## BCA 2nd YEAR COMPUTER GRAPHICS Last & Previous Year Question

#### COMPUTER GRAPHICS Question Paper

2013

Part-A 10 x 1 = 10

1. What are the different uses and applications of Computer Graphics?

2. Differentiate Raster system with Random system.

3. What is virtual reality?

4. What do you mean by high definition system?

5. Define aspect ratio.

6. What is the difference between bitmap and pixmap?

7. Explain the basic operation of a CRT.

8. List the difference between trackball and space ball.

9. What advantages do LCD and plasma displays share over CRT?

10. Why are Homogeneous coordinates required?

Part-B 5 x 2 = 10

1. What are the functions of Laser Printer?

2. What is Inverse transformation?

3. What is the advantages of electrostatic plotters? Explain its functions.

4. What do you mean by character generation?

5. In a raster system with resolution 2560 x 2048. How many pixels could be assessed per second by a display controller that refreshes the screen at a rate of 60 Frames per second? Also, calculate access time per pixel in the system.

Part-C 10 x 3 = 30

1 Explain the Cohen-Sutherland line clipping algorithm with region code details.

OR

1. Write Bresenham's line algorithm for the line where |m|<1. Digitize a line with endpoints (20,10) and (30,18).

2 (a) What is the difference between diffuse reflection and specular reflection?

OR

2. (a) Explain the Sutherland-Hodgeman Polygon clipping algorithm.

(b) Derive a formula to rotate a point by 0°.

3. (a) Explain shearing

(b) Show that a reflection about the line y = -X is equivalent to a reflection relative to the y-axis followed by a counter clock wise rotation of 90°.

OR

3. Explain the mid-point circle algorithm. Rasterize circle points using this algorithm for R=10 and (xc, yc) at (10, 10).

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