# MCQ IN COMPUTER SCIENCE & ENGINEERING

## COMPUTER SCIENCE AND ENGINEERING

### COMPUTER GRAPHICS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Mapping the world co-ordinates into physical device co-ordinates is called
 A Translation B Homogenous coordinates C Coordinates Transformation D Viewing Transformation
Explanation:

Detailed explanation-1: -Viewing Transformation is the mapping of coordinates of points and lines that form the picture into appropriate coordinates on the display device. World coordinate system (WCS) is the right handed cartesian co-ordinate system where we define the picture to be displayed. A finite region in the WCS is called the Window.

Detailed explanation-2: -5. The process of mapping a world window in World Coordinates to the Viewport is called Viewing transformation. Explanation: The viewing transformation is the operation of computer graphics in which the maps are the perspective view of an object in world coordinates into a physical device’s display space.

Detailed explanation-3: -Window to Viewport Transformation is the process of transforming 2D world-coordinate objects to device coordinates. Objects inside the world or clipping window are mapped to the viewport which is the area on the screen where world coordinates are mapped to be displayed.

Detailed explanation-4: -This mapping called workstation transformation (It is accomplished by selecting a window area in normalized space and a viewport area in the coordinates of the display device).

Detailed explanation-5: -Viewing Coordinates system, [u, v, w], describes 3D objects with respect to a viewer. • A viewing plane (projection plane) is set up perpendicular to w and aligned with (u, v).

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