GTU Computer Graphics - June 2014 Exam Question Paper

GTU Computer Engineering (Semester 6)
Computer Graphics
June 2014

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) Define the following terms:
(1) Aliasing
(2) Persistence
(3) Frame buffer
(4) Resolution
(5) Scan conversion
(6) Aspect ratio
(7) Antialiasing

7 M

1 (b) Write a short note on: (1) Cathode ray tube (2) Shadow mask

7 M

2 (a) Write and explain the boundary fill algorithm and flood fill algorithm.

7 M

2 (b) Write and explain the midpoint circle generating algorithm.

7 M

2 (c) Write and explain the midpoint ellipse drawing algorithm.

7 M

3 (a) Prove that the reflection of a square ABCD [(2,2), (4,2), (4,4), (2,4)] about x axis (y =0) and then rotation of the resulting square about 60° will not be same if the order of

7 M

3 (b) Write a short on: (1) 2D Rotation (2) Reflection about an arbitrary line

7 M

3 (c) Solve the followings: Locate the new position of the triangle [(5,4), (8,3), (8,8)] after its rotation by 90° clockwise about the Centroid

7 M

3 (d) Write a short on: (1) 2D Reflection (2) Rotation about an arbitrary point.

7 M

4 (a) Define Clipping. Write and explain Cohen ? Sutherland line clipping algorithm.

7 M

Answer the following:

4 (b) 1) What do you mean by view plane?

1 M

4 (b) 2) What is type face?

1 M

4 (b) 3) Define: B-Spline curve

1 M

4 (b) 4) What is Polygon mesh?

1 M

4 (b) 5) What is surface patch?

1 M

4 (b) 6) What is a spline?

1 M

4 (b) 7) What are the different ways of specifying spline curve?

1 M

4 (c) Define Clipping. Write and explain Liang-Barsky line clipping algorithm.

7 M

Answer the following:

4 (d) 1) What is the need of homogeneous coordinates?

1 M

4 (d) 2) What is Transformation?

1 M

4 (d) 3) What is cubic spline?

1 M

4 (d) 4) What is Bezier Basis Function?

1 M

4 (d) 5) What is bitmap and what is pixmap?

1 M

4 (d) 6) List out the important properties of Bezier Curve.

1 M

4 (d) 7) Differentiate between interpolation spline and approximation spline?

1 M

5 (a) List out the different types of projections and explain any two in detail.

7 M

5 (b) Explain XYZ colour model.

7 M

Write a short note on:

5 (c) (i) Back face detection method.

3 M

5 (c) (ii) Depth buffer method for detection.

4 M

5 (d) Explain CMY colour model.

7 M

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