Jawaharlal Nehru Technological University Kakinada 2009-2nd Sem B.Tech Computer Science and Engineering Code No: P0501/R05 ,Set No2, IIISupplementary s, / COMPUTER GRAPHICS - Question Paper

For Code No: P0501/R05 ,Set No. 2, III .BTech II Semester Supplementary Examinations, Nov/Dec 2009 COMPUTER GRAPHICS
See the subsequent attachment.

Code No: P0501/R05    Set No. 2

III B.Tech II Semester Supplementary Examinations, Nov/Dec 2009

COMPUTER GRAPHICS (Computer Science & Engineering)

Time: 3 hours    Max Marks: 80

Answer any FIVE Questions All Questions carry equal marks

1.    (a) Consider a non interlaced raster monitor with a resolution of n by m (m scan

lines and n pixels per scan line), a refresh rate of r frames per second, a horizontal retrace time of t horiz and vertical retrace time of tvert. What is the fraction of total refresh time per frame spent in retrace of the electron beam.

(b) Explain the applications for large-screen displays. What graphical output devices support it?    [12+4]

2.    (a) Explain how the pixel screen positions are stored and retrieved from frame

buffer.

(b) What are the steps involved in mid point circle algorithm?    [8+8]

3.    (a) Describe the transformation which reflects an object about an arbitrary line

L.

(b) What is the relationship among rotation (R_e) , inverse rotation (R_-e) and coordinate rotation (Rg).    [8+8]

4.    Let R be a rectangular window whose lower left corner is at L (-3,1) and upper right-hand corner is at R(2,6). If the line segment is defined with two end points A(-1,5) and B (3,8) determine

(a)    The region codes of the two end points,

(b)    Its clipping catezory and

(c)    Stages in the clipping operations using Cohen-Sutherland algorithm. [16]

5.    If the equation for a plane surface is expressed in the form Ax+By+Cz+D=0. Explain the procedure to calculate the parameters A, B, C and D using Cramer's rule if the three successive polygon vertices are given as input.    [16]

6.    Define tilting as a rotation about the x-axis followed by a rotation about the y-axis. If 9_x, d_y are the rotations about x and y-axis.

(a)    Find the tilting matrix

(b)    Docs the order of performing the rotation matter.    [16]

7.    (a) If the camera viewing direction is V and the surface normal of plane is N, how

to determine whether the surface visible with respect to viewing direction or not.

(b) Explain the depth-buffer method for elimination of hidden surfaces. [16]

8. (a) List and explain about the steps of animation.

(b) What are the various types of interpolation used in animation.    [8+8]

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Attachment: jawaharlal-nehru-technological-university-kakinada-2009-b-tech-computer-science-and-engineering-58167-1.pdf

Earning:   Approval pending.