The tumbler window displays a projected view of a rectangular portion
of the image volume. The subset is initially a small cube but the size
can be changed with the X, Y and Z spin button controls. The volume
can be rotated with the keypad arrow keys just as in 3dmodv.
The intensity adjustment of the projected image may not work very well. If the
image appears saturated, spread out the Black and White sliders
in the Information window.
If data have been loaded into the program as 16-bit integers instead of bytes,
they are first converted to bytes using the scaling determined by the
the Low and High sliders in the Info window. For best results,
be sure that the Low and High sliders are set so that images
have a good contrast with a
fairly wide range between the Black and White sliders.
The zoom spin box lets you increase, decrease, or type in a zoom
The checkerboard toggles between low resolution rendering with
nearest-neighbor interpolation and high-resolution rendering with
The lock button will lock the X/Y/Z position of the volume.
The X, Y, and Z spin controls allow you to change the size of any
dimension of the volume.
The Black and White threshold sliders allow you to cut out
extraneous image material by setting all pixels in the volume with
values below the black threshold to 0, and all pixels with values above
the white threshold to 255.
Hot Keys Specific to the Tumbler Window
Toggle stereo mode.
Toggle display of bounding box.
Decrease/Increase zoom factor.
Decrease/Increase black threshold level.
Decrease/Increase white threshold level.
Decrease/Increase angular increment when rotating.
Make TIFF snapshot of image in window.
Make snapshot of window with primary non-TIFF format.
Make snapshot with second non-TIFF format.
Keypad up and down arrows rotate the volume around the X
Keypad left and right arrows rotate the volume around the Y
Keypad PgUp and PgDn rotate the volume around the Z axis.
All other keys that are common to image display windows perform their
normal functions; see 3dmod Hot Keys.