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IGNOU UNIVERSITY MCA - III (SEM 5) JUN 2009 : Computer Graphics and Multimedia

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MCA (Revised) rf) O \O Term-End E xamination |une, 2009 oo O MCS-053 : C OMPUTER GRAPHICS AND MULTIMEDIA Time : 3 h ours Note : L. Maximum M arks : L 00 N Q uestion umber1 -i s c ampulsory.A ttempt a ny t hree questions f ro* t he r est. ( u) (b) (c) (d) (") (0 Define t he t erm i ntensity i nterpolation ? Explain G oroud s hading. Write Z-Buffer Algorithm for hidden surface detection. E xplain h ow t his a lgorithm i s applied to determine the hidden surfaces. Wlrat is image filtering ? \,t/hy is it required ? Compute the intermediate points on the line drawn f rom ( 0,0) t o ( 5,10) u sing Bresenham's lgorithm. a What is the difference between parallel and perspective p rojection? C ategorize t he various g pes o f p arallel p rojections. Explain the concept of window to view port S 5 5 5 5 5 transformation w ith t he h elp o f s uitable diagram. MCS-053 P.T.O. (e) t he a dvantage o f u sing homogenousc oordinate s ystem ? W rite t he transformation m atrix i n h omogenous coordinate s ystem f or " xy-shear"a bout t he What is origin. (h) 2. Why d o w e u se a n a uthoring t ool i n t he context o f m ultimedia ? E xplain t he f eatures of a ny t wo t ypes o f a uthoring t ools. (a) Explain t he f ollowing t erms w ith t he h elp of a n e xamplef d iagram, i f n eeded. (i) (ii) T weening (iii) V olume R endering (i") (b) M orphing F ractual M odels Derive a g eneralzD t ransformation m atrix for r otation a bout t he o rigin. P erform a 4 5" rotation o f a s quare h aving v ertices A (0,0), B(0,2),C (2,2), D (2,0), a bout t he o rigin (.) Explain C yrus B eckp arametricl ine c lipping algorithm. 3. (a) MCS-053 Derive t he 2 D-transformation m atrix f or reflection a bout t he l ine A =ntx,w here m r s a constant. U se t his t ransformation m atrix t o reflect t he t riangle A (0,0), B (1,1), C (2,0) about t he l ine y =zx. L0 (b) Explain p seudocode f or S utherland hodgman p olygon c lipping a lgorithm. Using t his a lgorithm c lip t he f ollowing polygon a gainst t he r ectangular w indow L0 ABCD a s g iven b elow. 4. (u) \zVhat re t he r efreshing d isplay d evices ? a Describe t he w orking p rinciple o f C RT displays w ith t he h elp o f s uitable d iagram. Differentiate b etween R andom a nd R aster Scand isplay d evices. (b) Write t he t hree m ain p roperties o f B ezier curve. E xplain t he c ondition f or s moothly joining t wo B ezier c urve s egments. (.) Explain t he p rinciple o f R ay T racing w ith the h elp o f a s uitable d iagram. L ist a t l east four a pplications o f R ay T racing. MCS-053 P.T.O. J. Explain t he f ollowing t erms w ith t he h elp o f suitable diagramf example, if needed. (u) O blique P rojection. (b) B ezier S urfaces. (c) O bject-spacea pproach i n V isible-surface detection. (d) S pecular R eflection. (") R epresentationalA nimation. (0 H yper m edia. (g) G IF F ile c ompression. (h) D rawing & p ainting d evices. -oOo- MCS-053 20

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Additional Info : Mca - III (sem 5) June 2009 Question Paper - Computer Graphics and Multimedia (Revised Course)
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