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QUESTION BANK

COMPUTER GRAPHICS AND ANIMATION

Unit-1

1)

a) What do you mean by scientific visualization? Explain.

b) Is there any difference between computer graphics and image processing? Explain.

c) Describe the term persistence and resolution in reference to CRT.

d) Explain the architecture of a raster system with a fixed portion of the system memory reserved for the frame buffer.

e) Explain the various kinds of input devices used for computer animation

f)Define the following:

i) Positioning Techniques

ii) Dragging

2)

a) Explain the Display file structure.

b) Calculate the aspect ratio of 12inch * 16 inch display.

c) Explain the principle of drawing thick line segments.

d)Write the steps involved in scan converting dashed lines.

e)What are the different types of polygons? Categorize the following according to their types:

f) What are Segments? State the need for having a segmented display file.

g) Prove that simultaneous shearing in both directions (x & y directions), is not equal to the composition of pure shear along x- axis followed by pure shear along y –axis

h) Differentiate between a window and a view port.

i) What is the principle behind the depth comparison?

j) State the reason to go ion for backface removal algorithm.

k)Give the properties of Bezier Curve.

l) What is Animation? Name two basic types.

m)Give the four basic primitives of the GKS.

n) What is aliasing? Name the two methods to avoid Aliasing.

3)

a) Differentiate between presentation graphics and computer art.

b) Describe the term graphical user interface (GUI).

c) Discuss the functioning of refresh cathode ray tube.

d) Name any three-dimensional viewing devices. Explain the functioning of any one of them.

e) Explain different kind of printers and plotters.

f) Define the following:

i) Pointing and Selection methods

ii) Graphical potentiometers.

4)

a) What are parallel line algorithms? Set up a parallel Bresenham’s algorithm for give np processors.

b) Give architecture of raster graphic system with a display processor.

c) What are the shadow mask method.

d) Illustrate applications of antialising techniques to the boundaries of areas to remove jagged appearance.

e) How can image be drawn and change display through frame buffer bit pattern? Explain through diagram.

f) How does a flat panel display work?

5)

a) Describe the Bresenham algorithm for drawing a line. Also explain the advantages of this algorithm over DDA algorithm.

b) What is frame buffer? How can image be drawn, and change display through fame buffer bit pattern? Explain with the help of suitable block diagram and flow-chart.

c) A noninterlaced CRT has a refresh rate of 60 Hz. The computer hooked up to the CRT displays a 600*200 pixel memory map. Top and bottom vertical overscan are 10 and 14 percent respectively and left and right horizontal overscan are 20 and 10 percent respectively. Calculate how many seconds from the strart of a refresh cycle it will take for the electron beam to reach a light pen located at the following screen coordinates:

(i) (137, 80)

(ii) (580, 190)

(iii) 28, 195)

d) Give the difference between raster scan CRT and vector CRT’s.

e) What is a display file structure? Also write the steps to store an instruction into a display file.

f) What do you mean by Aliasing? How can it be avoided?

Unit-2

1)

a)Give Bresenham’s line dressing algorithm. Explain the same with suitable example.

b)Describe boundary fill algorithm for polygon with suitable example.

c)Discuss the method for storing color values in a color lookup table (or video lookup table) where each entry in the table uses 24 bits to specify an RGB color.

d)Define the following:

a. Point Clipping

b. Line Clipping

e)What do you mean by display file? What are the functions for segmenting the display file?

f)Using midpoint method, and taking symmetry into account, develop an algorithm for the curve over the interval -10 ................
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