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[GTVL\]CHANGE Item SegName Value [Val2 [Val3]]
[GTVL\]CHANGE Behaviour Value
Changes some attribute of the Graphic Library. Two items concern the
current directory and active windows:
- CHANGE DIRECTORY [DirName [WinNum]]
changes the default directory to DirName (default is to change to
the top directory), and optionally the active window number to
WinNum (instead of 1) within this directory. The current working
directory is stored as a character string in the SIC variable
- CHANGE WINDOW WinNum|ZOOM
changes the active window number to WinNum or to the ZOOM window.
The active window is in particular the one in which the cursor ap-
pears for commands which use it.
Some other items are image segment attributes:
- CHANGE SCALING SegName LIN|LOG [Lcut [Hcut]]
will change the transfer function for the specified image segment.
- CHANGE BLANKING SegName BLACK|WHITE|Colour
will change the colour of blanked pixels (if any) in the displayed
image. Colour is a colour value as in PENCIL command (1-8).
- CHANGE COLOUR SegName Value
- CHANGE DASH SegName Value
- CHANGE DEPTH SegName Value
- CHANGE VISIBILITY SegName ON|OFF
- CHANGE WEIGHT SegName Value
The last five items are general segment attributes. For these, if Seg-
Name is a segment, only that segment is modified, but if it is a direc-
tory, all segments attached to this directory are modified accordingly.
See subtopic SEGMENT_NAMES for details on naming segments.
And finally, some general behaviours can be changed will the following
- CHANGE LUT STATIC|DYNAMIC
toggles the Look-Up-Tables to STATIC or DYNAMIC mode. Default is
DYNAMIC. See subtopic LUT for details.
- CHANGE PENCIL HARD|SOFT
specifies whether the GTV library should use the (output depen-
dent) hardware generator for dashes and thickness, or whether it
should use its own (output independent) software emulation. Hard-
ware generator may (or may not) produce nicer output, and may be
- CHANGE POSITION
changes the window position on the screen. See subtopic for de-