Which of the following statement(s) is/are incorrect ? (a) Mapping the co-ordinates of the points and lines that form the picture into the appropriate co-ordinates on the device or workstation is known as viewing transformation. (b) The right-handed cartesian co-ordinates system in whose co-ordinates we describe the picture is known as world co-ordinate system. (c) The co-ordinate system that corresponds to the device or workstation where the image is to be displayed is known as physical device co-ordinate system. (d) Left - handed co-ordinate system in which the display area of the virtual display device corresponds to the unit (|x|) square whose lower left-hand corner is at the origin of the co-ordinate system, is known as normalized device co-ordinate system. Codes :
(d) only
The viewing transformation maps picture coordinates onto device or workstation coordinates, so statement (a) is right.
The world coordinate system is the right-handed Cartesian system in which the picture is described, and the physical device coordinate system belongs to the actual output device, so (b) and (c) are right.
The normalized device coordinate system is the unit (1 by 1) square of a virtual device with its lower left corner at the origin, but it is described as a right-handed system, so calling it left-handed makes (d) wrong.
Only statement (d) is incorrect.
Hence, (d) only.
Similar Questions
In Cyrus-Beck algorithm for line clipping the value of t parameter is computed by the relation :
(Here P1 and P2 are the two end points of the line, f is a point on the boundary, n1 is inner normal)
Consider a window bounded by the lines : x = 0; y= 0; x = 5 and y = 3. The line segment joining (-1, 0) and (4, 5), if clipped against this window will connect the points
Arrange the 2-D viewing transformation pipeline.
A. Convert world-coordinates to viewing coordinates
B. Map viewing coordinates to normalized viewing coordinates using window - viewpoint specifications
C. Construct world - coordinates scene using modeling - coordinates transformations
D. Map normalized viewpoint to device coordinates
Choose the correct answer from the options given below:
Let R be the rectangular window against which the lines are to be clipped using 2D Sutherland-Cohen line clipping algorithm. The rectangular window has lower left-hand corner at (– 5, 1) and upper right-hand corner at (3, 7). Consider the following three lines for clipping with the given end point co-ordinates :
Line AB : A (– 6, 2) and B (–1, 8)
Line CD : C (– 1, 5) and D (4, 8)
Line EF : E (–2, 3) and F (1, 2)
Which of the following line(s) is/are candidate for clipping ?
Important Questions from Two Dimensional Viewing
- Which of the following technique is used for Clipping?
In Cyrus-Beck algorithm for line clipping the value of t parameter is computed by the relation :
(Here P1 and P2 are the two end points of the line, f is a point on the boundary, n1 is inner normal)
Rearrange steps involved in two dimensional viewing transformation.
I. Map normalized viewport to device Co-ordinates
II. Convert world co-ordinate to viewing co-ordinates
III. Construct world – co-ordinate scene using modeling coordinate transformation
IV. Map viewing co-ordinates to normalized viewing co-ordinates using window-viewportspecification
Consider a window bounded by the lines : x = 0; y= 0; x = 5 and y = 3. The line segment joining (-1, 0) and (4, 5), if clipped against this window will connect the points
Arrange the 2-D viewing transformation pipeline.
A. Convert world-coordinates to viewing coordinates
B. Map viewing coordinates to normalized viewing coordinates using window - viewpoint specifications
C. Construct world - coordinates scene using modeling - coordinates transformations
D. Map normalized viewpoint to device coordinates
Choose the correct answer from the options given below:
