NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JANUARY/FEBRUARY 2013 EXAMINATION

CIT 371 – INTRODUCTION TO COMPUTER GRAPHICS AND ANIMATION

Instruction:                 Answer Any Five Questions

Time Allowed:            3 Hours

1a.        What do you understand by computer graphics?                                                        4 marks

 b.        List the six major elements of a graphic system.                                                                       6 marks

 c.         List four major areas of computer graphics.                                                                  4 marks

2a.        What do you understand by BRDF?                                                                            4 marks

  b.         Explain the two classes and two properties of BRDFs.                                                            10 marks

3a.        Explain the term transformations.                                                                              3 marks

 b.        Outline, with an example each, the three classes of transformations.                                         9 marks

 c.         What are homogeneous coordinates?                                                                           2 marks

4a.       Explain the thin lens Camera Model.                                                                         5 marks

  b.       Define focal length.                                                                                                     3 marks

  c.        Outline two important properties of perspective projection.                                        6 marks

5a.        What do you understand by rasterization?                                                                4 marks

 b.        Explain Z-buffering and state one of its uses.                                                             4 marks

 c.         Outline the three major techniques of mapping methods.                                            6 marks

6a.       What are models?                                                                                                       5 marks

  b..       State two advantages and three disadvantages of hierarchies.                                                                                                                                                                                                  5 marks          

  c.        State two applications of models.                                                                                    4 marks

7a.        What do you understand by keyframing?                                                                     3 marks

 b.        State two advantages and two disadvantages of keyframing.                                                    4 marks

 c.         What is motion capture?                                                                                               3 marks

 d.        Enumerate two advantages and two disadvantages of motion capture.                                     4 marks