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CHAPTER 1
INTRODUCTION
Every day of your computing life, you reach out for the mouse whenever you
want to move the cursor or activate something. The mouse senses your motion and
your clicks and sends them to the computer so it can respond appropriately. An
ordinary mouse detects motion in the X and Y plane and acts as a two dimensional
controller. It is not well suited for people to use in a 3D graphics environment. Space
Mouse is a professional 3D controller specifically designed for manipulating objects
in a 3D environment. It permits the simultaneous control of all six degrees of
freedom - translation rotation or a combination. . The device serves as an intuitive
man-machine interface
The predecessor of the spacemouse was the DLR controller ball.
Spacemouse has its origins in the late seventies when the DLR (German Aerospace
Research Establishment) started research in its robotics and system dynamics
division on devices with six degrees of freedom (6 dof) for controlling robot grippers
in Cartesian space. The basic principle behind its construction is mechatronics
engineering and the multisensory concept. The spacemouse has different modes of
operation in which it can also be used as a two-dimensional mouse.
Space Mouse
CHAPTER 2
How does computer mouse work?
Mice first broke onto the public stage with the introduction of the Apple Macintosh
in 1984, and since then they have helped to completely redefine the way we use
computers. Every day of your computing life, you reach out for your mouse
whenever you want to move your cursor or activate something. Your mouse senses
your motion and your clicks and sends them to the computer so it can respond
appropriately
2.1 Inside a Mouse
The main goal of any mouse is to translate the motion of your hand into signals that
the computer can use. Almost all mice today do the translation using five
components:
Fig.1 The guts of a mouse
1. A ball inside the mouse touches the desktop and rolls when the mouse moves.
Space Mouse
Fig 2
The underside of the mouse's logic board: The exposed portion of the ball touches
the desktop.
2. Two rollers inside the mouse touch the ball. One of the rollers is oriented so that
it detects motion in the X direction, and the other is oriented 90 degrees to the
first roller so it detects motion in the Y direction. When the ball rotates, one or
both of these rollers rotate as well. The following image shows the two white
rollers on this mouse: