what is the
importance
of point and draw
devices ?
explain auf
Two Points and draw
olevices
in detail
Answers
Answer:
A pointingdevice is an input interface that allows a user to input spatial (i.e., continuous and multi-dimensional) data to a computer. ... Movements of the pointing device are echoed on the screen by movements of the pointer (or cursor) and other visual changes
pointing device is an input interface (specifically a human interface device) that allows a user to input spatial (i.e., continuous and multi-dimensional) data to a computer. CAD systems and graphical user interfaces (GUI) allow the user to control and provide data to the computer using physical gestures by moving a hand-held mouse or similar device across the surface of the physical desktop and activating switches on the mouse. Movements of the pointing device are echoed on the screen by movements of the pointer (or cursor) and other visual changes. Common gestures are point and click and drag and drop.
Touchpad and a pointing stick on an IBM notebook
While the most common pointing device by far is the mouse, many more devices have been developed. However, the term "mouse" is commonly used as a metaphor for devices that move the cursor.
For most pointing devices, Fitts's law can be used to predict the speed with which users can point at a higher speed.
Classification
To classify several pointing devices, a certain number of features can be considered. For example, the device's movement, controlling, positioning or resistance. The following points should provide an overview of the different classifications.
direct vs. indirect input
In case of a direct-input pointing device, the on-screen pointer is at the same physical position as the pointing device (e.g., finger on a touch screen, stylus on a tablet computer). An indirect-input pointing device is not at the same physical position as the pointer but translates its movement onto the screen (e.g., computer mouse, joystick, stylus on a graphics tablet).
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