537 questions and answers
Introduction of Transformations
Computer Graphics provide the facility of viewing object from different angles. The architect can study building from different angles i.e. 1. Front Evaluation
Describe Scan Line Polygon Fill Algorithm.
This algorithm lines interior points of a polygon on the scan line and these points are done on or off according to requirement. The polygon is filled with various colors by coloring various pixels.
Describe Flood Fill Algorithm.
In this method, a point or seed which is inside region is selected. This point is called a seed point. Then four connected approaches or eight connected approaches is used to fill with specified color.
Write down Bresenham's Circle Algorithm .
Scan-Converting a circle using Bresenham's algorithm works as follows: Points are generated from 90° to 45°, moves will be made only in the +x & -y directions as shown in fig:
What are the application of Computer Graphics ?
Computer-generated model of the physical, financial and economic system is often used as educational aids. Model of physical systems, physiological system, population trends or equipment can help trainees to understand the operation of the system.
What is Computer Graphics ?
It is difficult to display an image of any size on the computer screen. This method is simplified by using Computer graphics. Graphics on the computer are produced by using various algorithms and techniques.
Bresenham's Line Algorithm.
This algorithm is used for scan converting a line. It was developed by Bresenham. It is an efficient method because it involves only integer addition, subtractions, and multiplication operations. These operations can be performed very rapidly so lines can be generated quickly.
DDA Line generation Algorithm .
In any 2-Dimensional plane if we connect two points (x0, y0) and (x1, y1), we get a line segment. But in the case of computer graphics we can not directly join any two coordinate points, for that we should calculate intermediate point’s coordinate and put a pixel for each intermediate point, of the desired color with help of functions like putpixel(x, y, K) in C, where (x,y) is our co-ordinate and K denotes some color.
Z-Buffer or Depth-Buffer method
When viewing a picture containing non transparent objects and surfaces, it is not possible to see those objects from view which are behind from the objects closer to eye. To get the realistic screen image, removal of these hidden surfaces is must.
Different between Graphics Card and Video Card
A graphics card is a printed circuit board that houses a processor and a RAM. It is a piece of computer hardware that produces the image you see on a monitor. The visual part of the network helps in controlling and improving the pictures, videos, animations and other features.
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