GTU Computer Engineering (Semester 6)
Computer Graphics
May 2016
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Explain the working of CRT in detail.
7 M
1 (b) (i) Explain Beam Penetration method.
3 M
1 (b) (ii) Compare Raster Scan system and Random Scan System.
4 M

2 (a) Explain DDA line drawing algorithm with its advantages and disadvantages.
7 M
Solve any one question from Q2(b) & Q2(c)
2 (b) Explain Scan line fill algorithm. What is the use of active edge list and edge table?
7 M
2 (c) List the techniques used for inside-outside test of points and explain any one method in detail.
7 M

Solve any two question from Q3(a), Q3(b) & Q3(c), Q3(d)
3 (a) Define Clipping. Write and explain Cohen-Sutherland line clipping algorithm.
7 M
3 (b) Write a short note on 2D shearing along with X-direction and Y-direction.
7 M
3 (c) Explain Sutherland-Hodgeman polygon clipping algorithm.
7 M
3 (d) Perform 45° rotation of a triangle A(0,0), B(1,1) and C(5,2). Find transformed coordinates after rotation,
(1) About origin
(2) About point P(-1,-1).
7 M

Solve any two question from Q4(a), Q4(b) & Q4(c), Q4(d)
4 (a) What is Bezier Curve? Define properties of Bezier Curve.
7 M
4 (b) Derive the transformation matrix for 3D rotation about a line parallel to principle Axis.
7 M
4 (c) Show that Two dimensional reflection through X-axis followed by two dimensional reflection through line Y= -X, is equivalent to Pure rotation about origin by 270°.
7 M
4 (d) Explain 3D reflection with respect to selected axis and selected plane.
7 M

Solve any two question from Q5(a), Q5(b) & Q5(c), Q5(d)
5 (a) Write a short note on Back face detection method.
7 M
5 (b) Explain RGB color model.
7 M
5 (c) What is Parallel Projection? Explain types of Parallel Projection in detail.
7 M
5 (d) Explain CMY color model.
7 M



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