Mar 062014
 

BIM/Fifth Semester/ITC 221: Computer Graphics


Candidates are required to answer the questions in their own words as far as practicable.

Group ‘A’

1. Brief Answer Questions: 10×1=10

a) What do you mean by refresh rates?

b) How many k bytes does a frame buffer need in a 600×400 pixel?

c) What do you mean by symmetric property of circle?

d) Differentiate between uniform scaling and differential scaling.

e) Why projection is needed in computer graphics?

f) Define polygon table and polygon meshes.

g) List the buffer used in visible surface detection?

h) Define polygon rendering and illumination model.

i) What is the value of specular reflection parameter for dull and rough surface?

j) What is simulation?

Group ‘B’

Short Answer Questions: 5×3=15

2. List the applications of computer graphics and explain briefly.

3. Write the mid-point circle algorithms.

4. Derive the transformation matrix for fixed point rotation.

5. Explain scan line method for visible surface detection.

6. Explain phong shading model for polygon rendering.

Group ‘C’

Long Answer Questions: 3×5=15

7. a) Resterize the line with end point (10, 12) and (16, 20) using Bresenham’s line drawing algorithms.

b) Magnify the triangle with vertices A(0, 0, 0), B(1, 1, 1) and C(5, 2, 3) to twice its size while keeping (5, 2, 3) fixed.

8. a) Use the Cohen-Sutherland algorithms to clip the line with end points (70, 20) and (100, 10) against a window whose lower left hand corner at (50, 10) and upper right hand corner at (50, 40).

b) Calculate net transformation metrics for reflection through y = x lines.

9. Write short notes on:

  • Flat Panel display
  • Illumination model


 Posted by at 8:41 pm
Mar 062014
 

BIM/Fifth Semester/ITC 221: Computer Science


Candidates are required to answer the questions in their own words as far as practicable.

Group ‘A’

1. Brief Answer Questions: 10×1=10

a) What do you mean by aspect ratio?

b) If a image has a height of 2 inches and aspect ratio of 1.5. What is its width?

c) What DDA is faster than BLA? List the advantage of BLA over DDA.

d) What is the rotation matrix for rotation of object by angle 60-degree in counterclockwise direction?

e) What do you mean by orthographic projection?

f) What is the use of polygon table and meshes in computer graphics?

g) What do you mean by diffuse reflection?

h) Differentiate between intensity interpolation and constant interpolation technique.

i) What are the disadvantage of z-buffer algorithms?

j) What is virtual reality?

Group ‘B’

Short Answer Questions: 5×3=15

2. Write the Bresenham’s line drawing algorithms.

3. Derive the transformation matrix for fixed point scaling.

4. Derive the window to view port transformation matrix.

5. Explain z-buffer method for visible surface detection.

6. Explain Graud shading model for polygon rendering and list its disadvantages.

Group ‘C’

Long Answer Questions: 3×5=15

7. a) Resterize the circle with center (10, 10) and radius = 10.

b) Rotate the triangle with vertices A(0, 0, 0), B(1, 1, 1) and C(5, 2, 3) by angle 90 – degree in clockwise direction about Z = 2 line.

8. a) Suppose a clipping windows located at A(20, 20), B(60, 20), C(60, 40) and D(20, 40). Find the new co-ordinates of the line with end points P(40, 80) and Q(120, 30).

b) Calculate net transformation metrics for reflection through y + x = 0 lines.

9. Write the short notes on (any two)

  • Application of computer graphics
  • Delta CRT
  • Computer Animation


 Posted by at 7:55 pm