COMPUTER SCIENCE AND ENGINEERING
COMPUTER GRAPHICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Two-dimensional positioning device
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Three-dimensional positioning device
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Pointing device
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None of the mentioned
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Detailed explanation-1: -Explanation: Rollers and optical sensors are used to record the amount and direction of movement. Explanation: Trackball is two-dimensional positioning device.
Detailed explanation-2: -A trackball is a computer cursor control device used in many laptop computer keyboards and older versions of computer mice. The device comprises a ball held by a socket containing sensors to detect a rotation of the ball about two axes–like an upside-down mouse with a ball in it.
Detailed explanation-3: -Answer: (c) Spaceball Explanation: Spaceball is used for the three-dimensional positioning of the object.
Detailed explanation-4: -Answer: b Explanation: A two-dimensional plane is used for 2D transformations. Transformations are useful for modifying an object’s position, size, orientation, and shape, among other things.
Detailed explanation-5: -The correct answer is pointing input. A pointing device is an input interface that allows a user to input spatial data to a computer. The trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axis, similar to an upside-down mouse.