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Que. The Z-buffer algorithm is used for Hidden surface removal of objects. The maximum number of objects that can be handled by this algorithm shall
a. Depend on the application
b. Arbitrary no. of objects
c. Depend on the memory availability
d. Depend on the processor
Answer:Arbitrary no. of objects
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A point P(2, 5) is rotated about a pivot point (1, 2) by 60°. What is the new transformed point P'?
The Liang-Barsky line clipping algorithm uses the parametric equation of a line from (x1,y1) to (x2,y2) along with its infinite extension which is given as :

x = x1 + Dx.u
y = y1 + Dy.u

Where Dx = x2 – x1, Dy = y2 – y1, and u is the parameter with 0 ≤ u ≤ 1. A line AB with end points A(–1, 7) and B(11, 1) is to be clipped against a rectangular window with xmin=1, xmax=9, ymin=2, and ymax=8. The lower and upper bound values of the parameter u for the clipped line using Liang-Barsky algorithm is given as:
The Z-buffer algorithm is used for Hidden surface removal of objects. The maximum number of objects that can be handled by this algorithm shall
Which of the following is/are fundamental method(s) of antialiasing ?

(i) Increase of sample rate.
(ii) Treating a pixel as a finite area rather than as a point.
(iii) Decrease of sample rate.
Which of the following points lies on the same side as the origin  with reference to the line 3x + 7y= 2 ?
Which of the following statements is/are True regarding the solution to the visibility problem in 3D graphics?

S1: The Painter’s algorithm sorts polygons by depth and then paints (scan - converts) each Polygon on to the screen starting with the most nearest polygon.
S2: Backface Culling refers to eliminating geometry with backfacing normals.
Match the following :
a. Cavalier Projection              i. The direction of projection is chosen so that there is no foreshortening of lines                                                                     perpendicular to the xy plane.
b. Cabinet Projection              ii. The direction of projection is chosen so that lines perpendicular to the xy planes are                                                            foreshortened by half their lengths.
c. Isometric Projection           iii. The direction of projection makes equal angles with all of the principal axis.
d. Orthographic Projection    iv. Projections are characterized by the fact that the direction of projection is                                                                                 perpendicular to the view plane.

code:
a  b   c  d
Which of the following color models are defined with three primary colors ?
Which of the following is not true with respect to a trackball and/or spaceball ?

I. A trackball is a two dimensional positioning device while as a spaceball provides six degrees of freedom.
II. Unlike the trackball a spaceball does not actually move.
Ill. A trackball is a three dimensional positioning device while as a spaceball provides six degrees of freedom.
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
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