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CON/1897-Q6.
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N.B. :
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b.
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[ REVISED C<XJRSE ] TV43499
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(3 Hours) [ Total Marks: 100
(1)
(2)
Ql.
Question No.1 is compulsory.
Attempt any four questions from remaining six questions.
Whnt is nntialhlsing.md alhlsing?Exphlin.
Write n lu;ogramto (h'a", twoconcenhic circlesone with RED and other with BLUE color
boundaries use a tilling algorithm to fill the region betweenthe circles with YELLOWcolor
and use n different algorithm to till the inner circle with GREEN color.
.RED color bOllll(hlry ---.. /' " Fill with GREEN color
BLUE color bou8(hu')' Fill with YELLOW color
c. Write and exphlin the Depth buffer itlgorithm for detecting yisible smfnces
Q2.
a. Find the clipping coordinates to clip the line segment AB against the window using Cohen
Sutherland line clipping algorithm.
A(120, 60), B(160, 92) .
Xwmin =100 ; Ywmin= 80 ;
Xwmax = 150;Ywmax = 100;
Explain the working of a raster scan display and random scan display and comlHu'e them.
b.
Q3.
a. Derive the Bresenham's Line Drawing algorithm for line with slope < 1 use it to digitize the
linewithend points A == (40,10) and B == (50,16). Givethe plot of pixels gencrated along the
linc I>ath.
Write a short note on Phong shading. What is its advantage over constant intensity shading?
b.
Q4.
a. ..
Derh'c'the transformations for producing it parallcll>rojection .When is a projection called
(i) Cavalier (ii)Cabinet (iii) axonometric(iv)isometric? '
Explain the scan line method for removing hiddcn surfaces with thc help of an example. Is it
image space or object sl>acemethod?
b.
Q5.
a. Write a sequence of 2D transformations for the following
(i) To reflect an object about the line y =mx +c
(ii) To Rotate an object nbout 41I>ivotI>oint
(Hi) To scale nn object with respect to a tixed point
Also write the matrices.ateach step and final matrix.
b. Write a noteonthe input deviceke)'board.
Q6.
a. Write a note on the commonReflectionsand shearing transformations in 2 Dimensionaland
3 Dimensionalsystem.Which reflectionconvertscoordinate specificiltionfromleft handed
system'to a Right handed system? Write its matrix. '
b. Write theproperties ofBezier curvesand surfacesand B-sl>linecurves.
Q7. Write short notes on
a. Perspectiveprojections
b. ,Homogeneouscoordinatesystem
c. 3Dclipping
d. Halftoning
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