DOS Drivers and Utilities
28
current drawing in your active viewport. It also gives you the ability to dynamically move to another
part of the drawing without having to cancel the function you are currently executing.
DLDBIGPIC
To call up the Big Picture, at the AutoCAD command line, type
DLDBIGPIC[Enter]
, or double click
the right mouse button or button 2 on your digitizer puck (if you haven't redefined your double click
BP Button). This brings up the BP on the display. Cross-hairs and a highlighted section indicate
which part of the whole drawing you are currently viewing - the size of the image is determined by the
AutoCAD logical drawing space being used, 15-Bit or 31-Bit. The selection or pick box has an X
through it. Move the mouse/digitizer around to locate your pick box. If you can't see a small box
moving, click the left mouse button (the pick button) to size down the pick area. In size mode, the
pick box has a right pointing arrow in it (-->). If the contents of the BP are too small to work with, you
may increase the size of the image in the window by pressing the
[+]
key on your numeric keypad.
This performs an incremental zoom within the BP. Likewise, pressing the
[-]
key reduces the size of
the contents of the BP. Pressing the
[Home]
and
[End]
keys puts the BP into its smallest and
largest size, respectively. The smallest BP size is defined as being exactly the same view as that in
the viewport referenced by the BP. The largest BP size is defined as the largest image possible
without causing a Regen.
The BP pick box is always proportioned to the proper aspect ratio for the current viewport. Clicking
the pick button again puts you back into the pick box move mode (X). This operation is very similar to
using the Zoom Dynamic feature of AutoCAD. Once you have positioned the pick box on the area
you would like displayed in the active viewport, click any button other than the pick button to initiate
the zoom, or press the
[Enter]
key. If you want to abort the operation, just hold any button down,
other than the pick button, until the BP disappears. You can also hit any key on the keyboard, other
than
[Enter]
, to cancel the BP. Note that the BP is updated with new drawing commands, but that
moves or erases do not update the image unless BPREFRESH is enabled. A DLDREFRESH or a
REGEN manually updates the BP with the current drawing changes.
DLDBPCACHE†
Enables or disables TurboDLDClassic
's
internal cache for BP features. This cache speeds up
TurboDLDClassic
's
Big Picture functions. DLDBPCACHE is normally disabled. Performance benefits
of the BP Cache vary from one graphics platform to the next. For example, on VGAs, the
performance benefit of the BP Cache is as little as 1%.
DLDBPDIM
Resizing and repositioning the BP can be accomplished by typing this command at the AutoCAD
prompt. DLDBPDIM allows you to tell the driver where you want the BP placed and how large you
want it to be. The size is limited to being between one-quarter and one-half the width of the display.
This command functions like the pan/zoom selection box in the BP, as far as positioning and
dimensioning goes. To abort, hold the right mouse button, or any other digitizer button, down until the
moving box disappears.
DLDBPFREEZE
Sets the Big Picture (BP) zoom definition area display options. DLDBPFREEZE toggles the Big
Picture Zoom Mode parameter in TurboDLDClassic
's
Expert Configuration Menu.
In a zoomed view of the static BP, as the current viewport is zoomed or panned, Float mode causes
the image in the BP to move around within the bird's-eye window, keeping the zoomed viewport area
fixed in the center of the bird's-eye. Freeze mode locks the current BP contents into place to provide
a better overall frame of reference.
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