transformer(1) Geometry Center (August 16 1992) transformer(1)
NAME
transformer - Tool for manipulating geomview transforms.
SYNOPSIS
transformer
DESCRIPTION
Transformer is a tool to manipulate the wrap transforms of
geomview objects. When transformer is started, it will read
in the wrap transform of the target object. The transform
will be displayed at the top of the panel.
The displayed transform may at any time be set to the wrap
transform of the geomview target object by pressing the
"Read" button at the bottom of the panel. Note that the
transform does not automatically update whenever the target
object moves. The transform may also be set to the identity
by pressing the "Identity" button at the bottom of the
panel.
The transform may also be applied to the geomview target
object by pressing the "Apply" or "Set" button. The "Apply"
button will cause the current wrap transform of the current
target object to be postmultiplied by the displayed
transform. The "Set" button will cause the wrap transform
of the target to be replaced by the transform. Note that
the transform of the geomview target is not updated
automatically when the transform displayed in the panel
changes.
The displayed transform may be modified directly by changing
the numbers in the matrix. In addition, a rotation,
translation, or scale may be applied to the object. To
rotate the object, enter the appropriate number of degrees
or radians in the input field next to the "Degrees" buttons
and press the "Rotate" button. The displayed transform will
then be postmultiplied by a rotation matrix of the requested
amount about the specified axis. In a similar fashion, the
translate and scale sections of the panel may be used to
update the transform.
All operations are Euclidean.
The following keyboard shortcuts apply:
R Rotate
T Translate
S Scale
a or Space Apply
Return Set
r Read
i Identity
q Quit
Page 1 (printed 12/22/98)
transformer(1) Geometry Center (August 16 1992) transformer(1)
BUGS
The transform is read from the current target when the
program begins or the read button is pressed. The transform
of the current target is modified by or set to the displayed
transform when the "Apply" or "Set" button is pressed.
There is no check that the user has not changed the geomview
target between these two operations. Although the results
of such an operation will be correct according to the
specifications in this man page, the results may be
unexpected.
AUTHOR
Celeste Fowler email: fowler@geom.umn.edu
The Geometry Center phone: (612) 626-8304
1300 South Second Street
Minneapolis, MN 55454
Page 2 (printed 12/22/98)
