X-Y
          plane).  Note that if changes have been made to the
          contour attribute values, the GENERATE Contours
          Automatically, or SPECIFY Contours Manually option must
          first be executed to make the changes take effect.

          Copyright 1992, University of New Mexico. All rights
          reserved.

Khoros                    Release: 1.0                          1

