exam papers

USN
R. V. COLLEGE OF ENGINEERING
Autonomous Institution affiliated to VTU
VII Semester B. E. Examinations Dec-10/Jan-11
Computer Science and Engineering
COMPUTER GRAPHICS
Time: 03 Hours Maximum Marks: 100
Instructions to candidates:
Answer FIVE questions choosing at least Two questions Part-A and Two questions from Part-B.
 PART- A 
 
 1 a Explain the following terms:
Aspect ratio; (2) Interlaced display; (3) Refresh Rate; (4) Rasterization; (5) Frame Buffer. 05 
 b Explain the graphics pipeline architecture. 05 
 c Write a program to construct a two dimensional gasket using open GL. 10 
 
 2 a Explain the following types of polygons in OpenGL:
GL_Polygon (2) GL_Triangles (3) GL_Quads
(4) GL_Triangle_Strip (5) GL_Quad_Strip (6) GL_Triangle_Fan 06 
 b Explain the two forms of text and the merits & demerits of each method. Explain the GLUT library function used to display text with an example. 08 
 c Explain the glortho( ) function with syntax and an example. 06 
 
 3 a Explain the different input modes of operation. 08 
 b How are menus created in OpenGL? What are the APIs used? Illustrate with examples. 08 
 c What are Call back functions? Explain how a keyboard event is handled in OpenGL? 04 
 
 4 a Explain the following functions of GLUT library with appropriate syntax and examples: glutDisplayFunc ( ); glutMouseFunc ( ); glutMotion Func ( ); glutPassiveMotionFunc ( ); glutCreateWindow( ). 5 x3 
 b Explain, with a neat diagram, the display processor architecture. 05 
 


 PART-B 
 
 5 a Show that the following sequences commute: (use 2D Homogenous coordinates)
A rotation and a uniform scaling;
Two rotations about the same axis. 08 
 b Explain the following APIs with appropriate syntax and examples: glTranslate ( ) ; glRotate ( ) ; glScale ( ) ;