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ECS5O4

Following Paper ID and Roll No. to be filled in your Answer

B.Tech. (sEM. V) ODD SEMESTER THEORY EXAMINATION 20I3.14

COMPUTERGRAPHICS Time

: 2 Hours

Total Marlcs

:

50

Note :-Attempt all questions.

1.

Attempt any two parts of the following

(a)

:

(2x7=14)

Explain Frame buffer and Video basics. Also explain the terms Pixel, Aspect Ratio, Resolution.

O) Develop and write mid point circle algorithm. Apply it to predict the pixels in any octant for the circle whose centre is origin and radius = I 4 units.

(c)

Explain the parallel version of line algorithm by two methods.

2.

Attempt any two parts of the following

(a)

:

(2x6=12)

Reflect the polygon whose vertices are (-1, 0), (0, -2), (1, 0) and (0, 2) about the

:

(, Horizontal line Y= 2 (ii) VerticallineX:2. ECSso4/DNG-52027

[TurnOver

(b)

Write Cohen and Sutherland line clipping algorithm. Apply

it for calculating the saved Portion of a line from (2, 7) to

(8, 12) in a window (X w min = Y w

min:

5 and

Xwmax:Ywmax:10).

(c)

I

Write Sutherland-Hodgemanpolygon clipping algorithm. Explain the modification given by Weiler and Atherton for

concavepolygon.

3.

Attempt anytwoparts ofthe following

(a)

:

(2x6:12)

Derive rotation about X-axis, Y-axis andZ-axismatrices in 3-D. Prove that for any rotation matrix

R'(0):R(-g). O)

Derive oblique parallel projection and perspective projection matrices.

(c)

4.

Establish andwrite Cynrs-Beck 3-D line clipping algorithm.

Attempt anytwoparts ofthe following

(a)

:

(2x6=12\

Write at least 4 properties of Beizer curves. Calculate and

roughly trace the Beizer curve for three control points (1, l), (2,2)and(3,1).

O) (c)

Explain specular reflection and phong model. Write Depth-buffer method algorithm of hidden lines.

ECS504/DNG-52027

15800

UPTU B.Tech Computer Graphics ECS-504 Sem 5_2013-14.pdf ...

terms Pixel, Aspect Ratio, Resolution. O) Develop and write mid point circle algorithm. Apply it to. predict the pixels in any octant for the circle whose centre.

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