Tuesday, May 13, 2014

COMPUTER GRAPHICS (XCS 354) UNIT – V

1. Define computer graphics animation? 
Computer graphics animation is the use of computer graphics equipment where the graphics output presentation dynamically changes in real time. This is often also called real time animation. 

2. What is tweening? 
It is the process, which is applicable to animation objects defined by a sequence of points, and that change shape from frame to frame. 

3. Define frame? 
One of the shape photographs that a film or video is made of is known as frame. 

4. What is key frame? 
One of the shape photographs that a film or video is made of the shape of an object is known initially and for a small no of other frames called keyframe 

5. What is pseudo animation? 
Pseudo animation is creating a sequence of stills, photographing or video graphing each still as one frame, and then later playing back the frames at a faster speed. 

6. What is the normal speed of a visual animation? 
Visual animation requires a playback of at least 25 frames per second. 



7. What are the different tricks used in computer graphics animation? 
a. Color look Up Table manipulation 
b. Bit plane manipulation 
c. Use of UDCS 
d. Special drawing modes 
e. Sprites 
f. Bit blitting

 8. What is color look up table? 
In color display unit it is necessary to read 44-bit for each pixel from buffer. This very time consuming process. To avoid this video controller uses look up table to store many entries of pixel vales in RGB format. This look up table is commonly known as color look up table. 

9. What is solid modeling? 
The construction of 3 dimensional objects for graphics display is often referred to as solid modeling. 

10. What is an intuitive interface? 
The intuitive interface is one, which simulates the way a person would perform a corresponding operation on real object rather than have menu command. 

11. What is Sprite? 
A Sprite is graphics shape in animation and games programs. Each sprite provided in the system has its own memory area similar to but smaller than pixel RAM. 

12. What is the UDC technique? 
UDC stands for User Defined Character set. It is graphics animation trick, which is used in early microcomputer system.

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