The arena of computer graphics is diverse and vast. There exists a cross-section in the middle of the design and computer science. The whole process of making a computer-generated representation, from creating 3D models to the procedure of texturing, lighting, and rendering those modules to the digital display of those image synthesis on a computer display. In simpler words, it is the art of drawing pictures, charts, lines, etc. using a computer with the support of programming. A computer graphics image is made up of numbers of pixels, it is the smallest addressable graphical unit represented on a computer screen. 

Briefly Highlighted Points of  Computer Graphics

• A computer is an information processing machine in which the user communicates with the computer and the computer graphics. It is one of the commonly used and most effective ways of communicating with people or users.
• It shows the information through graphical representation such as images, charts, graphs, and diagrams. 
• The graphical representation or image conveys information in a very effective way and information can be easily distributed among the users. 
• In computer graphics, graphics objects are presented as the collection of discrete pixels. 
• We can control the color and intensity of the pixel which determines the look of the picture or image. 
• Rasterization is the process that determines which pixel provides the best approximation of the desired image.
• Scan conversion is the process of representing continuous graphics pictures as a collection of discrete pixels.

Use of Computer Graphics

It is used in all the possible sectors nowadays because all the sectors need the best graphics, images, picture to display their work or promote their work through it. It is also used in presentations in the form of bars, graphs, and images.  It is widely used in the entertainment, photography, film, electronic gadgets sectors. It is a wide area and subject of computer science education. Computer graphics used in rendering, UI design, a geometric object, animation, and various other zones. It is also known as the CG in most areas. Several tools are used for the execution of CG. The very basic tool is the <graphics.h> header file in Turbo-C, unity for advanced and even OpenGL is used for the execution. In 1960, Willam Fetter and Verne Hudson, the great researchers from Boeing, invented this basic tool. There are various uses of CG that become very important in the present time:-

1. Computer programming development
2. Video games (sidescrollers, first-person shooters, platformers)
3. Movies 
4. Creating commercial arts
5. Scientific modeling (Meteorological data and weather forecast)
6. Catalogs designing

2D and 3D Classification of Computer Graphics

2D and 3D are the two main classifications of computer graphics. The third dimension has become more attractive and popular but still, 2D is widely used in computer graphics. Let us discuss these both dimension one by one;

2D or Two Dimensional

It is a two-dimensional model, it is the computer-based generation of digital images. In 2D we just only use lines, shapes, and other tools to join it to create an image or object. It is further classified into two parts; Vector and Raster graphics. 

Vector graphics:- Shapes and lines are mainly used in such types of graphics. Inkscape and Adobe Illustrator have mostly used programs in vector graphics for designing computer games. 

Raster graphics:- Adobe Photoshop and Corel Paint Shop Pro are mostly used programs in it.  Pixels are used to create an image in such types of graphics. Its tools work as the bonus point because you can create a wonderful image effectively with the help of the tools like paintbrushes, erasers, and paint buckets. 

3D or Three Dimensional

Mostly it is known as 3DCG, CGI, or three-dimensional computer graphics. A 3D object has its own height, width, and depth.  3D computer graphics are the graphics that use 3D portals of geometric data.  Video games, movies, and TV shows are the application of it and 3d studio max, Maya. Blender and Bryce are programs that are used to make 3D graphics. 

What is CAD in Computer Graphics?

The full form of CAD is computer-aided design. It is the way of designing things on a digital screen rather than on paper. It is a high-tech and modern way of designing big models like airplanes, helicopters, cars, buses, and so on. It first appeared in 1959, when General Motors and IBM developed Design Augmented by Computer 1, it was the first CAD system ever used for creating automobiles on the computer display. 

It is a very easy way to draw an object on a computer screen with a graphics package then drawing on paper because here you can modify your work as much as you want. Apart from being easier and cheaper than using conventional methods of designing, CAD designs are very simple and easy to circulate around the world by Email. Here is one more big advantage of CAD is that CAD drawing can be converted spontaneously into production instruction for factory machines and industrial robots. 

Conclusion

Computer graphics are way better than conventional methods of creating images and pictures. New and advanced technology changes the whole image of graphics. The introduction of 2D and 3D objects takes it to another level of height. It makes the complicated task of designing and drawing very simple. 

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